{"id":3371,"date":"2024-03-13T06:53:10","date_gmt":"2024-03-13T06:53:10","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-an-in-clause-with-a-list-in-mybatis\/"},"modified":"2025-07-30T15:16:23","modified_gmt":"2025-07-30T15:16:23","slug":"how-to-use-an-in-clause-with-a-list-in-mybatis","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-an-in-clause-with-a-list-in-mybatis\/","title":{"rendered":"MyBatis IN Clause with List: foreach Guide"},"content":{"rendered":"<p>Using the &#8220;in&#8221; clause with a List in MyBatis can be achieved by using the foreach tag in dynamic SQL. Below is a simple example:<\/p>\n<p>Suppose there is a User class and a UserMapper interface that need to retrieve user information based on a list of user IDs.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title class_\">UserMapper<\/span> {\r\n    List&lt;User&gt; <span class=\"hljs-title function_\">selectUsersByIdList<\/span><span class=\"hljs-params\">(<span class=\"hljs-meta\">@Param(\"idList\")<\/span> List&lt;Integer&gt; idList)<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>You can use the foreach tag in the corresponding UserMapper.xml file to achieve this.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">select<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\">\"selectUsersByIdList\"<\/span> <span class=\"hljs-attr\">resultType<\/span>=<span class=\"hljs-string\">\"User\"<\/span>&gt;<\/span>\r\n    SELECT * FROM user WHERE id IN\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">foreach<\/span> <span class=\"hljs-attr\">collection<\/span>=<span class=\"hljs-string\">\"idList\"<\/span> <span class=\"hljs-attr\">item<\/span>=<span class=\"hljs-string\">\"id\"<\/span> <span class=\"hljs-attr\">open<\/span>=<span class=\"hljs-string\">\"(\"<\/span> <span class=\"hljs-attr\">separator<\/span>=<span class=\"hljs-string\">\",\"<\/span> <span class=\"hljs-attr\">close<\/span>=<span class=\"hljs-string\">\")\"<\/span>&gt;<\/span>\r\n        #{id}\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">foreach<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">select<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<p>In this example, idList is a passed List<Integer>, the foreach tag will iterate through each element in idList and concatenate it to the IN condition in the SQL statement.<\/p>\n<p>Example of usage:<\/p>\n<pre class=\"post-pre\"><code>List&lt;Integer&gt; idList = Arrays.asList(<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>);\r\nList&lt;User&gt; users = userMapper.selectUsersByIdList(idList);\r\n<\/code><\/pre>\n<p>This allows you to query user information by passing in a List through &#8220;in&#8221;.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using the &#8220;in&#8221; clause with a List in MyBatis can be achieved by using the foreach tag in dynamic SQL. Below is a simple example: Suppose there is a User class and a UserMapper interface that need to retrieve user information based on a list of user IDs. public interface UserMapper { List&lt;User&gt; selectUsersByIdList(@Param(&#8220;idList&#8221;) List&lt;Integer&gt; [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[1467,1466,1465,87,1459],"class_list":["post-3371","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-dynamic-sql","tag-foreach-tag","tag-in-clause","tag-java","tag-mybatis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MyBatis IN Clause with List: foreach Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use IN clause with Lists in MyBatis using foreach tag. 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