{"id":10006523,"date":"2022-09-19T15:13:47","date_gmt":"2022-09-19T07:13:47","guid":{"rendered":"https:\/\/ityet.com\/?p=10006523"},"modified":"2022-09-19T15:13:47","modified_gmt":"2022-09-19T07:13:47","slug":"%e5%be%ae%e6%9c%8d%e5%8a%a1%e5%bc%80%e5%8f%91%e7%b3%bb%e5%88%97%ef%bc%9a%e6%95%b0%e6%8d%ae%e5%ba%93-orm-%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006523","title":{"rendered":"\u5fae\u670d\u52a1\u5f00\u53d1\u7cfb\u5217\uff1a\u6570\u636e\u5e93 orm \u4f7f\u7528"},"content":{"rendered":"

\u6e90\u7801\u5730\u5740<\/a><\/p>\n

\u7cfb\u7edf\u4e2d\u4f7f\u7528 mybatis plus \u6846\u67b6\u4f5c\u4e3a\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684 orm \u6846\u67b6\u3002<\/p>\n

1 mybatis plus \u4f7f\u7528<\/h2>\n

1.1 \u4e0d\u4f7f\u7528 IService<\/h3>\n

mp \u4f7f\u7528\u63d0\u4f9b\u4e86\u4e00\u4e2a IService<\/code> \u7c7b\uff0c\u4f5c\u4e3a\u4e1a\u52a1\u5c42\u7684\u6269\u5c55\u3002<\/p>\n

\u4f46\u662f\u6846\u67b6\u4e2d\u4e0d\u5efa\u8bae\u8fd9\u79cd\u5c06\u4e1a\u52a1\u4ee3\u7801\u548c\u57fa\u7840\u529f\u80fd\u6df7\u5408\u7684\u505a\u6cd5\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4e1a\u52a1\u7684\u7075\u6d3b\u6027\u4e0b\u964d\uff0c\u8026\u5408\u5ea6\u8fc7\u9ad8\u3002<\/p>\n

\u5728\u6211\u7406\u89e3\u7684 spring boot<\/code> \u8bbe\u8ba1\u4e2d\uff0c\u503e\u5411\u4e8e\u8ba9\u5f00\u53d1\u4eba\u5458\u7684\u4e1a\u52a1\u4ee3\u7801\u5c3d\u91cf\u6241\u5e73\u5316\uff0c\u4e0d\u540c\u7c7b\u578b\u7684\u529f\u80fd\uff0c\u66f4\u52a0\u5efa\u8bae\u4f60\u4f7f\u7528\u591a\u4e2a\u7c7b\u7684\u65b9\u5f0f\uff0c\u7136\u540e\u901a\u8fc7\u6ce8\u5165\u8fd9\u4e2a\u7c7b\u83b7\u53d6\u4e0d\u540c\u7c7b\u578b\u7684\u529f\u80fd\u3002<\/p>\n

\u56e0\u6b64\u540c\u6837\u7684 controller \u5c42\u4e5f\u4e0d\u5efa\u8bae\u4f7f\u7528\u7ee7\u627f\u6765\u589e\u52a0\u989d\u5916\u7684\u529f\u80fd\u3002<\/p>\n

\u4e3a\u4e86\u8865\u5145\u4e00\u4e9b IService<\/code> \u7684\u529f\u80fd\uff0c\u6846\u67b6\u4e2d\u63d0\u4f9b\u4e86 PBaseMapper<\/code> \u6765\u589e\u5f3a BaseMapper\u3002<\/p>\n

\u81ea\u5df1\u505a\u589e\u5f3a\u7c7b\u7684\u597d\u5904\u4e4b\u4e00\u5c31\u662f\u7075\u6d3b\u3002<\/p>\n

PBaseMapper<\/code> \u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a ktUpdate<\/code> \u7684\u65b9\u6cd5\uff0c\u8fd4\u56de\u4e86\u7ecf\u8fc7 Enhancer<\/code> \u4ee3\u7406\u7684 KtUpdateChainWrapper<\/code> \u53d8\u91cf\u3002<\/p>\n

\u5b83\u7684\u4f5c\u7528\u662f\u5f53\u4f7f\u7528 set<\/code>\u65b9\u6cd5\u65f6\uff0c\u5224\u65ad\u4e00\u4e2a\u5b57\u6bb5\u662f\u5426\u6709 TableField<\/code> \u6ce8\u89e3\uff0c\u5982\u679c\u6709\u5219\u81ea\u52a8\u4fee\u6539 mapper<\/code> \u53c2\u6570\uff0c\u589e\u52a0 typeHandler<\/code> \u914d\u7f6e\uff0c\u6765\u9632\u6b62 mybatis plus \u5728\u66f4\u65b0\u65f6\u4f20\u9012\u7ed9 ibatis \u7684\u590d\u6742\u5bf9\u8c61\u5e8f\u5217\u5316\u5931\u8d25\u7684\u95ee\u9898\uff08\u8be6\u60c5\u89c1 issue<\/a>\uff09\u3002<\/p>\n

1.2 \u914d\u7f6e\u589e\u5f3a<\/h3>\n

\u5173\u4e8e mybatis plus\uff0c\u6846\u67b6\u4e2d\u505a\u4e86\u7edf\u4e00\u7684\u914d\u7f6e\u589e\u5f3a\uff0c\u8def\u5f84\u5728 business-foundation:cn.business.foundation.config.mybatis<\/code> \u4e2d\u3002<\/p>\n

\u4e0b\u9762\u5bf9\u8fd9\u51e0\u4e2a\u7c7b\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n

1.2.1 BaseEntity<\/h4>\n

\u57fa\u7840\u5b9e\u4f53\u7c7b\uff0c\u5305\u542b\u5982\u4e0b\u7684\u5b57\u6bb5\u3002<\/p>\n\n\n\n\n\n\n\n\n
\u5b57\u6bb5<\/th>\n\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n
createUserId<\/td>\n\u521b\u5efa\u4eba ID<\/td>\n<\/tr>\n
createTime<\/td>\n\u521b\u5efa\u65f6\u95f4<\/td>\n<\/tr>\n
modifyUserId<\/td>\n\u4fee\u6539\u4eba ID<\/td>\n<\/tr>\n
modifyTime<\/td>\n\u4fee\u6539\u65f6\u95f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u57fa\u7840\u5b9e\u4f53\u7c7b\u4e0d\u8981\u6c42\u5f3a\u5236\u7ee7\u627f\uff0c\u53ef\u4ee5\u81ea\u5df1\u9009\u62e9\u3002<\/p>\n

1.2.2 MetaObjectHandlerConfig<\/h4>\n

\u81ea\u52a8\u88c5\u8f7d\u7c7b\uff0c\u914d\u7f6e\u5ba1\u8ba1\u529f\u80fd\uff0c\u5f53\u5b9e\u4f53\u7c7b\u5305\u542b\u4e0a\u8ff0\u56db\u4e2a\u5b57\u6bb5\u65f6\uff0c\u4f1a\u505a\u76f8\u5e94\u7684\u5b57\u6bb5\u586b\u5145\u3002<\/p>\n

1.2.3 MybatisPlusConfig<\/h4>\n

\u81ea\u52a8\u72b6\u6001\u7c7b\uff0c\u914d\u7f6e\u4e0e mybatis plus \u76f8\u5173\u7684\u62e6\u622a\u5668\u6216\u8005\u5176\u5b83\u914d\u7f6e\u3002<\/p>\n

1.2.4 PBaseMapper<\/h4>\n

BaseMapper<\/code>\u00a0\u7684\u589e\u5f3a\u5b9e\u73b0\uff0c\u4ee3\u66ff mybatis plus \u63d0\u4f9b\u7684 com.baomidou.mybatisplus.extension.service.IService<\/code>\uff0c IService<\/code>\u00a0\u539f\u672c\u662f\u7528\u4e8e\u7ee7\u627f\u7ed9\u4e1a\u52a1\u4e2d\u7684 Service \u5c42\u4f7f\u7528\uff0c\u589e\u5f3a\u6570\u636e\u5e93\u7684\u80fd\u529b\uff0c\u4f46\u662f\u5728\u8fd9\u91cc\u8ba4\u4e3a\uff0cService \u5c42\u4e0d\u9002\u5408\u7ee7\u627f\u8fd9\u79cd\u7c7b\u578b\u7684\u7c7b\u3002<\/p>\n

1.3 jpa like \u80fd\u529b<\/h3>\n

mybatis plus \u57fa\u4e8e mybatis \u505a\u7684\u529f\u80fd\u5f3a\u5316\uff0c\u80fd\u591f\u5728\u5355\u8868\u7b80\u5355\u64cd\u4f5c\u4e0a\u80fd\u591f\u8fbe\u5230\u4e0e jpa \u975e\u5e38\u63a5\u8fd1\u7684\u6c34\u5e73\u3002<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u5408\u7406\u7684\u8fd0\u7528 mybatis plus \u63d0\u4f9b\u7684\u6269\u5c55\u80fd\u529b\uff0c\u5728\u5207\u6362\u6570\u636e\u5e93\u65f6\uff0c\u80fd\u591f\u6709\u6548\u7684\u964d\u4f4e\u8fc1\u79fb\u6210\u672c\uff0c\u6bd4\u5982\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801\u3002<\/p>\n

User user = userMapper.lambdaQuery()\n    .select(User::getPassword)\n    .eq(User::getAccount, account)\n    .oneOpt()\n    .orElseThrow(() -> {\n        log.warn("account not found {}", account);\n        return new InnerExp("\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef");\n    });<\/code><\/pre>\n
\u5728\u4ee3\u7801\u4e2d\u6ca1\u6709\u4f7f\u7528\u4efb\u4f55\u7684 sql \u5373\u53ef\u5b8c\u6210\u67e5\u8be2\uff0c\u4f46\u662f\u8fd9\u79cd\u64cd\u4f5c\u4ec5\u9650\u4e8e\u5355\u8868\u64cd\u4f5c\uff0c\u590d\u6742\u7684\u591a\u8868\u67e5\u8be2\u5fc5\u987b\u7528\u5230 xml \u5199 sql\u3002<\/p>\n
\n
\u5728\u4e0a\u9762\u67e5\u8be2\u4e2d\uff0c\u8bf7\u6ce8\u610f\u5230 User::getAccount<\/code> \u8fd9\u6837\u7684\u7528\u6cd5\uff0c\u5728\u4ee3\u7801\u4e2d\u5c3d\u91cf\u907f\u514d\u76f4\u63a5\u4f7f\u7528\u5e38\u91cf\u5b57\u7b26\u4e32\uff0c\u8fd9\u6837\u4f60\u5728\u4fee\u6539\u67d0\u4e2a\u5b57\u6bb5\u7684\u540d\u79f0\u65f6\uff0c\u5c31\u80fd\u591f\u5229\u7528\u73b0\u4ee3 IDE \u63d0\u4f9b\u7684\u4fee\u6539\u80fd\u529b\uff0c\u5c06\u6240\u7528\u5f15\u7528\u7edf\u4e00\u4fee\u6539\u3002<\/p>\n
\u4f8b\u5982\u5f53\u4f60\u5e0c\u671b\u83b7\u53d6\u5230 account<\/code> \u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528 User::getAccount.name<\/code>\u3002<\/p>\n<\/blockquote>\n
2 \u5206\u9875<\/h2>\n
2.1 PageParam<\/h3>\n
\u8def\u5f84 cn.business.foundation.common.page.PageParam<\/code>\u3002<\/p>\n
\u7528\u4e8e\u63a5\u6536\u524d\u7aef\u7684\u5206\u9875\u548c\u6392\u5e8f\u53c2\u6570\uff0c\u5728\u63a5\u6536\u6570\u636e\u65f6\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u63a5\u6536\uff0c\u628a\u5206\u9875\u53c2\u6570\u548c\u5176\u5b83\u53c2\u6570\u5206\u6210\u4e24\u4e2a\u53d8\u91cf\u63a5\u6536\uff0c\u8fd9\u6837\u5c31\u4e0d\u7528\u5728\u6bcf\u4e2a\u4f60\u8981\u63a5\u6536\u7684\u53d8\u91cf\u4e0a\u518d\u7ee7\u627f\u4e00\u4e2a\u5206\u9875\u7c7b\uff0c\u8fd9\u6837\u80fd\u591f\u66f4\u52a0\u7684\u7075\u6d3b\u3002<\/p>\n
    @GetMapping("\/query")\n    public RequestResult selectUsers(PageParam pageParam, UserDTO userDTO) {\n        return userService.selectUsers(pageParam, userDTO);\n    }<\/code><\/pre>\n
PageParam<\/code> \u8fd8\u5e94\u8be5\u63d0\u4f9b\u4e86\u8f6c\u5316\u6210\u67e5\u8be2\u6240\u9700\u7684\u5206\u9875\u5bf9\u8c61\uff0c\u6bd4\u5982\u6846\u67b6\u4e2d\u7684 PageParam<\/code> \u5c31\u63d0\u4f9b\u4e86 mybatis-plus \u7684\u5206\u9875\u5bf9\u8c61\uff0c\u540e\u7eed\u5982\u679c\u8fd8\u6709\u5176\u5b83\u7c7b\u578b\u7684\u67e5\u8be2\uff0c\u6bd4\u5982 elasticsearch \u67e5\u8be2\uff0c\u4e5f\u5e94\u8be5\u5728\u8fd9\u91cc\u63d0\u4f9b\u76f8\u5e94\u7684\u5206\u9875\u5bf9\u8c61\uff0c\u8fd9\u6837\u5c31\u80fd\u505a\u5230\u5206\u9875\u53c2\u6570\u7684\u7edf\u4e00\u7684\u3002<\/p>\n
\u5728\u5206\u9875\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u7edd\u5927\u90e8\u5206\u7c7b\u578b\u7684\u67e5\u8be2\uff0c\u53c2\u6570\u4e0a\u5b9e\u9645\u53ea\u6709\u4e09\u7c7b\uff1a<\/p>\n
    \n
  1. \u9875\u6570\u4e0e\u6761\u6570<\/li>\n
  2. \u6392\u5e8f\u5217<\/li>\n
  3. \u6392\u5e8f\u65b9\u5411<\/li>\n<\/ol>\n
    \u5b8c\u5168\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u7c7b\u6765\u4ee3\u66ff\uff0cspring data \u5b9e\u9645\u4e0a\u5c31\u63d0\u4f9b\u4e86\u4e00\u4e2a\u975e\u5e38\u597d\u7684\u8303\u4f8b\uff0cjpa \u4e0e elasticsearch \u7b49\u5176\u4ed6 data \u67b6\u6784\u4e0b\u9762\u7684\u5b9e\u73b0\uff0c\u90fd\u662f\u4f9d\u636e\u8fd9\u4e2a\u8303\u4f8b\u6765\u505a\u5230\u7edf\u4e00\u7684\uff0c\u8fd9\u4e2a\u601d\u60f3\u540c\u6837\u4e5f\u80fd\u6269\u5c55\u5230\u5176\u5b83\u9700\u8981\u5206\u9875\u7684\u67e5\u8be2\u3002<\/p>\n
    \u8fd8\u5e94\u8be5\u6ce8\u610f\u5230\uff0c\u5728\u5305 cn.vte.business.foundation.common.page<\/code> \u4e0b\uff0c\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6587\u4ef6 MybatisPlusPage<\/code>\uff0c\u63d0\u4f9b\u4e86 PageParam<\/code> \u5230 mybatis plus page<\/code> \u7684\u8f6c\u6362\u6269\u5c55\u51fd\u6570<\/strong>\u3002<\/p>\n
    \u5982\u679c\u5c06\u5176\u5199\u5165\u5230 PageParam<\/code> \u4e2d\uff0c\u6709\u4e9b\u6a21\u5757\u5728\u6ca1\u6709\u4f9d\u8d56 mybatis plus \u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u5bfc\u81f4 mybatis plus page<\/code> \u7684\u76f8\u5173\u7c7b\u627e\u4e0d\u5230\u3002<\/p>\n
    \u76f8\u540c\u7684\u601d\u8def\u540c\u6837\u9002\u7528\u4e8e elasticsearch\u3002<\/p>\n
    \u8fd9\u4e5f\u662f kotlin  \u6269\u5c55\u51fd\u6570\u5e26\u6765\u7684\u8bbe\u8ba1\u4e0a\u7684\u4f18\u70b9\u3002<\/p>\n
    2.2 PageResult<\/h3>\n
    \u8def\u5f84 cn.business.foundation.common.page.PageResult<\/code>\u3002<\/p>\n
    \u6709\u5206\u9875\u53c2\u6570\u5c31\u6709\u5206\u9875\u7ed3\u679c\uff0c\u8fd9\u4e2a\u7c7b\u5c31\u662f\u7528\u4e8e\u8fd4\u56de\u5206\u9875\u7ed3\u679c\u7684\u3002\u8bbe\u7f6e\u4e3a RequestResult \u7684 value \u5373\u53ef\u3002<\/p>\n
    \u4e0e 2.1 \u4e2d\u4f7f\u7528\u7684\u601d\u60f3\u4e00\u6837\uff0c\u9002\u7528\u4e8e\u5206\u9875\u7684\u8fd4\u56de\u7ed3\u679c\uff0c\u90fd\u5e94\u8be5\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u8f6c\u5316\u4e00\u904d\uff0c\u65b9\u4fbf\u7edf\u4e00\u8f93\u51fa\u3002<\/p>\n
    \u5982\u679c\u6d89\u53ca\u5230\u5176\u5b83\u6570\u636e\u5e93\u7684\u7c7b\u578b\u8f6c\u6362\uff0c\u505a\u6cd5\u7c7b\u4f3c\u4e8e cn.vte.business.foundation.common.page.MybatisPlusPage<\/code> \uff0c\u4f7f\u7528\u6269\u5c55\u7684\u65b9\u5f0f\u63d0\u4f9b\u65b0\u7684\u7c7b\u578b\u8f6c\u6362\u65b9\u5f0f\uff0c\u9632\u6b62\u51fa\u73b0 ClassNotFoundException<\/code> \u5f02\u5e38\u3002<\/p>\n
    3 mapper xml \u6587\u4ef6\u4f4d\u7f6e<\/h2>\n
    \u5728\u6846\u67b6\u4e2d\uff0c\u8981\u6c42 mapper xml \u4e0e\u5b9e\u4f8b\u7c7b\u6587\u4ef6\u653e\u7f6e\u5728\u4e00\u8d77\u3002\u5728\u4e00\u4e9b\u9879\u76ee\u4e2d\u5e38\u5e38\u89c1\u5230 xml \u662f\u653e\u5728 resources \u4e0b\u9762\u7684\uff0c\u8fd9\u6837\u6211\u89c9\u5f97\u8df3\u8f6c\u8d77\u6765\uff0c\u4f1a\u5bfc\u81f4\u76ee\u5f55\u8f83\u4e71\uff0c\u6240\u4ee5\u8fd9\u91cc\u628a java \u548c xml \u653e\u5728\u4e00\u8d77\uff0c\u5f00\u53d1\u8d77\u6765\u65b9\u4fbf\u4e00\u70b9\u3002<\/p>\n
    \u62f7\u8d1d xml \u6587\u4ef6\u5230\u7f16\u8bd1\u4f4d\u7f6e\u7684\u914d\u7f6e\u5728 server:build.gradle.kts<\/code>\u00a0\u4e2d\u3002<\/p>\n
    https:\/\/segmentfault.com\/a\/1190000042510029<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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