package demo01; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; public class UDPrecieve { public static void main(String[] args) throws IOException { // 接收端(单线上传)b // 1.创建码头,绑定端口号 DatagramSocket ds = new DatagramSocket(8000); // 2.创建字节数组,接收发来的数据 byte[] b = new byte[1024]; // 3.创建数据包对象 DatagramPacket dp = new DatagramPacket(b, b.length); // 4.接收数据 ds.receive(dp); // 5.拆包 int len = dp.getLength(); String ip = dp.getAddress().getHostAddress(); int port = dp.getPort(); System.out.println("ip:" + ip + "端口号:" + port + "内容:" + new String(b, 0, len)); // 6.释放资源 ds.close(); } }
package demo01; import java.io.IOException; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; import java.net.SocketException; import java.net.UnknownHostException; public class UDPSend { // 发送端(单线上传) public static void main(String[] args) throws IOException { // 1.创建数据包对象,封装要发送的数据,接收端的IP,接收端的接口 byte[] b = "你好".getBytes(); InetAddress inet = InetAddress.getLocalHost(); DatagramPacket dp = new DatagramPacket(b, b.length, inet, 8000); // 2.创建码头对象,进行数据包的发送 DatagramSocket ds = new DatagramSocket(); ds.send(dp); // 3.关闭资源 ds.close(); } }
package demo01;
import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;
public class UDPrecieve {public static void main(String[] args) throws IOException {// 接收端(单线上传)b// 1.创建码头,绑定端口号DatagramSocket ds = new DatagramSocket(8000);// 2.创建字节数组,接收发来的数据byte[] b = new byte[1024];// 3.创建数据包对象DatagramPacket dp = new DatagramPacket(b, b.length);// 4.接收数据ds.receive(dp);// 5.拆包int len = dp.getLength();String ip = dp.getAddress().getHostAddress();int port = dp.getPort();System.out.println("ip:" + ip + "端口号:" + port + "内容:" + new String(b, 0, len));// 6.释放资源ds.close();}
}
来源:https://www.cnblogs.com/Jxliu/p/9253202.html