java网络编程– Tcp聊天

客户端

package cn.usts.edu.lesson02;

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

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");
            int port=9999;
            socket = new Socket(ServerIP, port);//建立一个插座
            os = socket.getOutputStream();
            os.write("第一个tcp聊天室".getBytes());

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


        if (socket!=null){
            try {
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (os!=null){
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

服务端

package cn.usts.edu.lesson02;


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

public class TcpServerDemo01 {
    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket socket = null;
        InputStream inputStream = null;
        ByteArrayOutputStream byteArrayOutputStream = null;

        // 1*首先得先有一个地址,让被人连过来
        try {
            // serverSocket默认开启服务的主机,当前的ip地址为服务器地址,所以只需要个端口号
            serverSocket = new ServerSocket(9999);
            while (true){
                socket = serverSocket.accept();// 监听  监听接受到socket就是连接上来的socket
                inputStream = socket.getInputStream();
                // 读取消息
            /*  获取超过1024个字节的中文就容易产生乱码
            InputStream inputStream = socket.getInputStream();
            byte[] buffer =new byte[1024];
            int len;
            // 从输入流读取一些字节数，并将它们存储到缓冲区b 。 实际读取的字节数作为整数返回。
            while ((len=inputStream.read(buffer))!=-1){
                String msg = new String(buffer, 0, len);
                System.out.println(msg);
            }  */
                byteArrayOutputStream = new ByteArrayOutputStream();
                int len;
                byte[] buffer = new byte[1024];
                while ((len=inputStream.read(buffer))!=-1){
                    byteArrayOutputStream.write(buffer,0,len);
                }
                System.out.println(byteArrayOutputStream.toString());
            }

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

        if (byteArrayOutputStream!=null){
            try {
                byteArrayOutputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (inputStream!=null){
            try {
                inputStream.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();
            }
        }
    }
}