Spring Boot返回json数据
json
适用于现代 C++ 的 JSON。
项目地址:https://gitcode.com/gh_mirrors/js/json
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原文地址:
http://412887952-qq-com.iteye.com/blog/2291508
在做如下操作之前,我们对之前的Hello进行简单的修改,我们新建一个包com.kfit.test.web 然后新建一个类HelloControoler, 然后修改App.java类,主要是的这个类就是一个单纯的启动类。
主要代码如下:
App.java
packagecom.kfit
importorg.springframework.boot.SpringApplication;
importorg.springframework.boot.autoconfigure.SpringBootApplication;
/**
* Hello world!
*
*/
//其中@SpringBootApplication申明让spring boot自动给程序进行必要的配置,等价于以默认属性使用@Configuration,@EnableAutoConfiguration和@ComponentScan
@SpringBootApplication
publicclassApp {
publicstatic void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
com.kfit.test.web.HelloController
package com.kfit.test.web;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController// 标记为:restful
publicclass HelloController {
@RequestMapping("/")
public String hello(){
return"Hello world!";
}
}
运行代码和之前是一样的效果的。
我们在编写接口的时候,时常会有需求返回json数据,那么在spring boot应该怎么操作呢?主要是在class中加入注解@RestController,。
返回JSON之步骤:
(1)编写一个实体类Demo
(2)编写DemoController;
(3)在DemoController加上@RestController和@RequestMapping注解;
(4)测试
具体代码如下:
package com.kfit.test.bean;
/**
* 测试实体类.
* @author Administrator
*
*/
publicclass Demo {
privatelongid;//主键.
private String name;//测试名称.
publiclong getId() {
returnid;
}
publicvoid setId(longid) {
this.id = id;
}
public String getName() {
returnname;
}
publicvoid setName(String name) {
this.name = name;
}
}
package com.kfit.test.web;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.kfit.test.bean.Demo;
/**
* 测试.
* @author Administrator
*
*/
@RestController
@RequestMapping("/demo")
publicclass DemoController {
/**
* 返回demo数据:
* 请求地址:http://127.0.0.1:8080/demo/getDemo
* @return
*/
@RequestMapping("/getDemo")
public Demo getDemo(){
Demo demo = new Demo();
demo.setId(1);
demo.setName("Angel");
returndemo;
}
}
那么在浏览器访问地址:http://127.0.0.1:8080/demo/getDemo 返回如下数据:
{
id: 1,
name: "Angel"
}
是不是很神奇呢,其实Spring Boot也是引用了JSON解析包Jackson,那么自然我们就可以在Demo对象上使用Jackson提供的json属性的注解,对时间进行格式化,对一些字段进行忽略等等。
GitHub 加速计划 / js / json
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适用于现代 C++ 的 JSON。
最近提交(Master分支:3 个月前 )
2134cb94
* change NLOHMANN_JSON_FROM_WITH_DEFAULT to let NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT work with an empty JSON instance
* fix ci_static_analysis_clang (ci_clang_tidy)
* change NLOHMANN_JSON_FROM_WITH_DEFAULT to let NLOHMANN_DEFINE_TYPE_INTRUSIVE_WITH_DEFAULT work with an empty JSON instance 7 天前
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