2014.11.25UDP聊天程序

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1.信息发送

<span style="font-size:18px;">package com.hechao;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;/** * UDP信息发送 * @author 何超 * */public class MessageSender {public static void main(String[] args) {DatagramSocket socket = null;//创建数据报套接字try {socket = new DatagramSocket();byte[] buffer = ("何超,你好！").getBytes("GBK");//消息内容转换为字节数组DatagramPacket p = new DatagramPacket(buffer, buffer.length, InetAddress.getByName("192.168.1.115"), 1234);//创建数据发送数据报包socket.send(p);//发送数据报包} catch (IOException e) {e.printStackTrace();}finally{if(socket != null){socket.close();//关闭数据报套接字}}}}</span>

2.信息接收

<span style="font-size:18px;">package com.hechao;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;/** * UDP接收消息 * @author 何超 * */public class MessageReceiver {public static void main(String[] args) {DatagramSocket socket = null;try {socket = new DatagramSocket(1234);byte[] buffer = new byte[256];DatagramPacket p = new DatagramPacket(buffer, buffer.length);while (true) {socket.receive(p);byte[] data = new byte[p.getLength()];System.arraycopy(p.getData(), 0, data, 0, data.length);System.out.println(new String(data, "GBK"));}} catch (IOException e) {e.printStackTrace();} finally {if(socket != null){socket.close();}}}}</span>

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