{"id":14236,"date":"2023-12-04T00:59:55","date_gmt":"2023-12-03T16:59:55","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=14236"},"modified":"2023-12-04T01:47:23","modified_gmt":"2023-12-03T17:47:23","slug":"mybatis-de-ying-she-wen-jian","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/mybatis-de-ying-she-wen-jian\/","title":{"rendered":"MyBatis \u7684\u6620\u5c04\u6587\u4ef6\uff1f"},"content":{"rendered":"

MyBatis \u7684\u6620\u5c04\u6587\u4ef6\uff08Mapper XML \u6587\u4ef6\uff09\u7528\u4e8e\u5b9a\u4e49 SQL \u8bed\u53e5\u548c Java \u5bf9\u8c61\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u5305\u62ec SQL \u67e5\u8be2\u3001\u66f4\u65b0\u3001\u5220\u9664\u7b49\u64cd\u4f5c\u3002<\/p>\n

\u8fd9\u4e9b\u6620\u5c04\u6587\u4ef6\u901a\u5e38\u5305\u542b\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n

    \n
  1. \u547d\u540d\u7a7a\u95f4\uff08Namespace\uff09\uff1a<\/strong> \u5b9a\u4e49\u4e86\u6620\u5c04\u6587\u4ef6\u4e2d SQL \u8bed\u53e5\u7684\u547d\u540d\u7a7a\u95f4\uff0c\u7528\u4e8e\u533a\u5206\u4e0d\u540c\u7684\u6620\u5c04\u6587\u4ef6\u548c\u907f\u514d\u547d\u540d\u51b2\u7a81\u3002<\/li>\n<\/ol>\n
    <!-- \u793a\u4f8b\uff1a\u5b9a\u4e49\u547d\u540d\u7a7a\u95f4 -->\n<mapper namespace=\"com.example.UserMapper\">\n    <!-- SQL \u8bed\u53e5\u5b9a\u4e49 -->\n<\/mapper>\n<\/code><\/pre>\n
      \n
    1. \u67e5\u8be2\u8bed\u53e5\u548c\u53c2\u6570\u6620\u5c04\uff1a<\/strong> \u5b9a\u4e49\u4e86 SQL \u67e5\u8be2\u8bed\u53e5\u4ee5\u53ca\u4e0e Java \u5bf9\u8c61\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/li>\n<\/ol>\n
      <!-- \u793a\u4f8b\uff1a\u67e5\u8be2\u8bed\u53e5\u548c\u53c2\u6570\u6620\u5c04 -->\n<select id=\"getUserById\" resultType=\"User\">\n    SELECT * FROM users WHERE id = #{id}\n<\/select>\n<\/code><\/pre>\n
        \n
      1. \u53c2\u6570\u4f20\u9012\uff1a<\/strong> \u901a\u8fc7 #{parameter}<\/code> \u6216 ${parameter}<\/code> \u5f62\u5f0f\u4f20\u9012\u53c2\u6570\uff0c\u7528\u4e8e\u52a8\u6001\u62fc\u63a5 SQL \u8bed\u53e5\u3002<\/p>\n<\/li>\n
      2. \n
        \u7ed3\u679c\u6620\u5c04\uff1a<\/strong> \u4f7f\u7528 resultType<\/code> \u6216 resultMap<\/code> \u6307\u5b9a\u7ed3\u679c\u6620\u5c04\u5230\u7684 Java \u5bf9\u8c61\u7c7b\u578b\uff0c\u6216\u8005\u81ea\u5b9a\u4e49\u6620\u5c04\u89c4\u5219\u3002<\/p>\n<\/li>\n<\/ol>\n
        <!-- \u793a\u4f8b\uff1a\u7ed3\u679c\u6620\u5c04 -->\n<select id=\"getUserById\" resultType=\"User\">\n    SELECT * FROM users WHERE id = #{id}\n<\/select>\n<\/code><\/pre>\n
          \n
        1. \u52a8\u6001 SQL\uff1a<\/strong> \u4f7f\u7528 <if><\/code>, <choose><\/code>, <when><\/code>, <otherwise><\/code>, <foreach><\/code> \u7b49\u6807\u7b7e\u5b9e\u73b0\u52a8\u6001 SQL\u3002<\/li>\n<\/ol>\n
          <!-- \u793a\u4f8b\uff1a\u52a8\u6001 SQL -->\n<select id=\"getUsersByCondition\" parameterType=\"map\" resultType=\"User\">\n    SELECT * FROM users\n    <where>\n        <if test=\"name != null\">\n            AND name = #{name}\n        <\/if>\n        <if test=\"age != null\">\n            AND age = #{age}\n        <\/if>\n    <\/where>\n<\/select>\n<\/code><\/pre>\n
          \u8fd9\u4e9b\u6620\u5c04\u6587\u4ef6\u5b9a\u4e49\u4e86 SQL \u8bed\u53e5\u548c Java \u5bf9\u8c61\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u662f MyBatis \u6301\u4e45\u5316\u64cd\u4f5c\u7684\u91cd\u8981\u914d\u7f6e\u6587\u4ef6\u3002\u901a\u8fc7\u6620\u5c04\u6587\u4ef6\uff0c\u53ef\u4ee5\u5c06 Java \u5bf9\u8c61\u4e0e\u6570\u636e\u5e93\u8868\u8fdb\u884c\u6620\u5c04\uff0c\u5b9e\u73b0\u6570\u636e\u7684\u589e\u5220\u6539\u67e5\u64cd\u4f5c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          MyBatis \u7684\u6620\u5c04\u6587\u4ef6\uff08Mapper XML \u6587\u4ef6\uff09\u7528\u4e8e\u5b9a\u4e49 SQL \u8bed\u53e5\u548c Java \u5bf9\u8c61\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb […]<\/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-14236","post","type-post","status-publish","format-standard","hentry","category-mybatis"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14236","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=14236"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14236\/revisions"}],"predecessor-version":[{"id":14345,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14236\/revisions\/14345"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=14236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=14236"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=14236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}