{"id":14257,"date":"2023-12-04T01:04:02","date_gmt":"2023-12-03T17:04:02","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=14257"},"modified":"2023-12-04T01:07:23","modified_gmt":"2023-12-03T17:07:23","slug":"mybatis-de-mapper-bian-xie-you-ji-zhong-fang-shi","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/mybatis-de-mapper-bian-xie-you-ji-zhong-fang-shi\/","title":{"rendered":"MyBatis \u7684 Mapper \u7f16\u5199\u6709\u51e0\u79cd\u65b9\u5f0f\uff1f"},"content":{"rendered":"

MyBatis \u7684 Mapper \u7f16\u5199\u65b9\u5f0f\u4e3b\u8981\u6709\u4e09\u79cd\uff1a<\/p>\n

1. XML \u6587\u4ef6\u914d\u7f6e\uff1a<\/h3>\n

\u5728 XML \u6620\u5c04\u6587\u4ef6\u4e2d\u914d\u7f6e SQL \u8bed\u53e5\u548c\u6620\u5c04\u5173\u7cfb\u3002\u8fd9\u662f\u6700\u4f20\u7edf\u7684\u65b9\u5f0f\uff0c\u5c06 SQL \u8bed\u53e5\u548c\u6620\u5c04\u5173\u7cfb\u5206\u522b\u5199\u5728 XML \u6587\u4ef6\u4e2d\u3002<\/p>\n

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

<!-- UserMapper.xml -->\n<mapper namespace=\"com.example.UserMapper\">\n    <select id=\"getUserById\" resultType=\"User\">\n        SELECT * FROM users WHERE id = #{id}\n    <\/select>\n    <!-- \u5176\u4ed6 SQL \u8bed\u53e5 -->\n<\/mapper>\n<\/code><\/pre>\n
2. \u6ce8\u89e3\u65b9\u5f0f\uff1a<\/h3>\n
\u4f7f\u7528\u6ce8\u89e3\u5728 Java \u63a5\u53e3\u65b9\u6cd5\u4e0a\u76f4\u63a5\u7f16\u5199 SQL \u67e5\u8be2\u8bed\u53e5\u548c\u6620\u5c04\u5173\u7cfb\u3002\u8fd9\u79cd\u65b9\u5f0f\u6bd4\u8f83\u7b80\u6d01\uff0cSQL \u548c Java \u65b9\u6cd5\u5728\u540c\u4e00\u4e2a\u63a5\u53e3\u6587\u4ef6\u4e2d\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
\/\/ UserMapper.java\npublic interface UserMapper {\n    @Select(\"SELECT * FROM users WHERE id = #{id}\")\n    User getUserById(@Param(\"id\") Long id);\n    \/\/ \u5176\u4ed6\u6ce8\u89e3\u65b9\u5f0f\u5b9a\u4e49\u7684 SQL \u65b9\u6cd5\n}\n<\/code><\/pre>\n
3. XML \u6587\u4ef6 + \u6ce8\u89e3\u65b9\u5f0f\uff1a<\/h3>\n
\u7ed3\u5408 XML \u6620\u5c04\u6587\u4ef6\u548c\u6ce8\u89e3\uff0c\u4f7f\u7528 XML \u5b9a\u4e49\u90e8\u5206 SQL\uff0c\u7136\u540e\u5728 Java \u63a5\u53e3\u4e2d\u4f7f\u7528\u6ce8\u89e3\u5b9a\u4e49\u5176\u4ed6 SQL \u548c\u6620\u5c04\u5173\u7cfb\u3002\u8fd9\u79cd\u65b9\u5f0f\u7075\u6d3b\u6027\u8f83\u9ad8\uff0c\u53ef\u4ee5\u6839\u636e\u9700\u8981\u9009\u62e9\u4f7f\u7528 XML \u6216\u6ce8\u89e3\u65b9\u5f0f\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
<!-- UserMapper.xml -->\n<mapper namespace=\"com.example.UserMapper\">\n    <select id=\"getUserById\" resultType=\"User\">\n        SELECT * FROM users WHERE id = #{id}\n    <\/select>\n    <!-- \u5176\u4ed6 SQL \u8bed\u53e5 -->\n<\/mapper>\n<\/code><\/pre>\n
\/\/ UserMapper.java\npublic interface UserMapper {\n    \/\/ \u6ce8\u89e3\u65b9\u5f0f\u5b9a\u4e49\u7684 SQL \u65b9\u6cd5\n    @Select(\"SELECT * FROM users WHERE name = #{name}\")\n    List<User> getUsersByName(@Param(\"name\") String name);\n    \/\/ \u5176\u4ed6\u65b9\u6cd5\n}\n<\/code><\/pre>\n
\u9009\u62e9\u4f55\u79cd\u65b9\u5f0f\u7f16\u5199 Mapper \u53d6\u51b3\u4e8e\u56e2\u961f\u548c\u4e2a\u4eba\u504f\u597d\uff0c\u4ee5\u53ca\u9879\u76ee\u7684\u9700\u6c42\u548c\u590d\u6742\u5ea6\u3002XML \u65b9\u5f0f\u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u5206\u79bb SQL \u548c Java \u4ee3\u7801\uff0c\u6ce8\u89e3\u65b9\u5f0f\u66f4\u4e3a\u7b80\u6d01\uff0c\u800c\u6df7\u5408\u65b9\u5f0f\u5219\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u7075\u6d3b\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
MyBatis \u7684 Mapper \u7f16\u5199\u65b9\u5f0f\u4e3b\u8981\u6709\u4e09\u79cd\uff1a 1. XML \u6587\u4ef6\u914d\u7f6e\uff1a \u5728 XML \u6620\u5c04\u6587\u4ef6\u4e2d\u914d\u7f6e  […]<\/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-14257","post","type-post","status-publish","format-standard","hentry","category-mybatis"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14257","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=14257"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14257\/revisions"}],"predecessor-version":[{"id":14258,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14257\/revisions\/14258"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=14257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=14257"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=14257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}