spring boot 输出简单 json格式的数据（利用分层结构）

待我称王封你为后i 2022-06-09 00:53 220阅读 0赞

*   *  参考
     *  功能
     *  技术与IDE
     *  代码参考github
     *  代码片段
        
         *  分层结构
         *  model Hellojava
         *  responsitory HelloResponsitoryjava
         *  service HelloServicejava
         *  启动类
         *  访问url
     *  Junit测试类

## 参考： ##

[spring boot 利用分层结构输出简单的Hello world][spring boot _Hello world]

本节把[spring boot 利用分层结构输出简单的Hello world][spring boot _Hello world]  
中的输出改为json格式，只需要稍作修改即可

## 功能 ##

编写一个返回格式是json格式的数据。例如：

\{“username”:”mike”,”age”:27\}

## 技术与IDE ##

spring boot  
IntelliJ IDEA

## 代码参考github： ##

> [Json][]

## 代码片段 ##

### 分层结构 ###

![这里写图片描述][SouthEast]

### model – Hello.java ###

package com.yubai.springbootjson.model;
    
    public class Hello {
        private String username;
        private int age;
    
        public Hello(String username, int age) {
            this.username = username;
            this.age = age;
        }
    
        public String getUsername() {
            return username;
        }
    
        public void setUsername(String username) {
            this.username = username;
        }
    
        public int getAge() {
            return age;
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    }

### responsitory – HelloResponsitory.java ###

package com.yubai.springbootjson.responsitory;
    
    import com.yubai.springbootjson.model.Hello;
    import org.springframework.stereotype.Repository;
    
    @Repository
    public class HelloResponsitory { 
    
        public Hello sayHello() {
            Hello hello = new Hello("jolie", 27);
            return hello;
        }
    }

### service – HelloService.java ###

package com.yubai.springbootjson.service;
    
    import com.yubai.springbootjson.model.Hello;
    import com.yubai.springbootjson.responsitory.HelloResponsitory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class HelloService {
    
        @Autowired
        private HelloResponsitory helloResponsitory;
    
        @RequestMapping("/hello")
        public Hello SayHello(){
            Hello hello =  helloResponsitory.sayHello();
           return hello;
        }
    }

### 启动类 ###

package com.yubai.springbootjson;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class SpringBootJsonApplication { 
    
        public static void main(String[] args) {
            SpringApplication.run(SpringBootJsonApplication.class, args);
        }
    }

### 访问url： ###

![这里写图片描述][SouthEast 1]

## Junit测试类 ##

详情请见代码参考github

[spring boot _Hello world]: http://blog.csdn.net/expect521/article/details/77509420
[Json]: https://github.houston.entsvcs.net/private/Json
[SouthEast]: /images/20220609/e71ccc8eb48b48c6b2b4a57e99184e4a.png
[SouthEast 1]: /images/20220609/0dfdb1c30d824225b183dccc4ce9851c.png