Java如何使服务器允许连接到套接字端口？

在Java编程中，如何使服务器允许连接到套接字端口？

以下示例显示如何使服务器通过使用ServerSocket类的server.accept()方法和Socket类的sock.getInetAddress()方法来允许连接到套接字端口：`1234。

package com.yiibai;

import java.io.IOException; import java.net.InetAddress; import java.net.ServerSocket; import java.net.Socket; public class ConnectingSocket { public static void main(String[] args) { try { ServerSocket server = new ServerSocket(12345); while (true) { System.out.println("Listening"); Socket sock = server.accept(); InetAddress addr = sock.getInetAddress(); System.out.println("Connection made to " + addr.getHostName() + " (" + addr.getHostAddress() + ")"); pause(5000); sock.close(); } } catch (IOException e) { System.out.println("Exception detected: " + e); } } private static void pause(int ms) { try { Thread.sleep(ms); } catch (InterruptedException e) { } } } 

Java

上述代码示例将产生以下结果 -

Listening
Connection made to 127.0.0.1 (127.0.0.1)
Listening

Shell

客户端代码参考如下 -

package com.yiibai;

import java.io.IOException; import java.net.InetAddress; import java.net.Socket; import java.net.SocketException; import java.net.UnknownHostException; public class SocketClient { public static void main(String[] args) { try { //InetAddress addr = InetAddress.getByName("127.0.0.1"); Socket theSocket = new Socket("127.0.0.1", 12345); System.out.println("Connected to " + theSocket.getInetAddress() + " on port " + theSocket.getPort() + " from port " + theSocket.getLocalPort() + " of " + theSocket.getLocalAddress()); } catch (UnknownHostException e) { System.err.println("I can't find " + e); } catch (SocketException e) { System.err.println("Could not connect to " + e); } catch (IOException e) { System.err.println(e); } } }