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
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/** * 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
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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
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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
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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服务器之家。
原文链接：https://www.cnblogs.com/zhanghaoliang/p/7389336.html
