SpringBoot之返回json数据的实现方法

/**
 * Created by CR7 on 2017-8-18 返回Json数据实体类
 */
public class User {
  private int id;
  private String username;
  private String password;

  public String getPassword() {
    return password;
  }

  public void setPassword(String password) {
    this.password = password;
  }

  public String getUsername() {
    return username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }
}

import com.example.bean.User;
import org.spring work.web.bind.annotation.RequestMapping;
import org.spring work.web.bind.annotation.RestController;

/**
 * Created by CR7 on 2017-8-18 Json返回数据的Controller
 */
@RestController
@RequestMapping(\"user\")  
public class ReturnJsoncontroller {

  @RequestMapping(\"getUser\")
  public User getUser(){
    User user = new User();
    user.setId(1);
    user.setUsername(\"zhanghaoliang\");
    user.setPassword(\"1231\");
    return user;
  }
}

package com.example.demo;

import com.example.bean.User;
import org.spring work.web.bind.annotation.RequestMapping;
import org.spring work.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by CR7 on 2017-8-18 Json返回数据的Controller
 */
@RestController
@RequestMapping(\"user\")
public class ReturnJsoncontroller {
  
  @RequestMapping(\"getUserList\")
  public List<User> getUserList(){
    User user1 = new User();
    user1.setId(1);
    user1.setUsername(\"zhanghaoliang\");
    user1.setPassword(\"123\");
    User user2 = new User();
    user2.setId(2);
    user2.setUsername(\"chensi\");
    user2.setPassword(\"456\");
    User user3 = new User();
    user3.setId(3);
    user3.setUsername(\"doudou\");
    user3.setPassword(\"789\");
    List<User> list = new ArrayList<>();
    list.add(user1);
    list.add(user2);
    list.add(user3);
    return list;
  }
}

package com.example.demo;

import com.example.bean.User;
import org.spring work.web.bind.annotation.RequestMapping;
import org.spring work.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by CR7 on 2017-8-18 Json返回数据的Controller
 */
@RestController
@RequestMapping(\"user\")
public class ReturnJsoncontroller {

  @RequestMapping(\"getUserMap\")
  public Map<String,User> getUserMap(){
    User user1 = new User();
    user1.setId(1);
    user1.setUsername(\"zhanghaoliang\");
    user1.setPassword(\"123\");
    User user2 = new User();
    user2.setId(2);
    user2.setUsername(\"chensi\");
    user2.setPassword(\"456\");
    User user3 = new User();
    user3.setId(3);
    user3.setUsername(\"doudou\");
    user3.setPassword(\"789\");
    Map<String,User> map = new HashMap<>();
    map.put(\"user1\",user1);
    map.put(\"user2\",user2);
    map.put(\"user3\",user3);
    return map;
  }
}