{"id":15454,"date":"2024-03-15T11:11:03","date_gmt":"2024-03-15T11:11:03","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-achieve-dynamic-parameter-passing\/"},"modified":"2025-08-06T18:45:12","modified_gmt":"2025-08-06T18:45:12","slug":"how-can-spring-boot-achieve-dynamic-parameter-passing","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-spring-boot-achieve-dynamic-parameter-passing\/","title":{"rendered":"How can Spring Boot achieve dynamic parameter passing?"},"content":{"rendered":"<p>Spring Boot can achieve dynamic parameter passing by using the @RequestParam annotation.<\/p>\n<p>The @RequestParam annotation is used to bind request parameters to method parameters. It can specify the parameter&#8217;s name, whether it is required, default value, etc.<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@GetMapping(\"\/hello\")<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">hello<\/span><span class=\"hljs-params\">(<span class=\"hljs-meta\">@RequestParam(\"name\")<\/span> String name)<\/span> {\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"Hello \"<\/span> + name;\r\n}\r\n<\/code><\/pre>\n<p>In the above example, the &#8220;name&#8221; parameter is required. If the parameter is not passed in the request, an exception will be thrown. The parameter can be set as optional by setting the required attribute to false.<\/p>\n<p>The car needs to be repaired by a mechanic. <\/p>\n<p>Option: The mechanic needs to repair the car.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">@GetMapping(\"\/hello\")<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">hello<\/span><span class=\"hljs-params\">(<span class=\"hljs-meta\">@RequestParam(value = \"name\", required = false)<\/span> String name)<\/span> {\r\n    <span class=\"hljs-keyword\">if<\/span> (name != <span class=\"hljs-literal\">null<\/span>) {\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"Hello \"<\/span> + name;\r\n    } <span class=\"hljs-keyword\">else<\/span> {\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"Hello\"<\/span>;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>In addition to basic types, the @RequestParam annotation also supports binding request parameters to custom objects.<\/p>\n<p>Original: \u6211\u4eec\u5fc5\u987b\u79ef\u6781\u5e94\u5bf9\u53d8\u5316\uff0c\u624d\u80fd\u5b9e\u73b0\u6210\u529f\u3002<\/p>\n<p>Paraphrased: We must actively adapt to change in order to achieve success.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">User<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> String name;\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> age;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ getters and setters<\/span>\r\n}\r\n\r\n<span class=\"hljs-meta\">@GetMapping(\"\/hello\")<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">hello<\/span><span class=\"hljs-params\">(<span class=\"hljs-meta\">@RequestParam(\"name\")<\/span> String name, <span class=\"hljs-meta\">@RequestParam(\"age\")<\/span> <span class=\"hljs-type\">int<\/span> age)<\/span> {\r\n    <span class=\"hljs-type\">User<\/span> <span class=\"hljs-variable\">user<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">User<\/span>();\r\n    user.setName(name);\r\n    user.setAge(age);\r\n    \r\n    <span class=\"hljs-comment\">\/\/ do something with the user object<\/span>\r\n    \r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"Hello \"<\/span> + name;\r\n}\r\n<\/code><\/pre>\n<p>In the example above, the name and age parameters in the request will be bound to the corresponding properties of the User object.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spring Boot can achieve dynamic parameter passing by using the @RequestParam annotation. The @RequestParam annotation is used to bind request parameters to method parameters. It can specify the parameter&#8217;s name, whether it is required, default value, etc. \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\uff1a @GetMapping(&#8220;\/hello&#8221;) public String hello(@RequestParam(&#8220;name&#8221;) String name) { return &#8220;Hello &#8221; + name; } In the above example, [&hellip;]<\/p>\n","protected":false},"author":12,"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":[453,1402,299,1404,1403],"class_list":["post-15454","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"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 achieve dynamic parameter passing? - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about how can spring boot achieve dynamic parameter passing?. 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