如何知道Java Socket已经死了(how to know a Java Socket is dead)

 我在客户端应用程序中使用Java Socket对象。 我需要知道服务器的线路何时断开，或者是否有任何事件导致套接字死机。 
 
 我看到两种方法： 
 
 
 
 在写入或读取套接字时捕获SocketException，考虑到这些异常会终止套接字 
 
 
 捕获这些异常时，检查Socket.isClosed（）方法以确定它是否杀死了套接字 
 
 
 这些方法中的任何一种都能保证我知道套接字何时死机并且不会再次工作，即使线路上的临时问题已经解决了吗？ 我们可以除了在套接字上的操作期间抛出的（Socket）异常暗示套接字已经死了吗？ 
 
 知道这个有更好的方法吗？ 

I use a Java Socket object in my client application. I need to know when the line to the server is broken, or if any event caused the socket to be dead.
 
I see two methods:
 
 
 
catching SocketException when writing in or reading from the socket, considering these exceptions kill the socket
 
 
when catching these exceptions, checking the Socket.isClosed() method to know if it killed the socket
 
 
Does any of these methods guarantee I'll know when the socket is dead and won't work again, even if a temporary problem on the line is solved? Can we except a (Socket)Exception thrown during an operation on a socket to imply the socket is dead?
 
Is there a better method to know this?

原文：https://stackoverflow.com/questions/2055650