UDP
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使用UDP协议编写一个网络程序,设置接收端程序的监听端口是8001,发送端发送的数据是“Hello, world”。
package bzu;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
public class PersonTest {
public static void main(String[] args) throws Exception { // TODO Auto-generated method stub DatagramSocket ds = new DatagramSocket(3000); String str = "Hello World"; DatagramPacket dp = new DatagramPacket(str.getBytes(), str.length(),InetAddress.getByName("localhost"),8001); ds.send(dp); ds.close();}
}
package bzu;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
public class ServerTest {
public static void main(String[] args)throws Exception { // TODO Auto-generated method stub byte[] buf = new byte[1024]; DatagramSocket ds = new DatagramSocket(8001);//定义一个datagramsocket对象,监听的端口8001 DatagramPacket dp = new DatagramPacket(buf, 1024);//用于接收数据 System.out.println("等待接受数据"); ds.receive(dp); String str = new String(dp.getData(), 0, dp.getLength())+"from"+dp.getAddress().getHostAddress()+":"+dp.getPort(); System.out.println(str); ds.close();}
}
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