java-----C/S编程----模拟手机业务办理

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一、协议信息：用端口来实现

package org.Socket;public interface BusinessProtocal
{static final int PAY_BILL = 1;static final int ROAMING_SERVER = 2;public void payBill();public void roamingServer();
}

二、服务器端代码

package org.Socket;
import java.io.*;
import java.net.Socket;
import java.net.ServerSocket;public class MobileServer implements BusinessProtocal
{ServerSocket server = null;//定义服务器端套接字Socket socket = null;//定义正在连接服务器的客户端的套接字String str;//记录客户漫游地点int fee;//记录客户缴费金额int serviceID;//客户端业务识别标志DataInputStream in;//来自客户端的输入流DataOutputStream out;//发送到客户端的输出流MobileServer(){try{server = new ServerSocket(6789);//绑定端口号，最好大于1024}catch (IOException e){System.out.println(e);}while(true)//使服务器端一直处于监视状态{try{System.out.println("服务员准备就绪，等待客户请求。。。");socket = server.accept();//堵塞状态，除非有客户连接out = new DataOutputStream(socket.getOutputStream());//重点in = new DataInputStream(socket.getInputStream());//重点while (true){serviceID = in.readInt();switch (serviceID){case PAY_BILL:payBill();break;case ROAMING_SERVER:roamingServer();break;}}}catch (Exception e){System.out.println("客户"+socket.getInetAddress().getHostName()+"业务办理完毕，已经离开。。。");}}}public void payBill(){try{fee = in.readInt();//读取客户端输出流的数据System.out.println("正在处理客户"+socket.getInetAddress().getHostName()+"预交的"+fee+"元话费的请求。。。");Thread.sleep(1000);System.out.println("交费处理完毕");out.writeUTF("尊敬的客户，你已经成功预交了"+fee+"元话费");//向客户端写入字符窜，客户端的输入流来接受此字符串out.flush();//刷新输出缓冲区}catch (Exception e){}}public void roamingServer(){try{str = in.readUTF();System.out.println("正在处理用户"+socket.getInetAddress().getHostName()+"将手机漫游到"+str+"的请求。。。");out.writeUTF("尊敬的用户，您的手机已经成功漫游到"+str+"了");Thread.sleep(1000);System.out.println("漫游处理完毕");out.flush();}catch (Exception e){}}public static void main(String[] args){new MobileServer();}
}

三、客户端代码

package org.Socket;
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
public class MobileClent implements BusinessProtocal
{String str;//接受来自服务器端的信息Socket socket;//用于连接服务器的套接字DataInputStream in = null;//来自服务器的输入流DataOutputStream out = null;//发送到服务器的输出流public MobileClent(){try{socket = new Socket(InetAddress.getLocalHost(),6789);//连接本地服务器in = new DataInputStream(socket.getInputStream());//重点out = new DataOutputStream(socket.getOutputStream());//重点payBill();Thread.sleep(1000);roamingServer();}catch (Exception e){System.out.println("服务员还没有上班。。。");}}public void payBill(){try{out.writeInt(PAY_BILL);//向服务器发送手机缴费请求out.writeInt(200);//交200元话费out.flush();//刷新输出缓存区str = in.readUTF();//读取来自服务器的信息，堵塞状态System.out.println("来自服务员:"+str);}catch (Exception e){}}public void roamingServer(){try{out.writeInt(ROAMING_SERVER);out.writeUTF("香港");out.flush();str = in.readUTF();System.out.println("来自服务员："+str);}catch (Exception e){}}public static void main(String[] args){new MobileClent();}
}

四、效果展示