Tcp网络编程 单向通讯

package www;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
        //客户机端，向服务器发送一串字符串    
public class TestTcpC {
    public static void main(String[] args) throws UnknownHostException, IOException {
        //建立TCp的服务
        Socket s = new Socket(InetAddress.getLocalHost(),9000);
        //获取到Socket的输出流
        OutputStream outputStream = s.getOutputStream();
        //利用输出流对象把数据写出
        outputStream.write("服务器端，你好".getBytes());
        s.close();
    }
}

package com.oracle.www;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
        //服务器端，接受客户机发送的消息并输出  
public class TestTcpS {

    public static void main(String[] args) throws IOException {
        //建立Tcp的服务端，并侦听一个端口
        ServerSocket serverSocket = new ServerSocket(9000);
        //接受客户端的连接
        Socket socket = serverSocket.accept();
        //获取输入流对象，读取客户端发送的内容
        InputStream inputStream = socket.getInputStream();
        byte [] buf = new byte[1024];
        int length = 0;
        length = inputStream.read(buf);
        System.out.println(new String(buf, 0, length));
        //关闭资源
        serverSocket.close();
        socket.close();
        inputStream.close();
    }

}