服务端代码:

package com.bobohe.socket;

import java.io.*;
import java.net.*; class UDPServer {
public static void main(String[] args) throws IOException {
DatagramSocket server = new DatagramSocket(5050);
byte[] recvBuf = new byte[100];
DatagramPacket recvPacket = new DatagramPacket(recvBuf, recvBuf.length);
server.receive(recvPacket);
String recvStr = new String(recvPacket.getData(), 0,
recvPacket.getLength());
System.out.println("Hello World!" + recvStr);
int port = recvPacket.getPort();
InetAddress addr = recvPacket.getAddress();
String sendStr = "Hello ! I'm Server";
byte[] sendBuf;
sendBuf = sendStr.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendBuf, sendBuf.length,
addr, port);
server.send(sendPacket);
server.close();
}
}

客户端代码:

package com.bobohe.socket;

import java.io.*;
import java.net.*;
class UDPClient{
public static void main(String[] args)throws IOException{ DatagramSocket client = new DatagramSocket(); String sendStr = "Hello! I'm Client";
byte[] sendBuf;
sendBuf = sendStr.getBytes();
InetAddress addr = InetAddress.getByName("127.0.0.1");
int port = 5050;
DatagramPacket sendPacket = new DatagramPacket(sendBuf ,sendBuf.length , addr , port);
//发送数据
client.send(sendPacket);
byte[] recvBuf = new byte[100];
DatagramPacket recvPacket
= new DatagramPacket(recvBuf , recvBuf.length);
//接收数据
client.receive(recvPacket);
String recvStr = new String(recvPacket.getData() , 0 ,recvPacket.getLength());
System.out.println("收到:" + recvStr);
client.close();
}
}
05-08 15:23