@PathVariable绑定URI模板变量值
@PathVariable用于将请求URL中的模板变量映射到功能处理方法的参数上。
|
1 2 3 4 |
@RequestMapping (value= "/users/{userId}/topics/{topicId}" ) public String test( @PathVariable (value= "userId" ) int userId, @PathVariable (value= "topicId" ) int topicId) |
如请求的URL为[控制器URL/users/123/topics/456]，则自动将URL中模板变量{userId}和{topicId}绑定到通过@PathVariable注解的同名参数上，即入参后userId=123、topicId=456。
代码在PathVariableTypeController中。
@RequestParam(参数绑定到控制器)和@PathVariable(参数绑定到url模板变量)
spring mvc:练习 @RequestParam和@PathVariable
@RequestParam : 注解将请求参数绑定到你的控制器方法参数 @PathVariable : 注释将一个方法参数绑定到一个URI模板变量的值@RequestParam: 注解将请求参数绑定到你的控制器方法参数
|
1 2 3 |
@RequestMapping (value= "/example/user" ) public String UserInfo(Model model, @RequestParam (value= "name" , defaultValue= "Guest" ) String name)
|
实例：
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 |
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;
@Controller public 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: 注释将一个方法参数绑定到一个URI模板变量的值
|
1 2 3 4 5 |
@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) |
实例：
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 |
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;
@Controller public 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" ; } } |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。
原文链接：https://blog.csdn.net/PKWind/article/details/49757219
查看更多关于spring mvc @PathVariable绑定URI模板变量值方式的详细内容...