java - 前台向后台传一个json数据，后台怎么接？

Question

前台向后台传一个json数据，后台怎么接？SpringMVC有一个注解可以做到，请问是什么注解？谢谢。

Answer 1

@RequestBody？

Answer 2

@RequestParam(value="变量名")后面定义自己的变量

Answer 3

  * 用户注册
  */
 @ResponseBody
 @RequestMapping(value="/register", method=RequestMethod.GET) //这里是请求的路径
 public void register( @RequestParam(value="username", required=fasle, defaultValue="") String name,
         @RequestParam(value="mail", required=fasle, defaultValue="") String mail,
         @RequestParam(value="password", required=fasle, defaultValue="") String pwd,
         @RequestParam(value="depa", required=fasle, defaultValue="") String depa) {
     super.isBank( name, mail, pwd, depa);
     User u = new User( name, mail, pwd, depa);
     //....这里写其他的逻辑代码
 }```
也可以这样打印出参数

public static voidprintParas(HttpServletRequest request) {
     Enumeration<?>  e = request.getParameterNames(); 
     while(e.hasMoreElements()){  
         String name = (String) e.nextElement();  
         String value = request.getParameter(name); 
         System.out.println( name + " = " + value); 
     }
 }