{"id":7830,"date":"2024-11-14T08:41:28","date_gmt":"2024-11-14T00:41:28","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7830\/"},"modified":"2024-11-14T08:41:28","modified_gmt":"2024-11-14T00:41:28","slug":"mybatis-%e4%b8%ad%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8%e6%95%b0%e6%8d%ae%e5%ba%93%e5%8e%82%e5%95%86%e6%a0%87%e8%af%86%e5%ae%9e%e7%8e%b0%e5%8a%a8%e6%80%81-sql-%e8%af%ad%e5%8f%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7830\/","title":{"rendered":"MyBatis \u4e2d\u5982\u4f55\u5229\u7528\u6570\u636e\u5e93\u5382\u5546\u6807\u8bc6\u5b9e\u73b0\u52a8\u6001 SQL \u8bed\u53e5\uff1f"},"content":{"rendered":"

\"MyBatis<\/p>\n

\u6839\u636e\u53d8\u91cf\u503c\u6267\u884c\u52a8\u6001 sql \u8bed\u53e5<\/strong><\/p>\n

\u5728 mybatis \u4e2d\u7f16\u5199 xml \u6587\u4ef6\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6570\u636e\u5e93\u5382\u5546\u6807\u8bc6\uff08databaseidprovider\uff09\u6839\u636e\u53d8\u91cf\u503c\u6267\u884c\u4e0d\u540c\u7684 sql \u8bed\u53e5\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u5168\u5c40\u914d\u7f6e\u7c7b\uff1a<\/p>\n

public class globalvariable {\n    public int databasetype; \/\/\u6570\u636e\u5e93\u7c7b\u578b\uff0c1mysql\uff0c2\u8fbe\u68a6\n}<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u6211\u4eec\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u5728 xml \u6587\u4ef6\u4e2d\u5b9e\u73b0\u6570\u636e\u5e93\u7c7b\u578b\u5224\u65ad\uff1a<\/p>\n
<select id=\"selectOne\">\n    <if test=\"databaseType=1\">\n        <!-- mysql \u8bed\u53e5 -->\n    <\/if>\n    <if test=\"databaseType=2\">\n        <!-- \u8fbe\u68a6\u8bed\u53e5 -->\n    <\/if>\n<\/select><\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u0442\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f databaseidprovider\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u914d\u7f6e\u53d8\u91cf\u52a8\u6001\u5730\u6267\u884c\u4e0d\u540c\u7684 sql \u8bed\u53e5\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9\u4e0d\u540c\u6570\u636e\u5e93\u7684\u652f\u6301\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fMyBatis \u4e2d\u5982\u4f55\u5229\u7528\u6570\u636e\u5e93\u5382\u5546\u6807\u8bc6\u5b9e\u73b0\u52a8\u6001 SQL \u8bed\u53e5\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":"
\u6839\u636e\u53d8\u91cf\u503c\u6267\u884c\u52a8\u6001 sql \u8bed\u53e5 \u5728 mybatis \u4e2d\u7f16\u5199 xml \u6587\u4ef6\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6570\u636e\u5e93\u5382\u5546\u6807\u8bc6\uff08databaseidprovider\uff09\u6839\u636e\u53d8\u91cf\u503c\u6267\u884c\u4e0d\u540c\u7684 sql \u8bed\u53e5\u3002 \u4f8b\u5982\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u5168\u5c40\u914d\u7f6e\u7c7b\uff1a public class globalvariable { public int databasetype; \/\/\u6570\u636e\u5e93\u7c7b\u578b\uff0c1mysql\uff0c2\u8fbe\u68a6 } \u767b\u5f55\u540e\u590d\u5236 \u6211\u4eec\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u5728 xml \u6587\u4ef6\u4e2d\u5b9e\u73b0\u6570\u636e\u5e93\u7c7b\u578b\u5224\u65ad\uff1a <select id=”selectOne”> <if test=”databaseType=1″> <!– mysql \u8bed\u53e5 –> <\/if> <if test=”databaseType=2″> <!– \u8fbe\u68a6\u8bed\u53e5 –> <\/if> <\/select> \u767b\u5f55\u540e\u590d\u5236 \u0442\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f databaseidprovider\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u914d\u7f6e\u53d8\u91cf\u52a8\u6001\u5730\u6267\u884c\u4e0d\u540c\u7684 sql \u8bed\u53e5\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9\u4e0d\u540c\u6570\u636e\u5e93\u7684\u652f\u6301\u3002 \u4ee5\u4e0a\u5c31\u662fMyBatis \u4e2d\u5982\u4f55\u5229\u7528\u6570\u636e\u5e93\u5382\u5546\u6807\u8bc6\u5b9e\u73b0\u52a8\u6001 SQL \u8bed\u53e5\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},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7830","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7830","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=7830"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7830\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}