基于TCP的Socket通信

1.服务端

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.net.InetAddress;import java.net.ServerSocket;import java.net.Socket;/* * 基于TCP协议的Socket通信，实现用户登陆 * 服务器端 */public class Server {public static void main(String[] args) {try {//1.创建一个服务器端Socket，即ServerSocket，指定绑定的端口，并监听此端口ServerSocket serverSocket=new ServerSocket(8888);Socket socket=null;//记录客户端的数量int count=0;System.out.println("***服务器即将启动，等待客户端的连接***");//循环监听等待客户端的连接while(true){//调用accept()方法开始监听，等待客户端的连接socket=serverSocket.accept();//创建一个新的线程ServerThread serverThread=new ServerThread(socket);//启动线程serverThread.start();count++;//统计客户端的数量System.out.println("客户端的数量："+count);InetAddress address=socket.getInetAddress();System.out.println("当前客户端的IP："+address.getHostAddress());}} catch (IOException e) {e.printStackTrace();}}}

2.客户端：

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.net.Socket;import java.net.UnknownHostException;/* * 客户端 */public class Client {public static void main(String[] args) {try {//1.创建客户端Socket，指定服务器地址和端口Socket socket=new Socket("localhost", 8888);//2.获取输出流，向服务器端发送信息OutputStream os=socket.getOutputStream();//字节输出流PrintWriter pw=new PrintWriter(os);//将输出流包装为打印流pw.write("用户名：alice;密码：789");pw.flush();socket.shutdownOutput();//关闭输出流//3.获取输入流，并读取服务器端的响应信息InputStream is=socket.getInputStream();BufferedReader br=new BufferedReader(new InputStreamReader(is));String info=null;while((info=br.readLine())!=null){System.out.println("我是客户端，服务器说："+info);}//4.关闭资源br.close();is.close();pw.close();os.close();socket.close();} catch (UnknownHostException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}

3.服务器线程处理类

package com.imooc;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.PrintWriter;import java.net.Socket;/* * 服务器线程处理类 */public class ServerThread extends Thread {// 和本线程相关的SocketSocket socket = null;public ServerThread(Socket socket) {this.socket = socket;}//线程执行的操作，响应客户端的请求public void run(){InputStream is=null;InputStreamReader isr=null;BufferedReader br=null;OutputStream os=null;PrintWriter pw=null;try {//获取输入流，并读取客户端信息is = socket.getInputStream();isr = new InputStreamReader(is);br = new BufferedReader(isr);String info=null;while((info=br.readLine())!=null){//循环读取客户端的信息System.out.println("我是服务器，客户端说："+info);}socket.shutdownInput();//关闭输入流//获取输出流，响应客户端的请求os = socket.getOutputStream();pw = new PrintWriter(os);pw.write("欢迎您！");pw.flush();//调用flush()方法将缓冲输出} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{//关闭资源try {if(pw!=null)pw.close();if(os!=null)os.close();if(br!=null)br.close();if(isr!=null)isr.close();if(is!=null)is.close();if(socket!=null)socket.close();} catch (IOException e) {e.printStackTrace();}}}}