使用服务器套接字后如何关闭端口

本文介绍了使用服务器套接字后如何关闭端口的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在我的应用程序中，我创建一个带有某些端口的 ServerSocket 实例.完成后，我关闭了套接字，但是当我尝试在同一端口上创建新的 ServerSocket 时，它将抛出:

In my application I create a ServerSocket instance with some port. After I am finished, I close the socket, but when I try to make a new ServerSocket on the same port, it throws:

"java.BindException: Address already in use"

如果我使用其他端口创建 ServerSocket ，那么它将起作用.

If I create the ServerSocket with a different port, then it works.

ServerSocket.isClosed 也返回true

出什么问题了?

public void run() { try { BufferedInputStream bufferedinputstream = new BufferedInputStream( new FileInputStream(fileReq)); BufferedOutputStream outStream = new BufferedOutputStream( cs.getOutputStream()); byte buffer[] = new byte[1024]; int read; System.out.println(cs); while ((read = bufferedinputstream.read(buffer)) != -1) { outStream.write(buffer, 0, read); outStream.flush(); } System.out.println("File transfered"); outStream.close(); bufferedinputstream.close(); try { this.finalize(); } catch (Throwable e) { // TODO Auto-generated catch block e.printStackTrace(); } } catch (Exception e) { System.out.println("Exce...."); System.out.println(e.getMessage()); } finally { if ( cs != null) try { int usedPort=cs.getLocalPort(); System.out.println("Closing "+cs); cs.close(); System.out.println(cs+" Closed"); System.out.println("asd"+cs.isClosed()); portManager.getInstance().mp.put(usedPort,true); } catch (IOException e) { System.err.println("in sendToClient can't close sockt"); System.err.println(e.getMessage()); } }

推荐答案

您是否尝试过在服务器套接字上调用 setReuseAddress(true)?TCP状态机进入 TIME_WAIT 状态是正常的.有关详细说明，请此处.

Have you tried calling setReuseAddress(true) on the server socket? It's normal for the TCP state machine to enter TIME_WAIT state. For detailed explanation look here.