java package returned data

public class Result<T> {
    private Integer code;
    private String msg;
    private T data;

    public Result() {
        super();
    }

    public Result(Integer code, String msg, T data) {
        this.code = code;
        this.msg = msg;
        this.data = data;
    }

    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;
    }

    @Override
    public String toString() {
        return "Result{" +
                "code=" + code +
                ", msg='" + msg + '\'' +
                ", data=" + data +
                '}';
    }
}

public  enum ResultEnum {
     // here is their definition, to facilitate interaction with distal 
    UNKNOWN_ERROR (-1, "Unknown error" ), 
    SUCCESS ( 200 is, "success" ), 
    SERVER_INTERNAL_ERROR ( 500, "Internal Server Error" ), 
    RESOURCE_NOT_FOUND ( 404, "resource not found" ), 
    PARAMETER_NOT_VALID ( 400, "invalid parameters" ), 
    ; 
    Private Integer code;
     Private String MSG; 

    ResultEnum (code Integer, String MSG) { 
        the this .code = code;
         the this a .msg = msg;
    }

    public Integer getCode() {
        return code;
    }

    public String getMsg() {
        return msg;
    }
}

public  class ResultUtil { 

    / ** successful and the band data * * / 
    public  static the Result Success (Object Object) { 
        the Result Result = new new the Result (); 
        result.setCode (ResultEnum.SUCCESS.getCode ()); 
        result.setMsg (ResultEnum. SUCCESS.getMsg ()); 
        result.setData (Object); 
        return Result; 
    } 
    / ** successful but no data * * / 
    public  static the Result success () { 

        return success ( null ); 
    } 
    / ** failed * * / 
    public  static Result error(Integer code,String msg){
        Result result = new Result();
        result.setCode(code);
        result.setMsg(msg);
        return result;
    }
}

//测试
@RequestMapping(value = "/list", method = RequestMethod.POST)
    public Result findCategoryByPid(@RequestBody Map map){
        map.get("parentId");
        List<Category> list = categoryService.findCategoryByPid(map);
        if (CollectionUtils.isEmpty(list)){
            return ResultUtil.error(404,"资源未找到到");
        }
        return ResultUtil.success(list);
    }