TCP socket

 

package com.iport.base.enterprise.web.view;


import org.apache.log4j.net.SocketServer;
import org.apache.log4j.net.SocketServer;

import java.io.*;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * 基于TCP协议的Socket通信，实现用户登录
 */
public class Server {
    public static void main(String[] args) {

        try {
            //创建一个服务器端socket，即ServerSocket,指定绑定的端口，并监听此端口客户端
            ServerSocket socketServer = new ServerSocket(8888);
            Socket socket = null;
            int count = 0;
            System.out.println("****服务器即将启动，等待用户接入****");
            while (true){

                socket = socketServer.accept();
                ServerThread serverThread = new ServerThread(socket);
                serverThread.start();
                count++;
                System.out.println("客户端数量："+count);
                InetAddress address = socket.getInetAddress();
                System.out.println("客户duan:"+address.getHostAddress());
            }

        } catch (IOException e) {
            e.printStackTrace();
        }


    }
}

 

package com.iport.base.enterprise.web.view;

import java.io.*;
import java.net.Socket;

/**
 * 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：admin;密码：123");
            pw.write("用户名：tom;密码：456");
            pw.flush();

            socket.shutdownOutput();//关闭输出流


            //接收
            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："+info);
            }
            //关闭资源
            br.close();
            is.close();
            pw.close();
            os.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

 多线程：

package com.iport.base.enterprise.web.view;


import java.io.*;
import java.net.Socket;

/**
 * 服务器线程处理类
 */
public class ServerThread extends Thread {
    //
    Socket socket = null;
    public ServerThread(Socket socket){
        this.socket = socket;
    }
    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();
            //字节流改为字符流
            isr = new InputStreamReader(is);
            //为输入流添加缓冲
            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

            os = socket.getOutputStream();
            pw = new PrintWriter(os);
            pw.write("欢迎您！");
            pw.flush();


        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //关闭资源
            try {
                if (pw != null) {
                    pw.close();
                }
                if (os != null) {
                    os.close();
                }
                if (br != null) {
                    br.close();
                }
                if (is != null) {
                    is.close();
                }
                if (socket != null) {
                    socket.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}