blocks|key|461081|text|我不这么认为，因为你所描述的行为可以很容易地建模为：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|461082|boolean+success+=+false;

try+{
++...
++success+=+true;
}+catch+(Exception_1+e)+{
++...
}
...
}+catch+(Exception_N+e)+{
++...
}+finally+{
++if+(success)+{
++++//+your+"finally"
++}+else+{
++++//+your+"catch-finally"
++}
}|code-block|syntax|javascript|461083|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I don't think so as the behaviour you describe can be easily modelled as:

<pre><code>boolean success = false;

try {
 ...
 success = true;
} catch (Exception_1 e) {
 ...
}
...
} catch (Exception_N e) {
 ...
} finally {
 if (success) {
 // your "finally"
 } else {
 // your "catch-finally"
 }
}
</code></pre>

blocks|key|4154254|text|您可以在C#中轻松实现这一点。一种简单的方法是将异常保存在catch块中，如果exception对象不为空，则在finally块中记录该异常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4154255|Exception+ex;

try
{

}
catch+(ExceptionType1+type1)
{
++++ex+=+type1;
}
catch+(ExceptionType2+type2)
{
++++ex+=+type2;
}
finally
{
++++if+(ex+!=+null)
++++{
++++++++//Log
++++}
}|code-block|syntax|javascript|4154256|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can easily accomplish that in C#. A simple way would be to save the exception in your catch blocks, then in your finally block, log if the exception object is not null.

<pre><code>Exception ex;

try
{

}
catch (ExceptionType1 type1)
{
 ex = type1;
}
catch (ExceptionType2 type2)
{
 ex = type2;
}
finally
{
 if (ex != null)
 {
 //Log
 }
}
</code></pre>

blocks|key|461137|text|Visual+Basic有一个可用于此目的的构造。从几乎从不失败执行的意义上来说，这并不是真正的“最终”，但当您只想记录您正在处理的异常，并且您可以访问共享代码中的异常对象时，它将支持这种情况。您还可以灵活地让共享代码在单个异常类型代码之前或之后执行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|461138|Try
++++...
Catch+ex+As+Exception+When+TypeOf(ex)+Is+Type1+OrElse+TypeOf(ex)+Is+Type2
++++...
++++If+TypeOf(ex)+Is+Type1+Then
++++++++...
++++ElseIf+TypeOf(ex)+Is+Type2+Then
++++++++...
++++End+If
End+Try|code-block|syntax|javascript|461139|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Visual Basic has a construct that can be used for this. This isn't really "finally" in the sense of [almost] never failing to execute, but it'll support the case when you only want to log the exceptions that you're handling, and you have access to the exception object within the shared code. You've also got the flexibility of having the shared code execute before or after the individual exception type code.



<pre class="lang-vb prettyprint-override"><code>Try
 ...
Catch ex As Exception When TypeOf(ex) Is Type1 OrElse TypeOf(ex) Is Type2
 ...
 If TypeOf(ex) Is Type1 Then
 ...
 ElseIf TypeOf(ex) Is Type2 Then
 ...
 End If
End Try
</code></pre>

blocks|key|461178|text|如下所示，只要该语言具有不带参数的throw，就可以重新抛出捕获的异常：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|461179|try
{

}+catch(Everything)+{
++++try+{
++++++++throw;
++++}+catch+(Exception1+e)+{
++++++++....
++++}+catch+(Exception2+e)+{
++++++++....
++++}+finally+{
++++++++//Perform+action,+such+as+logging
++++}
}+finally+{
++++++++//This+always+occurs+but+I+only+want+to+log+when+an+exception+occurs.
}|code-block|syntax|javascript|461180|这就是说，如果你想在异常发生时记录--如果你只想记录你实际捕获的异常，那么不要把“执行操作”放在finally块中，只要把它放在内部try-catch的末尾即可。|461181|entityMap^0|H|5|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

Something like this, as long as the language has <code>throw</code> with no parameters to rethrow a caught exception:

<pre><code>try
{

} catch(Everything) {
 try {
 throw;
 } catch (Exception1 e) {
 ....
 } catch (Exception2 e) {
 ....
 } finally {
 //Perform action, such as logging
 }
} finally {
 //This always occurs but I only want to log when an exception occurs.
}
</code></pre>

That's if you want to log whenever an exception occurs - if you only want to log the ones you actually catch, then don't put the "Perform action" in a finally block, just put it after the end of the inner try-catch.

blocks|key|2080999|text|将“全局”try/catch放在主程序或高级方法中。这将捕获在其他地方未捕获的所有异常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2081000|try
{
+++++//+Main+method,+or+higher+level+method+call
}+
catch+(Exception+ex)
{
+++++//+Log+exception+here
}|code-block|syntax|javascript|2081001|然后，在从属的try/catch子句中，只需以通常的方式处理异常，然后重新抛出。重新抛出的异常将冒泡到您的主try/catch并被记录下来。|2081002|try
{
+++++//+Do+your+thing
}
catch(SomeException+ex)
{
+++++//+Handle+exception+here

+++++//+rethrow+exception+to+logging+handler+
+++++throw;
}|2081003|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Put a "global" try/catch in your main program or high-level method. This catches all exceptions that are not caught elsewhere.

<pre><code>try
{
 // Main method, or higher level method call
} 
catch (Exception ex)
{
 // Log exception here
}
</code></pre>

Then, in your subordinate try/catch clauses, just handle your exceptions in the usual way, and then rethrow. The rethrown exception will bubble up to your main try/catch and be logged.

<pre><code>try
{
 // Do your thing
}
catch(SomeException ex)
{
 // Handle exception here

 // rethrow exception to logging handler 
 throw;
}
</code></pre>

Is there any language that supports something like the below construct, or is there a good way to achieve this using the ubiquitous try-catch-finally?

<pre><code>try
{

} catch(Exception1 e)
 { .... }
 catch(Exception2 e)
 { .... }
 catch-finally
 {
 //Perform action, such as logging
 }
 finally
 {
 //This always occurs but I only want to log when an exception occurs.
 }
</code></pre>

I understand this depends on the particular language, but is there some such support in Java, C#, C++, PHP etc?

In languages with try-catch-finally, is it somehow possible to perform an action for all exception-handlers?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否有任何语言支持类似下面的构造，或者是否有使用无处不在的try-catch-finally实现这一点的好方法？try{} catch(Exception1 e)  { .... }  catch(Exception2 e)  { .... }  catch-finally   {      //Perform act...

问在带有try-catch-finally的语言中，有没有可能为所有异常处理程序执行操作？
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问在带有try-catch-finally的语言中，有没有可能为所有异常处理程序执行操作？EN