利用UDPSocket模拟一次对话,只能运行依次,多次执行还在测试中.跪求大神建议....

来源：互联网发布：windows 串口编程编辑：程序博客网时间：2024/05/04 07:14

菜鸟一枚,简单直接进入主题,想请教各位大神给些建议,好自我更新....................

UDPSocketServer 类模拟服务端,代码:

package com.bzu.udpsocket;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.util.Scanner;public class UDPSocketServer {/** * 先接收再发送 * @param args * @throws IOException  */public static void main(String[] args) throws IOException {Scanner input=new Scanner(System.in);//先接收DatagramSocket socket=new DatagramSocket(9000);byte [] buff=new byte[100];DatagramPacket packet=new DatagramPacket(buff, buff.length);socket.receive(packet);//接收数据包System.out.println(new String(buff,0, packet.getLength()));//返回数据到客户端System.out.println("请输入回复消息:");String str=input.nextLine();DatagramPacket packet2=new DatagramPacket(str.getBytes(), str.length(), packet.getAddress(), packet.getPort());socket.send(packet2);socket.close();}}

UDPSocketClient类模拟客户端,代码:

package com.bzu.udpsocket;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;import java.util.Scanner;public class UDPSocketClient {/** * 假设本为客户端:先发送,再接收 * @throws IOException  */public static void main(String[] args) throws IOException {Scanner input=new Scanner(System.in);DatagramSocket socket=new DatagramSocket();//无参,随机生成一个端口号System.out.println("请输入要发信息:");String str=input.nextLine();//封装对象为packet//参数1:将字符转换成字节.参数2:字符长度.参数3:在给定主机名的情况下确定主机的 IP 地址.参数4:端口号DatagramPacket packet=new DatagramPacket(str.getBytes(), str.length(), InetAddress.getByName("localhost"), 9000);socket.send(packet);//发送数据包byte [] buff=new byte[100];DatagramPacket packet2=new DatagramPacket(buff, buff.length);socket.receive(packet2);//接收数据包System.out.println(new String(buff,0,packet2.getLength()));socket.close();}}

测试结果如附加图片

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