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; 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(); } } }
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.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(); } } }
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Socket Socket 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 block e.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(); } } } }