簡單的Socket通訊

client端：

import java.io.BufferedReader;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;public class Client {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubtry {Socket socket=new Socket("10.0.11.204", 8804);OutputStream out=socket.getOutputStream();DataOutputStream ou=new DataOutputStream(out);BufferedReader br=new BufferedReader(new InputStreamReader(System.in));ou.writeUTF(br.readLine());InputStream in=socket.getInputStream();DataInputStream di=new DataInputStream(in);System.out.println(di.readUTF());} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

ServerSocket端（持續監聽，輸入bye取消連接埠監聽）：

import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;public class server {/** * @param args * @throws IOException  */public static void main(String[] args) throws IOException {// TODO Auto-generated method stubServerSocket server=new ServerSocket(8804);String a="";do{Socket socket=server.accept();DataInputStream in=new DataInputStream(socket.getInputStream()); a=in.readUTF();System.out.println(a);DataOutputStream out=new DataOutputStream(socket.getOutputStream());out.writeUTF(a+":sssss");}while(!a.equals("bye"));}}

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ServerSocket端（多線程持續監聽）：

import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;public class ServletSocket extends ServerSocket{private static int PORT=8906;public ServletSocket() throws IOException {super(PORT);// TODO Auto-generated constructor stubwhile(true){Socket socket=accept();new ServerThread(socket);}}}

import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.Socket;public class ServerThread extends Thread{/** * @param args * @throws IOException  */private Socket client;private DataInputStream in;private DataOutputStream out;public ServerThread(Socket socket) throws IOException{client=socket;in=new DataInputStream(socket.getInputStream());out=new DataOutputStream(socket.getOutputStream());start();}public static void main(String[] args) throws IOException {// TODO Auto-generated method stubnew ServletSocket();}@Overridepublic void run() {// TODO Auto-generated method stubtry {System.out.println(in.readUTF());} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}try {out.writeUTF("welcome");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}try {client.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

代碼缺點：無法取消監聽的連接埠。