正文
【Spring Boot】Spring Boot之统一异常处理
提示：扫一扫查出行【扫一扫了解最新限行尾号】
复制提示
一、统一异常处理的作用
在web应用中，请求处理时，出现异常是非常常见的。所以当应用出现各类异常时，进行异常的统一捕获或者二次处理(比如空指针异常或sql异常正常是不能外抛)是非常必要的，然后右统一异常处理方法统一返给前端。
对于非自定义的异常，在统一异常处理方法中，会转化为约定了响应的参数格式，如code（非0代表异常）、message，调用方根据错误码进行自己的业务逻辑。
二、统一异常处理方案一
@RestControllerAdvice和@ExceptionHandler的方式
@RestControllerAdvice
public class BaseControllerAdvice {
private static final Logger logger = LoggerFactory.getLogger(BaseControllerAdvice.class);
public static final Pattern ERROR_MESSAGE_PATTERN = Pattern.compile("\\[(\\d{4})\\] (.*)"); public BaseControllerAdvice() {
} @ExceptionHandler
public ApiResponse globalExceptionHandler(HttpServletRequest request, HttpServletResponse response, Exception ex) { logger.error("检测到未捕捉异常：IP:{} invoke url:{} Exception:{}", new Object[]{request.getRemoteAddr(), request.getRequestURL(), ex.getClass().toGenericString(), ex});
//ApiResponse为自定义异常类
ApiResponse apiResponse = new ApiResponse(ApiResponseCodeEnum.SYSTEM_EXCEPTION);
if (ex instanceof ApiException) {
Integer code = ((ApiException)ex).getCode();
return new ApiResponse(code, ex.getMessage());
} else {
if (StringUtils.isNotBlank(ex.getMessage())) {
Matcher matcher = ERROR_MESSAGE_PATTERN.matcher(ex.getMessage());
if (matcher.matches()) {
logger.error(ex.getMessage(), ex);
return apiResponse;
}
} return apiResponse;
} }
}
三、统一异常处理方案二
HandlerExceptionResolver的方式
@Component
public class GlobalHandlerExceptionResolver implements HandlerExceptionResolver { private static final Logger logger = LoggerFactory.getLogger(BaseControllerAdvice.class);
public static final Pattern ERROR_MESSAGE_PATTERN = Pattern.compile("\\[(\\d{4})\\] (.*)"); @Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) { ModelAndView modelAndView = new ModelAndView();
logger.error("检测到未捕捉异常：IP:{} invoke url:{} Exception:{}", new Object[]{request.getRemoteAddr(), request.getRequestURL(), ex.getClass().toGenericString(), ex});
ApiResponse apiResponse = new ApiResponse(ApiResponseCodeEnum.SYSTEM_EXCEPTION);
if (ex instanceof ApiException) {
Integer code = ((ApiException)ex).getCode();
apiResponse =new ApiResponse(code, ex.getMessage());
} else {
if (StringUtils.isNotBlank(ex.getMessage())) {
Matcher matcher = ERROR_MESSAGE_PATTERN.matcher(ex.getMessage());
if (matcher.matches()) {
logger.error(ex.getMessage(), ex);
}
}
} modelAndView.setView(new MappingJackson2JsonView());
modelAndView.addObject("code",apiResponse.getCode());
modelAndView.addObject("message",apiResponse.getMessage());
return modelAndView;
}}
