{"id":203976,"date":"2025-05-22T13:24:21","date_gmt":"2025-05-22T05:24:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203976\/"},"modified":"2025-05-22T13:24:21","modified_gmt":"2025-05-22T05:24:21","slug":"mybatis%e4%b8%ad%e5%a6%82%e4%bd%95%e6%a0%b9%e6%8d%ae%e5%8f%98%e9%87%8f%e5%80%bc%e5%8a%a8%e6%80%81%e6%89%a7%e8%a1%8c%e4%b8%8d%e5%90%8c%e7%9a%84sql%e8%af%ad%e5%8f%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203976\/","title":{"rendered":"MyBatis\u4e2d\u5982\u4f55\u6839\u636e\u53d8\u91cf\u503c\u52a8\u6001\u6267\u884c\u4e0d\u540c\u7684SQL\u8bed\u53e5\uff1f"},"content":{"rendered":"

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

MyBatis\u4e2d\u5982\u4f55\u6839\u636e\u53d8\u91cf\u503c\u52a8\u6001\u6267\u884c\u4e0d\u540c\u7684SQL\u8bed\u53e5\uff1f <\/h1>\n

\u5bf9\u4e8e\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aMyBatis\u4e2d\u5982\u4f55\u6839\u636e\u53d8\u91cf\u503c\u52a8\u6001\u6267\u884c\u4e0d\u540c\u7684SQL\u8bed\u53e5\uff1f \u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

<\/p>\n

\u6839\u636e\u53d8\u91cf\u503c\u52a8\u6001\u6267\u884c sql<\/strong><\/p>\n

\u5728 mybatis \u4e2d\uff0c\u7f16\u5199 xml \u6620\u5c04\u6587\u4ef6\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728 sql \u8bed\u53e5\u4e2d\u4f7f\u7528\u6761\u4ef6\u5224\u65ad\u6765\u5b9e\u73b0\u6839\u636e\u53d8\u91cf\u503c\u52a8\u6001\u6267\u884c\u4e0d\u540c\u7684 sql \u8bed\u53e5\u3002<\/p>\n

\u4e3a\u4e86\u5b9e\u73b0\u6839\u636e\u5168\u5c40\u914d\u7f6e\u7c7b\uff08\u5982 globalvariable\uff09\u4e2d\u7684\u53d8\u91cf\u503c\u6267\u884c\u4e0d\u540c\u7684 sql \u8bed\u53e5\uff0c\u53ef\u4ee5\u4f7f\u7528 <if> \u6761\u4ef6\u5224\u65ad\u6807\u7b7e\u3002\u4f8b\u5982\uff1a<\/p>\n

<select id=\"selectone\">\n    <if test=\"databasetype == 1\">\n        <!-- mysql \u7684 sql \u8bed\u53e5 -->\n    <\/if>\n    <if test=\"databasetype == 2\">\n        <!-- \u8fbe\u68a6\u7684 sql \u8bed\u53e5 -->\n    <\/if>\n<\/select><\/pre>\n
\u5728 xml \u6587\u4ef6\u4e2d\u4f7f\u7528 <if> \u6761\u4ef6\u5224\u65ad\u6807\u7b7e\u65f6\uff0ctest \u5c5e\u6027\u6307\u5b9a\u8981\u6d4b\u8bd5\u7684\u6761\u4ef6\uff0c\u5982\u679c\u6761\u4ef6\u4e3a true\uff0c\u5219\u6267\u884c\u6807\u7b7e\u5185\u90e8\u7684 sql \u8bed\u53e5\u3002<\/p>\n
\u53e6\u5916\uff0cmybatis \u4e5f\u53ef\u4ee5\u6839\u636e\u6570\u636e\u5e93\u7c7b\u578b\u81ea\u52a8\u9009\u62e9\u4e0d\u540c\u7684 sql \u8bed\u53e5\u3002\u901a\u8fc7\u5728\u6620\u5c04\u6587\u4ef6\u4e2d\u914d\u7f6e\u4e0d\u540c\u7684 <select> \u8bed\u53e5\u5e76\u6307\u5b9a\u76f8\u5e94\u7684 databaseid\uff0cmybatis \u4f1a\u6839\u636e databaseidprovider \u83b7\u53d6\u5f53\u524d\u6570\u636e\u5e93\u7c7b\u578b\uff0c\u5e76\u9009\u62e9\u4e0e\u8be5\u6570\u636e\u5e93\u7c7b\u578b\u5339\u914d\u7684 sql \u8bed\u53e5\u6267\u884c\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
<select id=\"selectAll\" resultType=\"com.alen.trial.multilds.model.Multil\" databaseId=\"mysql\">\n    select * from multil\n<\/select>\n<select id=\"selectAll\" resultType=\"com.alen.trial.multilds.model.Multil\" databaseId=\"oracle\">\n    select id from multil\n<\/select><\/pre>\n
\u672c\u7bc7\u5173\u4e8e\u300aMyBatis\u4e2d\u5982\u4f55\u6839\u636e\u53d8\u91cf\u503c\u52a8\u6001\u6267\u884c\u4e0d\u540c\u7684SQL\u8bed\u53e5\uff1f \u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
MyBatis\u4e2d\u5982\u4f55\u6839\u636e\u53d8\u91cf\u503c\u52a8...<\/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-203976","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203976","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=203976"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203976\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}