@PathVariable綁定URI模板變量值
@PathVariable用于將請求URL中的模板變量映射到功能處理方法的參數(shù)上。
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@RequestMapping(value="/users/{userId}/topics/{topicId}") public String test( @PathVariable(value="userId") int userId, @PathVariable(value="topicId") int topicId) |
如請求的URL為“控制器URL/users/123/topics/456”，則自動將URL中模板變量{userId}和{topicId}綁定到通過@PathVariable注解的同名參數(shù)上，即入?yún)⒑髐serId=123、topicId=456。
代碼在PathVariableTypeController中。
@RequestParam(參數(shù)綁定到控制器)和@PathVariable(參數(shù)綁定到url模板變量)
spring mvc:練習 @RequestParam和@PathVariable
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@RequestParam: 注解將請求參數(shù)綁定到你的控制器方法參數(shù) -
@PathVariable: 注釋將一個方法參數(shù)綁定到一個URI模板變量的值
@RequestParam: 注解將請求參數(shù)綁定到你的控制器方法參數(shù)
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@RequestMapping(value="/example/user")public String UserInfo(Model model, @RequestParam(value="name", defaultValue="Guest") String name) |
實例：
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package springmvc; import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam; @Controllerpublic class RequestParamExampleController { @RequestMapping(value="/example/user") public String UserInfo(Model model, @RequestParam(value="name", defaultValue="Guest") String name) { model.addAttribute("name", name); if("admin".equals(name)) { model.addAttribute("email", "admin@google.com"); }else { model.addAttribute("email", "not set"); } return "example_user"; }} |
@PathVariable: 注釋將一個方法參數(shù)綁定到一個URI模板變量的值
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@RequestMapping(value="/example/info/{language}/{id}/{name}")public String userInfo2(Model model, @PathVariable(value="language") String language, @PathVariable(value="id") Long id, @PathVariable(value="name") String name) |
實例：
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package springmvc;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.PathVariable; @Controllerpublic class RequestParamExampleController { @RequestMapping(value="/example/person/{name}/{age}") public String userPerson(Model model, @PathVariable(value="name") String name, @PathVariable(value="age") Long age) { model.addAttribute("name", name); model.addAttribute("age", age); String desc = ""; if(age > 20) { desc = "oldman"; }else { desc = "yongman"; } model.addAttribute("desc", desc); return "example_person"; } } |
以上為個人經(jīng)驗，希望能給大家一個參考，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/PKWind/article/details/49757219
