{"id":18619,"date":"2024-03-15T17:20:38","date_gmt":"2024-03-15T17:20:38","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/"},"modified":"2024-03-21T13:44:28","modified_gmt":"2024-03-21T13:44:28","slug":"how-can-spring-boot-implement-pagination-for-data-querying","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/","title":{"rendered":"How can Spring Boot implement pagination for data querying?"},"content":{"rendered":"<p>\u5728SpringBoot\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528Spring Data JPA\u63d0\u4f9b\u7684PagingAndSortingRepository\u63a5\u53e3\u6765\u5b9e\u73b0\u5206\u9875\u67e5\u8be2\u3002<\/p>\n<p>Firstly, extend the PagingAndSortingRepository interface in your Repository interface and specify the entity class and primary key type. For example, if you want to perform pagination queries on an entity called User, you can create a UserRepository interface like the following:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Repository<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title class_\">UserRepository<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">PagingAndSortingRepository<\/span>&lt;User, Long&gt; {\r\n}\r\n<\/code><\/pre>\n<p>Next, inject UserRepository into your Service class and use the Pageable interface to specify pagination parameters. Pageable interface has many implementation classes, with the most commonly used being PageRequest class. You can create a PageRequest object, specifying the page number, number of items per page, and sorting criteria.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@Service<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserService<\/span> {\r\n    <span class=\"hljs-meta\">@Autowired<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> UserRepository userRepository;\r\n    \r\n    <span class=\"hljs-keyword\">public<\/span> Page&lt;User&gt; <span class=\"hljs-title function_\">getUsers<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">int<\/span> pageNo, <span class=\"hljs-type\">int<\/span> pageSize, String sortBy)<\/span> {\r\n        <span class=\"hljs-type\">Pageable<\/span> <span class=\"hljs-variable\">pageable<\/span> <span class=\"hljs-operator\">=<\/span> PageRequest.of(pageNo, pageSize, Sort.by(sortBy));\r\n        <span class=\"hljs-keyword\">return<\/span> userRepository.findAll(pageable);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>The getUsers method in the above code takes three parameters: pageNo to indicate the page number to query, pageSize to represent the amount of data per page, and sortBy for the sorting rule. A PageRequest object is created and used to query with userRepository.findAll(pageable) method.<\/p>\n<p>Finally, you can call the getUsers method from the UserService in the Controller layer to retrieve pagination data and send it back to the frontend.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@RestController<\/span>\r\n<span class=\"hljs-meta\">@RequestMapping(\"\/users\")<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserController<\/span> {\r\n    <span class=\"hljs-meta\">@Autowired<\/span>\r\n    <span class=\"hljs-keyword\">private<\/span> UserService userService;\r\n    \r\n    <span class=\"hljs-meta\">@GetMapping<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> ResponseEntity&lt;Page&lt;User&gt;&gt; <span class=\"hljs-title function_\">getUsers<\/span><span class=\"hljs-params\">(\r\n            <span class=\"hljs-meta\">@RequestParam(defaultValue = \"0\")<\/span> <span class=\"hljs-type\">int<\/span> pageNo,\r\n            <span class=\"hljs-meta\">@RequestParam(defaultValue = \"10\")<\/span> <span class=\"hljs-type\">int<\/span> pageSize,\r\n            <span class=\"hljs-meta\">@RequestParam(defaultValue = \"id\")<\/span> String sortBy)<\/span> {\r\n        Page&lt;User&gt; page = userService.getUsers(pageNo, pageSize, sortBy);\r\n        <span class=\"hljs-keyword\">return<\/span> ResponseEntity.ok(page);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>The getUsers method in the above code accepts three optional request parameters: pageNo indicates the page number to be queried, defaulting to 0, pageSize indicates the amount of data per page, defaulting to 10, sortBy indicates the sorting rule, defaulting to sorting by id. Call the userService.getUsers method to retrieve paginated data and wrap it in a ResponseEntity object to return to the frontend.<\/p>\n<p>By accessing the \/users interface, you will be able to retrieve the results of a paginated query. For example, by accessing \/users?pageNo=0&#038;pageSize=10&#038;sortBy=name, you will receive the first page with 10 data entries sorted by the name field.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728SpringBoot\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528Spring Data JPA\u63d0\u4f9b\u7684PagingAndSortingRepository\u63a5\u53e3\u6765\u5b9e\u73b0\u5206\u9875\u67e5\u8be2\u3002 Firstly, extend the PagingAndSortingRepository interface in your Repository interface and specify the entity class and primary key type. For example, if you want to perform pagination queries on an entity called User, you can create a UserRepository interface like the following: @Repository public interface UserRepository extends PagingAndSortingRepository&lt;User, Long&gt; { } Next, inject [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-18619","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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>How can Spring Boot implement pagination for data querying? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How can Spring Boot implement pagination for data querying?\" \/>\n<meta property=\"og:description\" content=\"\u5728SpringBoot\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528Spring Data JPA\u63d0\u4f9b\u7684PagingAndSortingRepository\u63a5\u53e3\u6765\u5b9e\u73b0\u5206\u9875\u67e5\u8be2\u3002 Firstly, extend the PagingAndSortingRepository interface in your Repository interface and specify the entity class and primary key type. For example, if you want to perform pagination queries on an entity called User, you can create a UserRepository interface like the following: @Repository public interface UserRepository extends PagingAndSortingRepository&lt;User, Long&gt; { } Next, inject [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T17:20:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-21T13:44:28+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Taylor\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Taylor\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/\"},\"author\":{\"name\":\"Benjamin Taylor\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/ac801fe9549a25960ce48aa2e0a691c9\"},\"headline\":\"How can Spring Boot implement pagination for data querying?\",\"datePublished\":\"2024-03-15T17:20:38+00:00\",\"dateModified\":\"2024-03-21T13:44:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/\"},\"wordCount\":278,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-implement-pagination-for-data-querying\/\",\"name\":\"How can Spring Boot implement pagination for data querying? 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