/** * 自定义异常类 * @author ky01 * */@SuppressWarnings("serial")public class ServiceException extends RuntimeException {    private Integer code;    public ServiceException(ErrorCode exceptionEnum) {        super(exceptionEnum.getMsg());        this.code = exceptionEnum.getCode();    }    public ServiceException(Integer code, String msg) {        super(msg);        this.code = code;    }    public Integer getCode() {        return code;    }    public void setCode(Integer code) {        this.code = code;    }}

/** * 统一异常处理类 * @author ky01 * */@ControllerAdvicepublic class ExceptionHandler {    private static final Logger log = LoggerFactory.getLogger(ExceptionHandler.class);        @org.springframework.web.bind.annotation.ExceptionHandler(value = Exception.class)    @ResponseBody    public String exceptionGet(Throwable e){        if(e instanceof ServiceException){            ServiceException myException = (ServiceException)e;            return Result.error(myException.getCode(), myException.getMessage()).toJson();        }                if(e instanceof ValidationException){            ValidationException myException = (ValidationException)e;            return Result.error(ErrorCode.PARAM_INVALID.getCode(), myException.getMessage()).toJson();        }                //RuntimeException统一提示“未知错误”        log.error("【系统异常】", e);        return Result.error(ErrorCode.UNKNOWN_ERROR).toJson();    }    }

使用：在Controller中抛出Exception时都会被ExceptionHandler捕获到并转为相应的字符串返回。