springmvc中数据绑定

1：同属性的情况,即 user1和user2含有相同的属性

//http://localhost:9080/es-web/binder/test1?user1.id=1&user2.id=2  
@RequestMapping("/test1")  
public String test1(@ModelAttribute("user1") User user1, @ModelAttribute("user2") User user2) {  
    System.out.println(user1);  
    System.out.println(user2);  
    return "";  
}  
  
@InitBinder("user1")  
public void initBinder1(WebDataBinder binder) {  
    binder.setFieldDefaultPrefix("user1.");  
}  
  
@InitBinder("user2")  
public void initBinder2(WebDataBinder binder) {  
    binder.setFieldDefaultPrefix("user2.");  
}  

//    如果请求的对象是list的对象eg：List<User>,这种方式是不对的
    @RequestMapping("USER")
    public String user(List<User> userList) {
        return userList.toString();
    }

package com.cx.bean;

import java.util.List;

/**
 * Created by Administrator on 2017/9/1 0001.
 */
public class UserForm {
    public List<User> userList;

    public List<User> getUserList() {
        return userList;
    }

    public void setUserList(List<User> userList) {
        this.userList = userList;
    }

    @Override
    public String toString() {
        return "userForm{" +
                "userList=" + userList +
                '}';
    }
}

 //  可以通过userList.name 进行访问即可
   @RequestMapping("USER")
   private String user(UserForm userForm ) {
       return userList.toString();
   }

package com.cx.bean;

import java.util.Map;

/**
 * Created by Administrator on 2017/9/1 0001.
 */
public class userForm {
    public Map<String,User> users;

    public Map<String, User> getUsers() {
        return users;
    }

    public void setUsers(Map<String, User> users) {
        this.users = users;
    }

    @Override
    public String toString() {
        return "userForm{" +
                "users=" + users +
                '}';
    }
}

 //  可以通过users['x'].name=tom 进行访问即可,其中x是键值
   @RequestMapping("USER")
   private String user(UserForm userForm ) {
       return users.toString();
   }

4：json进行访问

4.1 需要依赖的jar包

<dependency>
    <groupId>org.codehaus.jackson</groupId>
    <artifactId>jackson-mapper-asl</artifactId>
    <version>1.9.13</version>
</dependency>

   @ResponseBody
    @RequestMapping("user")
    public String json(@RequestBody  User user) {
        return user.toString();
    }

最后

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