{"id":1020,"date":"2022-08-17T15:00:26","date_gmt":"2022-08-17T07:00:26","guid":{"rendered":"https:\/\/usei.cn\/?p=1020"},"modified":"2023-04-03T09:38:23","modified_gmt":"2023-04-03T01:38:23","slug":"mybatis-%e4%bc%a0%e5%8f%82%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/usei.cn\/index.php\/2022\/08\/17\/mybatis-%e4%bc%a0%e5%8f%82%e6%96%b9%e5%bc%8f\/","title":{"rendered":"Mybatis \u4f20\u53c2\u65b9\u5f0f"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">\u5355\u4e2a\u53c2\u6570<\/h3>\n\n\n\n<p>\u5355\u4e2a\u53c2\u6570\u7684\u4f20\u53c2\u6bd4\u8f83\u7b80\u5355\uff0c\u53ef\u4ee5\u662f\u4efb\u610f\u5f62\u5f0f\u7684\uff0c\u6bd4\u5982#{a}\u3001#{b}\u6216\u8005#{param1}\uff0c\u4f46\u662f\u4e3a\u4e86\u5f00\u53d1\u89c4\u8303\uff0c\u5c3d\u91cf\u4f7f\u7528\u548c\u5165\u53c2\u65f6\u4e00\u6837\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UserInfo selectByUserId(String userId);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectByUserId\" resultType=\"cn.cb.demo.domain.UserInfo\">\n        select * from user_info where user_id=#{userId} and status=1\n&lt;\/select><\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u4e2a\u53c2\u6570-\u7d22\u5f15\u3010\u4e0d\u63a8\u8350\u3011<\/h3>\n\n\n\n<p>\u591a\u4e2a\u53c2\u6570\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u4e8e\u7d22\u5f15\u7684\u65b9\u5f0f\u4f20\u503c\uff0c\u6bd4\u5982#{param1}\u5bf9\u5e94\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c#{param2}\u5bf9\u5e94\u7b2c\u4e8c\u4e2a\u53c2\u6570<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UserInfo selectByUserIdAndStatus(String userId,Integer status);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectByUserIdAndStatus\" resultType=\"cn.cb.demo.domain.UserInfo\">\n        select * from user_info where user_id=#{param1} and status=#{param2}\n&lt;\/select<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u4e2a\u53c2\u6570-@Param<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>UserInfo selectByUserIdAndStatus(@Param(\"userId\") String userId,@Param(\"status\") Integer status);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectByUserIdAndStatus\" resultType=\"cn.cb.demo.domain.UserInfo\">\n        select * from user_info where user_id=#{userId} and status=#{status}\n&lt;\/select><\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u4e2a\u53c2\u6570-Map<\/h3>\n\n\n\n<p>Mybatis\u5e95\u5c42\u5c31\u662f\u5c06\u5165\u53c2\u8f6c\u6362\u6210Map\uff0c\u5165\u53c2\u4f20Map\u5f53\u7136\u4e5f\u884c\uff0c\u6b64\u65f6#{key}\u4e2d\u7684key\u5c31\u5bf9\u5e94Map\u4e2d\u7684key\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UserInfo selectByUserIdAndStatusMap(Map&lt;String,Object> map);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectByUserIdAndStatusMap\" resultType=\"cn.cb.demo.domain.UserInfo\">\n        select * from user_info where user_id=#{userId} and status=#{status}\n&lt;\/select><\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u4e2a\u53c2\u6570-POJO\u3010\u63a8\u8350\u3011<\/h3>\n\n\n\n<p>\u591a\u4e2a\u53c2\u6570\u53ef\u4ee5\u4f7f\u7528\u5b9e\u4f53\u7c7b\u5c01\u88c5\uff0c\u6b64\u65f6\u5bf9\u5e94\u7684key\u5c31\u662f\u5c5e\u6027\u540d\u79f0\uff0c\u6ce8\u610f\u4e00\u5b9a\u8981\u6709get\u65b9\u6cd5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UserInfo selectByEntity(UserInfoReq userInfoReq);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectByEntity\" resultType=\"cn.cb.demo.domain.UserInfo\">\n        select * from user_info where user_id=#{userId} and status=#{status}\n&lt;\/select>\r<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u4e2a\u53c2\u6570-List\u4f20\u53c2<\/h3>\n\n\n\n<p>List\u4f20\u53c2\u4e5f\u662f\u6bd4\u8f83\u5e38\u89c1\u7684\uff0c\u901a\u5e38\u662fSQL\u4e2d\u7684in\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>List&lt;UserInfo> selectList( List&lt;String> userIds);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectList\" resultMap=\"userResultMap\">\n        select * from user_info where status=1\n        and user_id in\n        &lt;foreach collection=\"list\" item=\"item\" open=\"(\" separator=\",\" close=\")\" >\n            #{item}\n        &lt;\/foreach>\n&lt;\/select><\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u591a\u4e2a\u53c2\u6570-\u6570\u7ec4\u4f20\u53c2<\/h3>\n\n\n\n<p>\u8fd9\u79cd\u65b9\u5f0f\u7c7b\u4f3cList\u4f20\u53c2\uff0c\u4f9d\u65e7\u4f7f\u7528foreach\u8bed\u6cd5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>List&lt;UserInfo> selectList( String&#91;] userIds);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectList\" resultMap=\"userResultMap\">\n    select * from user_info where status=1\n    and user_id in\n        &lt;foreach collection=\"array\" item=\"item\" open=\"(\" separator=\",\" close=\")\" >\n            #{item}\n        &lt;\/foreach>\n&lt;\/select><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5355\u4e2a\u53c2\u6570 \u5355\u4e2a\u53c2\u6570\u7684\u4f20\u53c2\u6bd4\u8f83\u7b80\u5355\uff0c\u53ef\u4ee5\u662f\u4efb\u610f\u5f62\u5f0f\u7684\uff0c\u6bd4\u5982#{a}\u3001#{b}\u6216\u8005#{param1}\uff0c\u4f46\u662f\u4e3a\u4e86\u5f00\u53d1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,82],"tags":[],"class_list":["post-1020","post","type-post","status-publish","format-standard","hentry","category-java","category-mybatis"],"_links":{"self":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1020","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1020"}],"version-history":[{"count":7,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1020\/revisions"}],"predecessor-version":[{"id":1027,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1020\/revisions\/1027"}],"wp:attachment":[{"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/usei.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}