struts中使用json返回参数

1.工程视图

2.UserAction.java

package com.ask.action;
  
  public class UserAction {
     private String user;
     
     public String getUser() {
         return user;
     }
     public void setUser(String user) {
         this.user = user;
     }
      public String test(){
           user="user[name:tom,password:123456]";
           return "test";
     }
 }

3.struts.xml