{"id":10006197,"date":"2022-08-12T17:43:44","date_gmt":"2022-08-12T09:43:44","guid":{"rendered":"https:\/\/ityet.com\/?p=10006197"},"modified":"2022-08-12T17:43:44","modified_gmt":"2022-08-12T09:43:44","slug":"%e6%95%b0%e6%8d%ae%e5%88%86%e8%a1%a8mybatis-plus%e5%8a%a8%e6%80%81%e8%a1%a8%e5%90%8d%e6%9c%80%e4%bc%98%e6%96%b9%e6%a1%88%e7%9a%84%e6%8e%a2%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006197","title":{"rendered":"\u6570\u636e\u5206\u8868Mybatis Plus\u52a8\u6001\u8868\u540d\u6700\u4f18\u65b9\u6848\u7684\u63a2\u7d22"},"content":{"rendered":"<h2>\u4e00\u3001\u5e94\u7528\u573a\u666f<\/h2>\n<p>\u5927\u5bb6\u5728\u4f7f\u7528Mybatis\u8fdb\u884c\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u79cd\u60c5\u51b5\uff1a\u6309\u7167\u6708\u4efdmonth\u5c06\u6570\u636e\u653e\u5728\u4e0d\u540c\u7684\u8868\u91cc\u9762\uff0c\u67e5\u8be2\u6570\u636e\u7684\u65f6\u5019\u9700\u8981\u8ddf\u4e0d\u540c\u7684\u6708\u4efdmonth\u53bb\u67e5\u8be2\u4e0d\u540c\u7684\u8868\u3002<\/p>\n<p>\u4f46\u662f\u6211\u4eec\u90fd\u77e5\u9053\uff0cMybatis\u662fORM\u6301\u4e45\u5c42\u6846\u67b6\uff0c\u5373\uff1a\u5b9e\u4f53\u5173\u7cfb\u6620\u5c04\uff0c\u5b9e\u4f53Object\u4e0e\u6570\u636e\u5e93\u8868\u4e4b\u95f4\u662f\u5b58\u5728\u4e00\u4e00\u5bf9\u5e94\u7684\u6620\u5c04\u5173\u7cfb\u3002\u6bd4\u5982\uff1a<\/p>\n<pre><code>@Data\npublic class Student {\n    private Integer id;\n    private String stuName;\n    private Integer age;\n}<\/code><\/pre>\n<p>\u8868\u7ed3\u6784<\/p>\n<pre><code>CREATE TABLE `student` (\n    `id` INT(11) NOT NULL AUTO_INCREMENT,\n    `stu_name` VARCHAR(64) NOT NULL DEFAULT '0' COMMENT '\u59d3\u540d',\n    `age` INT(11) NOT NULL COMMENT '\u5e74\u9f84',\n    PRIMARY KEY (`id`)\n)\nCOMMENT='\u5b66\u751f\u8868'\nCOLLATE='utf8_general_ci'\nENGINE=InnoDB\n;<\/code><\/pre>\n<p>Student \u5b9e\u4f53\u7c7b\u4e0estudent\u8868\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\u5173\u7cfb\uff0c\u5982\u679c\u6211\u4eec\u5e0c\u671b\u5c06\u5b66\u5458\u8868\u6309\u7167\u6708\u4efd\u8fdb\u884c\u5206\u8868\uff0c\u6bd4\u5982\uff1astudent_202206\u3001student_202207\u3001student_202208\uff0c\u5373\u4ea7\u751f\u4e86<strong>\u4e00\u4e2a\u5b9e\u4f53\u7c7b\u53ca\u5176Mapper\u9700\u8981\u64cd\u4f5c\u591a\u4e2a\u6570\u636e\u5e93\u5206\u6708\u8868\uff0c\u8fd9\u79cd\u60c5\u51b5\u5728Mybatis plus\u4e0b\u6211\u4eec\u8be5\u5982\u4f55\u64cd\u4f5c\u6570\u636e\u5462\uff1f<\/strong> \u5176\u5b9e\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u6211\u5c06\u6211\u5b9e\u8df5\u4e2d\u603b\u7ed3\u51fa\u7684\u6700\u4f18\u65b9\u6848\u7ed9\u5927\u5bb6\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n<h2>\u4e8c\u3001\u52a8\u6001\u8868\u540d\u5904\u7406\u5668\u63a5\u53e3\u5b9e\u73b0<\/h2>\n<p>\u4e3a\u4e86\u5904\u7406\u4e0a\u8ff0\u7c7b\u4f3c\u7684\u95ee\u9898\uff0cmybatis plus\u63d0\u4f9b\u4e86\u52a8\u6001\u8868\u540d\u5904\u7406\u5668\u63a5\u53e3<code>TableNameHandler<\/code>\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\uff0c\u5e76\u5c06\u8fd9\u4e2a\u63a5\u53e3\u5e94\u7528\u914d\u7f6e\u751f\u6548\uff0c\u5373\u53ef\u5b9e\u73b0\u52a8\u6001\u8868\u540d\u3002<\/p>\n<blockquote>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n<ul>\n<li>\u5728mybatis plus 3.4\u7248\u672c\u4e4b\u524d\uff0c\u52a8\u6001\u8868\u540d\u5904\u7406\u5668\u63a5\u53e3\u662f<code>ITableNameHandler<\/code>, \u9700\u8981\u914d\u5408mybatis plus\u5206\u9875\u63d2\u4ef6\u4e00\u8d77\u4f7f\u7528\u624d\u80fd\u751f\u6548\u3002\u6211\u4eec\u8fd9\u91cc\u53ea\u4ecb\u7ecd3.4\u7248\u672c\u4e4b\u540e\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/li>\n<li>\u5728mybatis plus 3.4.3.2 \u4f5c\u5e9f\u8be5\u7684\u65b9\u5f0f\uff1adynamicTableNameInnerInterceptor.setTableNameHandlerMap(map); \u5927\u5bb6\u5982\u679c\u89c1\u5230\u8fd9\u79cd\u65b9\u5f0f\u5b9e\u73b0\u7684\u52a8\u6001\u8868\u540d\uff0c\u4e5f\u662f\u8fc7\u65f6\u7684\u5b9e\u73b0\u65b9\u6cd5\uff0c\u65b0\u7248\u672c\u4e2d\u8be5\u65b9\u6cd5\u5df2\u7ecf\u5220\u9664\u3002<\/li>\n<\/ul>\n<\/blockquote>\n<p>\u7ecf\u8fc7\u6211\u4e00\u6bb5\u65f6\u95f4\u7684\u5b9e\u8df5\u603b\u7ed3\uff0c\u6211\u7684\u5b9e\u73b0\u7c7b\u5982\u4e0b\uff08\u57fa\u4e8emybatis plus 3.4.3.2\u4e4b\u540e\u7684\u7248\u672c\uff09\uff1a<\/p>\n<pre><code>import com.baomidou.mybatisplus.extension.plugins.handler.TableNameHandler;\n\nimport java.util.Arrays;\nimport java.util.List;\n\n\/**\n * \u6309\u6708\u4efd\u53c2\u6570\uff0c\u7ec4\u6210\u52a8\u6001\u8868\u540d\n *\/\npublic class MonthTableNameHandler implements TableNameHandler {\n\n    \/\/\u7528\u4e8e\u8bb0\u5f55\u54ea\u4e9b\u8868\u53ef\u4ee5\u4f7f\u7528\u8be5\u6708\u4efd\u52a8\u6001\u8868\u540d\u5904\u7406\u5668\uff08\u5373\u54ea\u4e9b\u8868\u6309\u6708\u5206\u8868\uff09\n    private List&lt;String&gt; tableNames;\n    \/\/\u6784\u9020\u51fd\u6570\uff0c\u6784\u9020\u52a8\u6001\u8868\u540d\u5904\u7406\u5668\u7684\u65f6\u5019\uff0c\u4f20\u9012tableNames\u53c2\u6570\n    public MonthTableNameHandler(String ...tableNames) {\n        this.tableNames = Arrays.asList(tableNames);\n    }\n\n    \/\/\u6bcf\u4e2a\u8bf7\u6c42\u7ebf\u7a0b\u7ef4\u62a4\u4e00\u4e2amonth\u6570\u636e\uff0c\u907f\u514d\u591a\u7ebf\u7a0b\u6570\u636e\u51b2\u7a81\u3002\u6240\u4ee5\u4f7f\u7528ThreadLocal\n    private static final ThreadLocal&lt;String&gt; MONTH_DATA = new ThreadLocal&lt;&gt;();\n    \/\/\u8bbe\u7f6e\u8bf7\u6c42\u7ebf\u7a0b\u7684month\u6570\u636e\n    public static void setData(String month) {\n        MONTH_DATA.set(month);\n    }\n    \/\/\u5220\u9664\u5f53\u524d\u8bf7\u6c42\u7ebf\u7a0b\u7684month\u6570\u636e\n    public static void removeData() {\n        MONTH_DATA.remove();\n    }\n\n    \/\/\u52a8\u6001\u8868\u540d\u63a5\u53e3\u5b9e\u73b0\u65b9\u6cd5\n    @Override\n    public String dynamicTableName(String sql, String tableName) {\n        if (this.tableNames.contains(tableName)){\n            return tableName + &quot;_&quot; + MONTH_DATA.get();  \/\/\u8868\u540d\u589e\u52a0\u6708\u4efd\u540e\u7f00\n        }else{\n            return tableName;   \/\/\u8868\u540d\u539f\u6837\u8fd4\u56de\n        }\n    }\n}<\/code><\/pre>\n<p>\u5927\u5bb6\u5148\u5bf9\u4e0a\u9762\u7684\u4ee3\u7801\u6709\u4e00\u4e2a\u57fa\u7840\u4e86\u89e3\uff0c\u770b\u4e86\u4e0b\u9762\u7684\u6d4b\u8bd5\u8fc7\u7a0b\uff0c\u518d\u56de\u5934\u770b\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u7684\u6ce8\u91ca\uff0c\u5c31\u6bd4\u8f83\u597d\u7406\u89e3\u4e86\u3002\u8868\u540d\u5904\u7406\u5668\u5199\u597d\u4e86\u4e4b\u540e\uff0c\u6211\u4eec\u8981\u8ba9\u5b83\u751f\u6548\uff0c\u8fd8\u9700\u8981\u505a\u5982\u4e0b\u7684\u914d\u7f6e\u3002\u914d\u7f6e\u5185\u5bb9\u7167\u846b\u82a6\u753b\u74e2\u5c31\u53ef\u4ee5\u4e86\u3002\u9700\u8981\u5173\u6ce8\u7684\u90e8\u5206\uff0c\u6211\u90fd\u5df2\u7ecf\u7ed9\u5927\u5bb6\u6dfb\u52a0\u4e86\u6ce8\u91ca\u3002<\/p>\n<pre><code>@Configuration\n@MapperScan(&quot;com.zimug&quot;)\npublic class MybatisPlusConfig {\n\n    @Bean\n    public MybatisPlusInterceptor mybatisPlusInterceptor() {\n        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();\n        DynamicTableNameInnerInterceptor dynamicTableNameInnerInterceptor = new DynamicTableNameInnerInterceptor();\n        dynamicTableNameInnerInterceptor.setTableNameHandler(\n                \/\/\u53ef\u4ee5\u4f20\u591a\u4e2a\u8868\u540d\u53c2\u6570\uff0c\u6307\u5b9a\u54ea\u4e9b\u8868\u4f7f\u7528MonthTableNameHandler\u5904\u7406\u8868\u540d\u79f0\n                new MonthTableNameHandler(&quot;student&quot;,&quot;teacher&quot;) \n        );\n        \/\/\u4ee5\u62e6\u622a\u5668\u7684\u65b9\u5f0f\u5904\u7406\u8868\u540d\u79f0\n        interceptor.addInnerInterceptor(dynamicTableNameInnerInterceptor);\n        \/\/\u53ef\u4ee5\u4f20\u9012\u591a\u4e2a\u62e6\u622a\u5668\uff0c\u5373\uff1a\u53ef\u4ee5\u4f20\u9012\u591a\u4e2a\u8868\u540d\u5904\u7406\u5668TableNameHandler\n        \/\/interceptor.addInnerInterceptor(dynamicTableNameInnerInterceptor);\n        return interceptor;\n    }\n}<\/code><\/pre>\n<h2>\u4e09\u3001\u6d4b\u8bd5\u5b9e\u73b0\u6548\u679c<\/h2>\n<p>\u9996\u5148\u521b\u5efa\u4e00\u4e2aStudentMapper \uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0bStudentMapper \u53ea\u80fd\u64cd\u4f5cstudent\u8868\uff0c\u4e0d\u80fd\u64cd\u4f5cstudent_YYYYMM\u8868\u3002<\/p>\n<pre><code>@Mapper\npublic interface StudentMapper extends BaseMapper&lt;Student&gt; {}<\/code><\/pre>\n<p>\u4e0b\u9762\u6211\u4eec\u6765\u5199\u4e00\u4e2a\u5355\u5143\u6d4b\u8bd5\u7528\u4f8b\uff0c\u8be5\u6d4b\u8bd5\u7528\u4f8btest\u51fd\u6570\u6a21\u62df\u4e00\u6b21\u8bf7\u6c42\u8bbf\u95ee\u7684Controller\u6216\u8005service\u51fd\u6570\u3002<\/p>\n<pre><code>@SpringBootTest\nclass DynamicTableNameTest {\n    @Resource\n    private StudentMapper studentMapper;\n\n    @Test\n    void test() {\n        \/\/\u6267\u884c\u6570\u636e\u64cd\u4f5c\u4e4b\u524d\u8bbe\u7f6e\u6708\u4efd\uff08\u5b9e\u9645\u573a\u666f\u4e0b\u8be5\u53c2\u6570\u4ece\u8bf7\u6c42\u53c2\u6570\u4e2d\u89e3\u6790\uff09\n        MonthTableNameHandler.setData(&quot;202208&quot;);\n        studentMapper.selectById(1); \/\/\u4ee5id=2\u67e5\u8be2student_202208\u8fd9\u5f20\u8868\n        \/\/\u9605\u540e\u5373\u711a\uff0c\u5c06ThreadLocal\u5f53\u524d\u8bf7\u6c42\u7ebf\u7a0b\u7684\u6570\u636e\u79fb\u9664\n        MonthTableNameHandler.removeData();\n    }\n}<\/code><\/pre>\n<p>\u5f53\u6211\u4eec\u6267\u884c\u8fd9\u4e2a\u5355\u5143\u6d4b\u8bd5\u7528\u4f8b\u7684\u65f6\u5019\uff0c\u6211\u4eec\u53d1\u73b0\u63a7\u5236\u53f0\u6253\u5370\u51fa\u5982\u4e0b\u4fe1\u606f\uff0c\u6ce8\u610f\u770bSQL\u7684\u90e8\u5206\uff0c\u771f\u7684\u662f\u53bb\u67e5\u8be2student_202208\u8fd9\u5f20\u8868\u4e86\uff0c\u800c\u4e0d\u662fstudent\u8868\u3002\u8fd9\u8bf4\u660e\u6211\u4eec\u7684\u52a8\u6001\u8868\u540d\u5b9e\u73b0\u662f\u6210\u529f\u7684\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc1GY8\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u516c\u544a\u53f7\uff1a\u5b57\u6bcd\u54e5\u6742\u8c08\uff0c\u56de\u590d003\u8d60\u9001\u4f5c\u8005\u4e13\u680f\u300adocker\u4fee\u70bc\u4e4b\u9053\u300b\u7684PDF\u7248\u672c\uff0c30\u4f59\u7bc7\u7cbe\u54c1docker\u6587\u7ae0\u3002\u5b57\u6bcd\u54e5\u535a\u5ba2\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=kmAhVv1YMb3tKSbIYZo0iA%3D%3D.K88r4dN%2FnTkQf2an8Ud2qny3MtN5jfu4dX64Ca2%2B96E%3D\" rel=\"nofollow\">zimug.com<\/a><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042310211\">https:\/\/segmentfault.com\/a\/1190000042310211<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u5e94\u7528\u573a\u666f \u5927\u5bb6\u5728\u4f7f\u7528Mybatis\u8fdb\u884c\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u79cd\u60c5\u51b5\uff1a\u6309\u7167\u6708\u4efdmonth\u5c06\u6570\u636e\u653e\u5728\u4e0d\u540c\u7684\u8868 [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006197","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006197"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006197\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}