UDP傳輸優化

UDP傳輸優化

• 接收端Receive

package com.heima.socket;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class Demo02_Receive {
	public static void main(String[] args) throws IOException {
		DatagramSocket socket = new DatagramSocket(6666); // 創建Socket相當於創建碼頭
		DatagramPacket packet = new DatagramPacket(new byte[1024], 1024);// 創建Packet相當於創建集裝箱
		while (true) {
			socket.receive(packet); // 接貨,接收數據

			byte[] arr = packet.getData(); // 獲取數據
			int len = packet.getLength(); // 獲取有效的字節個數
			String ip = packet.getAddress().getHostAddress(); // 獲取ip地址
			int port = packet.getPort(); // 獲取端口號
			System.out.println(ip + ":" + port + ":" + new String(arr, 0, len));
		}
	}
}

• 發送端Send

package com.heima.socket;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Scanner;

public class Demo02_Send {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in); // 創建鍵盤錄入對象
		DatagramSocket socket = new DatagramSocket(); // 創建Socket相當於創建碼頭

		while (true) {
			String line = sc.nextLine(); // 獲取鍵盤錄入的字符串
			if ("quit".equals(line)) {
				break;
			}
			DatagramPacket packet = // 創建Packet相當於集裝箱
			new DatagramPacket(line.getBytes(), line.getBytes().length,
					InetAddress.getByName("127.0.0.1"), 6666);
			socket.send(packet); // 發貨,將數據發出去
		}
		socket.close();
	}
}