SpringBoot简单程序实现一个json数据返回

偏执的太偏执、 2023-10-01 12:25 14阅读 0赞

Application ：

package com.example.demo;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.web.bind.annotation.RestController;
    
    @SpringBootApplication
    @RestController
    public class DemoApplication {
        public static void main(String[] args) {
            SpringApplication.run(DemoApplication.class, args);
        }
    }

json数据bean：

package com.example.demo;
    
    public class JsonData {
        public long id;
        public String data = "";
    
        public JsonData(long id, String data) {
            this.id = id;
            this.data = data;
        }
    
        public void setId(long id) {
            this.id = id;
        }
    
        public long getId() {
            return id;
        }
    
        public void setData(String data) {
            this.data = data;
        }
    
        public String getData() {
            return data;
        }
    }

控制器controller：

package com.example.demo;
    
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class JsonTestController {
        @GetMapping("/jsontest")
        public JsonData myjsontest(@RequestParam(value = "name", defaultValue = "null") String name) {
            return new JsonData(2021, "zhangphil");
        }
    }

注意，路由和函数名一一对应。

启动程序，在浏览器输入：  
  
[http://localhost:8080/jsontest][http_localhost_8080_jsontest]

页面返回内容：

{"id":2021,"data":"zhangphil"}

[http_localhost_8080_jsontest]: http://localhost:8080/jsontest