{"id":7925,"date":"2024-11-14T17:15:27","date_gmt":"2024-11-14T09:15:27","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7925\/"},"modified":"2024-11-14T17:15:27","modified_gmt":"2024-11-14T09:15:27","slug":"%e5%9c%a8-java-%e4%bb%a3%e7%a0%81%e8%bf%98%e6%98%af-mysql-where-%e5%ad%90%e5%8f%a5%e4%b8%ad%e6%89%a7%e8%a1%8c%e8%bf%90%e7%ae%97%e6%93%8d%e4%bd%9c%e6%9b%b4%e4%bc%98%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7925\/","title":{"rendered":"\u5728 Java \u4ee3\u7801\u8fd8\u662f MySQL WHERE \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97\u64cd\u4f5c\u66f4\u4f18\uff1f"},"content":{"rendered":"

\"\u5728<\/p>\n

\u5728 java \u4ee3\u7801\u8fd8\u662f where \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97\u64cd\u4f5c\uff1f<\/strong><\/p>\n

\u5728\u8bbe\u8ba1\u6570\u636e\u5e93\u67e5\u8be2\u65f6\uff0c\u4f1a\u9047\u5230\u4e00\u4e2a\u51b3\u7b56\uff1a\u8fd0\u7b97\u64cd\u4f5c\u5e94\u8be5\u5728 java \u4ee3\u7801\u4e2d\u6267\u884c\u8fd8\u662f\u5728 mysql \u7684 where \u5b50\u53e5\u4e2d\u6267\u884c\u3002\u672c\u6587\u5c06\u8ba8\u8bba\u6b64\u95ee\u9898\u7684\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n

\u8003\u8651\u4ee5\u4e0b\u573a\u666f\uff1a\u7d22\u5f15\u5217\u4e3a age \u7684\u7528\u6237\u8868\u4e2d\u5305\u542b\u5927\u91cf\u8bb0\u5f55\u3002\u73b0\u5728\u9700\u8981\u67e5\u8be2\u6240\u6709 age \u503c\u5927\u4e8e\u7279\u5b9a\u503c\u7684\u7528\u6237\u3002<\/p>\n

\u5728 mysql where \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97<\/strong><\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

\u4e00\u79cd\u65b9\u6cd5\u662f\u76f4\u63a5\u5728 where \u5b50\u53e5\u4e2d\u5c06 age \u503c\u52a0 1 \u5e76\u8fdb\u884c\u6bd4\u8f83\uff0c\u5982\u4e0b\u9762\u7684 mybatis \u4ee3\u7801\u6240\u793a\uff1a<\/p>\n

select id, age\nfrom users\nwhere age in\n<if test=\"ages != null and ages.size() > 0\">\n    <foreach item=\"age\" collection=\"ages\" open=\"(\" separator=\",\" close=\")\">\n        #{age}+1\n    <\/foreach>\n<\/if><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u7b80\u5316\u4e86 mybatis \u4ee3\u7801\uff0c\u51cf\u5c11\u4e86\u5fc5\u9700\u7684 java \u4ee3\u7801\u91cf\u3002\u7136\u800c\uff0c\u8fd9\u79cd\u65b9\u6cd5\u6709\u4e00\u4e2a\u91cd\u5927\u7f3a\u70b9\uff1a\u5b83\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u3002<\/p>\n
\u7d22\u5f15\u5931\u6548<\/strong><\/p>\n
\u6570\u636e\u5e93\u901a\u8fc7\u7d22\u5f15\u6765\u5feb\u901f\u67e5\u627e\u6570\u636e\u3002\u7d22\u5f15\u662f\u6570\u636e\u8868\u4e2d\u7279\u5b9a\u5217\u7684\u503c\u7684\u6392\u5e8f\u5217\u8868\u3002\u5f53\u4f7f\u7528\u7d22\u5f15\u5217\u8fdb\u884c\u7b5b\u9009\u67e5\u8be2\u65f6\uff0c\u6570\u636e\u5e93\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u6765\u76f4\u63a5\u67e5\u627e\u6240\u9700\u6570\u636e\uff0c\u800c\u65e0\u9700\u626b\u63cf\u6574\u4e2a\u8868\u3002<\/p>\n
\u5f53\u6211\u4eec\u5728 where \u5b50\u53e5\u4e2d\u8fdb\u884c\u8fd0\u7b97\u65f6\uff0c\u7d22\u5f15\u5c31\u4e0d\u80fd\u518d\u7528\u4e8e\u52a0\u901f\u67e5\u8be2\u3002\u8fd9\u662f\u56e0\u4e3a\u6570\u636e\u5e93\u65e0\u6cd5\u9884\u6d4b\u8fd0\u7b97\u7ed3\u679c\uff0c\u53ea\u80fd\u626b\u63cf\u6574\u4e2a\u8868\u4ee5\u67e5\u627e\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u3002<\/p>\n
\u5728 java \u4ee3\u7801\u4e2d\u6267\u884c\u8fd0\u7b97<\/strong><\/p>\n
\u4e3a\u4e86\u907f\u514d\u7d22\u5f15\u5931\u6548\uff0c\u5efa\u8bae\u5728 java \u4ee3\u7801\u4e2d\u6267\u884c\u8fd0\u7b97\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u5c06 age \u503c\u52a0 1\uff1a<\/p>\n
int[] ages = { ... };\nfor (int i = 0; i < ages.length; i++) {\n    ages[i] += 1;\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u8c03\u6574\u540e\u7684\u5e74\u9f84\u503c\u6784\u5efa mybatis \u67e5\u8be2\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
SELECT id, age\nFROM users\nWHERE age IN <foreach item=\"age\" collection=\"ages\">#{age}<\/foreach><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4fdd\u7559\u4e86\u7d22\u5f15\uff0c\u5e76\u786e\u4fdd\u67e5\u8be2\u6027\u80fd\u4e0d\u53d7\u8fd0\u7b97\u64cd\u4f5c\u7684\u5f71\u54cd\u3002<\/p>\n
\u7ed3\u8bba<\/strong><\/p>\n
\u5728\u8003\u8651\u5728 java \u4ee3\u7801\u4e2d\u8fd8\u662f\u5728 mysql where \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97\u64cd\u4f5c\u65f6\uff0c\u5efa\u8bae\u4f18\u5148\u8003\u8651\u5c06\u8fd0\u7b97\u64cd\u4f5c\u653e\u5728 java \u4ee3\u7801\u4e2d\u3002\u8fd9\u4e00\u7b56\u7565\u6709\u52a9\u4e8e\u4fdd\u6301\u7d22\u5f15\u7684\u6709\u6548\u6027\uff0c\u5e76\u786e\u4fdd\u67e5\u8be2\u5177\u6709\u6700\u4f73\u6027\u80fd\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u5728 Java \u4ee3\u7801\u8fd8\u662f MySQL WHERE \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97\u64cd\u4f5c\u66f4\u4f18\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728 java \u4ee3\u7801\u8fd8\u662f where \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97\u64cd\u4f5c\uff1f \u5728\u8bbe\u8ba1\u6570\u636e\u5e93\u67e5\u8be2\u65f6\uff0c\u4f1a\u9047\u5230\u4e00\u4e2a\u51b3\u7b56\uff1a\u8fd0\u7b97\u64cd\u4f5c\u5e94\u8be5\u5728 java \u4ee3\u7801\u4e2d\u6267\u884c\u8fd8\u662f\u5728 mysql \u7684 where \u5b50\u53e5\u4e2d\u6267\u884c\u3002\u672c\u6587\u5c06\u8ba8\u8bba\u6b64\u95ee\u9898\u7684\u6700\u4f73\u5b9e\u8df5\u3002 \u8003\u8651\u4ee5\u4e0b\u573a\u666f\uff1a\u7d22\u5f15\u5217\u4e3a age \u7684\u7528\u6237\u8868\u4e2d\u5305\u542b\u5927\u91cf\u8bb0\u5f55\u3002\u73b0\u5728\u9700\u8981\u67e5\u8be2\u6240\u6709 age \u503c\u5927\u4e8e\u7279\u5b9a\u503c\u7684\u7528\u6237\u3002 \u5728 mysql where \u5b50\u53e5\u4e2d\u6267\u884c\u8fd0\u7b97 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4e00\u79cd\u65b9\u6cd5\u662f\u76f4\u63a5\u5728 where \u5b50\u53e5\u4e2d\u5c06 age \u503c\u52a0 1 \u5e76\u8fdb\u884c\u6bd4\u8f83\uff0c\u5982\u4e0b\u9762\u7684 mybatis \u4ee3\u7801\u6240\u793a\uff1a select id, age from users where age in <if test=”ages != null and ages.size() > 0″> <foreach item=”age” collection=”ages” open=”(” separator=”,” close=”)”> #{age}+1 <\/foreach> […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7925","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7925","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=7925"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7925\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}