{"id":122,"date":"2026-04-29T21:47:55","date_gmt":"2026-04-29T13:47:55","guid":{"rendered":"https:\/\/larkdrop.cafe\/?p=122"},"modified":"2026-05-22T16:52:01","modified_gmt":"2026-05-22T08:52:01","slug":"spring-ioc","status":"publish","type":"post","link":"https:\/\/larkdrop.cafe\/index.php\/2026\/04\/29\/spring-ioc\/","title":{"rendered":"Spring IOC"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u4ecb\u7ecdSpring<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-1-springframework\u7684\u8d77\u6e90\">SpringFramework\u7684\u8d77\u6e90<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Spring Framework\u901a\u5e38\u4eba\u4eec\u79f0\u4e4b\u4e3aSpring\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Spring\u662f\u4e00\u4e2a\u5f00\u6e90\u6846\u67b6\uff0cSpring\u662f\u4e8e2003 \u5e74\u5174\u8d77\u7684\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684Java \u5f00\u53d1\u6846\u67b6\uff0c\u7531<strong>Rod Johnson<\/strong>&nbsp;\u5728\u5176\u8457\u4f5cExpert One-On-One J2EE Development and Design\u4e2d\u9610\u8ff0\u7684\u90e8\u5206\u7406\u5ff5\u548c\u539f\u578b\u884d\u751f\u800c\u6765\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u662f\u4e3a\u4e86\u89e3\u51b3\u4f01\u4e1a\u5e94\u7528\u5f00\u53d1\u7684\u590d\u6742\u6027\u800c\u521b\u5efa\u7684\u3002\u6846\u67b6\u7684\u4e3b\u8981\u4f18\u52bf\u4e4b\u4e00\u5c31\u662f\u5176\u5206\u5c42\u67b6\u6784\uff0c\u5206\u5c42\u67b6\u6784\u5141\u8bb8\u4f7f\u7528\u8005\u9009\u62e9\u4f7f\u7528\u54ea\u4e00\u4e2a\u7ec4\u4ef6\uff0c\u540c\u65f6\u4e3a J2EE \u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u63d0\u4f9b\u96c6\u6210\u7684\u6846\u67b6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Spring\u662f\u4e00\u4e2a\u5206\u5c42\u7684Java SE\/EE full-stack(\u4e00\u7ad9\u5f0f) \u8f7b\u91cf\u7ea7\u5f00\u6e90\u6846\u67b6\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-2-\u601d\u8def\u6f14\u53d8-\u4ece\u624b\u52a8\u521b\u5efa\u5230\u5bb9\u5668\u7ba1\u7406\">\u601d\u8def\u6f14\u53d8\uff1a\u4ece\u624b\u52a8\u521b\u5efa\u5230\u5bb9\u5668\u7ba1\u7406<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9636\u6bb5\u4e00\uff1a\u6bcf\u4e2a\u5165\u53e3\u81ea\u5df1\u521b\u5efa\u5b9e\u4f8b\u3002<\/strong>&nbsp;\u5728\u4f20\u7edf JavaEE \u5199\u6cd5\u4e2d\uff0c<code>UserServlet<\/code>\u3001<code>ProductServlet<\/code>\u3001<code>GoodsServlet<\/code>&nbsp;\u90fd\u53ef\u80fd\u5728\u81ea\u5df1\u7684\u4ee3\u7801\u91cc\u76f4\u63a5&nbsp;<code>new<\/code>&nbsp;\u51fa\u9700\u8981\u7684 Service \u5bf9\u8c61\u3002\u8fd9\u6837\u867d\u7136\u80fd\u5b8c\u6210\u8c03\u7528\uff0c\u4f46\u5b9e\u4f8b\u521b\u5efa\u903b\u8f91\u5206\u6563\u5728\u5404\u4e2a Servlet \u4e2d\uff0c\u540c\u4e00\u4e2a Service \u8fd8\u53ef\u80fd\u88ab\u91cd\u590d\u521b\u5efa\uff0c\u540e\u7eed\u66ff\u6362\u5b9e\u73b0\u6216\u7edf\u4e00\u589e\u5f3a\u90fd\u4f1a\u53d8\u5f97\u56f0\u96be\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010120057.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010120057.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u9636\u6bb5\u4e00\uff1a\u6bcf\u4e2a\u5165\u53e3\u81ea\u5df1\u521b\u5efa\u5b9e\u4f8b\"\/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9636\u6bb5\u4e8c\uff1a\u628a\u521b\u5efa\u52a8\u4f5c\u4ece Servlet \u4e2d\u62ff\u51fa\u53bb\u3002<\/strong>&nbsp;Servlet \u7684\u6838\u5fc3\u804c\u8d23\u5e94\u8be5\u662f\u63a5\u6536\u8bf7\u6c42\u3001\u8c03\u7528\u4e1a\u52a1\u3001\u8fd4\u56de\u54cd\u5e94\uff0c\u800c\u4e0d\u662f\u7ba1\u7406\u4e1a\u52a1\u5bf9\u8c61\u7684\u521b\u5efa\u3002\u5982\u679c Service \u4ecd\u7136\u7531 Servlet \u76f4\u63a5\u521b\u5efa\uff0c\u63a7\u5236\u5c42\u5c31\u4f1a\u548c\u5177\u4f53\u5b9e\u73b0\u7c7b\u5f3a\u8026\u5408\uff0c\u56e0\u6b64\u9700\u8981\u628a\u5bf9\u8c61\u521b\u5efa\u6743\u4ece Servlet \u4e2d\u5265\u79bb\u51fa\u6765\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010157348.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010157348.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u9636\u6bb5\u4e8c\uff1a\u628a\u521b\u5efa\u52a8\u4f5c\u4ece Servlet \u4e2d\u62ff\u51fa\u53bb\"\/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9636\u6bb5\u4e09\uff1a\u901a\u8fc7\u7edf\u4e00\u5bf9\u8c61\u7ba1\u7406\u533a\u83b7\u53d6\u5f15\u7528\u3002<\/strong>&nbsp;\u5f53\u5bf9\u8c61\u4e0d\u518d\u7531 Servlet \u521b\u5efa\u540e\uff0c\u53ef\u4ee5\u628a\u7a0b\u5e8f\u8fd0\u884c\u6240\u9700\u7684\u5b9e\u4f8b\u96c6\u4e2d\u4fdd\u5b58\u5230\u4e00\u4e2a\u7edf\u4e00\u4f4d\u7f6e\u3002Servlet \u53ea\u8d1f\u8d23\u6839\u636e\u9700\u8981\u83b7\u53d6\u5bf9\u8c61\u5f15\u7528\uff0c\u8fd9\u6837\u521b\u5efa\u903b\u8f91\u88ab\u96c6\u4e2d\u7ba1\u7406\uff0c\u8c03\u7528\u65b9\u4e5f\u4e0d\u5fc5\u5173\u5fc3\u5bf9\u8c61\u5230\u5e95\u662f\u5982\u4f55\u4ea7\u751f\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010229568.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010229568.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u9636\u6bb5\u4e09\uff1a\u901a\u8fc7\u7edf\u4e00\u5bf9\u8c61\u7ba1\u7406\u533a\u83b7\u53d6\u5f15\u7528\"\/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9636\u6bb5\u56db\uff1a\u5bb9\u5668\u7528\u6620\u5c04\u5173\u7cfb\u7ef4\u62a4\u5b9e\u4f8b\u3002<\/strong>&nbsp;\u8fd9\u4e2a\u7edf\u4e00\u5bf9\u8c61\u7ba1\u7406\u533a\u53ef\u4ee5\u5148\u7b80\u5355\u7406\u89e3\u6210\u4e00\u4e2a\u7ebf\u7a0b\u5b89\u5168\u7684&nbsp;<code>Map<\/code>\uff0c\u4f8b\u5982&nbsp;<code>ConcurrentHashMap<\/code>\uff1akey \u4fdd\u5b58\u7ec4\u4ef6\u540d\u79f0\uff0cvalue \u4fdd\u5b58\u7ec4\u4ef6\u5b9e\u4f8b\u3002Spring IOC \u5bb9\u5668\u5c31\u662f\u5728\u8fd9\u4e2a\u57fa\u7840\u601d\u60f3\u4e0a\u7ee7\u7eed\u6269\u5c55\uff0c\u8fdb\u4e00\u6b65\u8d1f\u8d23\u5b9e\u4f8b\u521b\u5efa\u3001\u4f9d\u8d56\u88c5\u914d\u3001\u751f\u547d\u5468\u671f\u7ba1\u7406\u548c\u6269\u5c55\u70b9\u56de\u8c03\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010251857.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20260428010251857.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u9636\u6bb5\u56db\uff1a\u5bb9\u5668\u7528\u6620\u5c04\u5173\u7cfb\u7ef4\u62a4\u5b9e\u4f8b\"\/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u70b9\uff1a\u6211\u4eec\u4fdd\u5b58\u7684\u662f\u4ec0\u4e48\uff0c\u6211\u4eec\u53d6\u51fa\u7684\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4fdd\u5b58\u7684\u662f\u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u6240\u9700\u8981\u7684\u5b9e\u4f8b\uff0c\u6bd4\u5982adminService\u3001userService\u7b49\uff1b\u53d6\u7684\u4e5f\u662f\u8fd9\u4e9b\u5b9e\u4f8b<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-3-ioc\u63a7\u5236\u53cd\u8f6c\">&nbsp;IOC\u63a7\u5236\u53cd\u8f6c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Inverse of Control<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a7\u5236\u53cd\u8f6c\u8fd9\u4e2a\u8bcd\u8981\u62c6\u5f00\u6765\u770b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u63a7\u5236\uff1a<\/strong>\u5b9e\u4f8b\u7684\u751f\u6210\u6743<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53cd\u8f6c\uff1a<\/strong>\u7531\u5e94\u7528\u7a0b\u5e8f\u53cd\u8f6c\u7ed9Spring\u5bb9\u5668<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5bb9\u5668\uff1a<\/strong>\u751f\u6210\u5e76\u7ba1\u7406\u5b9e\u4f8b\u7684\u62bd\u8c61\u7a7a\u95f4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u83b7\u53d6\u4f9d\u8d56\u5bf9\u8c61\u88ab\u53cd\u8f6c\u4e86\uff0c\u5b83\u662f\u88ab\u52a8\u83b7\u53d6\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b63\u8f6c\u5c31\u662f\u81ea\u5df1\u53bbnew\u4e00\u4e2a\u5bf9\u8c61\uff0c\u81ea\u5df1\u83b7\u53d6\u5bf9\u8c61<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-4-di\u4f9d\u8d56\u6ce8\u5165\">DI\u4f9d\u8d56\u6ce8\u5165<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Dependency Injection<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Q1\u8c01\u4f9d\u8d56\u8c01\uff1fQ2\u4e3a\u4ec0\u4e48\u9700\u8981\u4f9d\u8d56\uff1fQ3\u8c01\u6ce8\u5165\u8c01\uff1fQ4\u6ce8\u5165\u4e86\u4ec0\u4e48\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8003\u4e0a\u9762\u7684\u95ee\u9898\uff0c\u4e00\u5b9a\u8981\u5728\u63a7\u5236\u53cd\u8f6c\u7684\u57fa\u7840\u4e0a\u53bb\u601d\u8003\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u601d\u8003\u7684\u662f\u5e94\u7528\u7a0b\u5e8f\u548cSpring\u5bb9\u5668\u4e4b\u95f4\u7684\u5173\u7cfb \ud83d\udc49 \u7ecf\u8fc7\u4e86\u63a7\u5236\u53cd\u8f6c\uff0cSpring\u5bb9\u5668\uff08IOC\u5bb9\u5668\uff09\u638c\u63e1\u4e86\u66f4\u591a\u7684\u5b9e\u4f8b\uff0c\u53d8\u5f97\u66f4\u52a0<strong>\u5bcc\u6709<\/strong>\uff0c\u800c\u5e94\u7528\u7a0b\u5e8f\u53d8\u5f97<strong>\u201c\u8d2b\u7a77\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer1 \u5e94\u7528\u7a0b\u5e8f\u4f9d\u8d56\u4e8eIoC\u5bb9\u5668\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer2 \u5e94\u7528\u7a0b\u5e8f\u9700\u8981IoC\u5bb9\u5668\u6765\u63d0\u4f9b\u5bf9\u8c61\u9700\u8981\u7684\u5916\u90e8\u8d44\u6e90\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer3 IoC\u5bb9\u5668\u6ce8\u5165\u5e94\u7528\u7a0b\u5e8f\u67d0\u4e2a\u5bf9\u8c61\uff0c\u5e94\u7528\u7a0b\u5e8f\u4f9d\u8d56\u7684\u5bf9\u8c61\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Answer4 \u6ce8\u5165\u67d0\u4e2a\u5bf9\u8c61\u6240\u9700\u8981\u7684\u5916\u90e8\u8d44\u6e90\uff08\u5305\u62ec\u5bf9\u8c61\u3001\u8d44\u6e90\u3001\u5e38\u91cf\u6570\u636e\uff09\uff1b<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-27-1024x731.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"731\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-27-1024x731.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-144\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u70b9\uff1a\u4ece\u5bb9\u5668\u4e2d\u83b7\u5f97\u5e94\u7528\u7a0b\u5e8f\u6240\u9700\u8981\u7684\u5b9e\u4f8b\uff0c\u5e76\u4e14\u7ed9\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u505a\u8d4b\u503c<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-5-spring\u7684\u4f18\u70b9\">Spring\u7684\u4f18\u70b9<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65b9\u4fbf\u89e3\u8026\uff0c\u7b80\u5316\u5f00\u53d1\uff08\u9ad8\u5185\u805a\u4f4e\u8026\u5408\uff09<\/strong><\/li>\n\n\n\n<li><strong>AOP\u7f16\u7a0b\u7684\u652f\u6301<\/strong><\/li>\n\n\n\n<li><strong>\u58f0\u660e\u5f0f \u4e8b\u52a1\u7684\u652f\u6301<\/strong><\/li>\n\n\n\n<li>\u65b9\u4fbf\u7a0b\u5e8f\u7684\u6d4b\u8bd5<\/li>\n\n\n\n<li>\u65b9\u4fbf\u96c6\u6210\u5404\u79cd\u4f18\u79c0\u6846\u67b6<\/li>\n\n\n\n<li>\u964d\u4f4eJavaEE API\u7684\u4f7f\u7528\u96be\u5ea6<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5165\u95e8\u6848\u4f8b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-1-\u601d\u8003-\u5982\u4f55\u81ea\u5df1\u7ba1\u7406\u5b9e\u4f8b\">\u5982\u4f55\u81ea\u5df1\u7ba1\u7406\u5b9e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u7ed9\u4f60\u63d0\u4f9b\u4e00\u4e2a\u7c7b\u7684\u4fe1\u606f\uff0c\u4f60\u80fd\u5426\u7ba1\u7406\u5bf9\u5e94\u7684\u5b9e\u4f8b<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-26-1024x356.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"356\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-26-1024x356.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-143\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff0c\u63d0\u4f9b\u4e00\u4e2aproperties\u914d\u7f6e\u6587\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>classlist=com.cskaoyan.demo1.service.UserServiceImpl,com.cskaoyan.demo1.service.GoodServiceImpl,com.cskaoyan.demo1.service.AdminServiceImpl<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">step1. List\\&lt;String&gt; classList;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">step2. \u904d\u5386 \u5355\u4e2a\u503c \u662f\u4e0d\u662fclass\u7684\u5168\u9650\u5b9a\u7c7b\u540d \u2192<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> Class clazz = Class.forName(\"com.cskaoyan.demo1.service.UserServiceImpl\")<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">step3. \u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u83b7\u5f97\u5b9e\u4f8b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Object instance = clazz.newInstance();<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">step4. \u653e\u5165\u5230map\u4e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Map map = new ConcurrentHashMap&lt;&gt;();\nmap.put(\"userServiceImpl\",instance);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ed3\u8bba\uff1aSpring\u6846\u67b6\u5176\u5b9e\u5c31\u662f\u901a\u8fc7\u53cd\u5c04\u6765\u521b\u5efa\u7684\u5b9e\u4f8b<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-2-\u5165\u95e8\u6848\u4f8b1-\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\">\u6848\u4f8b1\uff1a\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5f15\u5165\u4f9d\u8d56<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f15\u5165\u4f9d\u8d56 beans\u3001context\u3001aop\u3001expression\u3001core\u3001jcl 5+1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;dependencies&gt;\n  &lt;!--\u5f15\u5165\u4f9d\u8d56 beans\u3001context\u3001aop\u3001expression\u3001core\u3001jcl\u3001micrometer-observation 5+2--&gt;\n  &lt;!--io.micrometer:micrometer-observation:1.14.14\u5185\u7f6e\u7684\u53ef\u89c2\u6d4b\u6027\u57cb\u70b9--&gt;\n  &lt;!--spring-context--&gt;\n  &lt;dependency&gt;\n    &lt;groupId&gt;org.springframework&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-context&lt;\/artifactId&gt;\n    &lt;version&gt;6.2.15&lt;\/version&gt;\n  &lt;\/dependency&gt;\n  &lt;dependency&gt;\n    &lt;groupId&gt;org.junit.jupiter&lt;\/groupId&gt;\n    &lt;artifactId&gt;junit-jupiter-api&lt;\/artifactId&gt;\n    &lt;version&gt;5.10.0&lt;\/version&gt;\n    &lt;scope&gt;test&lt;\/scope&gt;\n  &lt;\/dependency&gt;\n  &lt;dependency&gt;\n    &lt;groupId&gt;org.junit.jupiter&lt;\/groupId&gt;\n    &lt;artifactId&gt;junit-jupiter-engine&lt;\/artifactId&gt;\n    &lt;version&gt;5.10.0&lt;\/version&gt;\n    &lt;scope&gt;test&lt;\/scope&gt;\n  &lt;\/dependency&gt;\n&lt;\/dependencies&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u63d0\u4f9b\u63a5\u53e3\u548c\u5b9e\u73b0\u7c7b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class UserServiceImpl implements UserService{\n    @Override\n    public void sayHello(String name) {\n        System.out.println(\"hello \" + name);\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u539f\u5148\u4f7f\u7528\u5b9e\u4f8b\u7684\u65f6\u5019\uff0c\u662f\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u751f\u6210\u7684\uff1b\u540e\u7eed\u8981\u53d8\u66f4\u4e3a\u6765\u6e90Spring\u5bb9\u5668<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><del><strong>Spring\u914d\u7f6e\u6587\u4ef6(\u5306\u5306\u8fc7\u5ba2)<\/strong><\/del><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u7f6e\u6587\u4ef6\u4e3aXml\u683c\u5f0f\u7684\u6587\u4ef6\uff0c\u9700\u8981\u5f15\u5165\u5bf9\u5e94\u7684<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[Schema\u7ea6\u675f]: https:\/\/docs.spring.io\/spring-framework\/docs\/current\/reference\/html\/core.html#xsd-schemas-context<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?xml version=\"1.0\" encoding=\"UTF-8\"?&gt;\n&lt;beans xmlns=\"http:\/\/www.springframework.org\/schema\/beans\"\n    xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n    xmlns:context=\"http:\/\/www.springframework.org\/schema\/context\"\n    xsi:schemaLocation=\"\n        http:\/\/www.springframework.org\/schema\/beans https:\/\/www.springframework.org\/schema\/beans\/spring-beans.xsd\n        http:\/\/www.springframework.org\/schema\/context https:\/\/www.springframework.org\/schema\/context\/spring-context.xsd\"&gt;\n\n    &lt;!-- bean definitions here --&gt;\n\n&lt;\/beans&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u6ce8\u518c\u7ec4\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;!--spring\u914d\u7f6e\u6587\u4ef6\u7684\u540d\u79f0\u901a\u5e38\u53ebapplication(-xxx).xml--&gt;\n&lt;!-- bean definitions here --&gt;\n&lt;!--\u63a7\u5236\u53cd\u8f6c--&gt;\n&lt;!--id\u5c5e\u6027 \ud83d\udc49 \u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u7684\u552f\u4e00\u6807\u8bc6--&gt;\n&lt;!--name\u5c5e\u6027 \ud83d\udc49 \u540d\u79f0 \ud83d\udc49 \u901a\u5e38\u7701\u7565\u4e0d\u5199--&gt;\n&lt;!--class \u5168\u7c7b\u540d \ud83d\udc49 \u5b9e\u73b0\u7c7b\u7684\u5168\u7c7b\u540d--&gt;\n&lt;!--\u7ec4\u4ef6 \u6ce8\u518c \ud83d\udc49 \u5c06\u5b9e\u4f8b\u4ea4\u7ed9spring\u7ba1\u7406\u7684\u8fc7\u7a0b\u6211\u4eec\u79f0\u4e4b\u4e3a\u6ce8\u518c--&gt;\n&lt;bean id=\"userService\" class=\"com.cskaoyan.demo1.service.UserServiceImpl\"\/&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\uff0c\u6267\u884c\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20230411155445190.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20230411155445190.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\"\/><\/div><figcaption class=\"wp-element-caption\">\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\uff1a\u53d6\u51fa\u7ec4\u4ef6\u76843\u79cd\u65b9\u5f0f\uff01<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n     * \u5411\u5bb9\u5668\u4e2d\u6ce8\u518c\u7ec4\u4ef6\uff0c\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\n     *\/\n@Test\npublic void testCase1() {\n  \/\/ Spring\u5bb9\u5668\n  \/\/ \u521d\u59cb\u5316\u5bb9\u5668\uff0c\u5e76\u4e14\u6ce8\u518c\u7ec4\u4ef6\n  ApplicationContext applicationContext = new ClassPathXmlApplicationContext(\"application.xml\");\n  \/\/ \u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\n  \/\/ \u6309\u7167\u7ec4\u4ef6\u7684id(name)\u53d6\u51fa\u7ec4\u4ef6\n  UserService userService1 = (UserService) applicationContext.getBean(\"userService\");\n  userService1.sayHello(\"spring\");\n  \/\/ \u53ef\u4ee5\u5199\u63a5\u53e3\u7684class\uff0c\u4e5f\u53ef\u4ee5\u5199\u5b9e\u73b0\u7c7b\u7684class\uff0c\u5efa\u8bae\u5199\u63a5\u53e3\n  \/\/ \u5982\u679c\u5bb9\u5668\u4e2d\u67d0\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u53ea\u6709\u4e00\u4e2a\uff0c\u53ef\u4ee5\u6309\u7167\u7c7b\u578b\u53d6\u51fa\n  UserService userService2 = applicationContext.getBean(UserService.class);\n  \/\/ id + \u7c7b\u578b\n  UserService userService3 = applicationContext.getBean(\"userService\", UserService.class);\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540e\u7eed\u7edd\u5927\u591a\u6570\u60c5\u51b5\u662f\u6309\u7167\u7c7b\u578b\u53d6\u51fa\u7ec4\u4ef6\uff0c\u56e0\u4e3a\u7edd\u5927\u591a\u6570\u60c5\u51b5\u5bb9\u5668\u4e2d\u67d0\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u53ea\u6709\u4e00\u4e2a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-3-\u5165\u95e8\u6848\u4f8b2-\u7ef4\u62a4\u7ec4\u4ef6\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\">\u6848\u4f8b2\uff1a\u7ef4\u62a4\u7ec4\u4ef6\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ef4\u62a4\u7ec4\u4ef6\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u5728\u5bb9\u5668\u4e2d\u6ce8\u518cdao\u5c42\u548cservice\u5c42\u7ec4\u4ef6\uff0c\u5e76\u4e14service\u5c42\u7684\u7ec4\u4ef6\u4f9d\u8d56\u4e8edao\u5c42\u7ec4\u4ef6\uff08\u8c01\u9700\u8981\u8c01\u5c31\u662f\u8c01\u4f9d\u8d56\u8c01\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>service\u7c7b\u548cdao\u7c7b<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u5728service\u7c7b\u4e2d\u589e\u52a0dao\u7c7b\u6210\u5458\u53d8\u91cf\u7ef4\u62a4\u4f9d\u8d56\u5173\u7cfb<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class UserServiceImpl implements UserService{\n    \/\/\u4e3b\u52a8 \u2192 \u63a7\u5236\n    \/\/UserDao userDao = new UserDaoImpl();\n    UserDao userDao;\n\n    public void setUserDao(UserDao userDao) {\n        this.userDao = userDao;\n    }\n\n    @Override\n    public void serviceSayHello() {\n        System.out.println(\"service\u5c42\u7684sayHello\");\n        userDao.sayHello();\n    }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>public class UserDaoImpl implements UserDao{\n    @Override\n    public void sayHello() {\n        System.out.println(\"hello xiaowu\");\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ef4\u62a4\u7ec4\u4ef6\u4e4b\u95f4\u4f9d\u8d56\u5173\u7cfb<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7property\u6807\u7b7e\u7684ref\u5c5e\u6027\u7ef4\u62a4\u7ec4\u4ef6\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;bean id=\"userService\" class=\"com.cskaoyan.demo1.service.UserServiceImpl\"&gt;\n  &lt;!--\u6ce8\u518cUserServiceImpl\u8fd9\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u7684\u65f6\u5019\uff0c\u5b9e\u4f8b\u5316\u7684\u8fc7\u7a0b\u4f1a\u6267\u884cset\u65b9\u6cd5(setUserDao)\n            \u8fd9\u4e2aset\u65b9\u6cd5\u7684\u5f62\u53c2\u662fUserDao\u7c7b\u578b\u7684\u5b9e\u4f8b\uff0c\u901a\u8fc7id\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u4f5c\u4e3a\u5f62\u53c2\n            this.userDao = userDao; \u7ed9userServiceImpl\u8fd9\u4e2a\u7ec4\u4ef6\u7684userDao\u6210\u5458\u53d8\u91cf\u505a\u4e86\u8d4b\u503c\n            \u2192 \u4f9d\u8d56\u6ce8\u5165\n        --&gt;\n  &lt;property name=\"userDao\" ref=\"userDao\"\/&gt;\n&lt;\/bean&gt;\n&lt;bean id=\"userDao\" class=\"com.cskaoyan.demo1.dao.UserDaoImpl\"\/&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5355\u5143\u6d4b\u8bd5<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f4\u63a5\u4ece\u5bb9\u5668\u4e2d\u53d6\u51faservice\u7ec4\u4ef6\uff0c\u6267\u884c\u5bf9\u5e94\u7684\u65b9\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Test\npublic void testCase2() {\n  ApplicationContext applicationContext = new ClassPathXmlApplicationContext(\"application.xml\");\n  UserDao userDao = applicationContext.getBean(UserDao.class);\n  UserService userService = applicationContext.getBean(UserService.class);\n  \/\/ \u76f4\u63a5\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7684userDao\u5b9e\u4f8b\u548c\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7684userService\u5b9e\u4f8b\u4e2d\u7684userDao\u6210\u5458\u53d8\u91cf\u662f\u5426\u662f\u540c\u4e00\u4e2a\n  \/*UserServiceImpl userService = applicationContext.getBean(UserServiceImpl.class);\n\n        userService.setUserDao(userDao);*\/\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f:\u4e00\u5b9a\u662f\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u5bf9\u5e94\u7684\u7ec4\u4ef6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u601d\u8003\uff1a\u53f3\u4fa7\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684userDaoImpl\u7684\u5b9e\u4f8b\u662f\u5426\u662f\u540c\u4e00\u4e2a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/instanceisone.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/instanceisone.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u5bb9\u5668\u4e2d\u7684\u5b9e\u4f8b\u5f15\u7528\u5173\u7cfb\"\/><\/div><figcaption class=\"wp-element-caption\">\u5bb9\u5668\u4e2d\u7684\u5b9e\u4f8b\u5f15\u7528\u5173\u7cfb<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20230411175122011.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20230411175122011.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\u5165\u95e8\u6848\u4f8b2\u5b9e\u4f8b\u5173\u7cfb\"\/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">&nbsp;\u6ce8\u89e3\u9a71\u52a8\u5f00\u53d1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4f7f\u7528Spring\u6ce8\u89e3\u7684\u65f6\u5019\uff0c\u6211\u4eec\u6309\u7167\u529f\u80fd\u6765\u8fdb\u884c\u5212\u5206<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">1\u3001 \u6807\u8bb0 isAnnotationPresent<br>2\u3001 \u63d0\u4f9b\u503c getDeclaredAnnotation(xxx.class).\u65b9\u6cd5<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u7684\u6ce8\u89e3\u6709\u610f\u4e49\u7684\u524d\u63d0\u662f\u4f7f\u7528Spring\u6280\u672f \u2192 \u8981\u6709\u5bb9\u5668 ApplicationContext<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-1-\u914d\u7f6e\u7c7b\">\u914d\u7f6e\u7c7b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u914d\u7f6e\u7c7b\uff0c\u627f\u62c5\u505a\u901a\u7528\u914d\u7f6e\u7684\u529f\u80fd\uff0c\u540c\u65f6\u5728\u914d\u7f6e\u7c7b\u4e2d\u53ef\u4ee5\u7ec4\u4ef6\u6ce8\u518c<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6211\u4eec\u5728\u7c7b\u5b9a\u4e49\u4e0a\u589e\u52a0\u4e00\u4e9b\u529f\u80fd\u6027\u7684\u6ce8\u89e3\uff0c\u589e\u52a0\u4e00\u4e9b\u901a\u7528\u6027\u7684\u914d\u7f6e<\/li>\n\n\n\n<li>\u6211\u4eec\u5728\u7c7b\u4e2d\u7684\u65b9\u6cd5\u91cc\u6ce8\u518c\u7ec4\u4ef6<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u914d\u7f6e\u7c7b\uff0c\u9700\u8981\u5728\u7c7b\u4e0a\u589e\u52a0\u4e00\u4e2a@Configuration\u6ce8\u89e3<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u8fd9\u91cc\u589e\u52a0\u529f\u80fd\u6027\u7684\u6ce8\u89e3\n@Configuration\npublic class SpringConfiguration {\n    \/\/ \u7c7b\u4e2d\u7684\u65b9\u6cd5\u505a\u7ec4\u4ef6\u7684\u6ce8\u518c\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-2-\u7ec4\u4ef6\u6ce8\u518c\u529f\u80fd-ioc\">\u7ec4\u4ef6\u6ce8\u518c\u529f\u80fd\uff08IOC\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7c7b\u76f4\u63a5\u6ce8\u518c<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ec4\u4ef6\u6ce8\u518c\u529f\u80fd\u9996\u5148\u8981\u6253\u5f00\u626b\u63cf\u5f00\u5173<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u8fd9\u91cc\u589e\u52a0\u529f\u80fd\u6027\u7684\u6ce8\u89e3\n@Configuration\n@ComponentScan(\"com.cskaoyan.demo1\")\npublic class SpringConfiguration {\n    \/\/ \u7c7b\u4e2d\u7684\u65b9\u6cd5\u505a\u7ec4\u4ef6\u7684\u6ce8\u518c\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ec4\u4ef6\u6ce8\u518c\u529f\u80fd\u7684\u6ce8\u89e3@Component<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u4e86<strong>@Component<\/strong>\u6ce8\u89e3\uff0c\u8fd8\u6709\u4ec0\u4e48\u7c7b\u4f3c\u7684\u6ce8\u89e3<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Target(ElementType.TYPE)\/\/ \u8be5\u6ce8\u89e3\u5199\u5728\u7c7b\u4e0a\n@Retention(RetentionPolicy.RUNTIME)\npublic @interface Component {\n\n   \/**\n    * The value may indicate a suggestion for a logical component name,\n    * to be turned into a Spring bean in case of an autodetected component.\n    * @return the suggested component name, if any (or empty String otherwise)\n    *\/\n   String value() default \"\";\n\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>@Service \u2192 \u901a\u5e38\u662fService\u5c42\u7684\u7ec4\u4ef6\u4f7f\u7528\u7684\u6ce8\u89e3\uff0cService\u5c42\u7ec4\u4ef6\u4e5f\u80fd\u4f7f\u7528@Component<\/li>\n\n\n\n<li>@Repository \u2192 \u901a\u5e38\u662fDao\u5c42\u7684\u7ec4\u4ef6\u4f7f\u7528@Repository\u6ce8\u89e3\uff0cdao\u5c42\u7ec4\u4ef6\u4e5f\u80fd\u4f7f\u7528@Component<\/li>\n\n\n\n<li>@Configuration \u2192 \u914d\u7f6e\u7c7b\u7ec4\u4ef6<\/li>\n\n\n\n<li>@Controller\uff08SpringMVC\u9636\u6bb5\uff09<\/li>\n\n\n\n<li>\u7b49<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">@Service\u3001@Repository\u3001@Controller\u3001@Configuration\uff0c\u8fd9\u4e9b\u6ce8\u89e3\u7684ElementType\u90fd\u662fTYPE\uff0c\u4e5f\u5c31\u662f\u8fd9\u4e9b\u6ce8\u89e3\u90fd\u662f\u8981\u5199\u5728\u7c7b\u5b9a\u4e49\u4e0a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ec4\u4ef6id\u9ed8\u8ba4\u4e3a\u7c7b\u540d\u7684\u9996\u5b57\u6bcd\u5c0f\u5199\uff0c\u53e6\u5916\u4e5f\u53ef\u4ee5\u4f7f\u7528\u6ce8\u89e3\u7684value\u5c5e\u6027\u6765\u6307\u5b9a\u7ec4\u4ef6id<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/@Component\n\/\/@Repository(\"userDao\")  \/\/\u7ec4\u4ef6id\u4e3auserDao\n@Repository               \/\/\u7ec4\u4ef6id\u4e3auserDaoImpl\npublic class UserDaoImpl implements UserDao{\n}\n\/**\n * \u589e\u52a0\u5176value\u5c5e\u6027\uff0cvalue\u5c5e\u6027\u503c\u5c31\u662fid\n * \u5982\u679c\u6ca1\u6709\u589e\u52a0value\u5c5e\u6027\uff0cid\u9ed8\u8ba4\u503c\u662f\u7c7b\u540d\u7684\u9996\u5b57\u6bcd\u5c0f\u5199\n * @author stone\n * @date 2023\/04\/11 15:11\n *\/\n\/\/@Component \/\/ \u7ec4\u4ef6id\u7684\u9ed8\u8ba4\u503c\u662fgoodsServiceImpl\n@Component(\"goodsService\") \/\/ \u4f7f\u7528value\u5c5e\u6027\u503c\u6307\u5b9a\u4e86\u7ec4\u4ef6id\u4e3agoodsService\npublic class GoodServiceImpl implements GoodsService{\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u8003\uff1a\u4e3a\u4ec0\u4e48\u6211\u4eec\u63d0\u4f9b\u4e00\u4e2a\u626b\u63cf\u5305\u76ee\u5f55\uff08@ComponentScan(&#8220;\u5305\u76ee\u5f55&#8221;)\uff09\uff0c\u7136\u540e\u5728\u5305\u76ee\u5f55\u4e0b\u7684\u7c7b\u4e2d\u4f7f\u7528\u6ce8\u89e3\u5c31\u53ef\u4ee5\u6ce8\u518c\u7ec4\u4ef6\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u662f\u6309\u7167\u4ec0\u4e48\u601d\u8def\u6765\u505a\u7684\uff1f<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u63d0\u4f9b\u5305\u76ee\u5f55\uff0c\u80fd\u5426\u83b7\u5f97\u8fd9\u4e2a\u5305\u4ee5\u53ca\u8fd9\u4e2a\u5305\u7684\u5b50\u5305\u4e0b\u7684\u6240\u6709\u7684\u7c7b\u7684\u5168\u9650\u5b9a\u7c7b\u540d<\/li>\n\n\n\n<li>\u901a\u8fc7\u5168\u9650\u5b9a\u7c7b\u540d\uff0c\u901a\u8fc7\u53cd\u5c04\u7684\u65b9\u5f0f\u83b7\u5f97\u5bf9\u5e94\u7684class \u2192 Class.forName()<\/li>\n\n\n\n<li>List\\&lt;Class> classList = \u901a\u8fc7\u4e0a\u9762\u7684\u8fc7\u7a0b\u83b7\u5f97<\/li>\n\n\n\n<li>\u904d\u5386\u83b7\u5f97\u5176\u4e2d\u7684\u5355\u4e2aclass\u5462<\/li>\n\n\n\n<li>class.isAnnotationPresent(\u6ce8\u89e3\u7684class) \u2192 \u5224\u65ad\u8fd9\u4e2a\u7c7b\u4e0a\u662f\u5426\u6709\u6ce8\u89e3<\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code>@SneakyThrows\n@Test\npublic void testIsAnnotationPresent() {\n    Map&lt;String,Object&gt; map = new ConcurrentHashMap&lt;&gt;();\n    List&lt;Class&lt;?&gt;&gt; classList = Arrays.asList(UserServiceImpl.class, GoodServiceImpl.class, UserServiceImpl.class);\n    for (Class&lt;?&gt; singleClass : classList) {\n        if (singleClass.isAnnotationPresent(Component.class)) {\n            Object instance = singleClass.newInstance();\n            String key = singleClass.getName();\n            map.put(key, instance);\n        }\n    }\n    System.out.println(map);\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u914d\u7f6e\u7c7b\u6ce8\u518c\uff08JavaConfig\uff09<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Configuration\n@ComponentScan(\"com.cskaoyan.demo2\")\npublic class ApplicationConfiguration {\n\n    \/\/ \u5728\u914d\u7f6e\u7c7b\u4e2d\u6ce8\u518cAdminServiceImpl\u7ec4\u4ef6\n    \/\/ \u5728\u914d\u7f6e\u7c7b\u4e2d\u5199\u7684\u662f\u65b9\u6cd5 \u2192 \u63d0\u4f9b\u4e00\u4e2a\u8fd4\u56de\u503c\u4e3aAdminServiceImpl\u7c7b\u578b\u7684\u5b9e\u4f8b\n    \/\/ \u5e94\u7528\u7a0b\u5e8f\u542f\u52a8\u7684\u65f6\u5019 \u2192 \u52a0\u8f7d\u914d\u7f6e\u7c7b \u2192 \u6267\u884c\u914d\u7f6e\u7c7b\u4e2d\u7684\u65b9\u6cd5(@Bean) \u2192 \u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\n    @Bean(\"wdAdminService\")\n    public AdminService adminService() {\n        AdminService adminService = new AdminServiceImpl();\n        System.out.println(adminService);\n        return adminService;\n    }\n\n    \/\/ \u5bb9\u5668\u4e2duserService\u7c7b\u578b\u7684\u7ec4\u4ef6\u6709\u51e0\u4e2a\n    \/\/ \u7ec4\u4ef6id\u9ed8\u8ba4\u503c\u662f\u65b9\u6cd5\u540d\uff1b\u53ef\u4ee5\u4f7f\u7528@Bean\u7684value\u5c5e\u6027\u6307\u5b9a\n    \/\/ @Bean\u5bf9\u5e94\u7684\u65b9\u6cd5\u7684\u5f62\u53c2\uff0c\u9ed8\u8ba4\u662f\u6309\u7167\u7c7b\u578b\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\n    \/\/ \u5982\u679c\u5f62\u53c2\u8fd9\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u4e0d\u6b62\u4e00\u4e2a\uff0c\u53ef\u4ee5\u4f7f\u7528@Qualifier\u6307\u5b9a\u7ec4\u4ef6\n    @Bean\n    public UserService userService(@Qualifier(\"userDaoImpl\") UserDao userDao) {\n        UserServiceImpl userService = new UserServiceImpl();\n        \/\/ \u53ef\u5426\u5728\u7ec4\u4ef6\u6ce8\u518c\u8fc7\u7a0b\u4e2d\uff0c\u4ece\u5bb9\u5668\u4e2d\u53d6\u51faUserDao\u7684\u5b9e\u4f8b\uff0c\u7ed9\u8fd9\u4e2a\u7ec4\u4ef6\u7684\u6210\u5458\u53d8\u91cf\u8d4b\u503c\u5462\n        userService.setUserDao(userDao);\n        return userService;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u914d\u7f6e\u7c7b\u4e2d\u5b8c\u6210\u5bf9\u5e94\u7684<strong>\u7ec4\u4ef6\u6ce8\u518c<\/strong>\u4ee5\u53ca<strong>\u76f8\u5173\u914d\u7f6e<\/strong>\uff0c\u914d\u7f6e\u7c7b\u7684\u6838\u5fc3\u5c31\u662f\u63d0\u4f9b\u5bf9\u5e94\u7684\u4fe1\u606f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">JavaConfig\u7684\u76ee\u6807\u662f\u5e72\u6389\u914d\u7f6e\u6587\u4ef6\uff0cJavaConfig\u4e5f\u662fSpringBoot<strong>\u63a8\u8350<\/strong>\u4f7f\u7528\u7684\u914d\u7f6e\u65b9\u5f0f\uff0cSpringBoot\u4e2d\u4e0d\u518d\u4f7f\u7528Spring\u7684xml\u914d\u7f6e\u6587\u4ef6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u914d\u7f6e\u7c7b\u4e2d\uff0c\u4f7f\u7528\u6ce8\u518c\u529f\u80fd\u7684\u6ce8\u89e3<strong>@Bean<\/strong>&nbsp;\u4ee5\u53ca<strong>\u65b9\u6cd5<\/strong>\u6765\u5b8c\u6210\u7ec4\u4ef6\u6ce8\u518c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})\n@Retention(RetentionPolicy.RUNTIME)\n@Documented\npublic @interface Bean {}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u6ce8\u89e3\u589e\u52a0\u5728\u65b9\u6cd5\u4e0a\uff0c\u5e76\u4e14\u53ef\u4ee5\u548c\u5176\u4ed6\u6ce8\u89e3\u5171\u5b58<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd9\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u8981\u901a\u8fc7\u8fd9\u4e2a\u65b9\u6cd5\u6ce8\u518c\u4e00\u4e2aDruidDataSource\u7ec4\u4ef6\n * @return \u5e94\u8be5\u8fd4\u56de\u7684\u662f\u4e00\u4e2aDruidDataSource\u7684\u5b9e\u4f8b\uff0c\u8fd9\u4e2a\u8fd4\u56de\u503c\u4f1a\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\n * \u8fd4\u56de\u503c\u7684\u5b9a\u4e49\uff1a\u53ef\u4ee5\u5199\u5b9e\u73b0\u7c7b\uff0c\u4e5f\u53ef\u4ee5\u5199\u63a5\u53e3\uff1b\u63d0\u4f9b\u7ec4\u4ef6\u7684\u7c7b\u578b\u4fe1\u606f\u7ed9\u5230\u5bb9\u5668\u4e2d\uff1b\u5efa\u8bae\u5199\u63a5\u53e3\n * SE\u7684\u4ee3\u7801\u98ce\u683c\u6765\u63d0\u4f9b\u5c5e\u6027\u503c\u5c31\u53ef\u4ee5\n * \u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u6ce8\u518c\u7684\u7ec4\u4ef6id\uff1a1\u3001\u9ed8\u8ba4\u503c\u662f\u65b9\u6cd5\u540d\uff1b2\u3001@Bean\u6ce8\u89e3\u7684value\u5c5e\u6027\u53ef\u4ee5\u6307\u5b9a\u7ec4\u4ef6id\n *\/\n@Bean\npublic DataSource dataSource(){\n    DruidDataSource dataSource = new DruidDataSource();\n    dataSource.setDriverClassName(\"com.mysql.jdbc.Driver\");\n    dataSource.setUrl(\"jdbc:mysql:\/\/localhost:3306\/cskaoyan_db?useUnicode=true&amp;characterEncoding=utf-8\");\n    dataSource.setUsername(\"root\");\n    dataSource.setPassword(\"123456\");\n    return dataSource;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u60f3\u8981\u901a\u8fc7@Bean\u6ce8\u518cComponent1\u8fd9\u4e2a\u7ec4\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Component1 {\n\n    DataSource dataSource;\n\n    public DataSource getDataSource() {\n        return dataSource;\n    }\n\n    public void setDataSource(DataSource dataSource) {\n        this.dataSource = dataSource;\n    }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * Component1\u8fd9\u4e2a\u7c7b\u4e2d\u6709\u4e00\u4e2a\u6210\u5458\u53d8\u91cf \u53ebdataSource\u9700\u8981\u7684\u662f\u4e00\u4e2aDataSource\u7c7b\u578b\u7684\u7ec4\u4ef6\n * \u8bbe\u7f6e\u7684\u8fd9\u4e2aDataSource\u60f3\u8981\u4ece\u5bb9\u5668\u4e2d\u6765\u83b7\u5f97\n * \u5f62\u53c2\uff1a\u9ed8\u8ba4\u662f\u6309\u7167\u7c7b\u578b\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\u7684  ac.getBean(Class)\n * @return\n *\/\n@Bean\npublic Component1 component1(DataSource dataSource) {\n    Component1 component1 = new Component1();\n    component1.setDataSource(dataSource);\n    return component1;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u989d\u5916\u589e\u52a0\u4e00\u4e2aDataSource\u7ec4\u4ef6\u7684\u8bdd\uff0c\u5bb9\u5668\u4e2dDataSource\u7c7b\u578b\u7684\u7ec4\u4ef6\u4e0d\u6b62\u4e00\u4e2a\uff0c\u901a\u8fc7\u5f62\u53c2\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\u9700\u8981\u6307\u5b9a\u7ec4\u4ef6id<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Bean\npublic DataSource dataSource2(){\n    DruidDataSource dataSource = new DruidDataSource();\n    dataSource.setDriverClassName(\"com.mysql.jdbc.Driver\");\n    dataSource.setUrl(\"jdbc:mysql:\/\/localhost:3306\/cskaoyan_db2?useUnicode=true&amp;characterEncoding=utf-8\");\n    dataSource.setUsername(\"root\");\n    dataSource.setPassword(\"123456\");\n    return dataSource;\n}\n\n\/**\n * Component1\u8fd9\u4e2a\u7c7b\u4e2d\u6709\u4e00\u4e2a\u6210\u5458\u53d8\u91cf \u53ebdataSource\u9700\u8981\u7684\u662f\u4e00\u4e2aDataSource\u7c7b\u578b\u7684\u7ec4\u4ef6\n * \u8bbe\u7f6e\u7684\u8fd9\u4e2aDataSource\u60f3\u8981\u4ece\u5bb9\u5668\u4e2d\u6765\u83b7\u5f97\n * \u5f62\u53c2\uff1a\u9ed8\u8ba4\u662f\u6309\u7167\u7c7b\u578b\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\u7684  ac.getBean(Class)\n * \u5982\u679c\u5f62\u53c2\u6240\u9700\u7684\u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u4e0d\u6b62\u4e00\u4e2a\uff0c\u9700\u8981\u989d\u5916\u6307\u5b9a\u7ec4\u4ef6id\u7684\u4fe1\u606f \u2192 @Qualifier \u7684value\u5c5e\u6027\u6307\u5b9a\u7ec4\u4ef6id\n * \u5f62\u53c2\u7684\u540d\u79f0\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u7ec4\u4ef6\u7684id\uff0c\u4f46\u662f\u6211\u4eec\u66f4\u5efa\u8bae\u4f7f\u7528@Qualifier \uff0c\u66f4\u76f4\u89c2\u4e00\u4e9b\n * @return\n *\/\n@Bean\npublic Component1 component1(@Qualifier(\"dataSource2\") DataSource dataSource) {\n    Component1 component1 = new Component1();\n    component1.setDataSource(dataSource);\n    return component1;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">@Bean<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd4\u56de\u503c\u7c7b\u578b\u3001\u65b9\u6cd5\u540d\u3001\u5f62\u53c2\u3001\u8fd4\u56de\u503c\u3001@Bean\u6ce8\u89e3\u7684value\u5c5e\u6027<\/strong>&nbsp;\u5404\u81ea\u7684\u542b\u4e49\u5927\u5bb6\u9700\u8981\u5173\u6ce8<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-3-\u7ec4\u4ef6\u6ce8\u5165\u529f\u80fd-di\">\u7ec4\u4ef6\u6ce8\u5165\u529f\u80fd\uff08DI\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\uff1a\u8981\u6c42\u662f\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\uff0c\u624d\u80fd\u591f\u4f7f\u7528\u6ce8\u5165\u529f\u80fd\u7684\u6ce8\u89e3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>JavaConfig\u7684@Bean<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b9\u6cd5\u7684\u5f62\u53c2\uff0c\u5c31\u662f\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7684\u7ec4\u4ef6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6784\u9020\u5668\u6ce8\u5165<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u7c7b\u4e2d\u6ca1\u6709\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u7684\u8bdd\uff0c\u5982\u679c\u8fd9\u4e2a\u7c7b\u4e0a\u6709\u7ec4\u4ef6\u6ce8\u518c\u529f\u80fd\u7684\u6ce8\u89e3\uff0c\u5b83\u4f1a\u4f7f\u7528\u6709\u53c2\u6784\u9020\u65b9\u6cd5\u6765\u5b8c\u6210\u5b9e\u4f8b\u5316\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u53c2\u6784\u9020\u65b9\u6cd5\u7684\u5f62\u53c2\u4f1a\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class Component2 {\n    DataSource dataSource;\n\n    public Component2(DataSource dataSource) {\n        this.dataSource = dataSource;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Component2\u4e2d\u6ca1\u6709\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u5c31\u4f1a\u4f7f\u7528\u6709\u53c2\u6784\u9020\u65b9\u6cd5\u6765\u5b8c\u6210\u5b9e\u4f8b\u5316<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ed8\u8ba4\u662f<strong>\u6309\u7167\u7c7b\u578b<\/strong>\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c<strong>\u8fd9\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u4e0d\u6b62\u4e00\u4e2a<\/strong>\uff0c\u4f1a\u51fa\u73b0\u00a0<code>NoUniqueBeanDefinitionException<\/code><\/li>\n\n\n\n<li>\u53ef\u4ee5\u4f7f\u7528\u00a0<strong>@Qualifier \u6307\u5b9a\u7ec4\u4ef6 id<\/strong>\uff08<del>\u5f62\u53c2\u540d\u79f0\u4e5f\u53ef\u4ee5\u4f46\u4e0d\u5efa\u8bae<\/del>\uff09<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class Component2 {\n    DataSource dataSource;\n\n    public Component2(@Qualifier(\"dataSource1\") DataSource dataSource) {\n        this.dataSource = dataSource;\n    }\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5176\u4e2d\u7684\u5e38\u91cf\u503c\u53ef\u4ee5\u901a\u8fc7@Value\u6ce8\u89e3\u6765\u63d0\u4f9b<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>public UserServiceImpl(UserDao userDao, @Value(\"zhangsan\") String name) {\n    this.userDao = userDao;\n    this.name = name;\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u6709\u591a\u4e2a\u6709\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u9700\u8981\u6307\u5b9a\u6784\u9020\u65b9\u6cd5<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>@Service\npublic class UserServiceImpl implements UserService {\n    UserDao userDao;\n    String name;\n\n    public UserServiceImpl(UserDao userDao, @Value(\"zhangsan\") String name) {\n        this.userDao = userDao;\n        this.name = name;\n    }\n\n    @Autowired\n    public UserServiceImpl(UserDao userDao) {\n        this.userDao = userDao;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u573a\u666f\uff1a\u5b9e\u9645\u6211\u4eec\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u5f88\u5c11\u4f7f\u7528\u6709\u53c2\u6784\u9020\u5668\u6ce8\u5165\uff0c\u6210\u5458\u53d8\u91cf\u53d8\u5316\u662f\u6bd4\u8f83\u5feb\uff0c\u5982\u679c\u8981\u4f7f\u7528\u6709\u53c2\u6784\u9020\u5668\u6ce8\u5165\uff0c\u610f\u5473\u7740\u8981\u7ecf\u5e38\u4fee\u6539\u4e2d\u5408\u683c\u6709\u53c2\u6784\u9020\u5668\uff0c\u6bd4\u8f83\u7e41\u7410<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u540e\u7eedSpringBoot\u4e2d\u4f7f\u7528\u7684\u6bd4\u8f83\u591a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65b9\u6cd5\u6ce8\u5165<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u662f\u7ec4\u4ef6\u4e2d\u7684\u4efb\u610f\u65b9\u6cd5\uff0c\u4f46\u662f<strong>\u901a\u5e38\u8fd9\u6837\u7684\u65b9\u6cd5\u6211\u4eec\u7528\u7684\u662fset\u65b9\u6cd5<\/strong>\uff0c<strong>\u5728\u65b9\u6cd5\u4e0a\u589e\u52a0@Autowired\u6ce8\u89e3<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class Component3 {\n    DataSource dataSource;\n\n    \/\/ \u9ed8\u8ba4\u8fd9\u4e2a\u65b9\u6cd5\u5e76\u4e0d\u4f1a\u81ea\u52a8\u6267\u884c\n    \/\/ \u5982\u679c\u6211\u4eec\u5728\u4e0a\u9762\u589e\u52a0\u4e86@Autowired \u6ce8\u89e3\u7684\u8bdd\uff0c\u5728\u751f\u547d\u5468\u671f\u8bbe\u7f6e\u5c5e\u6027\u503c\u7684\u8fc7\u7a0b\u4e2d\u4f1a\u81ea\u52a8\u6267\u884c\n    \/\/ \u5f62\u53c2\u9ed8\u8ba4\u6309\u7167\u7c7b\u578b\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa;\u5982\u679c\u8981\u6307\u5b9a\u7ec4\u4ef6id\uff0c\u8fd8\u662f@Qualifier\n    @Autowired\n    public void setDataSource(@Qualifier(\"dataSource2\") DataSource dataSource) {\n        this.dataSource = dataSource;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\uff08set\uff09\u65b9\u6cd5\u8fd9\u79cd\u5f62\u5f0f\u662fSpring\u6846\u67b6\u5efa\u8bae\u4f7f\u7528\u7684\u65b9\u5f0f\uff0c\u4f46\u5176\u5b9e\u7edd\u5927\u90e8\u5206\u7a0b\u5e8f\u5458\u7528\u7684\u90fd\u4e0d\u662f\u8fd9\u79cd\u65b9\u5f0f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6210\u5458\u53d8\u91cf\u6ce8\u5165<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u5165\u529f\u80fd\u7684\u6ce8\u89e3\u4f7f\u7528\u8fd9\u4e09\u7ec4\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>@Autowired<\/strong><\/li>\n\n\n\n<li><strong>@Autowired + @Qualifier<\/strong><\/li>\n\n\n\n<li><strong>@Resource<\/strong><\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bb9\u5668\u4e2d\u6ce8\u518c\u4e86\u8fd9\u4e9b\u7c7b\u578b\u7684\u7ec4\u4ef6\uff0cOrderDao\u7c7b\u578b\u7684\u7ec4\u4ef6\uff08orderDaoImpl\uff09\u3001UserDao\u7c7b\u578b\u7684\u7ec4\u4ef6userDaoImpl1\u548cuserDaoImpl2<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Repository\npublic class OrderDaoImpl implements OrderDao{\n}\n@Repository\npublic class UserDaoImpl1 implements UserDao{\n}\n@Repository\npublic class UserDaoImpl2 implements UserDao{\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7684\u5bf9\u5e94\u7684\u7ec4\u4ef6\uff0c\u6267\u884c\u6ce8\u5165\uff0c\u8981\u6ce8\u610f\uff0c\u8981\u6c42\u662f\u5728\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\u91cc\u6ce8\u5165<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u8981\u4f7f\u7528\u6ce8\u5165\u529f\u80fd\u6ce8\u89e3\uff0c\u4e00\u5b9a\u8981\u4fdd\u8bc1\u5f53\u524d\u7c7b\u662f\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\n *\/\n@Service\npublic class UserServiceImpl implements UserService{\n    @Autowired \/\/\u5bb9\u5668\u4e2d\u8be5\u7c7b\u578b\u7684\u7ec4\u4ef6\u53ea\u6709\u4e00\u4e2a\n    OrderDao orderDao;\n    @Autowired \/\/\u4f7f\u7528@Qualifier\u6ce8\u89e3\u6307\u5b9a\u7ec4\u4ef6id\n    @Qualifier(\"userDaoImpl1\")\n    UserDao userDao1;\n    @Resource(name = \"userDaoImpl2\") \/\/\u9ed8\u8ba4\u662f\u6309\u7167\u7ec4\u4ef6\u7684\u7c7b\u578b\u53bb\u6ce8\u5165\uff0c\u4f7f\u7528name\u5c5e\u6027\u6307\u5b9a\u7ec4\u4ef6id\n    UserDao userDao2;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5f00\u53d1\u4e1a\u52a1\u4ee3\u7801\u8fc7\u7a0b\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u5f0f\u53ea\u4f7f\u7528\u4e00\u4e2a@Autowired \uff1a\u7edd\u5927\u90e8\u5206\u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u8fd9\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u53ea\u6709\u4e00\u4e2a<\/strong><\/li>\n\n\n\n<li><strong>\u8981\u5728\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\u4e2d\u4f7f\u7528\u8fd9\u4e9b\u6ce8\u89e3\uff0c\u4f7f\u7528\u6ce8\u89e3\u7684\u8bdd\uff0c\u6240\u5904\u7684\u7c7b\u4e0a\u8981\u6709\u7ec4\u4ef6\u6ce8\u518c\u529f\u80fd\u7684\u6ce8\u89e3\uff0c\u4e14\u5904\u4e8e\u626b\u63cf\u5305\u76ee\u5f55<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-4-spring\u7684\u5355\u5143\u6d4b\u8bd5\">Spring\u7684\u5355\u5143\u6d4b\u8bd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u7684\u662f\u628a\u5355\u5143\u6d4b\u8bd5\u7c7b\u5f53\u505a\u662f\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u76f4\u63a5\u518d\u5355\u5143\u6d4b\u8bd5\u7c7b\u4e2d\u76f4\u63a5\u53bb\u505a\u6ce8\u5165(<strong>\u4e5f\u5c31\u662f\u76f4\u63a5\u4f7f\u7528\u6ce8\u89e3<\/strong>)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f15\u5165spring-test\u4f9d\u8d56\uff08\u548c\u524d\u9762\u4f7f\u7528\u7684Spring\u4fdd\u8bc1\u662f\u540c\u4e00\u4e2a\u7248\u672c\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;dependency&gt;\n  &lt;groupId&gt;org.springframework&lt;\/groupId&gt;\n  &lt;artifactId&gt;spring-test&lt;\/artifactId&gt;\n  &lt;version&gt;6.2.15&lt;\/version&gt;\n  &lt;scope&gt;test&lt;\/scope&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528@Extendwith\u548c@ContextConfiguration\u6ce8\u89e3\uff0c\u5728\u5355\u5143\u6d4b\u8bd5\u7c7b\u4e2d\u53ef\u4ee5\u4f7f\u7528\u6ce8\u5165\u529f\u80fd\u7684\u6ce8\u89e3<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@ExtendWith(SpringExtension.class)\n@ContextConfiguration(\"classpath:application.xml\")\npublic class MyTest2 {\n\n    @Autowired\n    UserService userService;\n    @Autowired\n    OrderDao orderDao;\n    @Autowired\n    @Qualifier(\"userDaoImpl1\")\n    UserDao userDao1;\n    \/**\n     * \u4ece\u5bb9\u5668\u4e2d\u53d6\u51faUserService\u7ec4\u4ef6\n     * \u67e5\u770buserService\u7ec4\u4ef6\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u662f\u5426\u53d6\u51fa\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\n     *\/\n    @Test\n    public void mytest1(){\n\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Bean\u7684\u51c6\u5907<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-1-bean\u7684\u5b9e\u4f8b\u5316\">Bean\u7684\u5b9e\u4f8b\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff08\u9ed8\u8ba4\u65b9\u5f0f\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e5f\u662f\u6700\u5e38\u7528\u7684\u4e00\u79cd\u65b9\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Service\npublic class CategoryServiceImpl implements CategoryService{\n    @Autowired\n    UserDao userDao;\n\n    public CategoryServiceImpl() {\n        System.out.println(\"CategoryServiceImpl\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\");\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6709\u53c2\u6784\u9020\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class AdminServiceImpl implements AdminService{\n    UserDao userDao;\n    String username;\n    \/\/ \u5982\u679c\u4f60\u6709\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u9ed8\u8ba4\u4f7f\u7528\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff1b\n    \/\/ \u5982\u679c\u4f60\u6ca1\u6709\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u5b9e\u4f8b\u5316\u65f6\u4f1a\u4f7f\u7528\u6709\u53c2\u6784\u9020\u65b9\u6cd5\n    \/\/ \u5f62\u53c2\uff0c\u9ed8\u8ba4\u662f\u6309\u7167\u7c7b\u578b\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\n    \/\/ \u5982\u679c\u5f62\u53c2\u8fd9\u4e2a\u7c7b\u578b\u7684\u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u4e0d\u6b62\u4e00\u4e2a\uff0c\u53ef\u4ee5\u4f7f\u7528@Qualifier\u6307\u5b9a\u7ec4\u4ef6\n    \/\/ \u5982\u679c\u5b58\u5728\u591a\u4e2a\u6784\u9020\u5668\uff0c\u53ef\u4ee5\u6307\u5b9a\u4f7f\u7528\u4f60\u6807\u8bb0\u6784\u9020\u5668\n    \/\/@Autowired\n    public AdminServiceImpl(UserDao userDao) {\n        this.userDao = userDao;\n    }\n    @Autowired\n    public AdminServiceImpl(UserDao userDao,@Value(\"zhangsan\") String username) {\n        this.userDao = userDao;\n        this.username = username;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5de5\u5382<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5de5\u5382\u63d0\u4f9b\u5b9e\u4f8b\uff0c\u800c\u5b9e\u4f8b\u4ea4\u7ed9Spring\u5bb9\u5668\u6765\u8fdb\u884c\u7ba1\u7406<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5de5\u5382\uff08\u7565\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u914d\u7f6e\u7c7b\u4e2d\u7684\u65b9\u6cd5\uff0c\u65b9\u6cd5\u4e0a\u589e\u52a0@Bean\u6ce8\u89e3\uff0c\u8be5\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Configuration\n@ComponentScan(\"com.cskaoyan\")\npublic class AppConfiguration {\n\n  \/\/\u8fd9\u5c31\u662f\u4e00\u79cd\u5de5\u5382\n  @Bean\n  public UserService serviceProxy(UserService userService) {\n    return ProxyUtil.getServiceProxy(userService);\n  }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>FactoryBean<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u73b0FactoryBean\u63a5\u53e3\uff0c\u7ec4\u4ef6\u7c7b\u578b\u548cFactoryBean\u63a5\u53e3\u4e2d\u7684getObject\u65b9\u6cd5\u7684\u7c7b\u578b\u76f8\u540c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public interface FactoryBean&lt;T&gt; {\n    String OBJECT_TYPE_ATTRIBUTE = \"factoryBeanObjectType\";\n\n    @Nullable\n    T getObject() throws Exception;\n\n    @Nullable\n    Class&lt;?&gt; getObjectType();\n\n    default boolean isSingleton() {\n        return true;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u5c31\u662f\u4f60\u660e\u9762\u4e0a\u770b\u8d77\u6765\u6ce8\u518c\u65f6FactoryBean\u7ec4\u4ef6\uff0c\u5b9e\u9645\u4e0a\u53d6\u51fa\u7ec4\u4ef6\u7684\u65f6\u5019\u53d6\u51fa\u7684\u662fgetObject\u65b9\u6cd5\u8fd4\u56de\u7684\u5b9e\u4f8b\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd9\u4e2a\u5176\u5b9e\u662fSpring\u4e3a\u4e86\u7b2c\u4e09\u65b9\u7ec4\u4ef6\u5f00\u7684\u4e00\u4e2a\u53e3\u5b50\uff0c\u6700\u5f00\u59cb\u6709\u4e9b\u6846\u67b6\u8bbe\u8ba1\u7684\u65f6\u5019\u6ca1\u6709\u8003\u8651Spring\u6280\u672f\uff0c\u4f46\u662f\u540e\u9762\u53c8\u60f3\u8981\u4f7f\u7528Spring\uff0c\u90a3\u4e48\u5fc5\u7136\u8981\u6709Spring\u6765\u7ba1\u7406\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u901a\u8fc7\u63d0\u4f9b\u989d\u5916\u5b9e\u73b0\u7684\u62d3\u5c55\u7c7bFactoryBean\uff0c\u5b8c\u6210\u5bf9\u5e94\u6240\u9700\u8981\u5b9e\u4f8b\u7684\u7ba1\u7406\u3002\u6bd4\u5982MyBatis\u4e2d\u7684SqlSessionFactory\u901a\u8fc7\u4e00\u4e2aSqlSessionFactoryBean\u6765\u5b8c\u6210\u5b9e\u4f8b\u7684\u7ba1\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u8981\u6ce8\u518c\u4e00\u4e2aUser\u7c7b\u578b\u7684\u7ec4\u4ef6\uff0c\u53ef\u4ee5\u901a\u8fc7User\u5bf9\u5e94\u7684FactoryBean\u6765\u6ce8\u518c\u7ec4\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u76f4\u63a5\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\n * FactoryBean \ud83d\udc49 XXXFactoryBean\n *      \ud83d\udc49 \u7ec4\u4ef6\u7c7b\u578b\u548cFactoryBean\u63a5\u53e3\u4e2d\u7684getObject\u65b9\u6cd5\u76f8\u5173\n * BeanFactory\u548cfactoryBean\uff1a\n *      BeanFactory\uff1a\u751f\u4ea7\u7684\u662f\u5bb9\u5668\u4e2d\u7684\u6240\u6709\u7684\u7ec4\u4ef6\n *      FactoryBean\uff1a\u751f\u4ea7\u7684\u662f\u7279\u5b9a\u7684\u7ec4\u4ef6\n *\/\n@Component\npublic class UserFactoryBean implements FactoryBean&lt;User&gt; {\n\n    \/**\n     * \u5b8c\u6210\u7ec4\u4ef6\u7684\u5b9e\u4f8b\u5316\n     * @return \u7ec4\u4ef6\u7c7b\u578b\u548c\u8fd4\u56de\u503c\u76f8\u5173\n     * @throws Exception\n     *\/\n    @Override\n    public User getObject() throws Exception {\n        User user = new User();\n        return user;\n    }\n\n    @Override\n    public Class&lt;?&gt; getObjectType() {\n        return User.class;\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u5728\u4e3e\u4e00\u4e2a\u4f8b\u5b50\uff0c\u901a\u8fc7FactoryBean\u7684\u5f62\u5f0f\u5411\u5bb9\u5668\u4e2d\u6ce8\u518c\u4e00\u4e2aUserService\u7684<strong>\u4ee3\u7406<\/strong>\u7ec4\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class UserServiceFactoryBean implements FactoryBean&lt;UserService&gt; {\n  @Autowired\n  UserService instance;\n  @Override\n  public UserService getObject() throws Exception {\n    UserService proxy = (UserService) Proxy.newProxyInstance(UserServiceFactoryBean.class.getClassLoader(), UserServiceImpl.class.getInterfaces(), new InvocationHandler() {\n      @Override\n      public Object invoke(Object proxy, Method method, Object&#91;] args) throws Throwable {\n        System.out.println(\"\u5f00\u542f\u4e8b\u52a1\");\n        Object invoke = method.invoke(instance, args);\n        System.out.println(\"\u63d0\u4ea4\u5e76\u5173\u95ed\u4e8b\u52a1\");\n        return invoke;\n      }\n    });\n    return proxy;\n  }\n\n  @Override\n  public Class&lt;?&gt; getObjectType() {\n    return UserService.class;\n  }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u601d\u80031<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec \u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u4f7f\u7528\u7684\u5de5\u5382\u7684\u65b9\u5f0f\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u96be\u9053\u6211\u4eec\u4e0d\u662f\u76f4\u63a5\u7528\u6784\u9020\u65b9\u6cd5\u66f4\u65b9\u4fbf\u4e48\uff0c\u4e3a\u5565\u8fd8\u8981\u4f7f\u7528\u5de5\u5382\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u786e\u5b9e\uff0c\u4f7f\u7528\u6784\u9020\u65b9\u6cd5\u662f\u5f88\u65b9\u4fbf\uff0c\u4f46\u662f\u6709\u4e9b\u60c5\u51b5\u7528\u4e0d\u4e86\u6784\u9020\u65b9\u6cd5\u3002\u6bd4\u5982\u52a8\u6001\u4ee3\u7406 ProxyFactoryBean<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u6784\u9020\u5668\u8981\u63d0\u4f9b\u5927\u91cf\u7684\u53c2\u6570\uff0c\u800c\u63d0\u4f9b\u5927\u91cf\u7684\u53c2\u6570\u8fc7\u7a0b\u53c8\u6bd4\u8f83\u7e41\u7410\uff0c\u4e5f\u5c31\u662f\u901a\u5e38\u5728\u4f7f\u7528\u4e00\u4e9b\u6846\u67b6\u7684\u65f6\u5019\uff0c\u4f1a\u7ed9\u4f60\u63d0\u4f9b\u4e00\u4e9b\u5bf9\u5e94\u7684\u5de5\u5382<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u4e9b\u6846\u67b6\u5df2\u7ecf\u5199\u597d\u4e86\u4e00\u4e9b\u4ee3\u7801\uff0c\u8981\u5728\u6b64\u57fa\u7840\u4e0a\u589e\u52a0\u5bf9Spring\u6846\u67b6\u7684\u652f\u6301\uff0c\u8981\u5c06\u6846\u67b6\u4e2d\u7684\u4e00\u4e9b\u6838\u5fc3\u7684\u5bf9\u8c61\u4ea4\u7ed9Spring\u5bb9\u5668\u6765\u7ba1\u7406\uff0c\u901a\u5e38\u5c31\u4f1a\u63d0\u4f9b\u4e00\u4e2a\u6846\u67b6\u7684\u62d3\u5c55\u5305\uff0c\u62d3\u5c55\u5305\u4e2d\u63d0\u4f9b\u5bf9\u5e94\u7684\u5de5\u5382\uff0c\u4f7f\u7528\u5de5\u5382\u53ef\u4ee5\u76f4\u63a5\u5c06\u8fd9\u4e2a\u6846\u67b6\u9700\u8981\u7684\u6838\u5fc3\u5bf9\u8c61\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6 SqlSessionFactoryBean<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5de5\u5382\uff1a\u4e3b\u8981\u5c31\u662f\u5bf9\u5df2\u6709\u7684\u4ee3\u7801\u505a\u4e9b\u62d3\u5c55<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9762\u8bd5\u9898<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">BeanFactory\u548cFactoryBean\u4e4b\u95f4\u7684\u8054\u7cfb\u548c\u533a\u522b<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u8054\u7cfb\uff1a\u901a\u8fc7\u4ed6\u4e24\u90fd\u53ef\u4ee5\u5411\u5bb9\u5668\u4e2d\u6ce8\u518c\u7ec4\u4ef6<br>\u533a\u522b\uff1aBeanFactory\u662f\u5bb9\u5668\uff0c\u6240\u6709\u7684\u7ec4\u4ef6\u6ce8\u518c\u90fd\u662f\u901a\u8fc7BeanFactory\uff1b\u800cFactoryBean\u6ce8\u518c\u7684\u7279\u5b9a\u7684\u5355\u4e2a\u7ec4\u4ef6<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-2-\u4f5c\u7528\u57df-scope\">\u4f5c\u7528\u57df Scope<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Singleton\uff1a\u5355\u4f8b\uff0c\u6bcf\u4e00\u6b21\u53d6\u51fa\u7ec4\u4ef6\u90fd\u662f\u540c\u4e00\u4e2a\u7ec4\u4ef6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prototype\uff1a\u539f\u578b\uff0c\u6bcf\u4e00\u6b21\u53d6\u51fa\u7ec4\u4ef6\u90fd\u662f\u5168\u65b0\u7684\u7ec4\u4ef6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ed8\u8ba4\u503c\u662fsingleton\uff0c\u6211\u4eec\u901a\u5e38\u7701\u7565\u4e0d\u5199<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">@Scope \u4f7f\u7528value\u5c5e\u6027\u6307\u5b9a\u4f5c\u7528\u57df<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\n@Scope(\"singleton\")\npublic class SingletonBean {\n}\n@Component\n@Scope(\"prototype\")\npublic class PrototypeBean {\n}\n@Component\npublic class DefaultBean {\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u518c3\u4e2a\u7ec4\u4ef6\uff0c\u5206\u522b\u7ed9\u5230\u4e0d\u540c\u7684scope\uff0c\u7136\u540e\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\u591a\u6b21\uff0c\u67e5\u770b\u662f\u5426\u662f\u540c\u4e00\u4e2a\u7ec4\u4ef6\uff08\u67e5\u770b\u5185\u5b58\u5730\u5740\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Test\npublic void mytest1(){\n    ApplicationContext applicationContext = new AnnotationConfigApplicationContext(SpringConfiguration.class);\n    SingletonBean bean1 = applicationContext.getBean(SingletonBean.class);\n    SingletonBean bean2 = applicationContext.getBean(SingletonBean.class);\n    SingletonBean bean3 = applicationContext.getBean(SingletonBean.class);\n}\n@Test\npublic void mytest2(){\n    ApplicationContext applicationContext = new AnnotationConfigApplicationContext(SpringConfiguration.class);\n    PrototypeBean bean1 = applicationContext.getBean(PrototypeBean.class);\n    PrototypeBean bean2 = applicationContext.getBean(PrototypeBean.class);\n    PrototypeBean bean3 = applicationContext.getBean(PrototypeBean.class);\n}\n@Test\npublic void mytest3(){\n    ApplicationContext applicationContext = new AnnotationConfigApplicationContext(SpringConfiguration.class);\n    DefaultBean bean1 = applicationContext.getBean(DefaultBean.class);\n    DefaultBean bean2 = applicationContext.getBean(DefaultBean.class);\n    DefaultBean bean3 = applicationContext.getBean(DefaultBean.class);\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>@ExtendWith(SpringExtension.class)\n@ContextConfiguration(classes = {AppConfiguration.class})\npublic class ScopeTest {\n    @Autowired\n    SingletonBean singletonBean1;\n    @Autowired\n    SingletonBean singletonBean2;\n    @Autowired\n    SingletonBean singletonBean3;\n\n    @Autowired\n    PrototypeBean prototypeBean1;\n    @Autowired\n    PrototypeBean prototypeBean2;\n    @Autowired\n    PrototypeBean prototypeBean3;\n\n    @Autowired\n    DefaultBean defaultBean1;\n    @Autowired\n    DefaultBean defaultBean2;\n    @Autowired\n    DefaultBean defaultBean3;\n    @Test\n    public void testScope() {\n        System.out.println(1);\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-3-\u751f\u547d\u5468\u671f\">\u751f\u547d\u5468\u671f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6982\u5ff5<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u751f\u547d\u5468\u671f\u6307\u7ec4\u4ef6\u5728\u5bb9\u5668\u4e2d\u8981\u5b8c\u6210\u5b9e\u4f8b\u5316\uff0c\u7ec4\u4ef6\u4ece\u5b9e\u4f8b\u5316\u5f00\u59cb\u76f4\u81f3\u53ef\u7528\u72b6\u6001\u4f1a\u6267\u884c\u5230\u54ea\u4e9b\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b66Servlet\u7684\u65f6\u5019\u5b66\u8fc7\u751f\u547d\u5468\u671f\uff0cServlet\u7684\u751f\u547d\u5468\u671f\uff1ainit\u3001service\u3001destroy<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51c6\u5907\u9636\u6bb5<\/li>\n\n\n\n<li>\u670d\u52a1\u9636\u6bb5<\/li>\n\n\n\n<li>\u9500\u6bc1\u9636\u6bb5<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8eBean\uff08\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\uff09\uff0c\u5728\u5bb9\u5668\u4e2d\u4e5f\u4f1a\u7ecf\u5386\u8fd9\u6837\u7684\u4e00\u4e9b\u9636\u6bb5<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5bb9\u5668\u521d\u59cb\u5316\u7684\u65f6\u5019\uff0c\u7ec4\u4ef6\u505a\u51c6\u5907\u6027\u5de5\u4f5c \u2192 \u653e\u5165\u5230\u5bb9\u5668\u4e2d\u4e4b\u524d\uff0c\u4f1a\u6267\u884c\u54ea\u4e00\u4e9b\u65b9\u6cd5\u6765\u51c6\u5907\u5b9e\u4f8b<\/strong><\/li>\n\n\n\n<li>\u7ec4\u4ef6\u53ef\u4ee5\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\uff0c\u63d0\u4f9b\u670d\u52a1\uff0c\u6bd4\u5982\u4ece\u5bb9\u5668\u4e2d\u53d6\u51fauserService\u5b9e\u4f8b\uff0c\u8c03\u7528\u5176sayHello\u65b9\u6cd5<\/li>\n\n\n\n<li>\u5bb9\u5668\u5173\u95ed\uff0c\u7ec4\u4ef6\u505a\u9500\u6bc1\u5de5\u4f5c<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u7279\u5b9a\u7684\u65f6\u95f4\u6267\u884c\u4e00\u7cfb\u5217\u7684\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u989d\u5916\u5f15\u5165\u7684\u4f9d\u8d56<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u521d\u59cb\u5316\u548c\u9500\u6bc1\u7684\u65b9\u6cd5\u9700\u8981\u5f15\u5165\u4f9d\u8d56(\u4e4b\u524d\u7248\u672c\u7684jdk\u4e0d\u9700\u8981\u5f15\u5165)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Spring6\u7248\u672c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;dependency&gt;\n    &lt;groupId&gt;jakarta.annotation&lt;\/groupId&gt;\n    &lt;artifactId&gt;jakarta.annotation-api&lt;\/artifactId&gt;\n    &lt;version&gt;3.0.0&lt;\/version&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u521d\u59cb\u5316\u9636\u6bb5\u7684\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Bean\u7684\u5b9e\u4f8b\u5316\uff08\u6709\u53c2\u6784\u9020\u65b9\u6cd5\u3001\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff09<\/li>\n\n\n\n<li>\u8bbe\u7f6e\u53c2\u6570\u65b9\u6cd5\uff08\u65b9\u6cd5\u6ce8\u5165\u3001\u6210\u5458\u53d8\u91cf\u6ce8\u5165\uff09<\/li>\n\n\n\n<li>BeanNameAware\u3001BeanFactoryAware\u3001ApplicationContextAware<\/li>\n\n\n\n<li><strong>BeanPostProcessor<\/strong>\uff08Bean\u7684\u540e\u5904\u7406\u5668\uff0c\u8fd9\u4e2a\u540e\u6307\u7684\u662f\u5b9e\u4f8b\u5316\u4e4b\u540e\uff0c\u5176\u5b9e\u8fd8\u662f\u5728\u653e\u5165\u5230\u5bb9\u5668\u4e2d\u4e4b\u524d\uff09\u7684postProcessBeforeInitialization\uff08\u540e\u9762\u6709\u521d\u59cb\u5316\u65b9\u6cd5\uff09<\/li>\n\n\n\n<li>InitializingBean\u7684afterPropertiesSet\u65b9\u6cd5\uff08\u901a\u5e38\u662f\u4e00\u4e9b\u6846\u67b6\u63d0\u4f9b\u7684\u7c7b\u521d\u59cb\u5316\u7684\u65b9\u5f0f\uff09<\/li>\n\n\n\n<li>\u81ea\u5b9a\u4e49\u7684init\u65b9\u6cd5\uff08\u6211\u4eec\u81ea\u5df1\u505a\u5f00\u53d1\u7684\u65f6\u5019\u901a\u5e38\u4f7f\u7528\u7684\u65b9\u5f0f\uff09<\/li>\n\n\n\n<li><strong>BeanPostProcessor<\/strong>\u7684postProcessAfterInitialization<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/lifecycle.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/lifecycle.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Bean \u751f\u547d\u5468\u671f\u6d41\u7a0b\"\/><\/div><figcaption class=\"wp-element-caption\">Bean \u751f\u547d\u5468\u671f\u6d41\u7a0b<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20240827114645650.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/118.25.99.91\/image\/10-Spring-IOC-optimized\/image-20240827114645650.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Bean \u751f\u547d\u5468\u671f\u6267\u884c\u987a\u5e8f\"\/><\/div><figcaption class=\"wp-element-caption\">Bean \u751f\u547d\u5468\u671f\u6267\u884c\u987a\u5e8f<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BeanPostProcessor\u548c\u6b63\u5728\u6267\u884c\u751f\u547d\u5468\u671f\u7684\u7ec4\u4ef6\u5e76\u4e0d\u662f\u540c\u4e00\u4e2a<\/strong>\uff0cBeanPostProcessor\u662f\u989d\u5916\u63d0\u4f9b\u7684\uff0c\u800c\u989d\u5916\u63d0\u4f9b\u7684\u8fd9\u4e2aBeanPostProcessor\u7ec4\u4ef6 \u5b83\u7684\u4f5c\u7528\u8303\u56f4\uff1a<strong>\u9664\u4e86BeanPostProcessor\u672c\u8eab\uff0c\u5176\u4ed6\u7684\u6240\u6709\u7ec4\u4ef6<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ec4\u4ef6\u662f\u4ec0\u4e48\u65f6\u5019\u5f00\u59cb\u6267\u884c\u751f\u547d\u5468\u671f\u7684\uff1a\u5bb9\u5668\u521d\u59cb\u5316\u7684\u65f6\u5019\uff08\u5355\u4f8b\u7ec4\u4ef6\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">prototype\u7ec4\u4ef6 \u2192 \u4ece\u5bb9\u5668\u4e2d\u53d6\u51fa\u7ec4\u4ef6\u7684\u65f6\u5019\u6267\u884c\u7684\u751f\u547d\u5468\u671f\uff0c\u4e0d\u53d6\u5c31\u4e0d\u6267\u884c\uff0c\u53d6\u4e00\u6b21\u6267\u884c\u4e00\u6b21\uff0c\u53d6\u4e24\u6b21\u5c31\u6267\u884c\u4e24\u6b21<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5bb9\u5668\u5173\u95ed\u9636\u6bb5\u7684\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5355\u4f8b\u7684\u7ec4\u4ef6\u624d\u4f1a\u6267\u884c\u5230\u5bf9\u5e94\u7684\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DisposableBean\u7684destroy\u65b9\u6cd5\uff08\u901a\u5e38\u662f\u6846\u67b6\u63d0\u4f9b\u7684\u7c7b\u91c7\u7528\u8fd9\u79cd\u65b9\u5f0f\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u81ea\u5b9a\u4e49\u7684destroy\u65b9\u6cd5\uff08\u901a\u5e38\u662f\u81ea\u5b9a\u4e49\u7684\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BeanPostProcessor<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u975e\u5e38\u7279\u6b8a\uff1a\u662f\u9488\u5bf9\u4e8e\u6240\u6709\u7ec4\u4ef6\u7684\u751f\u547d\u5468\u671f\u7684\u5f3a\u5316\u65b9\u6cd5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5b9a\u4e49\u4e86BeanPostProcessor\uff0c\u5bb9\u5668\u4e2d<strong>\u5168\u90e8\u7ec4\u4ef6<\/strong>\u751f\u547d\u5468\u671f\u8fc7\u7a0b\u4e2d\u90fd\u4f1a\u6267\u884c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65b9\u6cd5<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>postProcessBeforeInitialization\uff1a\u521d\u59cb\u5316\u9636\u6bb5\u81ea\u5b9a\u4e49\u521d\u59cb\u5316\u65b9\u6cd5\u4e4b\u524d<\/li>\n\n\n\n<li>postProcessAfterInitialization\uff1a\u521d\u59cb\u5316\u9636\u6bb5\u81ea\u5b9a\u4e49\u521d\u59cb\u5316\u65b9\u6cd5\u4e4b\u540e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53c2\u6570<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53c2\u65701\uff1a\u6b63\u5728\u751f\u547d\u5468\u671f\u7684\u7ec4\u4ef6\u5b9e\u4f8b(\u8fd8\u6ca1\u6709\u653e\u5165\u5230\u5bb9\u5668\u4e2d)<\/li>\n\n\n\n<li>\u53c2\u65702\uff1a\u7ec4\u4ef6\u7684\u540d\u79f0(\u7ec4\u4ef6\u7684id)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fd4\u56de\u503c<\/strong>\uff1a\u5b9e\u4f8b \u4ea4\u7ed9\u4e0b\u4e00\u4e2a\u6d41\u7a0b\uff08\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\u5176\u5b9e\u662f\u8fd4\u56de\u7684\u8fd9\u4e2a\u5b9e\u4f8b\uff09 \u4e5f\u5c31\u662f\u8bf4\u5bb9\u5668\u4e2d\u7ba1\u7406\u7684\u5b9e\u4f8b\u53d6\u51b3\u4e8ereturn\u8fd4\u56de\u7684\u503c \u8fd9\u4e24\u4e2a\u65b9\u6cd5\u6309\u9700\u63d0\u4f9b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u793a\u4f8b\u751f\u547d\u5468\u671f\u7684\u7ec4\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class LifeCycleBean implements BeanNameAware, BeanFactoryAware, ApplicationContextAware,\n        InitializingBean,\n        DisposableBean\n{\n\n    \/\/ 1. \u6784\u9020\u5668\u5b9e\u4f8b\u5316(\u6709\u53c2\u65e0\u53c2\u90fd\u884c)\n    public LifeCycleBean() {\n        System.out.println(\"1. \u6784\u9020\u5668\u5b9e\u4f8b\u5316(\u4e00\u5b9a\u662f\u6700\u5f00\u59cb\u6267\u884c\u7684)\");\n    }\n\n    \/\/ 2.\u8bbe\u7f6e\u5c5e\u6027\u503c(\u4e3b\u8981\u5c31\u662fset\u65b9\u6cd5\u3001\u4e5f\u53ef\u4ee5\u76f4\u63a5\u589e\u52a0\u5728\u6210\u5458\u53d8\u91cf\u4e0a)\n    private String name;\n    private UserDao userDao;\n    @Autowired\n    public void setUserDao(UserDao userDao) {\n        this.userDao = userDao;\n        System.out.println(\"2. \u8bbe\u7f6e\u5c5e\u6027\u503c(\u4e3b\u8981\u5c31\u662fset\u65b9\u6cd5\u3001\u4e5f\u53ef\u4ee5\u76f4\u63a5\u589e\u52a0\u5728\u6210\u5458\u53d8\u91cf\u4e0a)\");\n    }\n    \/\/ \u8bbe\u7f6e\u5c5e\u6027\u503c\u5982\u679c\u4e0d\u4e3a\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u4f7f\u7528@Value\u6ce8\u89e3\u8bbe\u7f6e\n    @Autowired\n    public void setName(@Value(\"\u5f20\u4e09\") String name) {\n        this.name = name;\n    }\n\n\n    \/\/ 3. Aware\u63a5\u53e3\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u4f1a\u5728\u751f\u547d\u5468\u671f\u8fc7\u7a0b\u4e2d\u81ea\u52a8\u6267\u884c\n    \/\/    \u8fd9\u4e9b\u65b9\u6cd5\u4f1a\u6709\u53c2\u6570\uff0cbeanName\u3001beanFactory\u3001applicationContext\n    \/\/    \u4e3b\u8981\u5c31\u662f\u7ed9\u7ec4\u4ef6\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u505a\u8d4b\u503c,\u5bb9\u5668\u4e2d\u7684\u8fd9\u4e2a\u7ec4\u4ef6\u7684\u5176\u4ed6\u65b9\u6cd5\u5c31\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u6210\u5458\u53d8\u91cf\u4e86\n    \/\/    \u8fd9\u51e0\u4e2a\u63a5\u53e3\u6211\u4eec\u4e00\u822c\u4e0d\u592a\u7528\uff0c\u4e00\u822c\u662f\u770b\u6e90\u7801\u7684\u65f6\u5019\u5927\u5bb6\u8981\u80fd\u770b\u61c2\n    private String beanName;\n    private BeanFactory beanFactory;\n    \/\/ \u81ea\u5df1\u5199\u7684\u4ee3\u7801\uff0c\u76f4\u63a5\u53d6\u5c31\u5b8c\u4e86\uff1b\u4f46\u662f\u6211\u4eec\u4f1a\u770b\u4e00\u4e9b\u6e90\u7801\uff0c\u6e90\u7801\u91cc\u4f7f\u7528\u7684\u5c31\u662f\u5b9e\u73b0\u63a5\u53e3\u7684\u65b9\u6cd5\u7684\u65b9\u5f0f\n    \/\/    \u7b2c\u4e09\u65b9\u6216\u4e00\u4e9b\u6e90\u7801\u91cc\uff0c\u5e76\u4e0d\u4f1a\u5728\u7c7b\u4e0a\u76f4\u63a5\u589e\u52a0\u6ce8\u89e3(\u6bd4\u5982@Component)\uff0c\u52a0\u6ce8\u89e3\u8981\u6709\u626b\u63cf\u5305\u914d\u7f6e\n    \/\/@Autowired\n    private ApplicationContext applicationContext;\n\n    @Override\n    public void setBeanName(String name) {\n        this.beanName = name;\n        System.out.println(\"3. BeanNameAware.setBeanName\");\n    }\n    @Override\n    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {\n        this.beanFactory = beanFactory;\n        System.out.println(\"3. BeanFactoryAware.setBeanFactory\");\n    }\n\n    @Override\n    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {\n        this.applicationContext = applicationContext;\n        System.out.println(\"3. ApplicationContextAware.setApplicationContext\");\n        \/\/System.out.println(applicationContext);\n    }\n\n    \/\/ \u521d\u59cb\u5316\u65b9\u6cd5\u901a\u5e38\u53ea\u4f7f\u7528\u5176\u4e2d\u7684\u4e00\u79cd\n    \/\/ 5. \u81ea\u5b9a\u4e49\u7684init\u65b9\u6cd5\n    @PostConstruct \/\/ \u6784\u9020\u5668\u4e4b\u540e(\u4f46\u662f\u8fd9\u662f\u4e00\u4e2a\u521d\u59cb\u5316\u65b9\u6cd5)\n    public void customInitMethod() {\n        System.out.println(\"5. \u81ea\u5b9a\u4e49\u7684init\u65b9\u6cd5(\u81ea\u5df1\u5f00\u53d1\u7684\u7c7b\uff0c\u76f4\u63a5\u4f7f\u7528\u5373\u53ef)\");\n    }\n\n    \/\/ 5. \u5b9e\u73b0\u63a5\u53e3\u7684init\u65b9\u6cd5\n    @Override\n    public void afterPropertiesSet() throws Exception {\n        System.out.println(\"5. InitializingBean.afterPropertiesSet(\u4e00\u822c\u662f\u7b2c\u4e09\u65b9\u7684\u7c7b)\");\n    }\n\n\n    \/\/ \u9500\u6bc1\u65b9\u6cd5\u901a\u5e38\u53ea\u4f7f\u7528\u5176\u4e2d\u7684\u4e00\u79cd\n    @PreDestroy \/\/ \u5bb9\u5668\u9500\u6bc1\u4e4b\u524d(\u4f46\u662f\u8fd9\u662f\u4e00\u4e2a\u9500\u6bc1\u65b9\u6cd5)\n    public void customDestroyMethod() {\n        System.out.println(\"7. \u81ea\u5b9a\u4e49\u7684\u9500\u6bc1\u65b9\u6cd5(\u81ea\u5df1\u5f00\u53d1\u7684\u7c7b\uff0c\u76f4\u63a5\u4f7f\u7528\u5373\u53ef)\");\n    }\n\n    @Override\n    public void destroy() throws Exception {\n        System.out.println(\"7. DisposableBean.destroy(\u4e00\u822c\u662f\u7b2c\u4e09\u65b9\u7684\u7c7b)\");\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">BeanPostProcessor<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u5b83\u5c31\u662f\u63d0\u4f9b\u65b9\u6cd5\u7684\u7ec4\u4ef6(\u65b9\u6cd5\u7684\u8f7d\u4f53)\n *\n *    \u8fd9\u4e24\u4e2a\u65b9\u6cd5\uff1a\u5bb9\u5668\u4e2d\u7684\u6bcf\u4e00\u4e2a\u7ec4\u4ef6 \u751f\u547d\u5468\u671f\u7684\u521d\u59cb\u5316\u9636\u6bb5\u90fd\u4f1a\u53bb\u6267\u884c\n *      \u53c2\u65701\uff1a\u6b63\u5728\u751f\u547d\u5468\u671f\u7684\u7ec4\u4ef6\u5b9e\u4f8b(\u8fd8\u6ca1\u6709\u653e\u5165\u5230\u5bb9\u5668\u4e2d)\n *      \u53c2\u65702\uff1a\u7ec4\u4ef6\u7684\u540d\u79f0(\u7ec4\u4ef6\u7684id)\n *    \u8fd4\u56de\u503c\uff1a\u5b9e\u4f8b\n *      \u4ea4\u7ed9\u4e0b\u4e00\u4e2a\u6d41\u7a0b\uff08\u5bb9\u5668\u4e2d\u7684\u7ec4\u4ef6\u5176\u5b9e\u662f\u8fd4\u56de\u7684\u8fd9\u4e2a\u5b9e\u4f8b\uff09\n *      \u4e5f\u5c31\u662f\u8bf4\u5bb9\u5668\u4e2d\u7ba1\u7406\u7684\u5b9e\u4f8b\u53d6\u51b3\u4e8ereturn\u8fd4\u56de\u7684\u503c\n *   \u8fd9\u4e24\u4e2a\u65b9\u6cd5\u6309\u9700\u63d0\u4f9b\n *\n *\n *   \u5168\u90e8\u7ec4\u4ef6\u521d\u59cb\u5316\u7684\u65f6\u5019\u7684\u65f6\u5019\u4f1a\u6267\u884c\n *\n *   \u6211\u662f\u5426\u53ef\u4ee5\u9488\u5bf9\u7279\u5b9a\u7684\u7ec4\u4ef6\u505a\u5904\u7406\u5462\uff1f\uff1f\uff1f\n *\n *\/\n@Component\npublic class CustomBeanPostProcessor implements BeanPostProcessor {\n\n  @Nullable\n  @Override\n  public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {\n    System.out.println(beanName + \" \uff1a4. CustomBeanPostProcessor postProcessBeforeInitialization\");\n    return bean;\n  }\n\n  \/\/ \u4e24\u4e2a\u65b9\u6cd5\u4e4b\u95f4\uff1a\u521d\u59cb\u5316\u65b9\u6cd5(\u81ea\u5b9a\u4e49\u7684init\u65b9\u6cd5\u6216\u5b9e\u73b0InitializingBean\u63a5\u53e3)\n\n  @Nullable\n  @Override\n  public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {\n    System.out.println(beanName + \" \uff1a6. CustomBeanPostProcessor postProcessAfterInitialization\");\n    return bean;\n  }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ec4\u4ef6\u6ce8\u518c\u5230\u5bb9\u5668\u4e2d\u624d\u4f1a\u751f\u6548<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u9488\u5bf9\u7279\u5b9a\u7684\u7ec4\u4ef6\u505a\u5904\u7406\uff0c\u5728\u5176\u4e2d\u505a\u5224\u65ad\u5373\u53ef\uff0c\u6bd4\u5982<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Class clazz = bean.getClass();\nif(clazz.isAnnotationPresent(WdFlag.class)){\n  System.err.println(beanName + \" \uff1ahello world\");\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"4-4-\u6ce8\u610f\">\u6ce8\u610f\uff1a\u751f\u547d\u5468\u671f\u7684\u65b9\u6cd5\uff0c\u4e0d\u662f\u90fd\u4f1a\u6267\u884c\u5230\u7684\uff0c\u6709\u4e9b\u6267\u884c\u662f\u9700\u8981\u6761\u4ef6\u7684\u3002\u53e6\u5916\u8981\u6ce8\u610fBeanPostProcessor\u7684\u4f5c\u7528\u8303\u56f4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u672c\u7ae0\u6838\u5fc3\u6982\u5ff5<\/strong>\uff1aBean \u8fdb\u5165\u5bb9\u5668\u524d\u540e\u4f1a\u7ecf\u5386\u5b9e\u4f8b\u5316\u3001\u4f9d\u8d56\u8bbe\u7f6e\u3001Aware \u56de\u8c03\u3001\u521d\u59cb\u5316\u3001\u540e\u5904\u7406\u5668\u589e\u5f3a\u548c\u9500\u6bc1\u7b49\u8fc7\u7a0b\uff0c\u4e0d\u540c\u4f5c\u7528\u57df\u4f1a\u5f71\u54cd\u751f\u547d\u5468\u671f\u89e6\u53d1\u65f6\u673a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ecb\u7ecdSpring SpringFramework\u7684\u8d77\u6e90 Spring Framework\u901a\u5e38\u4eba\u4eec\u79f0\u4e4b\u4e3aSpri [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[18,17],"class_list":["post-122","post","type-post","status-publish","format-standard","hentry","category-learn","tag-spring","tag-17"],"_links":{"self":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/comments?post=122"}],"version-history":[{"count":3,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/122\/revisions"}],"predecessor-version":[{"id":244,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/122\/revisions\/244"}],"wp:attachment":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/media?parent=122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/categories?post=122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/tags?post=122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}