{"id":203188,"date":"2025-05-22T12:04:25","date_gmt":"2025-05-22T04:04:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203188\/"},"modified":"2025-05-22T12:04:25","modified_gmt":"2025-05-22T04:04:25","slug":"mybatis-plus-list%e6%9f%a5%e8%af%a2%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e8%bf%94%e5%9b%9e%e7%b1%bb%e5%9e%8b%e4%bc%9a%e5%8c%85%e5%90%ab%e4%be%9d%e8%b5%96%e4%bf%a1%e6%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203188\/","title":{"rendered":"Mybatis-Plus List\u67e5\u8be2\uff1a\u4e3a\u4ec0\u4e48\u8fd4\u56de\u7c7b\u578b\u4f1a\u5305\u542b\u4f9d\u8d56\u4fe1\u606f\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Mybatis-Plus List\u67e5\u8be2\uff1a\u4e3a\u4ec0\u4e48\u8fd4\u56de\u7c7b\u578b\u4f1a\u5305\u542b\u4f9d\u8d56\u4fe1\u606f\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u4eca\u5929\u672c\u4eba\u7ed9\u5927\u5bb6\u5e26\u6765\u6587\u7ae0\u300aMybatis-Plus List\u67e5\u8be2\uff1a\u4e3a\u4ec0\u4e48\u8fd4\u56de\u7c7b\u578b\u4f1a\u5305\u542b\u4f9d\u8d56\u4fe1\u606f\uff1f\u300b<\/span>\uff0c\u6587\u4e2d\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span><\/span>\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0<\/span>\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u90a3\u5c31\u8bf7\u5404\u4f4d\u670b\u53cb\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427~\u5e0c\u671b\u80fd\u771f\u6b63\u5e2e\u5230\u4f60\u4eec\uff0c\u8c22\u8c22\uff01<\/p>\n

<\/p>\n

mybatis-plus list\u67e5\u8be2\u8fd4\u56de\u7c7b\u578b\u5dee\u5f02<\/strong><\/p>\n

mybatis-plus\u65e8\u5728\u7b80\u5316\u6301\u4e45\u5c42\u5f00\u53d1\uff0c\u5e76\u63d0\u4f9b\u4e00\u7cfb\u5217\u5f3a\u5927\u7684\u7279\u6027\u3002\u7136\u800c\uff0c\u5728\u4f7f\u7528list\u67e5\u8be2\u65f6\uff0c\u6709\u65f6\u53ef\u80fd\u4f1a\u9047\u5230\u4e0e\u9884\u671f\u4e0d\u540c\u7684\u8fd4\u56de\u7ed3\u679c\u7c7b\u578b\u3002\u8ba9\u6211\u4eec\u6df1\u5165\u63a2\u8ba8\u4e00\u4e0b\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n

\u95ee\u9898\u63cf\u8ff0<\/strong><\/p>\n

\u5982\u679c\u67e5\u8be2\u65f6\u540c\u65f6\u5f15\u7528\u4e86\u5305\u542b\u591a\u4e2a\u4f9d\u8d56\u7684\u5b9e\u4f53\u7c7b\u548c\u4e0d\u5305\u542b\u4f9d\u8d56\u7684\u5b9e\u4f53\u7c7b\uff0c\u5373\u4f7f\u4e0d\u4f7f\u7528\u4f9d\u8d56\u5c5e\u6027\u8fdb\u884c\u67e5\u8be2\uff0c\u6700\u7ec8\u8fd4\u56de\u7684\u7ed3\u679c\u4ecd\u7136\u5305\u542b\u4e86\u4f9d\u8d56\u4fe1\u606f\u3002<\/p>\n

\u53ef\u80fd\u7684\u89e3\u91ca<\/strong><\/p>\n

\u8fd9\u79cd\u73b0\u8c61\u901a\u5e38\u4e0e\u5b9e\u4f53\u7c7b\u7684\u5173\u7cfb\u6620\u5c04\u548c\u61d2\u52a0\u8f7d\u673a\u5236\u6709\u5173\u3002\u5728mybatis-plus\u4e2d\uff0c\u5b9e\u4f53\u7c7b\u4e4b\u95f4\u7684\u5173\u7cfb\u53ef\u4ee5\u901a\u8fc7\u6ce8\u89e3\u6216xml\u914d\u7f6e\u8fdb\u884c\u6620\u5c04\uff0c\u800c\u61d2\u52a0\u8f7d\u5219\u5141\u8bb8\u5728\u9700\u8981\u65f6\u624d\u8fdb\u884c\u5173\u8054\u67e5\u8be2\u3002\u867d\u7136\u5728\u67e5\u8be2\u4e2d\u4e0d\u4f7f\u7528\u5173\u8054\u5c5e\u6027\uff0c\u4f46mybatis-plus\u4ecd\u7136\u4f1a\u68c0\u67e5\u5b9e\u4f53\u7c7b\u4e0e\u5176\u4ed6\u5b9e\u4f53\u7c7b\u7684\u5173\u7cfb\u6620\u5c04\uff0c\u5e76\u52a0\u8f7d\u5173\u8054\u4fe1\u606f\u4ee5\u5907\u540e\u7528\u3002<\/p>\n

\u793a\u4f8b\uff1a<\/strong><\/p>\n

@Entity\npublic class User {\n    \/\/ ...\n\n    @ManyToOne(fetch = FetchType.LAZY)\n    private Department department;\n}\n\n@Entity\npublic class Department {\n    \/\/ ...\n}\n\n\/\/ \u6267\u884c\u67e5\u8be2\nList<User> users = userMapper.selectUsers();<\/pre>\n
\u5728\u4e0a\u9762\u793a\u4f8b\u4e2d\uff0c\u867d\u7136\u67e5\u8be2\u672a\u6d89\u53cadepartment\u5c5e\u6027\uff0c\u4f46\u7531\u4e8euser\u7c7b\u4e0edepartment\u7c7b\u4e4b\u95f4\u5b58\u5728\u5173\u7cfb\u6620\u5c04\uff0c\u5e76\u4e14department\u5c5e\u6027\u914d\u7f6e\u4e86\u61d2\u52a0\u8f7d\uff0c\u6240\u4ee5\u67e5\u8be2\u7ed3\u679c\u4ecd\u7136\u4f1a\u5305\u542b\u5173\u8054\u7684department\u4fe1\u606f\uff0c\u8fd4\u56de\u7c7b\u578b\u4e3alist<user>\u3002<\/p>\n
\u89e3\u51b3\u65b9\u6cd5<\/strong><\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6709\u51e0\u4e2a\u9009\u9879\uff1a<\/p>\n
    \n
  • \u663e\u5f0f\u6392\u9664\u5173\u8054\u5c5e\u6027\uff1a<\/strong>\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\uff0c\u4f7f\u7528fetch = jointype.left\u6216fetch = jointype.inner\u663e\u5f0f\u6392\u9664\u4e0d\u5fc5\u8981\u7684\u5173\u8054\u5c5e\u6027\u3002<\/li>\n
  • \u4f7f\u7528eager\u52a0\u8f7d\uff1a<\/strong>\u901a\u8fc7\u914d\u7f6efetch = fetchtype.eager\uff0c\u5728\u67e5\u8be2\u65f6\u7acb\u5373\u52a0\u8f7d\u5173\u8054\u4fe1\u606f\u3002<\/li>\n
  • \u4f7f\u7528dto\uff08\u6570\u636e\u4f20\u8f93\u5bf9\u8c61\uff09\uff1a<\/strong>\u521b\u5efa\u4e13\u95e8\u7528\u4e8e\u67e5\u8be2\u7ed3\u679c\u7684dto\uff0c\u53ea\u5305\u542b\u67e5\u8be2\u6240\u9700\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n
    \u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u63a7\u5236mybatis-plus\u67e5\u8be2\u7684\u8fd4\u56de\u7ed3\u679c\u7c7b\u578b\uff0c\u5e76\u786e\u4fdd\u53ea\u8fd4\u56de\u6240\u9700\u7684\u4fe1\u606f\u3002<\/p>\n
    \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aMybatis-Plus List\u67e5\u8be2\uff1a\u4e3a\u4ec0\u4e48\u8fd4\u56de\u7c7b\u578b\u4f1a\u5305\u542b\u4f9d\u8d56\u4fe1\u606f\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Mybatis-Plus Lis...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203188","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203188","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203188"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203188\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}