有意思的题目－socket编程

1，用socket通讯写出客户端和服务器端的通讯，要求客户发送数据后能够回显相同的数据

server端

package socket;

import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketServer
{
    public static void main(String[] args)
    {
        try
        {
            ServerSocket server = new ServerSocket(9090);
            System.out.println("启动一个新的server。。。。。。。。。。。");
            Socket socket = null;
            while (true)
            {
                System.out.println("开始接受数据。。。。。。。。。。");
                socket = server.accept();
                InputStream in = socket.getInputStream();
                OutputStream out = socket.getOutputStream();
                int i = 0;
                while ((i = in.available()) != 0 && i != -1)
                {
                    System.out.print(i);
                    out.write(in.read());
                }
                in.close();
                out.close();
            }
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

 客户端 ：

package socket;

import java.io.InputStream;
import java.net.Socket;

public class SocketClient
{
    public static void main(String[] args)
    {
        try
        {
            Socket client = new Socket("127.0.0.1", 9090);
            String s = "你好，我是客户端";
            client.getOutputStream().write(s.getBytes("UTF-8"));
            Thread.sleep(100);
            InputStream in = client.getInputStream();
            byte[] att = new byte[in.available()];
            in.read(att);
            String str = new String(att);
            System.out.println(str);
        }
        catch (Exception e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
}