TCP实现聊天

TCP

TCP实现聊天

服务端

package com.zr.lesson02;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

//服务端
public class TcpServerDemo01 {

    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = null;//提升作用域
        Socket socket = null;
        InputStream is = null;
        ByteArrayOutputStream baos = null;
        try {
            //需有一个地址
            serverSocket = new ServerSocket(9999);
            //等待客户端连接
            socket = serverSocket.accept();
            //读取客户端的消息
            is = socket.getInputStream();
            //管道流
            baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len;
            while ((len=is.read(buffer))!=-1){
               baos.write(buffer,0,len);
            }
            System.out.println(baos.toString());

            /*bytes[] buffer = new bytes[1024];
            int len;
            while((len=is.read(buffer))!=-1){
                StringBuffer msg = new StringBuffer(buffer,0,len);
                System.out.println(msg);
            }
            */
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //关闭资源
            if (baos!=null){
                try {
                    baos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (is!=null){
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket!=null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (serverSocket!=null){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

客户端

package com.zr.lesson02;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

//客户端
public class TcpClientDemo01 {
    public static void main(String[] args) {
        Socket socket = null;
        OutputStream os = null;
        //要有服务器的地址
        try {
            //获取服务器地址 端口号
            InetAddress serverIP = InetAddress.getByName("127.0.0.1");
            int port = 9999;
            //创建一个Socket连接
            socket = new Socket(serverIP,port);
            //发送消息
            os = socket.getOutputStream();
            os.write("你好，欢迎你!".getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if (socket!=null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (os!=null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}