使用UDP协议控制台模拟客户咨询

客户端代码：

package cn.luoxue.chat1;

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

public class UDPClient {
    public static void main(String[] args) throws IOException {
        Scanner input = new Scanner(System.in);
        //定义服务器的地址，端口号，数据
        InetAddress address = InetAddress.getByName("localhost");
        int port = 8800;
        DatagramPacket packet;
        DatagramPacket packet2;
        //创建DatagramSocket，实现数据发送和接收
        DatagramSocket socket = new DatagramSocket();
        System.out.println("您好，美女小兰为您服务！");
        String str = "";
       while(!str.equals("886")) {
           System.out.print("用户说：");
           str = input.next();
           byte[] data = str.getBytes();
           //创建数据报
           packet = new DatagramPacket(data, data.length, address, port);

           //向服务器端发送数据报
           socket.send(packet);

           //接收服务器响应数据
           byte[] data2 = new byte[1024];
           packet2 = new DatagramPacket(data2, data2.length);
           socket.receive(packet2);
           String info = new String(data2, 0, packet2.getLength());
           System.out.println("客服说："+info);
       }

        socket.close();
    }
}

服务端：

package cn.luoxue.chat1;

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

public class UDPServer {
    public static void main(String[] args) throws IOException {
        DatagramSocket socket = new DatagramSocket(8800);
        DatagramPacket packet = null;
        byte[] data = null;
        int count = 0;
        System.out.println("***客服静候您的咨询***");
        while(true){
            data = new byte[1024];//创建字节数组，指定接收的数据包的大小
            packet = new DatagramPacket(data, data.length);
            socket.receive(packet);//此方法在接收到数据报之前会一直阻塞
            Thread thread = new Thread(new UDPThread(socket, packet));
            thread.start();
            count++;
            System.out.println("服务器端被连接过的次数："+count);
            InetAddress address = packet.getAddress();
            System.out.println("当前客户端的IP为："+address.getHostAddress());

        }

    }
}

多线程代码：

package cn.luoxue.chat1;

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

public class UDPThread implements Runnable{

    DatagramSocket socket = null;
    DatagramPacket packet = null;

    public UDPThread(DatagramSocket socket,DatagramPacket packet) {
        this.socket = socket;
        this.packet = packet;
    }

    @Override
    public void run() {
        String info = null;
        InetAddress address = null;
        int port = 8800;
        byte[] data2 = null;
        DatagramPacket packet2 = null;
        try {
            info = new String(packet.getData(), 0, packet.getLength());
            System.out.println("我是服务器，客户端说："+info);

            address = packet.getAddress();
            port = packet.getPort();
            if(info.equals("886")){
                data2 = "好的，回聊".getBytes();
            }else if(info.equals("美女你好问个问题")){
                data2 = "先生，你想问什么呢".getBytes();
            }else if(info.equals("你认为谁最帅")){
                data2 = "那还用说，当然是小军了，人家小军玉树临风、一表人才，简直帅的掉渣！".getBytes();
            }else if(info.equals("那你认为谁最美")){
                data2 = "毫无争议绝对是小举，人家小举闭月羞花、天生丽质，美的不要不要的！".getBytes();
            }else if(info.equals("谁俩更般配呢")){
                data2 = "你懂的".getBytes();
            }else{
                data2 = "你说啥？风大听不到！".getBytes();
            }

            packet2 = new DatagramPacket(data2, data2.length, address, port);
            socket.send(packet2);
        } catch (IOException e) {
            e.printStackTrace();
        }
        //socket.close();不能关闭
    }

}

代码参考自：http://www.cnblogs.com/zhaozihan/archive/2016/11/12/6057118.html