{"id":463,"date":"2026-04-25T15:29:00","date_gmt":"2026-04-25T07:29:00","guid":{"rendered":"https:\/\/larkdrop.cafe\/?p=463"},"modified":"2026-06-22T16:01:10","modified_gmt":"2026-06-22T08:01:10","slug":"jdbc","status":"publish","type":"post","link":"https:\/\/larkdrop.cafe\/index.php\/2026\/04\/25\/jdbc\/","title":{"rendered":"JDBC"},"content":{"rendered":"\n

\u51c6\u5907\u6570\u636e<\/p>\n\n\n\n

DROP TABLE IF EXISTS `market_user`;\nCREATE TABLE `market_user`  (\n  `id` int NOT NULL AUTO_INCREMENT,\n  `username` varchar(63) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '\u7528\u6237\u540d\u79f0',\n  `password` varchar(63) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u7528\u6237\u5bc6\u7801',\n  `gender` tinyint NOT NULL DEFAULT 0 COMMENT '\u6027\u522b\uff1a0 \u672a\u77e5\uff0c 1\u7537\uff0c 1 \u5973',\n  `birthday` date NULL DEFAULT NULL COMMENT '\u751f\u65e5',\n  `last_login_time` datetime NULL DEFAULT NULL COMMENT '\u6700\u8fd1\u4e00\u6b21\u767b\u5f55\u65f6\u95f4',\n  `last_login_ip` varchar(63) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u6700\u8fd1\u4e00\u6b21\u767b\u5f55IP\u5730\u5740',\n  `user_level` tinyint NULL DEFAULT 0 COMMENT '0 \u666e\u901a\u7528\u6237\uff0c1 VIP\u7528\u6237\uff0c2 \u9ad8\u7ea7VIP\u7528\u6237',\n  `nickname` varchar(63) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u7528\u6237\u6635\u79f0\u6216\u7f51\u7edc\u540d\u79f0',\n  `mobile` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u7528\u6237\u624b\u673a\u53f7\u7801',\n  `avatar` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u7528\u6237\u5934\u50cf\u56fe\u7247',\n  `weixin_openid` varchar(63) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u5fae\u4fe1\u767b\u5f55openid',\n  `session_key` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '' COMMENT '\u5fae\u4fe1\u767b\u5f55\u4f1a\u8bddKEY',\n  `status` tinyint NOT NULL DEFAULT 0 COMMENT '0 \u53ef\u7528, 1 \u7981\u7528, 2 \u6ce8\u9500',\n  `add_time` datetime NULL DEFAULT NULL COMMENT '\u521b\u5efa\u65f6\u95f4',\n  `update_time` datetime NULL DEFAULT NULL COMMENT '\u66f4\u65b0\u65f6\u95f4',\n  `deleted` tinyint(1) NULL DEFAULT 0 COMMENT '\u903b\u8f91\u5220\u9664',\n  PRIMARY KEY (`id`) USING BTREE,\n  UNIQUE INDEX `user_name`(`username` ASC) USING BTREE\n) ENGINE = InnoDB AUTO_INCREMENT = 81 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = '\u7528\u6237\u8868' ROW_FORMAT = DYNAMIC;\n\n-- ----------------------------\n-- Records of market_user\n-- ----------------------------\nINSERT INTO `market_user` VALUES (1, 'user123', 'zhangsan', 1, NULL, '2023-08-18 12:11:40', '58.48.227.81', 0, 'user123', '', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2019-04-20 22:17:43', '2023-08-18 12:11:40', 0);\nINSERT INTO `market_user` VALUES (3, 'wuyanzu', '123456', 0, NULL, '2023-06-20 10:10:35', '111.175.54.67', 0, '\u738b\u9053\u5434\u5f66\u7956', '13125136973', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-14 22:08:44', '2023-06-20 10:59:42', 0);\nINSERT INTO `market_user` VALUES (4, 'prc123', '$2a$10$COk1E1Bl3Muyh2KDyJDaf..T9tF0SsW2l3TIAqUZ0L8hVHjOQwxGu', 0, NULL, '2023-08-10 23:24:00', '171.113.246.131', 0, 'prc123', '18356813839', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 10:42:26', '2023-08-10 23:24:00', 0);\nINSERT INTO `market_user` VALUES (5, 'gong15', '$2a$10$bT9i3Hll8BJkpVTl8VDxC.0c0vOHN3rStxWvOPZb\/Tjyuf2jGAJGq', 0, NULL, '2023-08-11 11:27:43', '94.124.79.238', 0, 'gong15', '16652042056', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 13:50:33', '2023-08-11 11:27:43', 0);\nINSERT INTO `market_user` VALUES (6, 'userDev', '$2a$10$7QhrMy8Z5ivXtWn9KF8kMuMGNT4oXvAW8xUXtfsA85eV1ISBk5b66', 0, NULL, '2023-06-19 22:58:07', '111.175.54.67', 0, 'userDev', '19901758884', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 14:18:28', '2023-06-19 22:58:07', 0);\nINSERT INTO `market_user` VALUES (7, 'chuliuxiang ', '$2a$10$ck9HG4.YG.8P6v.kPxtCT.PEuUOAgImMe9N.MXfIquqR8y2l6D6LS', 0, NULL, '2023-06-19 19:45:19', '111.175.54.67', 0, '\u957f\u98ce', '15884987189', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 15:27:18', '2023-06-19 19:45:19', 0);\nINSERT INTO `market_user` VALUES (8, 'test666', '$2a$10$XZWF0ug8G3VOPaPJPa4oLOC73jh6Nduqj4WD5uehewzLHhTHYIDAe', 0, NULL, '2023-06-20 09:42:40', '111.175.54.67', 0, 'test666', '18953390164', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 17:25:00', '2023-06-20 09:42:40', 0);\nINSERT INTO `market_user` VALUES (9, 'zbt123', '$2a$10$XkGSJRe7HcDVF.RK8aPDR.ngE\/L2BAQ25w0005ynZFy698VflqPmi', 0, NULL, '2023-08-10 23:25:13', '171.113.246.131', 0, 'zbt123', '18291788583', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 20:33:46', '2023-08-10 23:25:13', 0);\nINSERT INTO `market_user` VALUES (10, 'wcp123', '$2a$10$qX4J\/8Qg3.WvcHtRqEJ.Luz9CYxHVtMXp1L1YCXQdIG.Euj1VluGC', 0, NULL, '2023-06-20 15:28:18', '111.175.54.67', 0, 'wcp123', '17319906315', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-15 20:35:15', '2023-06-20 15:28:18', 0);\nINSERT INTO `market_user` VALUES (11, 'kkkira', '$2a$10$90kssTlguZkrUk.wBGG6EuidyWHA7MYJLBTVDAgvwZbVE.cw9mYnC', 0, NULL, '2023-06-20 10:47:57', '111.175.54.67', 0, 'kkkira', '18247931028', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 08:56:00', '2023-06-20 10:47:57', 0);\nINSERT INTO `market_user` VALUES (12, 'wcwcwc', '$2a$10$M.54d\/\/ylnT1nOJEBCQ9j.ByFk0HfBjHqE1mDVsxBbDPuqwzn8vfa', 0, NULL, '2023-06-20 10:04:44', '111.175.54.67', 0, 'wcwcwc', '15730336955', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 09:00:00', '2023-06-20 10:04:44', 0);\nINSERT INTO `market_user` VALUES (13, 'root123', '$2a$10$F4bRsKrfG6OkalkSYcY2PeuLQU502aetU0QKJ9szbI30uMFKIZ6bi', 0, NULL, '2023-06-19 10:42:23', '111.175.54.67', 0, 'root123', '15093474161', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 09:07:21', '2023-06-19 14:01:25', 0);\nINSERT INTO `market_user` VALUES (14, 'jiuzhe123', '$2a$10$nS3n\/q7jx1l654QvH03Z\/OIo6PNqA8NK4TOcO9IznY5ntsz5fS9y.', 0, NULL, '2023-06-19 19:49:25', '111.175.54.67', 0, 'jiuzhe123', '', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 13:59:24', '2023-06-19 19:49:25', 0);\nINSERT INTO `market_user` VALUES (15, 'gym123', 'gym123', 0, NULL, '2023-06-16 14:00:40', '111.175.54.67', 1, 'gym123', '19829483892', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 14:00:40', '2023-06-18 12:02:45', 0);\nINSERT INTO `market_user` VALUES (16, 'root1234', '$2a$10$KOQAqSuRA7ONSasdIZX9Iuf9qqMkAlySMHASa208HXDeOERtIx3Eq', 0, NULL, '2023-06-16 14:04:34', '111.175.54.67', 0, 'root1234', '13101708526', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 14:04:34', '2023-06-16 14:04:34', 0);\nINSERT INTO `market_user` VALUES (17, 'lwb123', '$2a$10$ihbmrftjKPuXnjSnL7F7LeOHnI\/N5Yi\/UX0KzrB\/zFCkO6o1ASzru', 0, NULL, '2023-08-11 11:24:19', '171.113.246.131', 0, 'lwb123', '18657677196', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 17:08:26', '2023-08-11 11:24:19', 0);\nINSERT INTO `market_user` VALUES (18, 'lxf123', '$2a$10$X\/ecKXHqW9rKs2byXlyJ8O293chEAkomdJyTZOzzZUj7LC7TtXuoq', 0, NULL, '2023-06-20 16:12:30', '111.175.54.67', 2, 'lxf123', '18703333714', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 1, '2023-06-16 20:59:33', '2023-06-20 16:12:30', 0);\nINSERT INTO `market_user` VALUES (19, 'gatva1', '$2a$10$QcZr62bcHl4yF9JVTgxTpu1Ejms.v\/F7jKmvwnQCcdouTYnq.b56a', 0, NULL, '2023-06-16 21:26:49', '103.47.100.211', 0, 'gatva1', '17366620700', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-16 21:26:49', '2023-06-16 21:26:49', 0);\nINSERT INTO `market_user` VALUES (20, 'kangkang', '$2a$10$i4Admnm7pYQLExX5yPeiMePmcVelYtQtRtBQ7NHsjJG55Y9Utq746', 0, NULL, '2023-06-20 16:54:32', '111.175.54.67', 0, 'kangkang', '18253095209', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-17 16:50:55', '2023-06-20 16:54:32', 0);\nINSERT INTO `market_user` VALUES (21, 'admin123', '$2a$10$tUK1H15cNXvrS8.uQ0uJX.bpO5i3MsD5w2zclTbsSYOJGcffMI5vK', 0, NULL, '2023-08-12 17:16:42', '171.43.248.189', 0, 'admin123', '18342284085', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-17 22:01:26', '2023-08-12 17:16:42', 0);\nINSERT INTO `market_user` VALUES (22, '123456', '$2a$10$n0Gs00i0WiUCNYqAaEDcNefOZw2H02QnRXeiavB.nIVDvRnHL3Ipi', 0, NULL, '2023-06-19 09:36:11', '111.175.54.67', 0, '123456', '18071721834', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-18 18:22:42', '2023-06-19 09:38:45', 0);<\/code><\/pre>\n\n\n\n
\u4ecb\u7ecd<\/h2>\n\n\n\n
\u6570\u636e\u5e93\u7684\u8bbf\u95ee\u8fc7\u7a0b<\/h3>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
JDBC\u662f\u4ec0\u4e48<\/h3>\n\n\n\n
JDBC\uff08Java DataBase Connectivity\uff09\u662fJava\u7a0b\u5e8f\u4e0e\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u7684\u4e00\u79cd\u6807\u51c6\u63a5\u53e3\u3002\u5b83\u5b9a\u4e49\u4e86\u4e00\u7ec4Java API\uff0c\u4f7f\u5f97Java\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e9bAPI\u6765\u8fde\u63a5\u548c\u64cd\u4f5c\u5404\u79cd\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff08\u5982MySQL\u3001Oracle\u3001SQL Server\u7b49\uff09\uff0c\u6267\u884cSQL\u8bed\u53e5\u5e76\u5904\u7406\u67e5\u8be2\u7ed3\u679c\u3002JDBC\u63d0\u4f9b\u4e86\u4e00\u79cd\u8de8\u5e73\u53f0\u3001\u53ef\u79fb\u690d\u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\u6570\u636e\u5e93\uff0c\u4f7f\u5f97Java\u7a0b\u5e8f\u53ef\u4ee5\u4e0e\u4e0d\u540c\u7684\u6570\u636e\u5e93\u8fdb\u884c\u901a\u4fe1\u800c\u65e0\u9700\u6539\u53d8\u4ee3\u7801\u3002JDBC\u7684\u4e3b\u8981\u4f18\u70b9\u5305\u62ec\uff1a\u53ef\u79fb\u690d\u6027\u3001\u53ef\u9760\u6027\u3001\u5b89\u5168\u6027\u548c\u6613\u4e8e\u4f7f\u7528\u3002<\/p>\n\n\n\n
JDBC\u5177\u4f53\u6307\u7684\u5c31\u662f Java\u7684\u4e00\u5957\u6807\u51c6\u7684\u8fde\u63a5\u6570\u636e\u5e93\u7684\u63a5\u53e3\u3002<\/strong><\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u90a3\u4e48\u6807\u51c6\u7684\u63a5\u53e3\u5177\u4f53\u5728\u54ea\u513f\u5462\uff1f\u6307\u7684\u662f\u54ea\u4e9b\u63a5\u53e3\u5462\uff1f\uff08rt.jar\u5185\u90e8\u7684\uff09<\/p>\n\n\n\n
    \n
  • java.sql<\/code><\/li>\n\n\n\n
  • javax.sql<\/code><\/li>\n<\/ul>\n\n\n\n
    JDBC\u600e\u4e48\u7528<\/h2>\n\n\n\n
    \u7b2c\u4e00\u4e2aJDBC\u7a0b\u5e8f<\/h3>\n\n\n\n
      \n
    • \u65b0\u5efa\u9879\u76ee<\/li>\n\n\n\n
    • \u5bfc\u5305<\/li>\n<\/ul>\n\n\n\n
      \u5bfc\u5305\u662f\u6307\u5bfc\u5165\u5176\u4ed6\u7684\u4eba\u6216\u8005\u662f\u7ec4\u7ec7\u5199\u7684\u4ee3\u7801\u3002<\/p>\n\n\n\n
      \n
      \u5982\u4f55\u5bfc\u5305\u5462\uff1f<\/p>\n<\/blockquote>\n\n\n\n
      \n
      1. \u4e0b\u8f7d\u5305<\/p>\n<\/blockquote>\n\n\n\n
      \n
      [\u4e0b\u8f7d\u4ed3\u5e93\u5730\u5740](https:\/\/mvnrepository.com\/)<\/p>\n<\/blockquote>\n\n\n\n
      \n
      [MySQL\u9a71\u52a8\u5305\u4e0b\u8f7d\u5730\u5740](https:\/\/mvnrepository.com\/artifact\/mysql\/mysql-connector-java\/5.1.47)<\/p>\n<\/blockquote>\n\n\n\n
      \n
      2. \u628a\u5305\u590d\u5236\u5230\u9879\u76ee\u4e2d\uff0c\u5e76\u4e14\u52a0\u8f7d\u8fdb\u6765<\/p>\n<\/blockquote>\n\n\n\n
      \n
      .jar<\/code>\uff1a \u8fd9\u4e2a\u683c\u5f0f\u662f\u4e00\u79cd\u538b\u7f29\u683c\u5f0f\uff0c\u548c .zip\uff0c.rar\u662f\u7c7b\u4f3c\u7684\uff0c\u8fd9\u79cd\u7c7b\u578b\u7684\u6587\u4ef6\uff0c\u53ef\u4ee5\u88abJava\u8bc6\u522b\u5e76\u4e14\u8fd0\u884c\u3002<\/p>\n<\/blockquote>\n\n\n\n
      \n
      .jar<\/code>\u6587\u4ef6\u4e2d\u90fd\u662f\u4e00\u4e9b .class<\/code>\u6587\u4ef6\uff0c\u662f\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\u7684<\/p>\n<\/blockquote>\n\n\n\n
      \n
      \u63a5\u4e0b\u6765\uff0c\u9700\u8981\u628a\u5bf9\u5e94\u7684jar\u5305\u6dfb\u52a0\u5230library\u91cc\u9762\u53bb\u3002\u5bf9\u7740jar\u5305\u53f3\u952e<\/p>\n<\/blockquote>\n\n\n\n
      \"\"<\/div><\/figure>\n\n\n\n
        \n
      • \u7f16\u5199\u5e94\u7528\u7a0b\u5e8f<\/li>\n<\/ul>\n\n\n\n
          \/\/ 1. \u52a0\u8f7d\u9a71\u52a8  {@Link java.sql.Driver   impl : com.mysql.cj.jdbc.Driver}\n  DriverManager.registerDriver(new Driver());\n  \n  \n  \/\/        String url = \"\u534f\u8bae + ip + \u7aef\u53e3 + \u8def\u5f84 + \u53c2\u6570\";\n  String url = \"jdbc:mysql:\/\/localhost:3306\/market?useSSL=false&characterEncoding=utf8&serverTimezone=GMT%2B8\";\n  String username = \"root\";\n  String password = \"123456\";\n  \n  \/\/ 2. \u53d1\u9001\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u5efa\u7acb\u8fde\u63a5\n  \/\/ \u8fd4\u56de\u7684\u5f53\u524d\u662f\u4e00\u4e2aConnection\u63a5\u53e3\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u5728\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u8fd4\u56de\u662fConnection\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\n  Connection connection = DriverManager.getConnection(url, username, password);\n  \n  \/\/ 3. \u83b7\u53d6statement\u5bf9\u8c61\n  Statement statement = connection.createStatement();\n  \n  \/\/ 4. \u53d1\u9001SQL\u8bed\u53e5\n  int affectedRows = statement.executeUpdate(\"INSERT INTO `market_user` VALUES (23, 'stone1024', '$2a$10$n0Gs00i0WiUCNYqAaEDcNefOZw2H02QnRXeiavB.nIVDvRnHL3Ipi', 0, NULL, '2023-06-19 09:36:11', '111.175.54.67', 0, '123456', '13971721834', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-18 18:22:42', '2023-06-19 09:38:45', 0);\");\n  \n  \/\/ 5. \u89e3\u6790\u7ed3\u679c\u96c6\n  System.out.println(\"affectedRows:\" + affectedRows);\n  \n  \/\/ 6. \u65ad\u5f00\u8fde\u63a5\n  statement.close();\n  connection.close();<\/code><\/pre>\n\n\n\n
        MySQL5.7 \u2192 \u9a71\u52a8\u5305 5.1.xx \u2192 com.mysql.jdbc.Driver<\/p>\n\n\n\n
        MySQL8 \u2192 \u9a71\u52a8\u5305 8.0.xx \u2192 com.mysql.cj.jdbc.Driver<\/p>\n\n\n\n
        API<\/h3>\n\n\n\n
        \n
        \u67e5\u770b\u7c7b\u4e2d\u6240\u6709\u65b9\u6cd5\u7684\u5feb\u6377\u952e\uff1actrl + F12<\/p>\n<\/blockquote>\n\n\n\n
        \"\"<\/div><\/figure>\n\n\n\n
        \n
        DriverManager\u7528\u6765\u521b\u5efaConnection\uff0cConnection\u597d\u6bd4\u662f\u6865\uff0c\u90a3DriverManager\u597d\u6bd4\u662f\u65bd\u5de5\u5355\u4f4d<\/p>\n<\/blockquote>\n\n\n\n
        \n
        \u6865\u4e0a\u53ef\u4ee5\u901a\u8fc7\u6c7d\u8f66\uff0c\u901a\u8fc7Connection\u53ef\u4ee5\u521b\u5efa\u51fa\u591a\u4e2a\u4e0d\u540c<\/code>\u7684Statement\uff0c\u90a3\u4e48Statement\u597d\u6bd4\u5c31\u662f\u6c7d\u8f66<\/p>\n<\/blockquote>\n\n\n\n
        \n
        \u6c7d\u8f66\u4e0a\u53ef\u4ee5\u8f7d\u4eba\uff0cStatement\u4e0a\u4f1a\u627f\u8f7dSQL\uff0cSQL\u597d\u6bd4\u662f\u6c7d\u8f66\u4e0a\u7684\u4eba<\/p>\n<\/blockquote>\n\n\n\n
        \n
        \u6700\u7ec8SQL\u5c31\u4f1a\u5230\u8fbeSQL\u670d\u52a1\uff0c\u5e76\u4e14\u6267\u884c<\/p>\n<\/blockquote>\n\n\n\n
        \n
        \u5982\u679c\u6267\u884c\u7684\u662f\u67e5\u8be2\uff0c\u8fd4\u56de\u7684\u5c31\u662fResultSet\uff1b\u5982\u679c\u6267\u884c\u7684\u662f\u589e\u5220\u6539\uff0c\u8fd4\u56de\u7684\u5c31\u662fint\u7c7b\u578b\u7684\u503c(\u5f71\u54cd\u7684\u884c\u6570)<\/p>\n<\/blockquote>\n\n\n\n
        DriverManager<\/strong><\/p>\n\n\n\n
        \u9a71\u52a8\u7ba1\u7406\u5668\u3002\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u7ba1\u7406\u9a71\u52a8\uff0c\u83b7\u53d6\u8fde\u63a5<\/p>\n\n\n\n
        \/\/ \u6ce8\u518c\u9a71\u52a8 => \u5f53\u524d\u7684\nDriverManager.registerDriver(new Driver());\n\n\/\/ \u83b7\u53d6\u8fde\u63a5\n\/\/ \u5728\u4ee3\u7801\u5b9e\u9645\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u4e00\u5b9a\u4e0d\u53ef\u80fd\u5149\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u4e00\u5b9a\u662f\u4e00\u4e2a\u5b9e\u73b0\u7c7b\u3002\uff08\u662fMySQL\u63d0\u4f9b\u7684\u4e00\u4e2a\u5b9e\u73b0\u7c7b\u3002\uff09\n\/\/ \u83b7\u53d6\u5230\u7684\u8fde\u63a5\u5bf9\u8c61\u5b9e\u9645\u4e0a\u662f JDBC4Connection\uff08ConnectionImpl\uff09 \u5bf9\u8c61 \u2192 \u5b9e\u73b0Connection\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u5bf9\u8c61\nConnection conn = DriverManager.getConnection(String url,String username,String password);<\/code><\/pre>\n\n\n\n
        Connection<\/strong><\/p>\n\n\n\n
        \u6307\u4ee3\u8fde\u63a5\u5bf9\u8c61\u3002\u5728JDBC\u4e2d\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5728\u6211\u4eec\u4f7f\u7528JDBC\u7684\u65f6\u5019\uff0c\u5b9e\u9645\u4e0a\u5b9e\u73b0\u7c7b\u662f com.mysql.jdbc.JDBC4Connection | com.mysql.cj.jdbc.ConnectionImpl<\/code> \u5bf9\u8c61\u3002<\/p>\n\n\n\n
        \/\/ \u83b7\u53d6statement\n\/\/ \u901a\u8fc7statement\u5bf9\u8c61\u6765\u6267\u884cSQL\nStatement stat = connection.createStatement();\n\n\/\/ \u5173\u95ed\u8fde\u63a5\nconnection.close();\n\n\/\/ \u4e8b\u52a1\u76f8\u5173\u7684API\nconnection.commit();\nconnection.rollback();\nconnection.setAutoCommit(false);<\/code><\/pre>\n\n\n\n
        Statement<\/strong><\/p>\n\n\n\n
        \n
        The object used for executing a static SQL statement and returning the results it produces.<\/p>\n<\/blockquote>\n\n\n\n
        statement\u5bf9\u8c61\u5176\u5b9e\u5c31\u662f\u7528\u6765\u53bb\u6267\u884cSQL\u8bed\u53e5\uff0c\u5e76\u4e14\u8fd4\u56de\u8fd9\u4e2aSQL\u8bed\u53e5\u4ea7\u751f\u7684\u7ed3\u679c\u96c6\u3002\u5b9e\u9645\u4e0a\u6211\u4eec\u5728\u4f7f\u7528\u7684\u65f6\u5019\uff0c\u5176\u5b9e\u662f\u7528\u7684Statement\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b com.mysql.jdbc.StatementImpl<\/code><\/p>\n\n\n\n
        \/\/ \u6267\u884c\u589e\u5220\u6539\u7684\u65b9\u6cd5\u3002\u65b0\u589e\u6570\u636e\u7684SQL\uff0c\u5220\u9664\u6570\u636e\u7684SQL\uff0c\u4fee\u6539\u6570\u636e\u7684SQL\nint affectedRows = statement.executeUpdate(String updateSql);\n\n\/\/ \u6267\u884c\u67e5\u8be2\u7684\u65b9\u6cd5\nResultSet rs  = statement.executeQuery(String querySql);\n\n\/\/ \u62ff\u5230\u4e00\u4e2aResultSet\uff0c\u600e\u4e48\u4ece\u91cc\u9762\u83b7\u53d6\u6570\u636e\u3002 \u5f53\u4e00\u4e2a\u8fed\u4ee3\u5668\u7684\u65b9\u6cd5\u4f7f\u7528\u3002\n\n\/\/ \u5173\u95ed\nstatement.close();\n\n\n\/\/ \n\n\/\/ \u6267\u884csql\u8bed\u53e5 -> \u5982\u679c\u4e0d\u786e\u5b9a\u6267\u884c\u7684\u662f\u4ec0\u4e48\u8bed\u53e5\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528execute\u65b9\u6cd5\nBoolean ret = statement.execute(String sql);\n\n\/\/ \u5982\u679c ret == true\uff0c\u90a3\u4e48\u8bf4\u660e\u6267\u884c\u7684\u662f\u67e5\u8be2\u8bed\u53e5  statement.getResultSet();\n\/\/ \u5982\u679c ret == false\uff0c\u90a3\u4e48\u8bf4\u660e\u6267\u884c\u7684\u662f\u589e\u5220\u6539\u8bed\u53e5 statement.getUpdateCount();\n\/\/ \u83b7\u53d6\u5f71\u54cd\u7684\u884c\u6570: statement.getUpdateCount();\n\/\/ \u83b7\u53d6\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\uff1astatement.getResultSet();<\/code><\/pre>\n\n\n\n
        ResultSet<\/strong><\/p>\n\n\n\n
        \u8fd9\u4e2a\u5bf9\u8c61\u8868\u793a\u67e5\u8be2\u7684\u7ed3\u679c\u96c6\uff0c\u4e5f\u5c31\u662f\u4e0a\u9762\u901a\u8fc7Statement\u6267\u884c\u67e5\u8be2\u83b7\u5f97\u7684\u7ed3\u679c\u96c6<\/p>\n\n\n\n
        \"\"<\/div><\/figure>\n\n\n\n
        \n
        \u5728\u67e5\u8be2\u7684\u7ed3\u679c\u96c6\u4e2d\uff0c\u6709\u4e00\u4e2a\u6e38\u6807\uff0c\u6e38\u6807\u53ef\u4ee5\u79fb\u52a8\uff0c\u79fb\u52a8\u7684\u65f6\u5019\u4f1a\u626b\u63cf\u4e00\u4e9b\u884c\uff0c\u90a3\u4e48\u5bf9\u4e8e\u8fd9\u4e9b\u626b\u63cf\u5230\u7684\u884c\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u83b7\u53d6\u5bf9\u5e94\u7684\u5217\u7684\u503c\u3002<\/p>\n<\/blockquote>\n\n\n\n
        \/\/ \u79fb\u52a8\u6e38\u6807\u65b9\u6cd5\n\n\/\/ \u5411\u4e0b\u79fb\u52a8\nBoolean ret = resultSet.next();\n\n\/\/ \u5411\u4e0a\u79fb\u52a8\nBoolean ret = resultSet.previous();\n\n\/\/ \u5b9a\u4f4d\u5230\u7b2c\u4e00\u884c\u4e4b\u524d\nresultSet.beforeFirst();\n\n\/\/ \u5b9a\u4e49\u5230\u6700\u540e\u4e00\u884c\u4e4b\u540e\nresultSet.afterLast();\n\n\n\/\/ \u83b7\u53d6\u503c\u7684\u65b9\u6cd5\nresultSet.getInt(String columnName);\nresultSet.getString(String columnName);\nresultSet.getDate(String columnName);<\/code><\/pre>\n\n\n\n
        \"\"<\/div><\/figure>\n\n\n\n
        Decimal getDecimal BigDecimal<\/strong><\/p>\n\n\n\n
        \u4f7f\u7528JDBC\u8fdb\u884c\u589e\u5220\u6539\u67e5<\/h3>\n\n\n\n
        statement\u7684\u4ec0\u4e48\u65b9\u6cd5\uff1f<\/p>\n\n\n\n
        \u6211\u4eec\u6bcf\u6b21\u8981\u64cd\u4f5c\uff0c\u5c31\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2aStatement\uff0c\u8fd9\u4e2aStatement\u627f\u8f7d\u4e86\u5bf9\u5e94\u7684SQL\uff0c\u901a\u8fc7executeXXX\u65b9\u6cd5\u6765\u8fdb\u884c\u6267\u884c\u3002<\/p>\n\n\n\n
        \n
        \u67e5\u8be2\uff1aexecuteQuery<\/p>\n<\/blockquote>\n\n\n\n
        \n
        \u589e\u5220\u6539\uff1aexecuteUpdate<\/p>\n<\/blockquote>\n\n\n\n
        \u589e<\/strong><\/p>\n\n\n\n
        \/\/ 3. \u53d1\u9001SQL\u8bed\u53e5\n\/\/ \u8fd4\u56de\u503c\u662f\u4e2aint\uff0c\u4ee3\u8868\u5f71\u54cd\u7684\u884c\u6570\u3002 \u65b0\u589e\u7684\u884c\u6570\nint affectedRows = statement.executeUpdate(\"INSERT INTO `market_user` VALUES (23, 'stone1024', '$2a$10$n0Gs00i0WiUCNYqAaEDcNefOZw2H02QnRXeiavB.nIVDvRnHL3Ipi', 0, NULL, '2023-06-19 09:36:11', '111.175.54.67', 0, '123456', '13971721834', 'https:\/\/yanxuan.nosdn.127.net\/80841d741d7fa3073e0ae27bf487339f.jpg?imageView&quality=90&thumbnail=64x64', '', '', 0, '2023-06-18 18:22:42', '2023-06-19 09:38:45', 0);\");<\/code><\/pre>\n\n\n\n
        \u5220<\/strong><\/p>\n\n\n\n
        \n
        \u589e\u3001\u5220\u3001\u6539\u90fd\u662f\u4e00\u6837\u7684\uff0c\u90fd\u662f\u4f7f\u7528 statement.executeUpdate(String sql)<\/code> \u6765\u6267\u884cSQL\u8bed\u53e5\uff0c\u8fd4\u56de\u7684\u7ed3\u679c\u4e5f\u662f\u4e00\u6837\u7684\uff0c\u90fd\u662f\u5f71\u54cd\u7684\u884c\u6570\u3002<\/p>\n<\/blockquote>\n\n\n\n
        \/\/ 3. \u53d1\u9001SQL\u8bed\u53e5\n\/\/ \u8fd4\u56de\u503c\u662f\u4e2aint\uff0c\u4ee3\u8868\u5f71\u54cd\u7684\u884c\u6570\u3002 \u5220\u9664\u7684\u884c\u6570\nint affectedRows = statement.executeUpdate(\"delete from market_user where id = 23\");<\/code><\/pre>\n\n\n\n
        \u6539<\/strong><\/p>\n\n\n\n
        int affectedRows = statement.executeUpdate(\"update stu set name = '\u5b54\u4e8c\u6123\u5b50',class='\u4e94\u73ed' where id = 4\"<\/code><\/pre>\n\n\n\n
        \u67e5<\/strong><\/p>\n\n\n\n
        \/\/ 3. \u53d1\u9001SQL\u8bed\u53e5\n\/\/ resultSet\u6307\u7ed3\u679c\u96c6\u5bf9\u8c61\uff0c\u5177\u4f53\u6307\u4ee3\u67e5\u8be2\u8fd4\u56de\u7684\u4e34\u65f6\u8868\u5bf9\u8c61\nResultSet resultSet = statement.executeQuery(\"select * from stu\");\n\n\n\/\/  \u89e3\u6790\u7ed3\u679c\u96c6\nwhile (resultSet.next()) {\n\n\tint id = resultSet.getInt(\"id\");\n\tString name = resultSet.getString(\"name\");\n \tint age = resultSet.getInt(\"age\");\n\tString className = resultSet.getString(\"class\");\n\n\tSystem.out.println(\"id:\" + id);\n\tSystem.out.println(\"name:\" + name);\n\tSystem.out.println(\"age:\" + age);\n\tSystem.out.println(\"className:\" + className);\n\n}<\/code><\/pre>\n\n\n\n
        JDBC\u7684\u4f18\u5316<\/h3>\n\n\n\n
          \n
        • \u63d0\u53d6\u5de5\u5177\u7c7b<\/li>\n\n\n\n
        • \u8fde\u63a5\u914d\u7f6e\u653e\u5165\u5230\u914d\u7f6e\u6587\u4ef6\u4e2d<\/li>\n\n\n\n
        • \u6ce8\u518c\u9a71\u52a8\u5229\u7528\u53cd\u5c04\uff0c\u89e3\u8026<\/li>\n\n\n\n
        • \u5173\u95ed\u8d44\u6e90\uff08\u63d0\u53d6\u516c\u5171\u65b9\u6cd5\uff09<\/li>\n<\/ul>\n\n\n\n
          public class JDBCUtils {\n\n  static String url;\n  static String username;\n  static String password;\n  static String driver;\n\n  static {\n\n    Properties properties = new Properties();\n    try {\n      properties.load(new FileInputStream(\"jdbc.properties\"));\n    } catch (IOException e) {\n      e.printStackTrace();\n    }\n\n\n    url = properties.getProperty(\"url\");\n    username = properties.getProperty(\"username\");\n    password = properties.getProperty(\"password\");\n    driver = properties.getProperty(\"driverClassName\");\n  }\n\n\n  \/\/ \u83b7\u53d6\u8fde\u63a5\n  public static Connection getConnection(){\n\n    Connection connection = null;\n    try {\n      Class.forName(driver);\n      connection = DriverManager.getConnection(url, username, password);\n    }catch (Exception ex) {\n      ex.printStackTrace();\n    }\n\n    return connection;\n  }\n\n\n\n  \/\/ \u5173\u95ed\u8d44\u6e90\n  public static void  close(Connection connection, Statement statement, ResultSet resultSet){\n\n    try {\n\n      if (resultSet != null) resultSet.close();\n      if (statement!= null) statement.close();\n      if (connection != null) connection.close();\n\n    }catch (Exception ex) {\n      ex.printStackTrace();\n    }\n\n\n  }\n}<\/code><\/pre>\n\n\n\n
          \u6570\u636e\u5e93\u6ce8\u5165\u95ee\u9898\uff08\u5173\u6ce8\uff09<\/h2>\n\n\n\n
          \n
          \u6570\u636e\u5e93\u6ce8\u5165\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u7f51\u7edc\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u5229\u7528\u8fd9\u79cd\u6f0f\u6d1e\u5411\u7f51\u7ad9\u6216\u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u5e93\u4e2d\u63d2\u5165\u6076\u610f\u4ee3\u7801\uff0c\u4ece\u800c\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u3001\u6267\u884c\u975e\u6cd5\u64cd\u4f5c\u7b49\u3002\u4f8b\u5982\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u5047\u8bbe\u6709\u4e00\u4e2a\u767b\u5f55\u9875\u9762\uff0c\u7528\u6237\u9700\u8981\u8f93\u5165\u7528\u6237\u540d\u548c\u5bc6\u7801\u624d\u80fd\u767b\u5f55\u3002\u8be5\u9875\u9762\u7684\u540e\u7aef\u4ee3\u7801\u4f7f\u7528SQL\u67e5\u8be2\u8bed\u53e5\u6765\u9a8c\u8bc1\u7528\u6237\u7684\u8eab\u4efd\uff0c\u4f8b\u5982\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
          `<\/code><\/p>\n<\/blockquote>\n\n\n\n
          \n
          SELECT * FROM user WHERE username = ‘input_username’ AND password = ‘input_password’;<\/p>\n<\/blockquote>\n\n\n\n
          \n
          `<\/code><\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u5176\u4e2d\uff0c’input_username’\u548c’input_password’\u662f\u7528\u6237\u5728\u767b\u5f55\u9875\u9762\u4e0a\u8f93\u5165\u7684\u503c\u3002\u5982\u679c\u7528\u6237\u8f93\u5165\u7684\u503c\u4e0e\u6570\u636e\u5e93\u4e2d\u7684\u503c\u5339\u914d\uff0c\u5219\u5141\u8bb8\u7528\u6237\u767b\u5f55\uff0c\u5426\u5219\u62d2\u7edd\u767b\u5f55\u3002<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u7136\u800c\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5728\u8f93\u5165\u6846\u4e2d\u8f93\u5165\u4e00\u4e9b\u6076\u610f\u4ee3\u7801\uff0c\u4f8b\u5982\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
          `<\/code><\/p>\n<\/blockquote>\n\n\n\n
          \n
          input_username: root<\/p>\n<\/blockquote>\n\n\n\n
          \n
          input_password: xxx’ or ‘ 1=1<\/p>\n<\/blockquote>\n\n\n\n
          \n
          `<\/code><\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u8fd9\u4e2a\u8f93\u5165\u4f1a\u66f4\u6539SQL\u67e5\u8be2\u8bed\u53e5\uff0c\u53d8\u6210\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
          `<\/code>SQL<\/p>\n<\/blockquote>\n\n\n\n
          \n
          — \u4e0b\u9762\u8fd9\u6761SQL\u7684\u542b\u4e49\uff0c\u662f\u8fd9\u6837\u7684 1=1\u662f\u6052\u7b49\u7684\uff0c\u6240\u4ee5where\u6761\u4ef6\u76f8\u5f53\u4e8e\u4f1a\u6ca1\u6709\u4efb\u4f55\u6761\u4ef6<\/p>\n<\/blockquote>\n\n\n\n
          \n
          — SELECT * FROM users WHERE (username = ‘admin’ AND password = ‘xxx’) or ‘1=1’;<\/p>\n<\/blockquote>\n\n\n\n
          \n
          SELECT * FROM users WHERE username = ‘admin’ AND password = ‘xxx’ or ‘ 1=1’;<\/p>\n<\/blockquote>\n\n\n\n
          \n
          SELECT * FROM users WHERE username = ‘admin’ AND password = ‘xxx’ ;drop database test1′;<\/p>\n<\/blockquote>\n\n\n\n
          \n
          `<\/code><\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u8fd9\u4e2aSQL\u8bed\u53e5\u7684\u542b\u4e49\u662f\u201c\u4eceusers\u8868\u4e2d\u9009\u62e9\u4efb\u4f55\u4e00\u4e2a\u884c\uff0c\u5176\u4e2d\u7528\u6237\u540d\u4e3a\u7a7a\u62161\u7b49\u4e8e1\uff0c\u5e76\u4e14\u5bc6\u7801\u4e3a\u7a7a\u201d\u3002\u7531\u4e8e1\u7b49\u4e8e1\u59cb\u7ec8\u4e3a\u771f\uff0c\u56e0\u6b64\u8fd9\u4e2aSQL\u8bed\u53e5\u5c06\u8fd4\u56deusers\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u4ece\u800c\u7ed5\u8fc7\u4e86\u8eab\u4efd\u9a8c\u8bc1\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u4ee5\u4efb\u4f55\u7528\u6237\u7684\u8eab\u4efd\u767b\u5f55\u7cfb\u7edf\u3002\u8fd9\u5c31\u662f\u4e00\u4e2a\u5178\u578b\u7684SQL\u6ce8\u5165\u653b\u51fb\u3002<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u6570\u636e\u5e93\u6ce8\u5165\u95ee\u9898\u4ea7\u751f\u7684\u539f\u56e0\uff1a\u56e0\u4e3aSQL\u8bed\u53e5\u662f\u901a\u8fc7\u5b57\u7b26\u4e32\u62fc\u63a5\u7684\uff0c\u8fd9\u4e2a\u65f6\u5019\u7528\u6237\u53ef\u80fd\u8f93\u5165\u4e00\u4e9b\u5b57\u7b26\uff0c\u8fd9\u4e9b\u5b57\u7b26\u4e2d\u5305\u542b\u6709SQL\u8bed\u53e5\u4e2d\u7684\u5173\u952e\u5b57\uff0c\u90a3\u4e48\u901a\u8fc7\u5b57\u7b26\u4e32\u62fc\u63a5SQL\u8bed\u53e5\u4e4b\u540e\uff0c\u53ef\u80fd\u4f1a\u6539\u53d8SQL\u8bed\u53e5\u7684\u683c\u5f0f\uff0c\u8fdb\u800c\u5f15\u53d1\u5b89\u5168\u6027\u7684\u95ee\u9898\u3002<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u6839\u672c\u7684\u539f\u56e0\uff1aMySQL\u628a\u7528\u6237\u8f93\u5165\u7684\u53c2\u6570\u5f53\u505a\u5173\u952e\u5b57\u6765\u89e3\u6790\u4e86<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u5982\u4f55\u89e3\u51b3\u6570\u636e\u5e93\u6ce8\u5165\u95ee\u9898\u5462\uff1f<\/p>\n<\/blockquote>\n\n\n\n
          \n
          – \u901a\u8fc7\u4e00\u5b9a\u7684\u89c4\u5219\u8fc7\u6ee4\u8f93\u5165\u7684\u503c<\/p>\n<\/blockquote>\n\n\n\n
          \n
          – PrepareStatement\uff08\u9884\u7f16\u8bd1\u7684Statement\uff09<\/p>\n<\/blockquote>\n\n\n\n
          \/\/ \u767b\u5f55\u65b9\u6cd52\npublic static Boolean login2(String username,String password) throws SQLException {\n\n  \/\/ 1. \u83b7\u53d6\u8fde\u63a5\n  Connection connection = JDBCUtils.getConnection();\n\n  \/\/ 2. \u83b7\u53d6PreparedStatement\n  \/\/ \u8fd9\u4e00\u6b65\uff0c\u5728\u521b\u5efaPreparedStatement\u7684\u65f6\u5019\uff0cPreparedStatement\u4f1a\u628a\u5f53\u524d\u8fd9\u4e2a\u6ca1\u6709\u53c2\u6570\u7684SQL\u8bed\u53e5\uff0c\u53d1\u9001\u7ed9MySQL\u670d\u52a1\u5668\uff0c\u6267\u884c\u9884\u7f16\u8bd1\n  \/\/ \u9884\u7f16\u8bd1\uff1a\u5176\u5b9e\u5c31\u662f\u53bb\u89e3\u6790\u8fd9\u4e2aSQL\u8bed\u53e5\u4e2d\u7684\u5173\u952e\u5b57\uff0c\u53d8\u6210MySQL\u53ef\u4ee5\u6267\u884c\u7684\u547d\u4ee4\n  \/\/ \u5728\u9884\u7f16\u8bd1\u4e4b\u540e\uff0c\u540e\u7eed\u8f93\u5165\u7684\u5b57\u7b26\u4e32\uff0c\u5c31\u53ea\u4f1a\u88abMySQL\u5f53\u6210\u7eaf\u6587\u672c\u6765\u89e3\u6790\n  PreparedStatement preparedStatement = connection.prepareStatement(\"select * from user where name = ? and password = ?\");\n\n\n  \/\/ 3. \u8bbe\u7f6e\u53c2\u6570\n  \/\/ \u5e8f\u53f7\u4ece 1 \u5f00\u59cb\n  preparedStatement.setString(1,username);\n  preparedStatement.setString(2,password);\n\n\n  \/\/ 4. \u4f20\u9012\u53c2\u6570\uff0c\u6267\u884cSQL\u8bed\u53e5\n  ResultSet resultSet = preparedStatement.executeQuery();\n\n  if (resultSet.next()) {\n    return true;\n  }else {\n    return false;\n  }\n}<\/code><\/pre>\n\n\n\n
          \n
          \u603b\u7ed3\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
          1. \u5728\u5b89\u5168\u6027\u65b9\u6cd5\uff0cPreparedStatement\u6bd4Statement\u8981\u597d\u5f88\u591a\uff0c\u6ca1\u6709\u6570\u636e\u5e93\u7684\u6ce8\u5165\u95ee\u9898<\/p>\n<\/blockquote>\n\n\n\n
          \n
          2. \u5728\u6548\u7387\u65b9\u9762\uff0c\u6267\u884c\u5355\u6b21SQL\u8bed\u53e5\u7684\u65f6\u5019\uff0cStatement\u7684\u6548\u7387\u6bd4PreparedStatement\u8981\u597d\u4e00\u4e9b<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u56e0\u4e3aStatement\u5728\u6267\u884c\u4e00\u6761SQL\u8bed\u53e5\u7684\u65f6\u5019\uff0c\u53ea\u4f1a\u4e0e\u6570\u636e\u5e93\u901a\u4fe1\u4e00\u6b21\uff0c\u800cPreparedStatement\u8981\u901a\u4fe1\u4e24\u6b21<\/p>\n<\/blockquote>\n\n\n\n
          \n
          preparedStatement\u4f7f\u7528\u7684\u6bd4statement\u591a\u5f88\u591a\u3002statement\u51e0\u4e4e\u4e0d\u7528\u3002<\/p>\n<\/blockquote>\n\n\n\n
          \"\"<\/div><\/figure>\n\n\n\n
          \"\"<\/div><\/figure>\n\n\n\n
          \n
          Statement\u548cPreparedStatement\u4e4b\u95f4\u7684\u533a\u522b\uff1a<\/p>\n<\/blockquote>\n\n\n\n
          \n
          1. Statement\u505a\u7684\u662f\u5b57\u7b26\u4e32\u7684\u62fc\u63a5\uff0c\u6709SQL\u6ce8\u5165\u7684\u98ce\u9669<\/p>\n<\/blockquote>\n\n\n\n
          \n
          2. PreparedStatement\u505a\u7684\u662f\u9884\u7f16\u8bd1\uff0c\u6ca1\u6709SQL\u6ce8\u5165\u7684\u98ce\u9669<\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u540e\u9762\u7684SQL\u6ce8\u5165\uff0c\u5e95\u5c42\u90fd\u662f\u901a\u8fc7PreparedStatement\u6765\u89e3\u51b3\u7684SQL\u6ce8\u5165\u95ee\u9898<\/strong><\/p>\n<\/blockquote>\n\n\n\n
          \n
          \u8fd9\u91cc\u5728\u540e\u9762\u5b66\u4e60MyBatis\u65f6\u4f1a\u6d89\u53ca\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u9762\u8bd5\u9898\uff1a${} \u548c #{}\u4e4b\u95f4\u7684\u533a\u522b<\/strong><\/p>\n<\/blockquote>\n\n\n\n
          \u6279\u5904\u7406\u95ee\u9898\uff08\u4e86\u89e3\uff09<\/h2>\n\n\n\n
          \u6bd4\u5982\uff0c\u4f60\u60f3\u5f80\u6570\u636e\u5e93\u91cc\u9762\u63d2\u5165\u5927\u91cf\u6570\u636e\u3002 100w<\/p>\n\n\n\n
          \u5176\u5b9e\u5c31\u662f\u6279\u91cf\u7684\u5904\u7406SQL\u8bed\u53e5\uff0c\u5178\u578b\u7684\u4e1a\u52a1\u573a\u666f\u5c31\u662f\u4e00\u6b21\u63d2\u5165\u5927\u91cf\u7684\u6570\u636e\u3002\u5728\u4eca\u540e\uff0c\u5982\u679c\u9700\u8981\u5927\u5bb6\u4f7f\u7528JDBC\u6279\u91cf\u63d2\u5165\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n\n\n\n
          for\u5faa\u73af\u9010\u6761\u63d2\u5165<\/h3>\n\n\n\n
          \/\/ for\u5faa\u73af\u6765\u505a\npublic static void batchUseForEach() throws SQLException {\n\n    Statement statement = connection.createStatement();\n\n    for (int i = 0; i < 10000; i++) {\n\n        String sql = \"insert into user values (\"+i+\",'foreach',null,null)\";\n\n        statement.executeUpdate(sql);\n\n    }\n}<\/code><\/pre>\n\n\n\n
          \n
          \u5411MySQL\u670d\u52a1\u5668\u53d1\u9001\u4e86SQL\u8bed\u53e5 1w\u6b21\uff0cSQL\u8bed\u53e5\u88ab\u7f16\u8bd1\u4e861w\u6b21\uff0cSQL\u8bed\u53e5\u4e5f\u88ab\u6267\u884c\u4e861w\u6b21<\/p>\n<\/blockquote>\n\n\n\n
          statement\u6279\u5904\u7406<\/h3>\n\n\n\n
          \/\/ Statement \u6765\u5904\u7406\npublic static void batchUseStatement() throws SQLException {\n\n    Statement statement = connection.createStatement();\n\n    for (int i = 10000; i < 20000; i++) {\n        String sql = \"insert into user values (\"+i+\",'batchUseStatement',null,null)\";\n        \/\/ \u76f8\u5f53\u4e8e\u5728\u5185\u90e8\u6709\u4e00\u4e2a\u5bb9\u5668\u3002 \n        statement.addBatch(sql);\n    }\n\n    \/\/ \u53d1\u9001SQL\u8bed\u53e5\uff0c\u6267\u884c\n    statement.executeBatch();\n\n}<\/code><\/pre>\n\n\n\n
          \n
          \u5411MySQL\u670d\u52a1\u5668\u53d1\u9001\u4e86SQL\u8bed\u53e5 1\u6b21\uff0c\u8fd9\u4e00\u6b21\u4e2d\u5305\u542b1w\u6761SQL\u8bed\u53e5\u4fe1\u606f\uff0cSQL\u8bed\u53e5\u88ab\u7f16\u8bd1\u4e861w\u6b21\uff0cSQL\u8bed\u53e5\u4e5f\u88ab\u6267\u884c\u4e861w\u6b21<\/p>\n<\/blockquote>\n\n\n\n
          PreparedStatement\u6279\u5904\u7406<\/h3>\n\n\n\n
          \n
          \u9700\u8981\u5728\u6570\u636e\u5e93\u7684url\u540e\u9762\u52a0\u4e0a\u914d\u7f6e\uff1arewriteBatchedStatements=true \uff0c\u8868\u793a\u5f00\u542f\u6279\u5904\u7406<\/p>\n<\/blockquote>\n\n\n\n
          \/\/ PreparedStatement\u6765\u5904\u7406\npublic static void batchUsePrepapreStatement() throws SQLException {\n\n    \/\/ \u83b7\u53d6PreparedStatement\n    PreparedStatement preparedStatement = connection.prepareStatement(\"insert into user values (?,?,null,null)\");\n\n\n    \/\/ \u5faa\u73af\uff0c\u8bbe\u7f6e\u53c2\u6570\n    for (int i = 20000; i < 30000; i++) {\n\n        preparedStatement.setInt(1,i);\n        preparedStatement.setString(2,\"PrepapreStatement\");\n\n        preparedStatement.addBatch();\n\n    }\n\n    \/\/ \u628a\u53c2\u6570\u53d1\u9001\u7ed9MySQL\u670d\u52a1\u5668\uff0c\u6267\u884cSQL\u8bed\u53e5\n    preparedStatement.executeBatch();\n\n    \/\/ insert into user values (),(),(),(),();\n\n}<\/code><\/pre>\n\n\n\n
          \n
          \u4e0eMySQL\u901a\u4fe1\u4e862\u6b21\uff0cSQL\u8bed\u53e5\u88ab\u7f16\u8bd1\u4e86\u4e00\u6b21\uff0cSQL\u8bed\u53e5\u88ab\u6267\u884c\u4e86\u4e00\u6b21<\/p>\n<\/blockquote>\n\n\n\n
          \u63d2\u5165n\u6761\u6570\u636e<\/p>\n\n\n\n
          for\u5faa\u73af\uff0c\u901a\u8bafn\u6b21\uff0c\u7f16\u8bd1n\u6b21\uff0c\u6267\u884cn\u6b21<\/p>\n\n\n\n
          statement\uff0c\u901a\u8baf1\u6b21\uff0c\u7f16\u8bd1n\u6b21\uff0c\u6267\u884cn\u6b21<\/p>\n\n\n\n
          prepareStatement\uff0c\u901a\u8baf2\u6b21\uff0c\u7f16\u8bd11\u6b21\uff0c\u6267\u884c1\u6b21<\/p>\n\n\n\n
          \u5047\u5982\u9700\u8981\u6279\u5904\u7406n\u6761SQL\u8bed\u53e5\uff0c\u5f00\u542f\u4e86rewriteBatchedStatements\u4e4b\u540e<\/p>\n\n\n\n
          <\/th>\u901a\u4fe1\u6b21\u6570<\/th>\u7f16\u8bd1\u6b21\u6570<\/th>\u6267\u884c\u6b21\u6570<\/th>\u65f6\u95f4<\/th><\/tr><\/thead>
          for\u5faa\u73af<\/td>n<\/td>n<\/td>n<\/td>\u6700\u957f<\/td><\/tr>
          Statement<\/td>1<\/td>n<\/td>n<\/td>\u6b21\u4e4b<\/td><\/tr>
          PreparedStatement<\/td>2<\/td>1<\/td>1<\/td>\u6700\u77ed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
          \u4e8b\u52a1 Transaction Tx<\/h2>\n\n\n\n
          \u4ecb\u7ecd<\/h3>\n\n\n\n
          \n
          \u6570\u636e\u5e93\u4e8b\u52a1( transaction)\u662f\u8bbf\u95ee\u5e76\u53ef\u80fd\u64cd\u4f5c\u5404\u79cd\u6570\u636e\u9879\u7684\u4e00\u4e2a\u6570\u636e\u5e93\u64cd\u4f5c\u5e8f\u5217\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u8981\u4e48\u5168\u90e8\u6267\u884c,\u8981\u4e48\u5168\u90e8\u4e0d\u6267\u884c\uff0c\u662f\u4e00\u4e2a\u4e0d\u53ef\u5206\u5272\u7684\u5de5\u4f5c\u5355\u4f4d\u3002\u4e8b\u52a1\u7531\u4e8b\u52a1\u5f00\u59cb\u4e0e\u4e8b\u52a1\u7ed3\u675f\u4e4b\u95f4\u6267\u884c\u7684\u5168\u90e8\u6570\u636e\u5e93\u64cd\u4f5c\u7ec4\u6210\u3002<\/p>\n<\/blockquote>\n\n\n\n
          \u4e8b\u52a1\u5c31\u662f\u8981\u4fdd\u8bc1\u4e00\u7ec4\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u8981\u4e48\u5168\u90e8\u6210\u529f\uff0c\u8981\u4e48\u5168\u90e8\u5931\u8d25\u3002<\/strong><\/p>\n\n\n\n
          \u6bd4\u5982\u8f6c\u8d26\u64cd\u4f5c\uff0c\u6d89\u53ca\u5230\u51e0\u4e2a\u65b9\u9762\u3002<\/p>\n\n\n\n
          \u8d26\u6237\u4f59\u989d\u8868\u3002 zs 1000 | ls 5000<\/p>\n\n\n\n
          \u73b0\u5728zs\u8981\u7ed9ls\u8f6c\u8d26\uff0c\u8f6c500\u3002\u73b0\u5728\u5728\u6570\u636e\u5e93\u91cc\u9762\uff0c\u6211\u4eec\u8981\u8fdb\u884c\u4e24\u6b65\u64cd\u4f5c\u3002<\/p>\n\n\n\n
            \n
          1. \u6263zs\u7684\u94b1\uff0c\u6263500<\/li>\n\n\n\n
          2. \u7ed9ls\u589e\u52a0\u94b1\uff0c\u589e\u52a0500<\/li>\n<\/ol>\n\n\n\n
            A\u7ed9B\u8f6c\u8d26\u3002\u6d89\u53ca\u5230\u4e24\u4e2a\u64cd\u4f5c\uff0c\u9700\u8981\u7ed9A\u8d26\u6237\u6263\u94b1\uff0c\u7136\u540e\u7ed9B\u8d26\u6237\u589e\u52a0\u94b1\u3002<\/p>\n\n\n\n
            \u5982\u679c\u5728\u8fd9\u4e2a\u64cd\u4f5c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u51fa\u73b0\u4e86\u5f02\u5e38\u3002\u53ef\u80fd\u4f1a\u5bfc\u81f4A\u8d26\u6237\u7684\u94b1\u6263\u4e86\uff0cB\u8d26\u6237\u7684\u94b1\u6ca1\u6709\u589e\u52a0\u3002<\/p>\n\n\n\n
            \u4f7f\u7528\u4e8b\u52a1<\/h3>\n\n\n\n
            <\/th>\u6570\u636e\u5e93SQL<\/th>JDBC\u4ee3\u7801<\/th><\/tr><\/thead>
            \u5f00\u542f\u4e8b\u52a1<\/td>start transaction;<\/td>connection.setAutoCommit(false)<\/td><\/tr>
            \u63d0\u4ea4\u4e8b\u52a1<\/td>commit;<\/td>connection.commit();<\/td><\/tr>
            \u56de\u6eda\u4e8b\u52a1<\/td>rollback;<\/td>connection.rollback();<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
            \n
            \u6bd4\u5982\u6211\u4eec\u8981\u505a\u8f6c\u8d26\u6848\u4f8b \u2192 \u5199\u4e00\u6bb5\u4f2a\u4ee3\u7801<\/p>\n<\/blockquote>\n\n\n\n
            \n
            `<\/code>java<\/p>\n<\/blockquote>\n\n\n\n
            \n
            \u5f00\u542f\u4e8b\u52a1<\/p>\n<\/blockquote>\n\n\n\n
            \n
            try{<\/p>\n<\/blockquote>\n\n\n\n
            \n
            \u6267\u884c\u8f6c\u51fa<\/p>\n<\/blockquote>\n\n\n\n
            \n
            \u6267\u884c\u63a5\u6536<\/p>\n<\/blockquote>\n\n\n\n
            \n
            \u63d0\u4ea4\u4e8b\u52a1<\/p>\n<\/blockquote>\n\n\n\n
            \n
            }catch(Exception e){<\/p>\n<\/blockquote>\n\n\n\n
            \n
            \u56de\u6eda\u4e8b\u52a1<\/p>\n<\/blockquote>\n\n\n\n
            \n
            }<\/p>\n<\/blockquote>\n\n\n\n
            \n
            `<\/code><\/p>\n<\/blockquote>\n\n\n\n
              \n
            • API<\/li>\n<\/ul>\n\n\n\n
                \/\/  \u5f00\u542f\u4e8b\u52a1\n  connection.setAutoCommit(false);\n  \n  \/\/ \u63d0\u4ea4\u4e8b\u52a1\n  connection.commit();\n  \n  \/\/ \u56de\u6eda\u4e8b\u52a1\n  connection.rollback();<\/code><\/pre>\n\n\n\n
                \n
              • \u547d\u4ee4<\/li>\n<\/ul>\n\n\n\n
                  # \u5f00\u59cb\u4e8b\u52a1\n  start transaction;\n  \n  # \u63d0\u4ea4\u4e8b\u52a1\n  commit;\n  \n  # \u56de\u6eda\u4e8b\u52a1\n  rollback;<\/code><\/pre>\n\n\n\n
                create table account_t(\n    id int primary key auto_increment,\n    name varchar(50),\n    money int ,\n    create_time timestamp  default current_timestamp ,\n    update_time timestamp  default current_timestamp on update current_timestamp\n);\n\n-- \u63d2\u5165\u4e00\u6761\u6570\u636e\uff1a \u6731\u4e03   50000\ninsert into account_t(name, money) values ('\u5f20\u4e09',   50000);\ninsert into account_t(name, money) values ('\u674e\u56db',   20000);\ninsert into account_t(name, money) values ('\u738b\u4e94',   10000);\ninsert into account_t(name, money) values ('\u8d75\u516d',   10000);\n\n-- name\u662f\u552f\u4e00\u7684\u3002   <\/code><\/pre>\n\n\n\n
                private static boolean transfer(String fromName, String toName, int money) throws SQLException, ClassNotFoundException {\n\n  \/\/ 1.\u83b7\u53d6\u8fde\u63a5\n  Connection connection = JdbcUtils.getConnection();\n\n  \/\/ 2.\u5f00\u542f\u4e8b\u52a1\n  connection.setAutoCommit(false);\n\n  try {\n    \/\/ 3.1 \u6263A\u7684\u94b1\n    \/\/ update account set money = money - ? where name = ? and money > ?\n    PreparedStatement preparedStatementA = connection.prepareStatement(\"update account set money = money - ? where name = ? and \" + \"money > ?\");\n    preparedStatementA.setInt(1, money);\n    preparedStatementA.setString(2, fromName);\n    preparedStatementA.setInt(3, money);\n\n    int affectedRowsA = preparedStatementA.executeUpdate();\n    System.out.println(affectedRowsA);\n\n    if (affectedRowsA != 1) {\n      throw new RuntimeException(\"A\u8d26\u6237\u4fe1\u606f\u4e0d\u5bf9\" + affectedRowsA);\n    }\n\n    \/\/int i = 1 \/ 0;\n\n\n    \/\/ 3.2 \u589e\u52a0B\u8d26\u6237\u7684\u94b1\n    \/\/ update account set money = money + ? where name = ?\n    PreparedStatement preparedStatementB = connection.prepareStatement(\"update account set money = money + ? where name = ? \");\n    preparedStatementB.setInt(1, money);\n    preparedStatementB.setString(2, toName);\n\n    int affectedRowsB = preparedStatementB.executeUpdate();\n    System.out.println(affectedRowsB);\n\n    if (affectedRowsB != 1) {\n      throw new RuntimeException(\"B\u8d26\u6237\u4fe1\u606f\u4e0d\u5bf9\" + affectedRowsB);\n    }\n\n    connection.commit();\n\n  } catch (Exception e) {\n    e.printStackTrace();\n    connection.rollback();\n    return false;\n  }\n\n\n  return true;\n}\n<\/code><\/pre>\n\n\n\n
                \u7279\u6027<\/h3>\n\n\n\n
                \u4e8b\u52a1\u901a\u5e38\u5177\u6709\u56db\u4e2a\u6807\u51c6\u7279\u6027\uff08ACID\uff09\uff1a<\/p>\n\n\n\n
                  \n
                • \u539f\u5b50\u6027\uff08Atomicity\uff09<\/li>\n<\/ul>\n\n\n\n
                  \u4e8b\u52a1\u662f\u4e00\u4e2a\u4e0d\u53ef\u5206\u5272\u7684\u64cd\u4f5c\u5355\u5143\uff08\u6570\u636e\u5e93\u7684\u64cd\u4f5c\uff09\uff0c\u4e8b\u52a1\u4e2d\u7684\u64cd\u4f5c\u8981\u4e48\u5c31\u90fd\u6210\u529f\uff0c\u8981\u4e48\u5c31\u90fd\u4e0d\u6210\u529f\u3002<\/p>\n\n\n\n
                    \n
                  • \u4e00\u81f4\u6027\uff08Consistency\uff09<\/li>\n<\/ul>\n\n\n\n
                    \u4e8b\u52a1\u5fc5\u987b\u4f7f\u6570\u636e\u5e93\u4ece\u4e00\u4e2a\u4e00\u81f4\u6027\u72b6\u6001\u5230\u53e6\u5916\u4e00\u4e2a\u4e00\u81f4\u6027\u72b6\u6001\u3002<\/p>\n\n\n\n
                    \u5728\u8f6c\u8d26\u6848\u4f8b\u4e2d\uff0c\u4e00\u81f4\u6027\u662f\u6307 \u5728\u8f6c\u8d26\u524d\u548c\u8f6c\u8d26\u540e\uff0c\uff08\u65e0\u8bba\u600e\u4e48\u8f6c\u8d26\uff09\uff0c\u94b1\u7684\u603b\u91d1\u989d\u662f\u524d\u540e\u4e00\u81f4\u7684\uff0c\u4e0d\u53d8\u7684<\/p>\n\n\n\n
                      \n
                    • \u9694\u79bb\u6027\uff08Isolation\uff09<\/strong><\/li>\n<\/ul>\n\n\n\n
                      \u4e8b\u52a1\u4e0e\u4e8b\u52a1\u4e4b\u95f4\u662f\u4e92\u76f8\u9694\u79bb\u7684\uff0c\u4e92\u4e0d\u5f71\u54cd\u7684\u3002<\/p>\n\n\n\n
                      \n
                      \u6570\u636e\u5e93\u6709\u4e3a\u9694\u79bb\u6027\u8bbe\u7f6e\u4e0d\u540c\u7684\u9694\u79bb\u7ea7\u522b\u3002\u4e0d\u540c\u7684\u9694\u79bb\u7ea7\u522b\u5bf9\u4e8e\u9694\u79bb\u6027\u7684\u5f71\u54cd\u662f\u4e0d\u4e00\u6837\u7684<\/p>\n<\/blockquote>\n\n\n\n
                        \n
                      • \u6301\u4e45\u6027\uff08Durability\uff09<\/li>\n<\/ul>\n\n\n\n
                        \u4e00\u4e2a\u4e8b\u52a1\u4e00\u65e6\u751f\u6548\uff0c\u90a3\u4e48\u5bf9\u6570\u636e\u5e93\u7684\u6539\u53d8\u662f\u6c38\u4e45\u7684\uff0c\u4e0d\u53ef\u9006\u8f6c\u7684\u3002\u610f\u601d\u5c31\u662f\u63d0\u4ea4\u4e86\u4e8b\u52a1\u4e4b\u540e\uff0c\u5c31\u5df2\u7ecf\u5bf9\u6570\u636e\u5e93\u4ea7\u751f\u7684\u53d8\u5316\uff0c\u90a3\u4e48\u540e\u7eed\u518d\u56de\u6eda\u5c31\u56de\u6eda\u4e0d\u4e86\u4e86<\/p>\n\n\n\n
                        \u4e00\u822c\u95ee\u4e8b\u52a1\u7684\u56db\u5927\u7279\u6027\u3002\u76f4\u63a5\u8bf4\u51fa\u8fd9\u51e0\u4e2a\u7684\u4e2d\u6587\u3002<\/p>\n\n\n\n
                        \u9694\u79bb\u7ea7\u522b<\/h3>\n\n\n\n
                        \u5f53\u6570\u636e\u5e93\u6709\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u6267\u884c<\/strong>\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u95ee\u9898\u3002<\/p>\n\n\n\n
                        \u810f\u8bfb\uff08dirty read\uff09\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\uff08non-repeatable read\uff09\u3001\u5e7b\u8bfb\uff08phantom read\uff09\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n
                          \n
                        • \u810f\u8bfb<\/strong><\/li>\n<\/ul>\n\n\n\n
                          \n
                          \u4e00\u4e2a\u4e8b\u52a1\u8bfb\u53d6\u5230\u4e86\u53e6\u5916\u4e00\u4e2a\u4e8b\u52a1\u6ca1\u6709\u63d0\u4ea4\u7684\u6570\u636e\u3002\uff08\u8fd9\u4e2a\u6bd4\u8f83\u4e25\u91cd\uff09<\/p>\n<\/blockquote>\n\n\n\n
                            \n
                          • \u4e0d\u53ef\u91cd\u590d\u8bfb<\/strong><\/li>\n<\/ul>\n\n\n\n
                            \n
                            \u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff0c\u8bfb\u53d6\u540c\u4e00\u4e2a\u6570\u636e\uff0c\u524d\u540e\u8bfb\u53d6\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u3002<\/p>\n<\/blockquote>\n\n\n\n
                            \n
                            \u901a\u5e38\u6307\u7684\u662f\uff0c\u5728\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff0c\u8bfb\u53d6\u5230\u4e86\u53e6\u5916\u4e00\u4e2a\u4e8b\u52a1\u5df2\u7ecf\u63d0\u4ea4\u7684\u6570\u636e\u3002<\/p>\n<\/blockquote>\n\n\n\n
                              \n
                            • \uff08\u865a\uff09\u5e7b\u8bfb<\/strong><\/li>\n<\/ul>\n\n\n\n
                              \n
                              \u6307\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\uff0c\u8bfb\u53d6\u540c\u4e00\u4e2a\u8868\u6570\u636e\uff0c\u524d\u540e\u8bfb\u53d6\u7684\u6570\u91cf\u4e0d\u4e00\u81f4\u3002<\/p>\n<\/blockquote>\n\n\n\n
                              \n
                              \u901a\u5e38\u6307\u7684\u662f\uff0c\u5728\u4e00\u4e2a\u4e8b\u52a1\uff0c\u8bfb\u53d6\u5230\u4e86\u53e6\u5916\u4e00\u4e2a\u4e8b\u52a1\u63d2\u5165\u6216\u8005\u5220\u9664\u7684\u6570\u636e\u3002<\/p>\n<\/blockquote>\n\n\n\n
                              \u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\uff1a<\/p>\n\n\n\n
                              \u4e00\u4e2a\u53c2\u6570\uff0c\u53ef\u4ee5\u7528\u6765\u63a7\u5236\u4e8b\u52a1\u548c\u4e8b\u52a1\u4e4b\u95f4\u7684\u9694\u79bb\u6027\u3002<\/p>\n\n\n\n
                                \n
                              • \u8bfb\u672a\u63d0\u4ea4<\/strong>\uff08read uncommitted\uff09<\/li>\n<\/ul>\n\n\n\n
                                \n
                                \u8bfb\u672a\u63d0\u4ea4\u662f\u6307\uff0c\u4e00\u4e2a\u4e8b\u52a1\u8fd8\u6ca1\u63d0\u4ea4\u65f6\uff0c\u5b83\u505a\u7684\u53d8\u66f4\u5c31\u80fd\u88ab\u522b\u7684\u4e8b\u52a1\u770b\u5230\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                \n
                                \u4f1a\u4ea7\u751f\u810f\u8bfb\u3002\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u5e7b\u8bfb \u4f1a\u4e0d\u4f1a\u9020\u6210\uff1f<\/p>\n<\/blockquote>\n\n\n\n
                                  \n
                                • \u8bfb\u5df2\u63d0\u4ea4<\/strong>\u00a0(read committed)<\/li>\n<\/ul>\n\n\n\n
                                  \n
                                  \u8bfb\u63d0\u4ea4\u662f\u6307\uff0c\u4e00\u4e2a\u4e8b\u52a1\u63d0\u4ea4\u4e4b\u540e\uff0c\u5b83\u505a\u7684\u53d8\u66f4\u624d\u4f1a\u88ab\u5176\u4ed6\u4e8b\u52a1\u770b\u5230\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                    \n
                                  • \u53ef\u91cd\u590d\u8bfb<\/strong>\u00a0(repeatable read)<\/li>\n<\/ul>\n\n\n\n
                                    \n
                                    \u8fd9\u4e2a\u662fMySQL\u9ed8\u8ba4\u7684\u9694\u79bb\u7ea7\u522b<\/strong><\/p>\n<\/blockquote>\n\n\n\n
                                    \n
                                    \u53ef\u91cd\u590d\u8bfb\u662f\u6307\uff0c\u4e00\u4e2a\u4e8b\u52a1\u6267\u884c\u8fc7\u7a0b\u4e2d\u770b\u5230\u7684\u6570\u636e\uff0c\u603b\u662f\u8ddf\u8fd9\u4e2a\u4e8b\u52a1\u5728\u542f\u52a8\u65f6\u770b\u5230\u7684\u6570\u636e\u662f\u4e00\u81f4\u7684\u3002\u5f53\u7136\u5728\u53ef\u91cd\u590d\u8bfb\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u672a\u63d0\u4ea4\u53d8\u66f4\u5bf9\u5176\u4ed6\u4e8b\u52a1\u4e5f\u662f\u4e0d\u53ef\u89c1\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                      \n
                                    • \u4e32\u884c\u5316<\/strong>\u00a0(serializable)<\/li>\n<\/ul>\n\n\n\n
                                      \n
                                      \u4e32\u884c\u5316\uff0c\u987e\u540d\u601d\u4e49\u662f\u5bf9\u4e8e\u540c\u4e00\u884c\u8bb0\u5f55\uff0c\u201c\u5199\u201d\u4f1a\u52a0\u201c\u5199\u9501\u201d\uff0c\u201c\u8bfb\u201d\u4f1a\u52a0\u201c\u8bfb\u9501\u201d\u3002\u5f53\u51fa\u73b0\u8bfb\u5199\u9501\u51b2\u7a81\u7684\u65f6\u5019\uff0c\u540e\u8bbf\u95ee\u7684\u4e8b\u52a1\u5fc5\u987b\u7b49\u524d\u4e00\u4e2a\u4e8b\u52a1\u6267\u884c\u5b8c\u6210\uff0c\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                      \n
                                      \u5b9e\u9645\u5de5\u4f5c\u4e2d\u5f88\u5c11\u91c7\u7528\u8be5\u7ea7\u522b\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                      \n
                                      \u6ce8\u610f\uff1a<\/strong>\u4f60\u9694\u79bb\u5f97\u8d8a\u4e25\u5b9e\uff0c\u6548\u7387\u5c31\u4f1a\u8d8a\u4f4e\u3002\u56e0\u6b64\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u90fd\u8981\u5728\u4e8c\u8005\u4e4b\u95f4\u5bfb\u627e\u4e00\u4e2a\u5e73\u8861\u70b9\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                      \u9694\u79bb\u7ea7\u522b\\\u4e8b\u52a1\u5e76\u53d1\u5f15\u8d77\u7684\u95ee\u9898<\/th>\u810f\u8bfb<\/th>\u4e0d\u53ef\u91cd\u590d\u8bfb<\/th>\u865a\u8bfb\/\u5e7b\u8bfb<\/th><\/tr><\/thead>
                                      \u8bfb\u672a\u63d0\u4ea4\uff08read uncommitted\uff09<\/td>\u00d7<\/td>\u00d7<\/td>\u00d7<\/td><\/tr>
                                      \u8bfb\u5df2\u63d0\u4ea4(read committed)<\/td>\u221a<\/td>\u00d7<\/td>\u00d7<\/td><\/tr>
                                      \u53ef\u91cd\u590d\u8bfb(repeatable read)<\/td>\u221a<\/td>\u221a<\/td>\u00d7<\/td><\/tr>
                                      \u4e32\u884c\u5316(serializable)<\/td>\u221a<\/td>\u221a<\/td>\u221a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                                      \u6f14\u793a<\/h3>\n\n\n\n
                                      \u7ee7\u7eed\u4f7f\u7528transaction\u8fd9\u4e2a\u5e93\uff0c\u6211\u4eec\u4f7f\u7528\u5176\u4e2d\u7684account_t\u8fd9\u4e2a\u8868<\/p>\n\n\n\n
                                      # \u4ee3\u8868\u6211\u8fdb\u5165\u4e4b\u540e\u4e0d\u7528\u8c03\u7528 use market  \u76f4\u63a5\u8fdb\u5165\u8fd9\u4e2a\u5e93\nmysql -uroot -p123456 market<\/code><\/pre>\n\n\n\n
                                      # \u83b7\u53d6\u5f53\u524d\u6570\u636e\u5e93\u7684\u9694\u79bb\u7ea7\u522b\nselect @@transaction_isolation;\n\n\n# \u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\nset global transaction isolation level \u9694\u79bb\u7ea7\u522b;\n\nset global transaction isolation level repeatable read; -- \u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u53ef\u91cd\u590d\u8bfb\n\n# \u8bfb\u672a\u63d0\u4ea4\nread uncommitted;\n# \u8bfb\u5df2\u63d0\u4ea4\nread committed;\n\n# \u53ef\u91cd\u590d\u8bfb\nrepeatable read\n\n# \u4e32\u884c\u5316\nserializable;\n\n# \u6ce8\u610f\u3002\u8bbe\u7f6e\u4e86\u9694\u79bb\u7ea7\u522b\u3002\u5fc5\u987b\u8981\u91cd\u65b0\u8fde\u63a5\u4e00\u4e0b\uff0c\u624d\u80fd\u751f\u6548\u3002<\/code><\/pre>\n\n\n\n
                                      \u810f\u8bfb\u95ee\u9898<\/strong><\/h4>\n\n\n\n
                                      \u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u8bfb\u672a\u63d0\u4ea4<\/strong>\uff0c\u5728\u5de6\u8fb9\u7684\u4e8b\u52a1\u6267\u884c\u67e5\u8be2\uff0c\u53f3\u8fb9\u7684\u4e8b\u52a1\u6267\u884c\u6570\u636e\u66f4\u65b0\uff0c\u5de6\u8fb9\u518d\u6b21\u6267\u884c\u67e5\u8be2\u65f6\u6570\u636e\u4ea7\u751f\u4e86\u53d8\u5316<\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u8bfb\u5df2\u63d0\u4ea4<\/strong>\uff0c\u5219\u53ef\u4ee5\u89e3\u51b3\u810f\u8bfb\u95ee\u9898<\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u4e0d\u53ef\u91cd\u590d\u8bfb<\/h4>\n\n\n\n
                                      \u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u8bfb\u5df2\u63d0\u4ea4<\/strong>\uff0c\u5728\u5de6\u8fb9\u7684\u4e8b\u52a1\u6267\u884c\u67e5\u8be2\uff0c\u53f3\u8fb9\u7684\u4e8b\u52a1\u6267\u884c\u6570\u636e\u66f4\u65b0\uff0c\u5e76\u4e14\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4<\/strong>\uff0c\u5de6\u8fb9\u518d\u6b21\u6267\u884c\u67e5\u8be2\u65f6\u6570\u636e\u4ea7\u751f\u4e86\u53d8\u5316\uff0c\u8fd9\u65f6\u5019\u5c31\u662f\u4e0d\u53ef\u91cd\u590d\u8bfb\u95ee\u9898<\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u8bbe\u7f6e\u9694\u79bb\u7ea7\u522b\u4e3a\u53ef\u91cd\u590d\u8bfb<\/strong>\uff0c\u53ef\u4ee5\u89e3\u51b3\u4e0d\u53ef\u91cd\u590d\u8bfb\u95ee\u9898\u3002<\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u5927\u5bb6\u5728\u4e0a\u56fe\u4e5f\u53ef\u4ee5\u770b\u51fa\uff0c\u5de6\u8fb9\u4e24\u6b21\u67e5\u8be2\u51fa\u6765\u7684\u6570\u636e\u6ca1\u6709\u4ea7\u751f\u53d8\u5316<\/p>\n\n\n\n
                                      (\u865a)\u5e7b\u8bfb<\/h4>\n\n\n\n
                                      \u5148\u4ecd\u7136\u4f7f\u7528\u8bfb\u5df2\u63d0\u4ea4<\/strong>\u8fd9\u4e2a\u9694\u79bb\u7ea7\u522b\uff0c\u5de6\u8fb9\u5148\u6267\u884c\u67e5\u8be2\uff0c\u53f3\u8fb9\u6267\u884c\u5220\u9664(\u6216\u65b0\u589e)\u64cd\u4f5c\uff0c\u7136\u540e\u6267\u884c\u4e8b\u52a1\u63d0\u4ea4\uff0c\u5de6\u8fb9\u67e5\u8be2\u5230\u7684\u6570\u636e\u91cf\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u8fd9\u5c31\u662f(\u865a)\u5e7b\u8bfb<\/strong><\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u73b0\u5728\u5c06\u9694\u79bb\u7ea7\u522b\u8c03\u6574\u4e3a\u53ef\u91cd\u590d\u8bfb<\/strong><\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      MySQL\u7684\u53ef\u91cd\u590d\u8bfb<\/strong>\uff0c\u53ef\u4ee5\u89e3\u51b3\u90e8\u5206\u5e7b\u8bfb\u95ee\u9898\uff0c\u4e0d\u80fd\u5b8c\u5168\u89e3\u51b3\u3002<\/p>\n\n\n\n
                                      \n
                                      MySQL\u7684InnoDB\u5b58\u50a8\u5f15\u64ce\u5728\u53ef\u91cd\u590d\u8bfb\uff08REPEATABLE READ\uff09\u9694\u79bb\u7ea7\u522b\u4e0b\u4f7f\u7528\u4e86\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff08MVCC\uff09\u6280\u672f\u6765\u51cf\u5c11\u5e7b\u8bfb\u7684\u53d1\u751f\u3002MVCC\u901a\u8fc7\u4e3a\u6bcf\u4e2a\u4e8b\u52a1\u63d0\u4f9b\u4e00\u4e2a\u4e00\u81f4\u7684\u6570\u636e\u5feb\u7167\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\uff0c\u4ece\u800c\u786e\u4fdd\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\u591a\u6b21\u6267\u884c\u76f8\u540c\u7684\u67e5\u8be2\u65f6\uff0c\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\u662f\u4e00\u81f4\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u6211\u4eec\u518d\u505a\u4e00\u4ef6\u4e8b\uff0c\u5728\u5de6\u8fb9\u7684\u4e8b\u52a1\u4e2d\uff0c\u6211\u4eec\u63d2\u5165\u4e00\u6761\u548c\u53f3\u4fa7\u4e00\u6837\u7684\u6570\u636e\uff0c\u4f46\u662f\u65e0\u6cd5\u63d2\u5165(\u4e0b\u9762\u7684\u7b2c5\u6b65)\uff0c\u8bf4\u660e\u5df2\u7ecf\u589e\u52a0\u4e86<\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u6211\u4eec\u518d\u518d\u505a\u4e00\u4ef6\u4e8b\u60c5\uff0c\u770b\u4e00\u4e0bMySQL\u5728\u53ef\u91cd\u590d\u8bfb<\/strong>\u7684\u9694\u79bb\u7ea7\u522b\u4e0b\uff0c\u51fa\u73b0\u865a\u5e7b\u8bfb<\/strong>\u7684\u95ee\u9898<\/p>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                      \u53e6\u4e00\u4e2a\u6848\u4f8b(\u9009\u770b)<\/h4>\n\n\n\n
                                      \u51c6\u5907\u6761\u4ef6\uff1a<\/strong>\u6709\u4e00\u5f20\u8868\uff0c\u8868\u91cc\u53ea\u6709\u4e00\u6761\u6570\u636e\u3002<\/p>\n\n\n\n
                                      create table t(\n\tvalue int\n);\ninsert into t values (1);\n<\/code><\/pre>\n\n\n\n
                                      \"\"<\/div><\/figure>\n\n\n\n
                                        \n
                                      • \u8bfb\u672a\u63d0\u4ea4\uff1aV1\u3001V2\u3001V3\u5747\u4e3a2\u3002<\/li>\n\n\n\n
                                      • \u8bfb\u5df2\u63d0\u4ea4: V1\u4e3a1\uff0cV2\u4e3a2\uff0cV3\u4e3a2<\/li>\n\n\n\n
                                      • \u53ef\u91cd\u590d\u8bfb\uff1a V1,V2\u4e3a1\uff0c V3\u4e3a2<\/li>\n\n\n\n
                                      • \u4e32\u884c\u5316: \u4e8b\u52a12\u4fee\u6539\u7684\u8fc7\u7a0b\u4e2d\u3002\u4f1a\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u4e8b\u52a11\u63d0\u4ea4<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
                                        \u51c6\u5907\u6570\u636e \u4ecb\u7ecd \u6570\u636e\u5e93\u7684\u8bbf\u95ee\u8fc7\u7a0b JDBC\u662f\u4ec0\u4e48 JDBC\uff08Java DataBase Connectivit […]<\/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":[],"class_list":["post-463","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/463","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=463"}],"version-history":[{"count":4,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/463\/revisions"}],"predecessor-version":[{"id":510,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/463\/revisions\/510"}],"wp:attachment":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/media?parent=463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/categories?post=463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/tags?post=463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}