SpringBoot如何统一JSON信息返回

{
    "code":200,
    "msg":"成功",
    "data":"JSON数据"
}

public class ResponseEntity<T> implements Serializable {

    private static final long serialVersionUID = 3595741978061989861L;
    private Integer code;//状态码
    private String msg;//状态码对应信息
    private T data;//要返回的数据


    public Integer getCode() {
        return code;
    }


    public void setCode(Integer code) {
        this.code = code;
    }


    public String getMsg() {
        return msg;
    }


    public void setMsg(String msg) {
        this.msg = msg;
    }


    public T getData() {
        return data;
    }


    public void setData(T data) {
        this.data = data;
    }
}

public enum ResponseEnum {

    SUCCESS(200, "成功"),
    FAIL(-1, "失败"),
    ERROR_400(400, "错误的请求"),
    ERROR_404(404, "访问资源不存在"),
    ERROR_500(500, "服务器异常");


    private Integer code;
    private String msg;


    ResponseEnum(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
    }


    public Integer getCode() {
        return code;
    }


    public void setCode(Integer code) {
        this.code = code;
    }


    public String getMsg() {
        return msg;
    }


    public void setMsg(String msg) {
        this.msg = msg;
    }
}

public class ResponseUtil {

    /**
     * 成功返回
     * @param object 返回数据
     * @return
     */
    public static ResponseEntity success(Object object){
        ResponseEntity resp = new ResponseEntity();
        resp.setCode(ResponseEnum.SUCCESS.getCode());
        resp.setMsg(ResponseEnum.SUCCESS.getMsg());
        resp.setData(object);
        return resp;
    }


    /**
     * 成功返回  无数据
     * @return
     */
    public static ResponseEntity success(){
        return success(null);
    }


    /**
     * 失败返回
     * @param responseEnum 响应标识
     * @return
     */
    public static ResponseEntity error(ResponseEnum responseEnum){
        ResponseEntity resp = new ResponseEntity();
        resp.setCode(responseEnum.getCode());
        resp.setMsg(responseEnum.getMsg());
        return resp;
    }
}

public class DemoEntity {

    private Integer id;
    private String name;


    public Integer getId() {
        return id;
    }


    public void setId(Integer id) {
        this.id = id;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }
}

@Controller
public class DemoController {

    @RequestMapping(value = "/users", method= RequestMethod.GET)
    @ResponseBody
    public ResponseEntity users(){
        List<DemoEntity> list = new ArrayList<DemoEntity>();
        DemoEntity demo = new DemoEntity();
        demo.setId(1);
        demo.setName("蜗牛");
        list.add(demo);
        DemoEntity demo1 = new DemoEntity();
        demo1.setId(2);
        demo1.setName("葡萄");
        list.add(demo1);
        return ResponseUtil.success(list);
    }
}

{"code":200,"msg":"成功","data":[{"id":1,"name":"蜗牛"},{"id":2,"name":"葡萄"}]}

@RestController
public class DemoRestController {

    @RequestMapping(value = "/users1", method= RequestMethod.GET)
    public ResponseEntity users(){
        List<DemoEntity> list = new ArrayList<DemoEntity>();
        DemoEntity demo = new DemoEntity();
        demo.setId(1);
        demo.setName("蜗牛");
        list.add(demo);
        DemoEntity demo1 = new DemoEntity();
        demo1.setId(2);
        demo1.setName("葡萄");
        list.add(demo1);
        return ResponseUtil.success(list);
    }
}