Can you run your JNI-using Java application from a console window (launch it from a java command line) to see if there is any report of what may have been detected before the JVM was crashed. When running directly as a Java window application, you may be missing messages that would appear if you ran from a console window instead. Secondly, can you stub your JNI DLL implementation to show that methods in your DLL are being entered from JNI, you are returning properly, etc? Just in case the problem is with an incorrect use of one of the JNI-interface methods from the C++ code, have you verified that some simple JNI examples compile and work with your setup? I'm thinking in particular of using the JNI-interface methods for converting parameters to native C++ formats and turning function results into Java types. It is useful to stub those to make sure that the data conversions are working and you are not going haywire in the COM-like calls into the JNI interface. There are other things to check, but it is hard to suggest any without knowing more about what your native Java methods are and what the JNI implementation of them is trying to do. It is not clear that catching an exception from the C++ code level is related to your problem. (You can use the JNI interface to rethrow the exception as a Java one, but it is not clear from what you provide that this is going to help.)

try {
   // ...
} catch (...) {
   // ...
}

注意…catch里面是一个真正的省略号。三个点。

然而，由于c++异常不一定是基Exception类的子类，因此在使用此构造时无法实际看到抛出的异常变量。

try{
    // ...
} catch (...) {
    // ...
}

将捕获所有c++异常，但它应该被认为是糟糕的设计。你可以使用c++11新的current_exception机制，但是如果你没有能力使用c++11(遗留代码系统需要重写)，那么你就没有命名异常指针来获取消息或名称。您可能希望为可以捕获的各种异常添加单独的catch子句，并且只捕获底部的所有内容以记录意外异常。例如:

try{
    // ...
} catch (const std::exception& ex) {
    // ...
} catch (const std::string& ex) {
    // ...
} catch (...) {
    // ...
}

让我在这里提一下:Java

try 
{
...
}
catch (Exception e)
{
...
}

可能无法捕获所有异常!其实我以前也遇到过这种事，很让人抓狂;Exception派生自Throwable。因此，从字面上看，要捕获所有东西，你不希望捕获异常;你想抓住Throwable。

我知道这听起来很挑剔，但是当你花了好几天时间试图弄清楚“未捕获的异常”来自于被try包围的代码时……catch (Exception e)" block来自哪里，它会一直跟着你。

如果你正在寻找特定于windows的解决方案，那么有结构化异常处理: https://learn.microsoft.com/en-us/cpp/cpp/try-except-statement

代码如下所示

__try
{
   // code here may throw or make access violation
}
__except( EXCEPTION_EXECUTE_HANDLER )
{
    // after exception code here, e.g. log the error
}

它不仅可以捕获c++异常，还可以捕获访问违规或其他系统异常。

你可以使用

catch(...)

但这是非常危险的。在约翰·罗宾斯的《调试Windows》一书中，他讲述了一个战争故事，一个非常严重的bug被一个catch(…)命令掩盖了。您最好捕获特定的异常。捕获您认为try块可能合理抛出的任何异常，但如果确实发生意外，则让代码抛出更高的异常。