Signature signature = joinPoint.getSignature();之后如何获取方法名，参数

您可以通过以下代码获取方法名和参数：

// 获取方法名
String methodName = signature.getName();

// 获取参数
Object[] args = joinPoint.getArgs();

如果您想获取参数的具体信息，可以使用以下代码：

MethodSignature methodSignature = (MethodSignature) signature;
Class<?>[] parameterTypes = methodSignature.getParameterTypes();
String[] parameterNames = methodSignature.getParameterNames();

for (int i = 0; i < parameterTypes.length; i++) {
    System.out.println("参数名：" + parameterNames[i] + "，参数类型：" + parameterTypes[i].getName() + "，参数值：" + args[i]);
}

请注意，这些代码必须在连接点方法执行之前执行，因为它们需要从连接点的签名中提取信息。

相关问题

@AfterThrowing(value = "execution(* com.dianda.change.service..*.*(..))", throwing = "ex") public void afterThrowingAdvice(JoinPoint joinPoint, Exception ex) { Object targetObject = joinPoint.getTarget(); Signature signature = joinPoint.getSignature(); saveErrorLog(targetObject, signature, ex); }这段代码里边怎么获取请求信息

在 `afterThrowingAdvice` 方法中，您可以通过获取 `HttpServletRequest` 对象来获取请求信息。可以通过以下方式来获取 `HttpServletRequest` 对象：

HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

然后您就可以通过 `HttpServletRequest` 对象获取请求信息了，比如请求 URL、请求参数等信息。例如：

String url = request.getRequestURL().toString();
String method = request.getMethod();
String queryString = request.getQueryString();
Map<String, String[]> parameterMap = request.getParameterMap();
// ...

需要注意的是，在获取 `HttpServletRequest` 对象之前，需要确保 `RequestContextHolder.getRequestAttributes()` 不为空。如果为空，说明当前线程不是一个处理 HTTP 请求的线程，无法获取 `HttpServletRequest` 对象。

优化这段代码: @AfterThrowing(value = "execution(* com.dianda.change.service..*.*(..))", throwing = "ex") public void afterThrowingAdvice(JoinPoint joinPoint, Exception ex) { try { logger.info("进入异常通知方法..."); Object targetObject = joinPoint.getTarget(); Signature signature = joinPoint.getSignature(); // System.out.println("ExceptionClassName={} ===" + ex.getClass().getName()); // // System.out.println("ExceptionClassName={} ===" + ex.getClass().getName()); Map<String, Object> map = new HashMap<>(); map.put("id", UUID.randomUUID().toString()); map.put("JKMC", targetObject.getClass().getName() + " signatureName=" + signature.getName()); map.put("CWMX", ex.getMessage()); map.put("ADDTIME", Format.getDateTime()); InsertParams insertParams = InsertParams.createInsertParams("T_RUN_ERROR_LOG"); insertParams.addParamsForMap(map); baseDaoComponent.insertDataByParams(insertParams); } catch (Exception e) { e.printStackTrace(); } // System.out.println("exception occurred at class "+targetObject.getClass().getName()+ // "\n signatureName="+signature.getName()); //// System.out.println("ExceptionClassName={}"+ ex.getClass().getName()); // System.out.println("message:{}"+ ex.getMessage()); }

这段代码可以进行如下优化：

1. 将 try-catch 语句块中的代码提取到一个方法中，避免重复代码：

   private void saveErrorLog(Object targetObject, Signature signature, Exception ex) {
       try {
           logger.info("进入异常通知方法...");
           Map<String, Object> map = new HashMap<>();
           map.put("id", UUID.randomUUID().toString());
           map.put("JKMC", targetObject.getClass().getName() + " signatureName=" + signature.getName());
           map.put("CWMX", ex.getMessage());
           map.put("ADDTIME", Format.getDateTime());
           InsertParams insertParams = InsertParams.createInsertParams("T_RUN_ERROR_LOG");
           insertParams.addParamsForMap(map);
           baseDaoComponent.insertDataByParams(insertParams);
       } catch (Exception e) {
           e.printStackTrace();
       }
   }

2. 使用 @Slf4j 注解代替手动创建 logger 对象，简化代码：

   @AfterThrowing(value = "execution(* com.dianda.change.service..*.*(..))", throwing = "ex")
   public void afterThrowingAdvice(JoinPoint joinPoint, Exception ex) {
       Object targetObject = joinPoint.getTarget();
       Signature signature = joinPoint.getSignature();
       saveErrorLog(targetObject, signature, ex);
   }

通过上述优化，代码变得更加简洁易读，也更加易于维护。