SpringBoot之返回json数据的实现方法
这篇文章主要介绍了SpringBoot之返回json数据的实现方法,小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧一、创建一个springboot个项目
操作详情参考：1.springboo之helloword 快速搭建一个web项目
二、编写实体类
/**
* 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;
}
}
三、编写控制层controller类
import com.example.bean.user;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.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;
}
}
四、测试返回json数据
浏览器输入http://localhost:8080/user/getuser
得出结果：服务器是以json数据格式返回给浏览器
五、返回list到页面
5.1.返回数据的controller
package com.example.demo;
import com.example.bean.user;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.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;
}
}
5.2.得出结果
在浏览器访问 http://localhost:8080/user/getuserlist
六、返回map到浏览器
既然返回实体，和list的试验过了，那么再试验一下返回map类型的数据吧
6.1返回的controller
package com.example.demo;
import com.example.bean.user;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.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;
}
}
6.2得出的结果
在浏览器中访问http://localhost:8080/user/getusermap
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持CodeAE代码之家。
原文链接：https://www.cnblogs.com/zhanghaoliang/p/7389336.html
http://www.zzvips.com/article/172413.html
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