Eclipse中新建SpringBoot项目完成对json、pojo、map、list的请求

场景

Eclipse中新建SpringBoot项目并请求json数据返回HelloWorld见：

实现

新建poji包，并新建User

package com.example.demo.pojo;

public class User {
 private Integer id;
 private String username;
 private String password;
 public Integer getId() {
  return id;
 }
 public void setId(Integer id) {
  this.id = id;
 }
 public String getUsername() {
  return username;
 }
 public void setUsername(String username) {
  this.username = username;
 }
 public String getPassword() {
  return password;
 }
 public void setPassword(String password) {
  this.password = password;
 }

}

完善Controller

package com.example.demo.controller;

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

import javax.print.attribute.HashAttributeSet;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.example.demo.pojo.User;
import com.sun.javafx.collections.MappingChange.Map;

/**
 * @author badao
 * @Description:测试
 * @Time:2019年3月6日 下午11:20:19
 */
@RestController
public class UserController {
 
 /**
  * 返回基本类型json数据
  * @return
  */
 @RequestMapping("hello")
 public String showhello() {
  return "hello world,badao Spring Boot";
 }
 
 /**
  * 返回pojo对象
  * @return
  */
 @RequestMapping("pojo")
 public User showUser() {
  User user = new User();
  user.setId(1);
  user.setUsername("霸道");
  user.setPassword("123");
  
  return user;
  
 }
 
 /**
  * 返回Map集合对象
  * @return
  */
 @RequestMapping("maps")
 public HashMap<String, Object> showMaps() {
  HashMap<String, Object> maps = new HashMap<String,Object>();
  maps.put("username","霸道");
  maps.put("password", "123");
  maps.put("mapkey", "mapvalue");
  return maps;
  
 }
 
 /**
  * 返回List集合对象
  * @return
  */
 @RequestMapping("list")
 public List<User> showList() {
  List<User> list =new ArrayList<User>();
  User user1 =new User();
  user1.setId(1);
  user1.setUsername("badao");
  user1.setPassword("123");
  User user2 =new User();
  user2.setId(1);
  user2.setUsername("badao");
  user2.setPassword("123");
  list.add(user1);
  list.add(user2);
  return list;
  
 }
}

运行结果

打开浏览器输入：

​​http://localhost:8080/pojo​​

 

​​http://localhost:8080/maps​​

​​http://localhost:8080/list​​