{"id":409,"date":"2020-12-06T01:02:08","date_gmt":"2020-12-05T17:02:08","guid":{"rendered":"http:\/\/moyisuiying.com\/?p=409"},"modified":"2020-12-10T14:23:36","modified_gmt":"2020-12-10T06:23:36","slug":"mybatis-plus%e5%ad%a6%e4%b9%a0%ef%bc%88%e5%9b%9b%ef%bc%89-mybatiplus%e7%9a%84wrapper%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"http:\/\/moyisuiying.com\/index.php\/mybatis\/409.html","title":{"rendered":"Mybatis-plus\u5b66\u4e60\uff08\u56db\uff09\u2014\u2014MybatiPlus\u7684Wrapper\u7684\u4f7f\u7528"},"content":{"rendered":"\n<h2>4Wrapper\u7684\u4f7f\u7528<\/h2>\n\n\n\n<h3>4.1Wrapper\u7684\u7c7b\u56fe\u4f53\u7cfb<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201206005909661.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"[\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20(img-e5cs43aj-1607187310991)(E:\\\u65b0\u6280\u672f\u5b66\u4e60\\java_study\\mybatis-plus\u5b66\u4e60\\images\\1470521-20200408175328100-117288012.png)]\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201206005909661.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" alt=\"[\u5916\u94fe\u56fe\u7247\u8f6c\u5b58\u5931\u8d25,\u6e90\u7ad9\u53ef\u80fd\u6709\u9632\u76d7\u94fe\u673a\u5236,\u5efa\u8bae\u5c06\u56fe\u7247\u4fdd\u5b58\u4e0b\u6765\u76f4\u63a5\u4e0a\u4f20(img-e5cs43aj-1607187310991)(E:\\\u65b0\u6280\u672f\u5b66\u4e60\\java_study\\mybatis-plus\u5b66\u4e60\\images\\1470521-20200408175328100-117288012.png)]\"\/><\/figure><\/noscript>\n\n\n\n<h3>4.2wapper\u4ecb\u7ecd<\/h3>\n\n\n\n<ul><li>Wrapper \uff1a \u6761\u4ef6\u6784\u9020\u62bd\u8c61\u7c7b\uff0c\u6700\u9876\u7aef\u7236\u7c7b\uff0c\u62bd\u8c61\u7c7b\u4e2d\u63d0\u4f9b4\u4e2a\u65b9\u6cd5\u897f\u9762\u8d34\u6e90\u7801\u5c55\u793a<\/li><li>AbstractWrapper \uff1a \u7528\u4e8e\u67e5\u8be2\u6761\u4ef6\u5c01\u88c5\uff0c\u751f\u6210 sql \u7684 where \u6761\u4ef6<\/li><li>AbstractLambdaWrapper \uff1a Lambda \u8bed\u6cd5\u4f7f\u7528 Wrapper\u7edf\u4e00\u5904\u7406\u89e3\u6790 lambda \u83b7\u53d6 column\u3002<\/li><li>LambdaQueryWrapper \uff1a\u770b\u540d\u79f0\u4e5f\u80fd\u660e\u767d\u5c31\u662f\u7528\u4e8eLambda\u8bed\u6cd5\u4f7f\u7528\u7684\u67e5\u8be2Wrapper<\/li><li>LambdaUpdateWrapper \uff1a Lambda \u66f4\u65b0\u5c01\u88c5Wrapper<\/li><li>QueryWrapper \uff1a Entity \u5bf9\u8c61\u5c01\u88c5\u64cd\u4f5c\u7c7b\uff0c\u4e0d\u662f\u7528lambda\u8bed\u6cd5<\/li><li>UpdateWrapper \uff1a Update \u6761\u4ef6\u5c01\u88c5\uff0c\u7528\u4e8eEntity\u5bf9\u8c61\u66f4\u65b0\u64cd\u4f5c<\/li><\/ul>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>QueryWrapper(LambdaQueryWrapper) \u548c UpdateWrapper(LambdaUpdateWrapper) \u7684\u7236\u7c7b<br>\u7528\u4e8e\u751f\u6210 sql \u7684 where \u6761\u4ef6, entity \u5c5e\u6027\u4e5f\u7528\u4e8e\u751f\u6210 sql \u7684 where \u6761\u4ef6<br>\u6ce8\u610f: entity \u751f\u6210\u7684 where \u6761\u4ef6\u4e0e \u4f7f\u7528\u5404\u4e2a api \u751f\u6210\u7684 where \u6761\u4ef6<strong>\u6ca1\u6709\u4efb\u4f55\u5173\u8054\u884c\u4e3a<\/strong><\/p><\/blockquote>\n\n\n\n<h3>4.3\u5e38\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201206005655325.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201206005655325.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70#pic_center\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n\n\n\n<h3>4.4\u65b9\u6cd5\u8be6\u60c5\uff1a<a href=\"https:\/\/baomidou.com\/guide\/wrapper.html#abstractwrapper\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/baomidou.com\/guide\/wrapper.html#abstractwrapper<\/a><\/h3>\n\n\n\n<h3>4.5\u6d4b\u8bd5\u67e5\u8be2<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@Test\n    public void testGetOneByWrapper(){\n        QueryWrapper&lt;Account> queryWrapper = new QueryWrapper&lt;>();\n        Map&lt;String,Object> map = new HashMap&lt;>();\n        map.put(\"password\",\"b\");\n        map.put(\"name\",null);\n        queryWrapper.allEq(map, false);\n        Account account = accountService.getOne(queryWrapper);\n        System.out.println(account);\n    }<\/code><\/pre>\n\n\n\n<h3>4.6\u6d4b\u8bd5\u66f4\u65b0<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@Test\n    public void testUpDateByWrapper(){\n        Account account = new Account(null,\"b\",\"bb\");\n        UpdateWrapper&lt;Account> updateWrapper = new UpdateWrapper&lt;>();\n        updateWrapper.eq(\"id\",19);\n        accountService.update(account,updateWrapper);\n    }<\/code><\/pre>\n\n\n\n<h3>4.7\u6d4b\u8bd5\u7684\u6e90\u4ee3\u7801\u5df2\u4e0a\u4f20\u5230GitHub\u4e2d\uff1a<a href=\"https:\/\/github.com\/LJF2402901363\/java_study.git\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/github.com\/LJF2402901363\/java_study.git<\/a><\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201206005749823.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/moezx\/cdn@3.0.2\/img\/svg\/loader\/trans.ajax-spinner-preloader.svg\" onerror=\"imgError(this)\"  alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure >\n<noscript><img src=\"https:\/\/img-blog.csdnimg.cn\/20201206005749823.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE4NzAwMjI=,size_16,color_FFFFFF,t_70\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"\/><\/figure><\/noscript>\n","protected":false},"excerpt":{"rendered":"<p>4Wrapper\u7684\u4f7f\u7528 4.1Wrapper\u7684\u7c7b\u56fe\u4f53\u7cfb 4.2wapper\u4ecb\u7ecd Wrapper \uff1a \u6761\u4ef6\u6784\u9020\u62bd\u8c61\u7c7b\uff0c\u6700\u9876\u7aef\u7236\u7c7b\uff0c\u62bd &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[149,155],"_links":{"self":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/409"}],"collection":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/comments?post=409"}],"version-history":[{"count":1,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/409\/revisions"}],"predecessor-version":[{"id":410,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/409\/revisions\/410"}],"wp:attachment":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/media?parent=409"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/categories?post=409"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/tags?post=409"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}