java NIO GNU实现，read的时候如果throw exception的不通

 

client = (SocketChannel) selectionKey.channel();

if(client.isConnected())

System.out.println("connect ok");

else

{

System.out.println("connect NOT ok");

selectionKey.cancel();

try {

selectionKey.channel().close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

//将缓冲区清空以备下次读取

receivebuffer.clear();

//读取服务器发送来的数据到缓冲区中

try {

count = client.read(receivebuffer);

} catch (IOException e) {

System.out.println("Exception");

// TODO Auto-generated catch block

selectionKey.cancel();

try {

selectionKey.channel().close();

} catch (IOException e2) {

// TODO Auto-generated catch block

e2.printStackTrace();

}

}

 

 

在x86上，如果客户端按CTRL+C终止，则会在下一个Exception

在Mips上，如果客户端按CTRL+C终止，则会在上一个Exception

 

 

Exception in thread "main" java.nio.channels.NotYetConnectedException

   at gnu.java.nio.SocketChannelImpl.read(SocketChannelImpl.java:217)

   at net.tsong.javanio.NIOServer.handleKey(NIOServer.java:122)

   at net.tsong.javanio.NIOServer.listen(NIOServer.java:62)

   at net.tsong.javanio.NIOServer.main(NIOServer.java:192)

#

 

 

实现代码：SocketChannelImpl.java:217 

 

 

  public int read(ByteBuffer dst) throws IOException

  {

    if (!isConnected())

      throw new NotYetConnectedException();

   

    return channel.read(dst);

  }

   

 

 

由此可见，GNU的classpath在read之前会判断是否isConnected

SUN java应该没有判断