udpservertest.java

来自「Java 2实用编程百例,一些比较实用的J2SE小程序,可以通过这些程序熟悉JA」· Java 代码 · 共 32 行

package ch07.section05;

import java.io.*;
import java.net.*;

public class UDPServerTest {
  static public void main(String args[]) {
    try {
      DatagramSocket receiveSocket = new DatagramSocket(3245);
      byte buf[] = new byte[1000];
      DatagramPacket receivePacket = new DatagramPacket(buf, buf.length);
      System.out.println("开始接受数据：");
      while (true) {
        receiveSocket.receive(receivePacket);
        String name = receivePacket.getAddress().toString();
        System.out.println("\n来自主机：" + name + "\n端口："
                           + receivePacket.getPort());
        String s = new String(receivePacket.getData(), 0,
                              receivePacket.getLength());
        System.out.println("接受到的数据是: " + s);
      }
    }
    catch (SocketException e) {
      e.printStackTrace();
      System.exit(1);
    }
    catch (IOException e) {
      System.out.println("网络通讯出现错误，问题在" + e.toString());
    }
  }
}