{"id":14298,"date":"2023-12-04T01:20:30","date_gmt":"2023-12-03T17:20:30","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=14298"},"modified":"2023-12-04T01:21:18","modified_gmt":"2023-12-03T17:21:18","slug":"mybatis-de-jie-kou-bang-ding-you-na-xie-shi-xian-f-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/mybatis-de-jie-kou-bang-ding-you-na-xie-shi-xian-f-2\/","title":{"rendered":"MyBatis \u7684\u63a5\u53e3\u7ed1\u5b9a\uff1f\u6709\u54ea\u4e9b\u5b9e\u73b0\u65b9\u5f0f\uff1f"},"content":{"rendered":"<p>MyBatis \u7684\u63a5\u53e3\u7ed1\u5b9a\u662f\u6307\u5c06\u63a5\u53e3\u4e0e XML \u6620\u5c04\u6587\u4ef6\u6216\u6ce8\u89e3\u8fdb\u884c\u7ed1\u5b9a\uff0c\u4ee5\u4fbf\u4f7f\u7528\u63a5\u53e3\u6765\u64cd\u4f5c\u6570\u636e\u5e93\u3002\u6709\u591a\u79cd\u65b9\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u63a5\u53e3\u7ed1\u5b9a\uff1a<\/p>\n<h3>1. XML \u6620\u5c04\u6587\u4ef6\u7ed1\u5b9a\uff1a<\/h3>\n<p>\u901a\u8fc7 XML \u6620\u5c04\u6587\u4ef6\u914d\u7f6e\u4e0e\u63a5\u53e3\u65b9\u6cd5\u76f8\u5bf9\u5e94\u7684 SQL \u8bed\u53e5\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre data-language=XML><code class=\"language-markup  line-numbers\">&lt;!-- UserMapper.xml --&gt;\n&lt;mapper namespace=\"com.example.UserMapper\"&gt;\n    &lt;select id=\"getUserById\" resultType=\"User\"&gt;\n        SELECT * FROM users WHERE id = #{id}\n    &lt;\/select&gt;\n&lt;\/mapper&gt;\n<\/code><\/pre>\n<h3>2. \u6ce8\u89e3\u7ed1\u5b9a\uff1a<\/h3>\n<p>\u901a\u8fc7\u6ce8\u89e3\u65b9\u5f0f\uff0c\u76f4\u63a5\u5728\u63a5\u53e3\u65b9\u6cd5\u4e0a\u7f16\u5199 SQL \u8bed\u53e5\uff0c\u7701\u53bb XML \u6620\u5c04\u6587\u4ef6\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre><code class=\"language-java  line-numbers\">\/\/ UserMapper.java\npublic interface UserMapper {\n    @Select(\"SELECT * FROM users WHERE id = #{id}\")\n    User getUserById(int id);\n}\n<\/code><\/pre>\n<h3>3. \u4f7f\u7528\u52a8\u6001 SQL\uff1a<\/h3>\n<p>\u52a8\u6001 SQL \u53ef\u4ee5\u6839\u636e\u6761\u4ef6\u62fc\u63a5 SQL\uff0c\u63d0\u9ad8\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u7ed3\u5408\u6ce8\u89e3\u6216 XML \u6620\u5c04\u6587\u4ef6\u4f7f\u7528\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre><code class=\"language-java  line-numbers\">\/\/ UserMapper.java\npublic interface UserMapper {\n    @Select(\"&lt;script&gt;\" +\n            \"SELECT * FROM users \" +\n            \"&lt;where&gt; \" +\n            \"&lt;if test='id != null'&gt;AND id = #{id}&lt;\/if&gt; \" +\n            \"&lt;\/where&gt;\" +\n            \"&lt;\/script&gt;\")\n    User getUserById(Integer id);\n}\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u662f\u51e0\u79cd\u5e38\u89c1\u7684 MyBatis \u63a5\u53e3\u7ed1\u5b9a\u65b9\u5f0f\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u9879\u76ee\u9700\u6c42\u548c\u4e2a\u4eba\u559c\u597d\u9009\u62e9\u5408\u9002\u7684\u65b9\u5f0f\u3002 XML \u6620\u5c04\u6587\u4ef6\u66f4\u9002\u5408\u590d\u6742\u7684 SQL \u8bed\u53e5\u7ec4\u7ec7\u548c\u7ba1\u7406\uff0c\u800c\u6ce8\u89e3\u65b9\u5f0f\u66f4\u76f4\u89c2\u7b80\u6d01\uff0c\u9002\u5408\u7b80\u5355\u7684 SQL \u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MyBatis \u7684\u63a5\u53e3\u7ed1\u5b9a\u662f\u6307\u5c06\u63a5\u53e3\u4e0e XML \u6620\u5c04\u6587\u4ef6\u6216\u6ce8\u89e3\u8fdb\u884c\u7ed1\u5b9a\uff0c\u4ee5\u4fbf\u4f7f\u7528\u63a5\u53e3\u6765\u64cd\u4f5c\u6570\u636e\u5e93\u3002\u6709\u591a\u79cd\u65b9\u5f0f\u53ef [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113],"tags":[],"class_list":["post-14298","post","type-post","status-publish","format-standard","hentry","category-mybatis"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=14298"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14298\/revisions"}],"predecessor-version":[{"id":14299,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14298\/revisions\/14299"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=14298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=14298"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=14298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}