Java 统一返回结果集封装

我不是女神ヾ 2023-06-17 02:58 7阅读 0赞

### Java 统一返回结果集封装 ###

*  封装实体类
 *  调用

# 封装实体类 #

/** * 统一返回结果集实体类 * @param <T> 返回数据对象 */
    @Data
    public class ErrorMsg<T> { 
    
        //错误码
        private Integer errorCode;
    
        //错误信息，一般为前端提示信息
        private String errorMsg;
    
        //返回值，一般为成功后返回的数据
        private T data;
    
        //错误详情，一般为失败后的详细原因，如空指针之类的
        private String errorDetail;
    
        public ErrorMsg() { }
    
        public ErrorMsg(Integer errorCode, String errorMsg) { 
            this.errorCode = errorCode;
            this.errorMsg = errorMsg;
        }
    
        public ErrorMsg(Integer errorCode, String errorMsg, T data) { 
            this.errorCode = errorCode;
            this.errorMsg = errorMsg;
            this.data = data;
        }
    
        /** * 配合静态对象直接设置 data 参数 * @param data * @return */
        public ErrorMsg setNewData(T data) { 
            ErrorMsg error = new ErrorMsg();
            error.setErrorCode(this.errorCode);
            error.setErrorMsg(this.errorMsg);
            error.setErrorDetail(this.errorDetail);
            error.setData(data);
            return error;
        }
    
        /** * 配合静态对象直接设置 errorMsg 参数 * @param errorMsg * @return */
        public ErrorMsg setNewErrorMsg(String errorMsg) { 
            ErrorMsg error = new ErrorMsg();
            error.setErrorCode(this.errorCode);
            error.setErrorMsg(errorMsg);
            error.setErrorDetail(this.errorDetail);
            error.setData(this.data);
            return error;
        }
    
        public static final ErrorMsg SUCCESS = new ErrorMsg(200, "成功");
    
        public static final ErrorMsg INSERT_SUCCESS = new ErrorMsg(200, "新增成功");
    
        public static final ErrorMsg UPDATE_SUCCESS = new ErrorMsg(200, "更新成功");
    
        public static final ErrorMsg DELETE_SUCCESS = new ErrorMsg(200, "删除成功");
    
        public static final ErrorMsg UPLOAD_SUCCESS = new ErrorMsg(200, "上传成功");
    
        public static final ErrorMsg DOWNLOAD_SUCCESS = new ErrorMsg(200, "下载成功");
    
        public static final ErrorMsg LOGIN_SUCCESS = new ErrorMsg(200, "登陆成功");
    
        public static final ErrorMsg LOGOUT_SUCCESS = new ErrorMsg(200, "登出成功");
    
        public static final ErrorMsg LOGIN_ERROR = new ErrorMsg(201, "登陆错误");
    
        public static final ErrorMsg LOGIN_EXPIRE = new ErrorMsg(202, "登陆过期");
    
        public static final ErrorMsg ACCESS_LIMITED = new ErrorMsg(301, "访问受限");
    
        public static final ErrorMsg ARGS_ERROR = new ErrorMsg(501, "参数错误");
    
        public static final ErrorMsg UNKOWN_ERROR = new ErrorMsg(502, "系统异常");
    
        public static final ErrorMsg INSERT_ERROR = new ErrorMsg(503, "新增错误");
    
        public static final ErrorMsg UPDATE_ERROR = new ErrorMsg(504, "更新错误");
    
        public static final ErrorMsg DELETE_ERROR = new ErrorMsg(506, "删除错误");
    
        public static final ErrorMsg UPLOAD_ERROR = new ErrorMsg(507, "上传错误");
    
        public static final ErrorMsg DOWNLOAD_ERROR = new ErrorMsg(508, "下载错误");
    
        public static final ErrorMsg OTHER_SYSTEM_ERROR = new ErrorMsg(509, "调用系统异常");
    }

# 调用 #

**成功返回**

return ErrorMsg.SUCCESS;

**成功带参返回**

return ErrorMsg.SUCCESS.setNewData(list);

**错误返回并设定自定义错误信息**

return ErrorMsg.LOGIN_ERROR.setNewErrorMsg("用户名或密码不正确");