本文實例為大家分享了Java網絡編程UDP協議發送接收數據的具體代碼，供大家參考，具體內容如下

A：創建發送端socket對象；

B：創建數據，并把數據打包；

C：調用socket對象的發送方法發送數據包；

D：釋放資源

package net; import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress; public class SendDemo { public static void main(String[] args) throws IOException { //A DatagramSocket ds = new DatagramSocket(); //B byte[] by = 'Hello,UDP'.getBytes(); int length = by.length; InetAddress addr = InetAddress.getByName('192.168.1.22'); int port = 10010; DatagramPacket dp = new DatagramPacket(by, length, addr, port); //C ds.send(dp); //D ds.close(); }}UDP協議接收數據步驟

A：創建接收端socket對象；

B：創建一個數據包（接收容器）；

C：調用socket對象的接收方法接收數據；

D：解析數據，顯示到控制臺；

E：釋放資源

package net; import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress; public class ReceiveDemo { public static void main(String[] args) throws IOException { //A DatagramSocket ds = new DatagramSocket(10010); //B byte[] by = new byte[1024]; int length = by.length; DatagramPacket dp = new DatagramPacket(by, length); //C ds.receive(dp); //D //獲取對方ip InetAddress addr = dp.getAddress(); String ip = addr.getHostAddress(); byte[] by2 = dp.getData(); int len = by2.length; String s = new String(by2, 0, len); System.out.println(ip+'發送的數據是：'+s); //E ds.close(); }}

先運行接收端代碼，再運行發送端代碼。

package net; import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress; public class SendDemo { public static void main(String[] args) throws IOException { //A DatagramSocket ds = new DatagramSocket(); //數據來自鍵盤錄入 BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String line = null; while((line = br.readLine()) != null){ //當輸入jieshu時，結束 if('jieshu'.equals(line)){ break; } //B byte[] by = line.getBytes(); int length = by.length; InetAddress addr = InetAddress.getByName('192.168.1.22'); int port = 10010; DatagramPacket dp = new DatagramPacket(by, length, addr, port); //C ds.send(dp); } //D ds.close(); }}

package net; import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress; public class ReceiveDemo { public static void main(String[] args) throws IOException { //A DatagramSocket ds = new DatagramSocket(10010); //多次接受版本 while(true){ //B byte[] by = new byte[1024]; int length = by.length; DatagramPacket dp = new DatagramPacket(by, length); //C ds.receive(dp); //D //獲取對方ip InetAddress addr = dp.getAddress(); String ip = addr.getHostAddress(); byte[] by2 = dp.getData(); int len = by2.length; String s = new String(by2, 0, len); System.out.println(ip+'發送的數據是：'+s); } //E //ds.close(); }}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。