Throwable targetException = var6.getTargetException()

This code retrieves the target exception that was thrown by the specified invocation target. In Java, when a method is invoked using reflection, the invoked method may throw an exception. Instead of throwing the exception directly, the method wraps the exception in a InvocationTargetException and throws it. To retrieve the original exception, you can use the getTargetException() method of the InvocationTargetException. This code assigns the target exception to a Throwable variable named targetException.

Throwable targetException = var6.getTargetException();

### 关于 `getTargetException` 方法及其异常处理在 Java 中，反射机制提供了获取目标异常的能力。当通过反射调用方法并捕获到异常时，可以使用 `InvocationTargetException#getTargetException()` 来访问实际抛出的目标异常[^1]。 #### 使用场景与实现方式考虑如下代码片段展示如何利用此功能： ```java try { Method method = MyClass.class.getMethod("myMethod"); Object result = method.invoke(myObject); } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { Throwable targetException = e.getCause(); if (targetException instanceof SpecificException) { // 处理特定类型的异常逻辑 System.out.println("Caught specific exception: " + targetException.getMessage()); } else { throw new RuntimeException(targetException); } } ``` 上述例子中，在尝试调用某个对象的方法失败后会触发不同种类的异常。对于由被调用方法内部引发并通过 `InvocationTargetException` 封装起来的具体业务异常，则可以通过 `getCause()` 或者更推荐的方式即 `getTargetException()` 获取原始异常实例以便进一步分析或重新抛出[^2]。值得注意的是，虽然检查型异常（checked exceptions）最初看起来有助于强制开发者思考可能出现的问题从而提高程序健壮性；但在大型项目实践中往往带来更多的维护成本而非益处[^3]。因此建议谨慎设计API接口中的异常声明策略，并合理运用运行时异常来简化错误传播路径的设计。

Throwable targetException = ex.getTargetException();

在给定的代码片段中，`Throwable targetException = ex.getTargetException();`是获取`InvocationTargetException`中的目标异常对象。`InvocationTargetException`是在反射调用方法时可能抛出的异常，它包装了实际方法调用中抛出的异常。通过`getTargetException()`方法，我们可以获取到实际的目标异常对象，然后可以对其进行进一步处理或抛出。 #### 引用[.reference_title] - *1* *3* [spring @ControllerAdvice处理异常无法正确匹配自定义异常问题](https://blog.csdn.net/qq_36666651/article/details/81192572)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item] - *2* [Spring异步发布监听的使用](https://blog.csdn.net/m0_69270256/article/details/124241895)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item] [ .reference_list ]

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Throwable targetException = var6.getTargetException()

Throwable targetException = var6.getTargetException();

Throwable targetException = ex.getTargetException();

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