异常处理类

@Data
public class ErrorResult implements Serializable {
    private Integer code;
    private String message;
    private boolean success = false;
    @JsonIgnore
    private ResultCode resultCode;
    public static ErrorResult error() {
        ErrorResult result = new ErrorResult();
        result.setResultCode(ResultCode.INTERNAL_ERROR);
        return result;
    }
    public static ErrorResult error(String message) {
        ErrorResult result = new ErrorResult();
        result.setCode(ResultCode.INTERNAL_ERROR.code());
        result.setMessage(message);
        return result;
    }
    public static ErrorResult error(Integer code, String message) {
        ErrorResult result = new ErrorResult();
        result.setCode(code);
        result.setMessage(message);
        return result;
    }
    public static ErrorResult error(ResultCode resultCode, String message) {
        ErrorResult result = new ErrorResult();
        result.setResultCode(resultCode);
        result.setMessage(message)
        return result;
    }
}

@Data
public class BaseException extends RuntimeException {
    private static final int BASE_EXCEPTION_CODE = ResultCode.INTERNAL_ERROR.code();
    private static final String BASE_EXCEPTION_MESSAGE = ResultCode.INTERNAL_ERROR.message();
    private Integer code;
    private String message;
    public BaseException() {
        super(BASE_EXCEPTION_MESSAGE);
        this.code = BASE_EXCEPTION_CODE;
        this.message = BASE_EXCEPTION_MESSAGE;
    }
    public BaseException(String message) {
        super(message);
        this.code = BASE_EXCEPTION_CODE;
        this.message = message;
    }
    public BaseException(ResultCode resultCode) {
        super(resultCode.message());
        this.code = resultCode.code();
        this.message = resultCode.message();
    }
    public BaseException(Throwable cause) {
        super(cause);
        this.code = BASE_EXCEPTION_CODE;
        this.message = BASE_EXCEPTION_MESSAGE;
    }
    public BaseException(String message, Throwable cause) {
        super(message, cause);
        this.code = BASE_EXCEPTION_CODE;
        this.message = message;
    }
    public BaseException(Integer code, String message) {
        super(message);
        this.code = code;
        this.message = message;
    }
    public BaseException(Integer code, String message, Throwable cause) {
        super(message, cause);
        this.code = code;
        this.message = message;
    }
}

public class BizException extends BaseException {
    public BizException(ResultCode resultCode) {
        super(resultCode);
    }
}

@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {
    /**
     * 统一处理自定义基础异常
     */
    @ExceptionHandler(BaseException.class)
    public ErrorResult baseException(BaseException e) {
        if (StringUtils.isEmpty(e.getCode())) {
            return ErrorResult.error(e.getMessage());
        }
        return ErrorResult.error(e.getCode(), e.getMessage());
    }
    /**
     * 统一处理自定义业务异常
     */
    @ExceptionHandler(BizException.class)
    public ErrorResult bizException(BizException e) {
        if (StringUtils.isEmpty(e.getCode())) {
            return ErrorResult.error(e.getMessage());
        }
        return ErrorResult.error(e.getCode(), e.getMessage());
    }
    /**
     * 统一处理非自定义异常外的所有异常
     */
    @ExceptionHandler(Exception.class)
    public ErrorResult handleException(Exception e) {
        log.error(e.getMessage(), e);
        return ErrorResult.error(e.getMessage());
    }
    /**
     * 兼容Validation校验框架：忽略参数异常处理器
     */
    @ExceptionHandler(MissingServletRequestParameterException.class)
    public ApiResult<String> parameterMissingExceptionHandler(MissingServletRequestParameterException e) {
        log.error(e.getMessage(), e);
        return ErrorResult.error(PARAMETER_EXCEPTION, "请求参数 " + e.getParameterName() + " 不能为空");
    }
    /**
     * 兼容Validation校验框架：缺少请求体异常处理器
     */
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public ErrorResult parameterBodyMissingExceptionHandler(HttpMessageNotReadableException e) {
        log.error(e.getMessage(), e);
        return ErrorResult.error(PARAMETER_EXCEPTION, "参数体不能为空");
    }
    /**
     * 兼容Validation校验框架：参数效验异常处理器
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ErrorResult parameterExceptionHandler(MethodArgumentNotValidException e) {
        log.error(e.getMessage(), e);
        // 获取异常信息
        BindingResult exceptions = e.getBindingResult();
        // 判断异常中是否有错误信息，如果存在就使用异常中的消息，否则使用默认消息
        if (exceptions.hasErrors()) {
            List<ObjectError> errors = exceptions.getAllErrors();
            if (!errors.isEmpty()) {
                // 这里列出了全部错误参数，按正常逻辑，只需要第一条错误即可
                FieldError fieldError = (FieldError) errors.get(0);
                return ErrorResult.error(PARAMETER_EXCEPTION, fieldError.getDefaultMessage());
            }
        }
        return ErrorResult.error(PARAMETER_EXCEPTION, "请求参数校验异常");
    }
}