Result对象 + 统一异常处理

错误异常码设计1.1 统一异常码接口定义/** * 统一异常码接口定义 * * @author 王洪玉 * @date 2018/11/11 /public interface ExceptionEnum { /* * 获取异常编码 * * @return 异常码 / Integer getCode(); /* * 获取异常信息 * * @return 异常信息 / String getMessage();}1.2. 通用异常错误码Enum/* * 全局异常错误码 /public enum ResultMsgEnum implements ExceptionEnum { // 请求成功 SUCCESS(200,“成功”), // 服务器内部错误 ERROR(500,“失败”); private int code; private String message; ResultMsgEnum(int value, String text) { this.code = value; this.message = text; } @Override public Integer getCode() { return code; } @Override public String getMessage() { return message; }}1.3. 业务异常错误码Enum/* * CMS系统错误异常码 5001** /public enum CmsErrorCodeEnum implements ExceptionEnum { // 文章错误 Article_NOT_EXIST(500100,“该文章不存在”); CmsErrorCodeEnum(Integer code, String message) { this.code = code; this.message = message; } private Integer code; private String message; @Override public Integer getCode() { return code; } @Override public String getMessage() { return message; }}2. Result对象设计/* * 通用返回result /@Datapublic class ZingResult<T> implements Serializable { private int code; private String msg; private T data; private ZingResult() { this.code = ResultMsgEnum.SUCCESS.getCode(); this.msg = ResultMsgEnum.SUCCESS.getMessage(); } private ZingResult(T data) { this.code = ResultMsgEnum.SUCCESS.getCode(); this.msg = ResultMsgEnum.SUCCESS.getMessage(); this.data = data; } private ZingResult(ExceptionEnum exceptionEnum) { this.code = exceptionEnum.getCode(); this.msg = exceptionEnum.getMessage(); } public static ZingResult success() { return new ZingResult(); } public static <T> ZingResult<T> success(T data) { return new ZingResult<>(data); } public static <T> ZingResult<T> error(ExceptionEnum exceptionEnum) { return new ZingResult<>(exceptionEnum); }}3. 统一异常处理3.1 异常父类/* * 异常父类 * * @author 王洪玉 * @date 2018/11/11 /@Getterpublic class ZingException extends RuntimeException { private Integer code; private String message; public ZingException(ExceptionEnum exceptionEnum){ super(exceptionEnum.getMessage()); this.code = exceptionEnum.getCode(); this.message = exceptionEnum.getMessage(); }}3.2 业务异常类/* * 业务自定义异常类 /@Getterpublic class BusinessException extends ZingException { private ExceptionEnum exceptionEnum; public BusinessException(ExceptionEnum exceptionEnum) { super(exceptionEnum); this.exceptionEnum = exceptionEnum; }}3.3 异常拦截处理@Slf4j@ResponseBody@ControllerAdvicepublic class GlobalExceptionHandler { /* * 拦截未知错误异常 * * @param request 请求 * @param e 未知异常 * @return 通用返回格式 / @ExceptionHandler(Exception.class) public ZingResult cmsException(HttpServletRequest request, Exception e) { log.error(“请求的url为{}出现系统异常,异常信息为:”, request.getRequestURI(), e); return ZingResult.error(ResultMsgEnum.ERROR); } /* * 拦截CMS业务异常 * * @param request 请求 * @param e 业务异常 * @return 通用返回格式 */ @ExceptionHandler(CmsBusinessException.class) public ZingResult cmsBusinessException(HttpServletRequest request, CmsBusinessException e) { log.error(“请求的url为{}出现业务异常,异常信息为:”, request.getRequestURI(), e); return ZingResult.error(e.getExceptionEnum()); }}4. 使用示例if(CollectionUtils.isEmpty(articleList)){ throw new CmsBusinessException(CmsErrorCodeEnum.ARTICLE_NOT_EXIST);}