多线程socket编程--聊天程序

一、好久没写网络编程代码，今天有空，复习一下。下面主要实现服务器端和客户端端通信，服务器端接受一个客户端就启动一个新线程处理，读写也用线程实现，其中读，一个只读10个字节，循环读取输入流。好，废话少说，上代码。

1、服务器端：

package com.ppt.socket;

import java.net.ServerSocket;
import java.net.Socket;
/*
 * 服务端
 */
public class Server {

	private int port = 9999;
	private ServerSocket server;
	private static Socket socket;
	
	public Server() {
		try {
			init();
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
	private void init() throws Exception {
		server = new ServerSocket(port);
		System.out.println("server socket is start, port is: " + port);
		while(true) {
			socket = server.accept();
			handle(socket);
		}
	}
	private void handle(Socket socket) throws Exception {
		String key = socket.getInetAddress().getHostAddress()+":"+socket.getPort();
		System.out.println("accept a socket: " + key);
		Thread thread = new Thread(new ThreadSocket(socket));
		thread.start();
	}
	
	public static void main(String[] args) throws Exception {
		Server server = new Server();
	}
}

2、客户端：

package com.ppt.socket;

import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;

/**
 * 客户端
 * @author aa
 *
 */
public class Client {

	private String ip = "127.0.0.1";
	private int port = 9999;
	private static Socket socket;
	
	
	public Client() {
		try {
			init();
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
	
	private void init() throws Exception {
		System.out.println("init the socket client");
		socket = new Socket();
		socket.setSoTimeout(0);
		SocketAddress addr = new InetSocketAddress(ip, port);
		socket.connect(addr);
	}
	public void handle() throws Exception{
		Thread threadRead = new Thread(new ThreadRead(socket.getInputStream()),"SERVER_"+socket.getPort());
		Thread threadwrite = new Thread(new ThreadWrite(socket.getOutputStream()));
		threadRead.start();
		threadwrite.start();
	}
	
	
	public static void main(String[] args) throws Exception {
		Client client = new Client();
		client.handle();
	}

}

3、服务器处理socket线程：

package com.ppt.socket;

import java.net.Socket;
/**
 * 一个socket，一个线程
 * @author aa
 *
 */
public class ThreadSocket implements Runnable {

	private Socket socket;
	
	public ThreadSocket(Socket socket) {
		this.socket = socket;
	}
	
	public void run() {
		try {
			Thread threadRead = new Thread(new ThreadRead(socket.getInputStream()),"CLIENT_"+socket.getPort());
			Thread threadwrite = new Thread(new ThreadWrite(socket.getOutputStream()));
			threadRead.start();
			threadwrite.start();
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
}

4、读取输入流线程：

package com.ppt.socket;

import java.io.InputStream;


public class ThreadRead implements Runnable {

	private static int HEAD_SIZE = 5;//传输最大字节长度--99999
	private static int BUFFER_SIZE = 10;//每次读取10个字节，循环读取输入流--测试，所以读10个字节
	private InputStream is;
	
	public ThreadRead(InputStream is) {
		this.is = is;
	}

	public void run() {
		try {
			while(true) {
				boolean flag = true;
				int msgLength = 0;
				int recvSize = -HEAD_SIZE;
				byte[] buf = new byte[BUFFER_SIZE];
				StringBuffer sb = new StringBuffer();
				while(msgLength > recvSize) {
					int length = is.read(buf,0,BUFFER_SIZE);
					recvSize += length;
					if(flag) {
						String str = new String(buf,0,HEAD_SIZE);
						msgLength = Integer.parseInt(str);
						sb.append(new String(buf,HEAD_SIZE,length-HEAD_SIZE));
						flag = false;
					} else {
						sb.append(new String(buf,0,length));
					}
				}
				System.out.println(Thread.currentThread().getName() +": "+ sb.toString());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
}

5、发送数据线程：

package com.ppt.socket;

import java.io.OutputStream;
import java.util.Scanner;

public class ThreadWrite implements Runnable {

	private static int HEAD_SIZE = 5;//传输最大字节长度--99999
	private OutputStream os;
	
	public ThreadWrite(OutputStream os) {
		this.os = os;
	}
	
	public void run() {
		try {
			Scanner scan = new Scanner(System.in);
			while(true) {
				String sendMsg = scan.next();
				sendMsg = getMsg(sendMsg);
				os.write(sendMsg.getBytes());
				os.flush();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * @param msg--组转发送字符串，首五个字符是字符串长度，不够五位，用0补足
	 * @return
	 */
	private static String getMsg(String msg) {
		int length = String.valueOf(msg.length()).length();
		String slen = "";
		if(length < HEAD_SIZE) {
			StringBuffer sb = new StringBuffer();
			for(int i=0; i

6、至此，一个简单的多线程socket通信就完成了，够简单吧。