{"id":406,"date":"2020-12-06T00:48:14","date_gmt":"2020-12-05T16:48:14","guid":{"rendered":"http:\/\/moyisuiying.com\/?p=406"},"modified":"2020-12-10T14:23:35","modified_gmt":"2020-12-10T06:23:35","slug":"mybatis-plus%e5%ad%a6%e4%b9%a0%ef%bc%88%e4%b8%89%ef%bc%89-mybatiplus%e7%9a%84%e5%88%86%e9%a1%b5%e6%8f%92%e4%bb%b6paginationinnerinterceptor%e8%af%a6%e8%a7%a3%e4%bb%a5%e5%8f%8a","status":"publish","type":"post","link":"http:\/\/moyisuiying.com\/index.php\/mybatis\/406.html","title":{"rendered":"Mybatis-plus\u5b66\u4e60\uff08\u4e09\uff09\u2014\u2014MybatiPlus\u7684\u5206\u9875\u63d2\u4ef6PaginationInnerInterceptor\u8be6\u89e3\u4ee5\u53ca\u6d4b\u8bd5"},"content":{"rendered":"\n<h2>3.\u5206\u9875\u63d2\u4ef6(PaginationInnerInterceptor)<\/h2>\n\n\n\n<h3>3.1\u5c5e\u6027\u4ecb\u7ecd<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5c5e\u6027\u540d<\/th><th>\u7c7b\u578b<\/th><th>\u9ed8\u8ba4\u503c<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>overflow<\/td><td>boolean<\/td><td>false<\/td><td>\u6ea2\u51fa\u603b\u9875\u6570\u540e\u662f\u5426\u8fdb\u884c\u5904\u7406(\u9ed8\u8ba4\u4e0d\u5904\u7406,\u53c2\u89c1 <code>\u63d2\u4ef6#continuePage<\/code> \u65b9\u6cd5)<\/td><\/tr><tr><td>maxLimit<\/td><td>Long<\/td><td><\/td><td>\u5355\u9875\u5206\u9875\u6761\u6570\u9650\u5236(\u9ed8\u8ba4\u65e0\u9650\u5236,\u53c2\u89c1 <code>\u63d2\u4ef6#handlerLimit<\/code> \u65b9\u6cd5)<\/td><\/tr><tr><td>dbType<\/td><td>DbType<\/td><td><\/td><td>\u6570\u636e\u5e93\u7c7b\u578b(\u6839\u636e\u7c7b\u578b\u83b7\u53d6\u5e94\u4f7f\u7528\u7684\u5206\u9875\u65b9\u8a00,\u53c2\u89c1 <code>\u63d2\u4ef6#findIDialect<\/code> \u65b9\u6cd5)<\/td><\/tr><tr><td>dialect<\/td><td>IDialect<\/td><td><\/td><td>\u65b9\u8a00\u5b9e\u73b0\u7c7b(\u53c2\u89c1 <code>\u63d2\u4ef6#findIDialect<\/code> \u65b9\u6cd5)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u5efa\u8bae\u5355\u4e00\u6570\u636e\u5e93\u7c7b\u578b\u7684\u5747\u8bbe\u7f6e dbType<\/p><\/blockquote>\n\n\n\n<h3>3.2\u81ea\u5b9a\u4e49\u7684 mapper#method \u4f7f\u7528\u5206\u9875<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>IPage&lt;User> selectPageVo(IPage&lt;?> page, Integer state);\n\/\/ or\nList&lt;User> selectPageVo(IPage&lt;User> page, Integer state);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;select id=\"selectPageVo\" resultType=\"com.baomidou.cloud.entity.UserVo\">\n    SELECT id,name FROM user WHERE state=#{state}\n&lt;\/select><\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>\u5982\u679c\u8fd4\u56de\u7c7b\u578b\u662f IPage \u5219\u5165\u53c2\u7684 IPage \u4e0d\u80fd\u4e3anull,\u56e0\u4e3a \u8fd4\u56de\u7684IPage == \u5165\u53c2\u7684IPage<br>\u5982\u679c\u8fd4\u56de\u7c7b\u578b\u662f List \u5219\u5165\u53c2\u7684 IPage \u53ef\u4ee5\u4e3a null(\u4e3a null \u5219\u4e0d\u5206\u9875),\u4f46\u9700\u8981\u4f60\u624b\u52a8 \u5165\u53c2\u7684IPage.setRecords(\u8fd4\u56de\u7684 List);\u5982\u679c xml \u9700\u8981\u4ece page \u91cc\u53d6\u503c,\u9700\u8981 <code>page.\u5c5e\u6027<\/code> \u83b7\u53d6<\/p><\/blockquote>\n\n\n\n<h3>3.3config.java\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/Spring boot\u65b9\u5f0f\n@Configuration\n@MapperScan(\"com.baomidou.cloud.service.*.mapper*\")\npublic class MybatisPlusConfig {\n\n    @Bean\n    public PaginationInterceptor paginationInterceptor() {\n        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();\n        \/\/ \u8bbe\u7f6e\u8bf7\u6c42\u7684\u9875\u9762\u5927\u4e8e\u6700\u5927\u9875\u540e\u64cd\u4f5c\uff0c true\u8c03\u56de\u5230\u9996\u9875\uff0cfalse \u7ee7\u7eed\u8bf7\u6c42  \u9ed8\u8ba4false\n        \/\/ paginationInterceptor.setOverflow(false);\n        \/\/ \u8bbe\u7f6e\u6700\u5927\u5355\u9875\u9650\u5236\u6570\u91cf\uff0c\u9ed8\u8ba4 500 \u6761\uff0c-1 \u4e0d\u53d7\u9650\u5236\n        \/\/ paginationInterceptor.setLimit(500);\n        \/\/ \u5f00\u542f count \u7684 join \u4f18\u5316,\u53ea\u9488\u5bf9\u90e8\u5206 left join\n        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));\n        return paginationInterceptor;\n    }\n}<\/code><\/pre>\n\n\n\n<h3>3.4\u5206\u9875\u51fd\u6570<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n     * \u6839\u636e entity \u6761\u4ef6\uff0c\u67e5\u8be2\u5168\u90e8\u8bb0\u5f55\uff08\u5e76\u7ffb\u9875\uff09\n     *\n     * @param page         \u5206\u9875\u67e5\u8be2\u6761\u4ef6\uff08\u53ef\u4ee5\u4e3a RowBounds.DEFAULT\uff09\n     * @param queryWrapper \u5b9e\u4f53\u5bf9\u8c61\u5c01\u88c5\u64cd\u4f5c\u7c7b\uff08\u53ef\u4ee5\u4e3a null\uff09\uff0c\u7528\u4e8e\u4f5c\u4e3a\u67e5\u8be2\u6761\u4ef6\uff0c\u4e3anull\u65f6\u9ed8\u8ba4\u67e5\u8be2\u6240\u6709\u8bb0\u5f55\u3002\n     *\/\n    &lt;E extends IPage&lt;T>> E selectPage(E page, @Param(Constants.WRAPPER) Wrapper&lt;T> queryWrapper);<\/code><\/pre>\n\n\n\n<h3>3.5\u8fdb\u884c\u6d4b\u8bd5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>  @Test\n    public  void testPage(){\n        \/\/\u8bbe\u7f6e\u5206\u9875\u7684\u6761\u4ef6\uff0c\u4ece\u7b2c2\u7684\u5f00\u59cb\u67e5\u8be25\u6761\u8bb0\u5f55\n        Page&lt;Account> page = new Page&lt;>(2,5);\n        \/\/\u5206\u9875\uff0c\u9ed8\u8ba4\u67e5\u8be2\u6240\u6709\u7684\u8bb0\u5f55\n        Page&lt;Account> accountPage = accountDao.selectPage(page, null);\n        accountPage.getRecords().forEach(System.out::println);\n\n    }<\/code><\/pre>\n\n\n<h3>3.6\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<p><!-- \/wp:heading --><\/p>\n<p><!-- wp:image --><\/p>\n<figure class=\"wp-block-image\"><img   class=\"lazyload\" data-src=\"https:\/\/img-blog.csdnimg.cn\/20201205181629733.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\/20201205181629733.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>","protected":false},"excerpt":{"rendered":"<p>3.\u5206\u9875\u63d2\u4ef6(PaginationInnerInterceptor) 3.1\u5c5e\u6027\u4ecb\u7ecd \u5c5e\u6027\u540d\u7c7b\u578b\u9ed8\u8ba4\u503c\u63cf\u8ff0overflowbool &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[154,152,47],"_links":{"self":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/406"}],"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=406"}],"version-history":[{"count":2,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/406\/revisions"}],"predecessor-version":[{"id":408,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/posts\/406\/revisions\/408"}],"wp:attachment":[{"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/media?parent=406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/categories?post=406"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/moyisuiying.com\/index.php\/wp-json\/wp\/v2\/tags?post=406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}