TCP实现聊天

TCP实现聊天

客户端

1.连接服务器 Socket

2.发送消息

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;
        //1.要知道服务器的地址
        try {
            InetAddress serverIP=InetAddress.getByName("127.0.0.1");
            //2.端口号
            int port=9999;
            //3.创建一个socket连接
            socket=new Socket(serverIP,port);
            //4.发送消息IO流
            os=socket.getOutputStream();

            os.write("你好，郝雨霏".getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if(os!=null){
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket!=null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

服务端

1.建立服务的端口 ServerSocket

2.等待用户的连接 accept

3.接收用户的消息

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) {
        ServerSocket serverSocket=null;
        Socket socket=null;
        InputStream is=null;
        ByteArrayOutputStream baos=null;
        try {
            //1.我得有一个地址
            serverSocket = new ServerSocket(9999);
            //2.等待客户端连接过来
            socket=serverSocket.accept();
            //3.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());


        } 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();
            }
        }


        }
    }
}

结果展示：