{"id":14240,"date":"2023-12-04T01:00:52","date_gmt":"2023-12-03T17:00:52","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=14240"},"modified":"2023-12-04T01:01:37","modified_gmt":"2023-12-03T17:01:37","slug":"mybatis-shi-ru-he-jiang-sql-zhi-xing-jie-guo-feng-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/mybatis-shi-ru-he-jiang-sql-zhi-xing-jie-guo-feng-2\/","title":{"rendered":"MyBatis \u662f\u5982\u4f55\u5c06 sql \u6267\u884c\u7ed3\u679c\u5c01\u88c5\u4e3a\u76ee\u6807\u5bf9\u8c61\u5e76\u8fd4\u56de\u7684\uff1f\u90fd\u6709\u54ea\u4e9b\u6620\u5c04\u5f62\u5f0f\uff1f"},"content":{"rendered":"

MyBatis \u5c06 SQL \u6267\u884c\u7ed3\u679c\u5c01\u88c5\u4e3a\u76ee\u6807\u5bf9\u8c61\u5e76\u8fd4\u56de\u7684\u8fc7\u7a0b\u4e3b\u8981\u4f9d\u9760 ResultMap \u8fdb\u884c\u5bf9\u8c61\u4e0e\u6570\u636e\u5e93\u5217\u7684\u6620\u5c04\u5173\u7cfb\u914d\u7f6e\uff0c\u4ee5\u53ca TypeHandler \u8fdb\u884c Java \u7c7b\u578b\u548c\u6570\u636e\u5e93\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362\u3002\u4e3b\u8981\u7684\u6620\u5c04\u5f62\u5f0f\u6709\uff1a<\/p>\n

1. \u4f7f\u7528 ResultMap \u8fdb\u884c\u5bf9\u8c61\u6620\u5c04\uff1a<\/h3>\n

\u901a\u8fc7 ResultMap \u6620\u5c04\u67e5\u8be2\u7ed3\u679c\u5230 Java \u5bf9\u8c61\uff0c\u5b9a\u4e49\u4e86\u67e5\u8be2\u7ed3\u679c\u96c6\u4e2d\u5217\u4e0e Java \u5bf9\u8c61\u5c5e\u6027\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n

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

<!-- XML \u6620\u5c04\u6587\u4ef6\u4e2d\u914d\u7f6e ResultMap -->\n<resultMap id=\"userResultMap\" type=\"User\">\n    <id property=\"id\" column=\"user_id\"\/>\n    <result property=\"username\" column=\"user_name\"\/>\n    <!-- \u5176\u4ed6\u6620\u5c04\u5173\u7cfb -->\n<\/resultMap>\n<\/code><\/pre>\n
2. \u4f7f\u7528\u6ce8\u89e3 @Result \u8fdb\u884c\u5bf9\u8c61\u6620\u5c04\uff1a<\/h3>\n
\u901a\u8fc7\u6ce8\u89e3\u65b9\u5f0f\u8fdb\u884c\u6620\u5c04\uff0c\u53ef\u4ee5\u76f4\u63a5\u5728\u67e5\u8be2\u65b9\u6cd5\u4e0a\u4f7f\u7528 @Result \u5b9a\u4e49\u67e5\u8be2\u7ed3\u679c\u548c\u5bf9\u8c61\u5c5e\u6027\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
@Results({\n    @Result(property = \"id\", column = \"user_id\"),\n    @Result(property = \"username\", column = \"user_name\"),\n    \/\/ \u5176\u4ed6\u6620\u5c04\u5173\u7cfb\n})\n<\/code><\/pre>\n
3. \u9ed8\u8ba4\u6620\u5c04\u89c4\u5219\uff1a<\/h3>\n
\u5f53 ResultMap \u6216 @Result \u672a\u914d\u7f6e\u6620\u5c04\u5173\u7cfb\u65f6\uff0cMyBatis \u4f7f\u7528\u9ed8\u8ba4\u89c4\u5219\u8fdb\u884c\u6620\u5c04\uff0c\u4f8b\u5982\u6309\u7167\u5217\u540d\u548c\u5c5e\u6027\u540d\u7684\u5339\u914d\u89c4\u5219\u8fdb\u884c\u81ea\u52a8\u6620\u5c04\u3002<\/p>\n
4. \u4f7f\u7528 TypeHandler \u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\uff1a<\/h3>\n
TypeHandler \u7528\u4e8e\u5904\u7406\u6570\u636e\u5e93\u5b57\u6bb5\u548c Java \u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362\uff0c\u4f8b\u5982\u5c06\u6570\u636e\u5e93\u4e2d\u7684\u65e5\u671f\u7c7b\u578b\u6620\u5c04\u5230 Java \u7684 Date \u7c7b\u578b\uff0c\u6216\u8005\u5c06\u6570\u636e\u5e93\u4e2d\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\u6620\u5c04\u5230\u679a\u4e3e\u7c7b\u578b\u7b49\u3002<\/p>\n
\u901a\u8fc7\u8fd9\u4e9b\u6620\u5c04\u5f62\u5f0f\uff0cMyBatis \u5c06\u67e5\u8be2\u7ed3\u679c\u96c6\u4e2d\u7684\u6570\u636e\u6309\u7167\u914d\u7f6e\u7684\u6620\u5c04\u5173\u7cfb\u8f6c\u5316\u4e3a\u5bf9\u5e94\u7684 Java \u5bf9\u8c61\uff0c\u5e76\u8fd4\u56de\u7ed9\u8c03\u7528\u65b9\u3002\u5728\u914d\u7f6e\u6620\u5c04\u65f6\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u9009\u62e9\u5408\u9002\u7684\u65b9\u5f0f\u8fdb\u884c\u5bf9\u8c61\u548c\u6570\u636e\u5e93\u5217\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\u5b9a\u4e49\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u540c\u7684\u4e1a\u52a1\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
MyBatis \u5c06 SQL \u6267\u884c\u7ed3\u679c\u5c01\u88c5\u4e3a\u76ee\u6807\u5bf9\u8c61\u5e76\u8fd4\u56de\u7684\u8fc7\u7a0b\u4e3b\u8981\u4f9d\u9760 ResultMap \u8fdb\u884c\u5bf9\u8c61\u4e0e\u6570\u636e\u5e93\u5217 […]<\/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-14240","post","type-post","status-publish","format-standard","hentry","category-mybatis"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14240","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=14240"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14240\/revisions"}],"predecessor-version":[{"id":14241,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14240\/revisions\/14241"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=14240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=14240"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=14240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}