socket closed异常形成原因

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多个线程中的一个如果调用了socket.close()方法，其他线程在进行读/写时会出现socket close异常，例如：

java.net.SocketException: socket closed

at java.net.SocketInputStream.socketRead0(Native Method)

at java.net.SocketInputStream.read(SocketInputStream.java:129)

at java.net.SocketInputStream.read(SocketInputStream.java:90)

at server. UserListener .run(UserListener.java:36)

at java.lang.Thread.run(Thread.java:662)

下面是对应的代码，父线程在执行完任务后sock.close()关闭了socket，导致south线程中uin（sock的InputStream）运行read()方法时出现socket close异常：

父线程：

uin = sock.getInputStream(); uout = sock.getOutputStream(); Runnable south = new UserListener (uin, nos); new Thread(south, "south").start(); ... sock.close();

south线程：

public class UserListener implements Runnable { @Override public void run() { ... recv = uin.read(buf); //异常抛出点 ...

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