文章标题

package network;
import java.io.DataInputStream;
import java.net.*;
public class Tcpserver {

    public static void main(String[] args) throws Exception{
        // TODO Auto-generated method stub
        ServerSocket ss=new ServerSocket(8002);
        while(true)
        {
            Socket s=ss.accept();
            System.out.println("A client connect");
            DataInputStream dis = new DataInputStream(s.getInputStream());
            System.out.println(dis.readUTF());
            dis.close();
            s.close();
        }
    }

}


package network;
import java.io.DataOutputStream;
import java.io.OutputStream;
import java.net.*;
import java.rmi.server.SocketSecurityException;
public class TCPclient {

    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        Socket s =new Socket("127.0.0.1",8002);
        OutputStream os =s.getOutputStream();
        DataOutputStream dos=new DataOutputStream(os);
        dos.writeUTF("hello world");
        dos.flush();
        dos.close();
        s.close();
    }

}