简单的Socket通信的实现

import java.net.*; import java.io.*; public class SocketServerDemo { int port = 2345; ServerSocket serverSocket; public SocketServerDemo() { try { serverSocket = new ServerSocket(port); System.out.println("start server at port " + port); while(true) { Socket client = serverSocket.accept(); System.out.println("Connect: " + client.getInetAddress()); DataInputStream in = new DataInputStream(client.getInputStream()); DataOutputStream out = new DataOutputStream(client.getOutputStream()); byte[] message = "Connect ok.This message is from server.".getBytes(); out.write(message,0,message.length); byte[] buf = new byte[1024]; in.read(buf); System.out.println(new String(buf)); } } catch(IOException ex) { ex.printStackTrace(); } } public static void main(String[] args) { new SocketServerDemo(); } }