\u66f4\u51c6\u786e\u5730\u8bf4\uff1a<\/p>\n\n\n\n
- \n
- Servlet \u662f\u4e00\u4e2a Java \u7c7b<\/li>\n\n\n\n
- \u5b83\u4e0d\u662f\u72ec\u7acb\u8fd0\u884c\u7684\u4e3b\u7a0b\u5e8f<\/li>\n\n\n\n
- \u5b83\u5fc5\u987b\u8fd0\u884c\u5728 Web \u5bb9\u5668\u4e2d\uff0c\u4f8b\u5982 Tomcat<\/li>\n\n\n\n
- \u5b83\u7684\u4efb\u52a1\u662f\u63a5\u6536 HTTP \u8bf7\u6c42\u3001\u5904\u7406\u4e1a\u52a1\u3001\u8fd4\u56de HTTP \u54cd\u5e94<\/li>\n<\/ul>\n\n\n\n
![\"\"](\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\")
<\/div><\/figure>\n\n\n\n\u6d4f\u89c8\u5668 -> HTTP\u8bf7\u6c42 -> Tomcat -> Servlet -> \u4e1a\u52a1\u5904\u7406 -> HTTP\u54cd\u5e94 -> \u6d4f\u89c8\u5668<\/code><\/pre>\n\n\n\nServlet \u7684\u6838\u5fc3\u4ef7\u503c\u5c31\u5728\u4e8e\uff1a\u5b83\u8ba9\u670d\u52a1\u5668\u80fd\u201c\u6839\u636e\u8bf7\u6c42\u52a8\u6001\u505a\u4e8b\u201d\uff0c\u800c\u4e0d\u53ea\u662f\u8fd4\u56de\u6587\u4ef6\u3002<\/p>\n\n\n\n
\u6838\u5fc3\u6982\u5ff5<\/strong>\uff1aServlet \u662f\u8fd0\u884c\u5728 Web \u5bb9\u5668\u4e2d\u7684 Java \u7c7b\uff0c\u7528\u6765\u5904\u7406 HTTP \u8bf7\u6c42\u5e76\u751f\u6210\u52a8\u6001\u54cd\u5e94\u3002<\/p>\n\n\n\n
Web\u5e94\u7528\u76ee\u5f55\u4e0e\u8fd0\u884c\u65b9\u5f0f<\/h2>\n\n\n\n
\u4e00\u4e2a\u5178\u578b Web \u5e94\u7528\u7684\u6807\u51c6\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n
WebRoot\/\n\u251c\u2500\u2500 html\u3001css\u3001js\u3001images \u7b49\u9759\u6001\u8d44\u6e90\n\u251c\u2500\u2500 META-INF\/\n\u2514\u2500\u2500 WEB-INF\/\n \u251c\u2500\u2500 classes\/\n \u251c\u2500\u2500 lib\/\n \u2514\u2500\u2500 web.xml<\/code><\/pre>\n\n\n\n\u5176\u4e2d\u6700\u91cd\u8981\u7684\u662f
WEB-INF\/<\/code>\uff1a<\/p>\n\n\n\n- \n
- \u6d4f\u89c8\u5668\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee
WEB-INF<\/code> \u4e0b\u7684\u5185\u5bb9<\/li>\n\n\n\n- \u7f16\u8bd1\u540e\u7684
.class<\/code> \u6587\u4ef6\u901a\u5e38\u653e\u5728WEB-INF\/classes<\/code><\/li>\n\n\n\n- \u4f9d\u8d56 jar \u5305\u901a\u5e38\u653e\u5728
WEB-INF\/lib<\/code><\/li>\n\n\n\nweb.xml<\/code> \u662f\u4f20\u7edf Web \u5e94\u7528\u7684\u914d\u7f6e\u6587\u4ef6<\/li>\n<\/ul>\n\n\n\n\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u66f4\u5e38\u89c1\u7684\u662f Maven Web \u5de5\u7a0b\uff1a<\/p>\n\n\n\n
project\/\n\u251c\u2500\u2500 pom.xml\n\u2514\u2500\u2500 src\/\n \u251c\u2500\u2500 main\/\n \u2502 \u251c\u2500\u2500 java\/\n \u2502 \u251c\u2500\u2500 resources\/\n \u2502 \u2514\u2500\u2500 webapp\/\n \u2502 \u251c\u2500\u2500 WEB-INF\/\n \u2502 \u2514\u2500\u2500 \u9759\u6001\u8d44\u6e90\n \u2514\u2500\u2500 test\/<\/code><\/pre>\n\n\n\n\u5b83\u4e0e\u6807\u51c6 Web \u7ed3\u6784\u7684\u5bf9\u5e94\u5173\u7cfb\u5982\u4e0b\uff1a<\/p>\n\n\n\n
Maven \u76ee\u5f55<\/th> \u90e8\u7f72\u540e\u4f4d\u7f6e<\/th> \u8bf4\u660e<\/th><\/tr><\/thead> src\/main\/java<\/code><\/td>WEB-INF\/classes<\/code><\/td>Java \u6e90\u7801\u7f16\u8bd1\u540e\u8f93\u51fa\u5230\u8fd9\u91cc<\/td><\/tr> src\/main\/resources<\/code><\/td>WEB-INF\/classes<\/code><\/td>\u914d\u7f6e\u6587\u4ef6\u7b49\u8d44\u6e90\u4f1a\u88ab\u590d\u5236\u5230\u8fd9\u91cc<\/td><\/tr> src\/main\/webapp<\/code><\/td>Web \u6839\u76ee\u5f55<\/td> HTML\u3001CSS\u3001JS\u3001\u56fe\u7247\u7b49\u4f1a\u76f4\u63a5\u53d1\u5e03<\/td><\/tr> pom.xml<\/code> \u4e2d\u4f9d\u8d56<\/td>WEB-INF\/lib<\/code><\/td>\u4f9d\u8d56 jar \u4f1a\u88ab\u653e\u5230\u5e94\u7528\u8fd0\u884c\u65f6\u76ee\u5f55<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n <\/div><\/figure>\n\n\n\n\u4f7f\u7528war\u6253\u5305\u4e4b\u540e\u7684java\u9879\u76ee\u7ed3\u6784<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u5f00\u53d1\u548c\u7f16\u8bd1\u7684\u8def\u5f84\u5bf9\u5e94\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\nIDEA \u914d\u5408 Tomcat \u8fd0\u884c Web \u9879\u76ee\u65f6\uff0c\u672c\u8d28\u4e0a\u505a\u4e86\u4e09\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n
- \n
- \u7f16\u8bd1 Java \u6e90\u7801<\/li>\n\n\n\n
- \u6309 Web \u5e94\u7528\u7ed3\u6784\u7ec4\u88c5\u8f93\u51fa\u76ee\u5f55<\/li>\n\n\n\n
- \u628a\u8f93\u51fa\u76ee\u5f55\u6620\u5c04\u7ed9 Tomcat \u8bbf\u95ee<\/li>\n<\/ol>\n\n\n\n
\u5e38\u89c1\u914d\u7f6e\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n
- \n
Run -> Edit Configurations<\/code><\/li>\n\n\n\n- \u6dfb\u52a0
Tomcat Server -> Local<\/code><\/li>\n\n\n\n- \u914d\u7f6e
Tomcat Home<\/code><\/li>\n\n\n\n- \u5728
Deployment<\/code> \u4e2d\u6dfb\u52a0war exploded<\/code><\/li>\n\n\n\n- \u8bbe\u7f6e
Application Context<\/code><\/li>\n<\/ol>\n\n\n\n\u56fe\u5f62\u5316\u754c\u9762\u5b8c\u6210\u865a\u62df\u6620\u5c04<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u6620\u5c04\u6587\u4ef6\u5b58\u653e\u5728\u4e34\u65f6\u6587\u4ef6\u5939\u4e2d\uff0c\u4e3a\u4e86\u907f\u514d\u6c61\u67d3\u539f\u672c\u7684tomcat\u914d\u7f6e<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u5176\u4e2d
Application Context<\/code> \u51b3\u5b9a\u8bbf\u95ee\u8def\u5f84\u524d\u7f00\u3002<\/p>\n\n\n\n\u4f8b\u5982\uff1a<\/p>\n\n\n\n
Application Context = \/demo<\/code><\/pre>\n\n\n\n\u90a3\u4e48\u8bbf\u95ee\u5730\u5740\u901a\u5e38\u5c31\u662f\uff1a<\/p>\n\n\n\n
http://localhost:8080\/demo\/hello<\/code><\/pre>\n\n\n\n\u8fd9\u91cc\u7684 URL \u5e76\u4e0d\u662f\u201c\u968f\u4fbf\u5199\u7684\u5b57\u7b26\u4e32\u201d\uff0c\u5b83\u548c Tomcat \u4e2d\u7684\u5e94\u7528\u8def\u5f84\u3001\u8d44\u6e90\u8def\u5f84\u662f\u5bf9\u5e94\u8d77\u6765\u7684\u3002<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u56de\u5230 Tomcat \u670d\u52a1\u5668\u672c\u8eab\uff1a<\/p>\n\n\n\n
- \n
webapps<\/code> \u4e0b\u7684\u76ee\u5f55\u5929\u7136\u4f1a\u5f62\u6210\u53ef\u8bbf\u95ee\u5e94\u7528<\/li>\n\n\n\nROOT<\/code> \u5bf9\u5e94\u8bbf\u95ee\/<\/code><\/li>\n\n\n\n- \u5176\u4ed6\u76ee\u5f55\u540d\u901a\u5e38\u5bf9\u5e94\u81ea\u5df1\u7684\u4e0a\u4e0b\u6587\u8def\u5f84<\/li>\n\n\n\n
- \u901a\u8fc7
conf\/Catalina\/localhost\/*.xml<\/code> \u914d\u7f6edocBase<\/code> \u65f6\uff0c\u672c\u8d28\u4e0a\u662f\u5728\u628a\u67d0\u4e2a\u8bbf\u95ee\u8def\u5f84\u6620\u5c04\u5230\u6307\u5b9a\u78c1\u76d8\u76ee\u5f55<\/li>\n<\/ul>\n\n\n\n<\/div><\/figure>\n\n\n\nServlet \u76f8\u5173\u7684\u5f88\u591a 404\uff0c\u672c\u8d28\u4e0a\u90fd\u4e0d\u662f\u201cServlet \u5199\u9519\u4e86\u201d\uff0c\u800c\u662f\u90e8\u7f72\u7ed3\u6784\u4e0d\u5bf9<\/strong>\u3002<\/p>\n\n\n\n
\u5e38\u89c1\u9519\u8bef\u5305\u62ec\uff1a<\/p>\n\n\n\n
- \n
- \u9759\u6001\u8d44\u6e90\u653e\u9519\u76ee\u5f55\uff0c\u5bfc\u81f4\u6d4f\u89c8\u5668\u627e\u4e0d\u5230<\/li>\n\n\n\n
Application Context<\/code> \u914d\u9519\uff0c\u8bbf\u95ee\u5730\u5740\u5c11\u4e86\u6216\u591a\u4e86\u524d\u7f00<\/li>\n\n\n\n- \u7c7b\u6ca1\u6709\u7f16\u8bd1\u8fdb
WEB-INF\/classes<\/code><\/li>\n\n\n\n- \u4f9d\u8d56\u6ca1\u6253\u8fdb\u53bb\uff0c\u5bfc\u81f4\u542f\u52a8\u5931\u8d25\u540e\u8bef\u4ee5\u4e3a\u662f 404<\/li>\n<\/ul>\n\n\n\n
\u4f9d\u8d56\u548c\u8bf7\u6c42\u53d1\u653e<\/h2>\n\n\n\n
\u5f15\u5165 Servlet API\uff0c\u5728 Maven \u4e2d\uff0cServlet API \u901a\u5e38\u8fd9\u6837\u914d\u7f6e\uff1a<\/p>\n\n\n\n
<dependency>\n <groupId>javax.servlet<\/groupId>\n <artifactId>javax.servlet-api<\/artifactId>\n <version>4.0.1<\/version>\n <scope>provided<\/scope>\n<\/dependency><\/code><\/pre>\n\n\n\n\u8fd9\u91cc
scope<\/code> \u5fc5\u987b\u662fprovided<\/code>\uff0c\u539f\u56e0\u662f\uff1a<\/p>\n\n\n\n- \n
- \u7f16\u8bd1\u65f6\u9700\u8981\u8fd9\u4e2a\u4f9d\u8d56<\/li>\n\n\n\n
- \u8fd0\u884c\u65f6 Tomcat \u5df2\u7ecf\u81ea\u5e26 Servlet API(lib\u76ee\u5f55\u4e0b\u7684servlet.jar)<\/li>\n\n\n\n
- \u5982\u679c\u518d\u628a\u5b83\u6253\u8fdb\u9879\u76ee\u91cc\uff0c\u5bb9\u6613\u53d1\u751f\u7248\u672c\u51b2\u7a81<\/li>\n<\/ul>\n\n\n\n
Servlet \u7684\u4e09\u79cd\u5f00\u53d1\u65b9\u5f0f<\/h3>\n\n\n\n
\u65b9\u5f0f<\/th> \u8bf4\u660e<\/th> \u662f\u5426\u63a8\u8350<\/th><\/tr><\/thead> \u5b9e\u73b0 Servlet<\/code> \u63a5\u53e3<\/td>\u6700\u5e95\u5c42\uff0c\u65b9\u6cd5\u6700\u591a<\/td> \u4e0d\u63a8\u8350\u4f5c\u4e3a\u5165\u95e8\u5199\u6cd5<\/td><\/tr> \u7ee7\u627f GenericServlet<\/code><\/td>\u5c4f\u853d\u90e8\u5206\u6a21\u677f\u4ee3\u7801<\/td> \u4e00\u822c\u4e86\u89e3\u5373\u53ef<\/td><\/tr> \u7ee7\u627f HttpServlet<\/code><\/td>\u9002\u5408 HTTP \u8bf7\u6c42\u5904\u7406<\/td> \u63a8\u8350<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \u5728 Web \u5f00\u53d1\u91cc\uff0c\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u90fd\u5e94\u8be5\u76f4\u63a5\u7ee7\u627f
HttpServlet<\/code>\u3002<\/p>\n\n\n\n\u793a\u4f8b\uff1a<\/p>\n\n\n\n
@WebServlet(\"\/hello\")\npublic class HelloServlet extends HttpServlet {\n\n @Override\n protected void doGet(HttpServletRequest req, HttpServletResponse resp)\n throws ServletException, IOException {\n resp.setContentType(\"text\/plain;charset=UTF-8\");\n resp.getWriter().write(\"Hello Servlet\");\n }\n}<\/code><\/pre>\n\n\n\n\u8bbf\u95ee\uff1a<\/p>\n\n\n\n
http://localhost:8080\/\u5e94\u7528\u4e0a\u4e0b\u6587\/hello<\/code><\/pre>\n\n\n\n\u5982\u679c\u9875\u9762\u80fd\u770b\u5230
Hello Servlet<\/code>\uff0c\u8bf4\u660e\u6574\u4e2a\u94fe\u8def\u5df2\u7ecf\u901a\u4e86\u3002<\/p>\n\n\n\n\u8bf7\u6c42\u5206\u53d1\u6d41\u7a0b<\/strong><\/h3>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u6839\u636e\u8bf7\u6c42\u62a5\u6587\u4e2d\u7684\u8bf7\u6c42\u884c\u4e2d\u7684\u8bf7\u6c42\u65b9\u6cd5\u7684\u4e0d\u540c\uff0c\u6267\u884c\u4e0d\u540c\u7684doXXX\u65b9\u6cd5\uff0cServlet\u7684\u6838\u5fc3\u5f00\u53d1\u5c31\u662f\u91cd\u5199\u7236\u7c7b\u4e2d\u7684doXXX\u65b9\u6cd5<\/p>\n\n\n\n
Servlet\u88ab\u591a\u7ebf\u7a0b\u8bbf\u95ee\uff0c\u6240\u4ee5\u9700\u8981\u4fdd\u8bc1\u7ebf\u7a0b\u5b89\u5168\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u00a0GET \u4e0e POST \u7684\u57fa\u672c\u5206\u5de5<\/strong><\/h3>\n\n\n\n
\u65b9\u6cd5<\/th> \u5e38\u89c1\u7528\u9014<\/th> \u7279\u70b9<\/th><\/tr><\/thead> GET<\/td> \u67e5\u8be2\u3001\u8bbf\u95ee\u9875\u9762<\/td> \u53c2\u6570\u901a\u5e38\u8ddf\u5728 URL \u540e<\/td><\/tr> POST<\/td> \u63d0\u4ea4\u8868\u5355\u3001\u63d0\u4ea4\u6570\u636e<\/td> \u53c2\u6570\u901a\u5e38\u5728\u8bf7\u6c42\u4f53\u4e2d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \u4e00\u4e2a\u5e38\u89c1\u5199\u6cd5\u662f\uff1a<\/p>\n\n\n\n
@Override\nprotected void doPost(HttpServletRequest req, HttpServletResponse resp)\n throws ServletException, IOException {\n doGet(req, resp);\n}<\/code><\/pre>\n\n\n\n\u8fd9\u8868\u793a\u201c\u5148\u7edf\u4e00\u5230\u540c\u4e00\u5957\u5904\u7406\u903b\u8f91\u201d\u3002 \u4f46\u8981\u6ce8\u610f\uff1a\u53ea\u6709\u5f53 GET \u548c POST \u7684\u4e1a\u52a1\u8bed\u4e49\u786e\u5b9e\u4e00\u81f4\u65f6\uff0c\u624d\u9002\u5408\u8fd9\u6837\u5199\u3002<\/p>\n\n\n\n
@WebServlet<\/code>\u00a0\u4e0e URL \u6620\u5c04\u89c4\u5219<\/h2>\n\n\n\n@WebServlet<\/code> \u5e38\u7528\u5c5e\u6027<\/strong><\/h3>\n\n\n\n@Target(ElementType.TYPE)\n@Retention(RetentionPolicy.RUNTIME)\npublic @interface WebServlet {\n String name() default \"\";\n String[] value() default {};\n String[] urlPatterns() default {};\n int loadOnStartup() default -1;\n WebInitParam[] initParams() default {};\n}<\/code><\/pre>\n\n\n\n\u6700\u5e38\u7528\u7684\u51e0\u4e2a\u5c5e\u6027\u662f\uff1a<\/p>\n\n\n\n
\u5c5e\u6027<\/th> \u4f5c\u7528<\/th><\/tr><\/thead> value<\/code><\/td>\u6307\u5b9a URL \u6620\u5c04\u8def\u5f84<\/td><\/tr> urlPatterns<\/code><\/td>\u4e0e value<\/code> \u7b49\u4ef7<\/td><\/tr>loadOnStartup<\/code><\/td>\u6307\u5b9a\u542f\u52a8\u65f6\u662f\u5426\u63d0\u524d\u52a0\u8f7d<\/td><\/tr> initParams<\/code><\/td>\u6307\u5b9a Servlet \u7684\u521d\u59cb\u5316\u53c2\u6570<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n value<\/code>\u00a0\u548c\u00a0urlPatterns<\/code>\u5e38\u89c1\u5199\u6cd5<\/strong><\/h3>\n\n\n\n@WebServlet(\"\/hello\")\npublic class HelloServlet extends HttpServlet {}<\/code><\/pre>\n\n\n\n\u5f53\u53ea\u5199\u4e00\u4e2a
value<\/code> \u5c5e\u6027\u65f6\uff0c\u53ef\u4ee5\u7701\u7565value =<\/code>\u3002\u4ee5\u4e0b\u5199\u6cd5\u4e5f\u6210\u7acb\uff1a<\/p>\n\n\n\n@WebServlet(value = \"\/hello\", loadOnStartup = 1)\npublic class HelloServlet extends HttpServlet {}<\/code><\/pre>\n\n\n\n\u591a\u4e2a\u8def\u5f84\u6620\u5c04\u5230\u540c\u4e00\u4e2a Servlet \u4e5f\u53ef\u4ee5\uff1a<\/p>\n\n\n\n
@WebServlet({\"\/hello\", \"\/hi\", \"\/greeting\"})\npublic class HelloServlet extends HttpServlet {}<\/code><\/pre>\n\n\n\nURL-pattern \u56db\u79cd\u5e38\u89c1\u5f62\u5f0f<\/strong><\/h3>\n\n\n\n
\u7c7b\u578b<\/th> \u793a\u4f8b<\/th> \u8bf4\u660e<\/th><\/tr><\/thead> \u7cbe\u786e\u5339\u914d<\/td> \/hello<\/code><\/td>\u53ea\u5339\u914d\u6307\u5b9a\u8def\u5f84<\/td><\/tr> \u8def\u5f84\u5339\u914d<\/td> \/user\/*<\/code><\/td>\u5339\u914d\u8fd9\u4e00\u524d\u7f00\u4e0b\u7684\u8def\u5f84<\/td><\/tr> \u6269\u5c55\u540d\u5339\u914d<\/td> *.do<\/code><\/td>\u5339\u914d\u6307\u5b9a\u6269\u5c55\u540d<\/td><\/tr> \u7f3a\u7701\u5339\u914d<\/td> \/<\/code><\/td>\u5339\u914d\u6ca1\u6709\u88ab\u5176\u4ed6\u89c4\u5219\u5904\u7406\u7684\u8bf7\u6c42<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \u5339\u914d\u4f18\u5148\u7ea7\u9075\u5faa<\/strong>\uff1a\u7cbe\u786e\u5339\u914d > \u8def\u5f84\u5339\u914d > \u6269\u5c55\u540d\u5339\u914d > \u7f3a\u7701\u5339\u914d<\/p>\n\n\n\n
\u00a0\u7f3a\u7701 Servlet \u4e0e\u9759\u6001\u8d44\u6e90<\/h3>\n\n\n\n
Tomcat \u5185\u90e8\u6709\u4e00\u4e2a\u9ed8\u8ba4 Servlet\uff0c\u4e13\u95e8\u5904\u7406\u9759\u6001\u8d44\u6e90\u3002<\/p>\n\n\n\n
\u8fd9\u610f\u5473\u7740\uff1a<\/p>\n\n\n\n
- \n
- \u6d4f\u89c8\u5668\u8bbf\u95ee\u56fe\u7247\u3001CSS\u3001JS \u7b49\u9759\u6001\u8d44\u6e90\u65f6\uff0c\u901a\u5e38\u4e0d\u662f\u4f60\u81ea\u5df1\u5199\u7684 Servlet \u5728\u5904\u7406<\/li>\n\n\n\n
- \u5982\u679c\u4f60\u81ea\u5df1\u5199\u4e86
@WebServlet(\"\/\")<\/code>\uff0c\u5c31\u53ef\u80fd\u628a\u9ed8\u8ba4\u9759\u6001\u8d44\u6e90\u5904\u7406\u903b\u8f91\u201c\u622a\u80e1\u201d<\/li>\n<\/ul>\n\n\n\n\u793a\u4f8b\uff1a<\/p>\n\n\n\n
@WebServlet(\"\/\")\npublic class MyDefaultServlet extends HttpServlet {\n @Override\n protected void doGet(HttpServletRequest req, HttpServletResponse resp)\n throws IOException {\n resp.setContentType(\"text\/html;charset=UTF-8\");\n resp.getWriter().write(\"<h1>\u81ea\u5b9a\u4e49\u7f3a\u7701\u5904\u7406<\/h1>\");\n }\n}<\/code><\/pre>\n\n\n\n\u8fd9\u7c7b\u5199\u6cd5\u5728\u6846\u67b6\u5185\u90e8\u6709\u5b83\u7684\u7528\u9014\uff0c\u4f46\u5bf9\u4e8e\u5165\u95e8\u9636\u6bb5\u6765\u8bf4\uff0c\u8981\u5148\u77e5\u9053\u98ce\u9669\uff1a<\/p>\n\n\n\n
- \n
- \u9759\u6001\u8d44\u6e90\u53ef\u80fd\u8bbf\u95ee\u4e0d\u5230<\/li>\n\n\n\n
- \u6240\u6709\u672a\u547d\u4e2d\u7684\u8bf7\u6c42\u90fd\u4f1a\u843d\u5230\u8fd9\u4e2a Servlet<\/li>\n<\/ul>\n\n\n\n
Servlet \u751f\u547d\u5468\u671f\u4e0e\u5355\u4f8b\u591a\u7ebf\u7a0b\u6a21\u578b<\/h2>\n\n\n\n
Servlet \u7684\u751f\u547d\u5468\u671f\u7531\u5bb9\u5668\u7ba1\u7406\uff0c\u4e0d\u7531\u6211\u4eec\u624b\u52a8\u63a7\u5236\u3002\u53ef\u4ee5\u7528\u8fd9\u6761\u94fe\u8def\u7406\u89e3\uff1a<\/p>\n\n\n\n
\u52a0\u8f7d\u7c7b -> \u521b\u5efa\u5b9e\u4f8b -> init() -> service() \u591a\u6b21\u8c03\u7528 -> destroy()<\/code><\/pre>\n\n\n\n\u5404\u4e2a\u65b9\u6cd5\u7684\u6267\u884c\u65f6\u673a<\/h3>\n\n\n\n
\u65b9\u6cd5<\/th> \u6267\u884c\u6b21\u6570<\/th> \u8c01\u8c03\u7528<\/th> \u5178\u578b\u7528\u9014<\/th><\/tr><\/thead> \u6784\u9020\u65b9\u6cd5<\/td> 1 \u6b21<\/td> \u5bb9\u5668<\/td> \u521b\u5efa\u5bf9\u8c61<\/td><\/tr> init()<\/code><\/td>1 \u6b21<\/td> \u5bb9\u5668<\/td> \u521d\u59cb\u5316\u8d44\u6e90<\/td><\/tr> service()<\/code><\/td>\u591a\u6b21<\/td> \u5bb9\u5668<\/td> \u5206\u53d1\u8bf7\u6c42<\/td><\/tr> destroy()<\/code><\/td>1 \u6b21<\/td> \u5bb9\u5668<\/td> \u91ca\u653e\u8d44\u6e90<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \u751f\u547d\u5468\u671f\u89c2\u5bdf\u793a\u4f8b<\/strong><\/h3>\n\n\n\n
@WebServlet(value = \"\/life\", loadOnStartup = 1)\npublic class LifeServlet extends HttpServlet {\n\n public LifeServlet() {\n System.out.println(\"1. \u6784\u9020\u65b9\u6cd5\u6267\u884c\");\n }\n\n @Override\n public void init() throws ServletException {\n System.out.println(\"2. init() \u6267\u884c\");\n }\n\n @Override\n protected void doGet(HttpServletRequest req, HttpServletResponse resp)\n throws IOException {\n System.out.println(\"3. doGet() \u6267\u884c\");\n resp.getWriter().write(\"ok\");\n }\n\n @Override\n public void destroy() {\n System.out.println(\"4. destroy() \u6267\u884c\");\n }\n}<\/code><\/pre>\n\n\n\n\u65e5\u5fd7\u4e2d\u53ef\u4ee5\u89c2\u5bdf\u5230\uff1a<\/p>\n\n\n\n
- \n
- Tomcat \u542f\u52a8\u65f6\uff0c\u82e5\u914d\u7f6e\u4e86
loadOnStartup<\/code>\uff0c\u4f1a\u5148\u6267\u884c\u6784\u9020\u548cinit()<\/code><\/li>\n\n\n\n- \u6bcf\u8bbf\u95ee\u4e00\u6b21
\/life<\/code>\uff0c\u4f1a\u6267\u884c\u4e00\u6b21doGet()<\/code><\/li>\n\n\n\n- \u6b63\u5e38\u5173\u95ed\u5bb9\u5668\u65f6\uff0c\u624d\u4f1a\u6267\u884c
destroy()<\/code><\/li>\n<\/ul>\n\n\n\nloadOnStartup<\/code> \u7684\u610f\u4e49<\/strong><\/h3>\n\n\n\nloadOnStartup<\/code> \u9ed8\u8ba4\u662f-1<\/code>\uff0c\u8868\u793a\u7b2c\u4e00\u6b21\u8bbf\u95ee\u65f6\u518d\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n - \u6bcf\u8bbf\u95ee\u4e00\u6b21
- Tomcat \u542f\u52a8\u65f6\uff0c\u82e5\u914d\u7f6e\u4e86
- \u7c7b\u6ca1\u6709\u7f16\u8bd1\u8fdb
- \u6dfb\u52a0
- \u7f16\u8bd1\u540e\u7684
- \u6d4f\u89c8\u5668\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee
![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-6-1024x459.png\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-7-1024x473.png\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/05-1warexploded\u7684\u7ed3\u6784-1024x851.jpg\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/05-2\u5f00\u53d1\u548c\u7f16\u8bd1\u7684\u8def\u5f84\u5bf9\u5e94.jpg\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/05-3idea\u4e2d\u4f7f\u7528Tomcat\u505a\u865a\u62df\u6620\u5c04-1024x829.jpg\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/05-4idea\u4e2d\u4f7f\u7528Tomcat\u4e34\u65f6\u6587\u4ef6\u5939-1024x609.jpg\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-8-1024x450.png\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-9-1024x586.png\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-10-1024x209.png\")
<\/div><\/figure>\n\n\n\n![\"\"](\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/04\/image-11-1024x297.png\")
<\/div><\/figure>\n\n\n\n