用Java實現(xiàn)一個抽獎系統(tǒng)（附完整代碼）

import?java.util.Scanner;
import?java.util.ArrayList;
import?java.io.*;
import?java.util.StringTokenizer;

public?class?Dos?{
????static?boolean?logined=false;
????public?static?void?main(String[]?args)?{
????????User?user=new?User();
????????int?k=0;
????????while(?(k=Main(user))>=1&&k<5){
????????????switch?(k){
????????????????case?1:
????????????????????System.out.print((k=user.login(user))==-1?"此用戶不存在!\n":"");
????????????????????System.out.print((k==-2)?"===<<警告>>用戶：["+user.userName+"]已處于登錄狀態(tài)，無需重復登錄！\n":"");
????????????????????break;
????????????????case?2:
????????????????????user.regist();
????????????????????break;
????????????????case?3:
????????????????????user.getLuckly();
????????????????????break;
????????????????default:System.exit(0);
????????????}
????????}
????}
????static?int?Main(User?user){
????????System.out.println("**********************************************");
????????System.out.println("********************主菜單********************");
????????System.out.println("**********************************************");
????????System.out.println("******??????????<1>?登???錄?????????????******");
????????System.out.println("******??????????<2>?注???冊?????????????******");
????????System.out.println("******??????????<3>?抽???獎?????????????******");
????????System.out.println("******??????????<4>?退???出?????????????******");
????????System.out.println("**********************************************");
????????System.out.println("==============================================");
????????System.out.println(logined???"-[已登錄]-??（1）用戶名:"+user.userName+"???（2）用戶賬號:"+user.userId:"-[未登錄]-???（1）用戶名:NaN???（2）用戶賬號:NaN");
????????System.out.println("==============================================");
????????System.out.print("###===>請輸入您的選擇：");
????????return?(new?Scanner(System.in)).nextInt();
????}
}
public?class?User{
????String?userName,userId,userPwd;
????public?User(){}
????public?User(String?userName,?String?userId,?String?userPwd)?{
????????this.userName?=?userName;
????????this.userId?=?userId;
????????this.userPwd?=?userPwd;
????}
????public?String?getUserName()?{
????????return?userName;
????}
????public?void?setUserName(String?userName)?{
????????if(!userName.equals(""))?{
????????????ArrayList?temp;
????????????this.userId=(temp=(new?operatorFile(this.userName?=?userName)).getUserMess(0)).get(1);
????????????this.userPwd=temp.get(2);
????????}
????}
????public?String?getUserId()?{
????????return?userId;
????}
????public?String?setUserId()?{
????????String?userId="";
????????while((new?operatorFile(userId=String.valueOf?((int)?(Math.random()*9000+1000)))).getUserMess(1).size()>0){?}
????????return?(this.userId?=?userId);
????}
????public?String?getUserPwd()?{
????????return?userPwd;
????}
????public?int?login(User?u)?{
????????int?inputTimes=3;
????????Scanner?scanner=new?Scanner(System.in);
????????operatorFile?getUserMessage=new?operatorFile();
????????System.out.print("======>請輸入您的用戶名：");
????????String?uName="";
????????getUserMessage.setUser(uName=scanner.nextLine());
????????ArrayList?userMess=getUserMessage.getUserMess(0);
????????if(userMess.size()<1)???????return?-1;//返回-1表示用戶不存在
????????if?(uName.equals(userName))?????return?-2;//返回-2表示用戶重復登錄
????????System.out.print("======>請輸入您的登錄密碼：");
????????while(!scanner.next().equals(userMess.get(2))&&inputTimes>0)
????????????System.out.print("===>密碼輸入錯誤！"+((--inputTimes)>0?"您還剩"+inputTimes+"次機會！":"三次機會已經用完了！輸入任意退出"));
????????System.out.println(inputTimes>0?"==>登錄成功！您本次輸入密碼"+(4-inputTimes)+"次！":"==>登錄失敗！");
????????setUserName(inputTimes>0?uName:"");
????????Dos.logined=inputTimes>0?true:false;
????????return?0;
????}
????public?void?regist()?{
????????User?u=new?User();
????????Scanner?scanner=new?Scanner(System.in);
????????System.out.print("===>請輸入新的用戶名：");
????????String?name;
????????while(new?operatorFile(name=scanner.nextLine()).getUserMess(0).size()?>?0)
????????????System.out.print("已存在此用戶,注冊失敗！\n===>請重新輸入新的用戶名：");
????????System.out.print("======>請設置您的(六位數(shù)字)登錄密碼：");
????????String?regex?=?"[0-9]{6}",?pwd;
????????while?(!(pwd?=?scanner.nextLine()).matches(regex))
????????????System.out.print("==>密碼格式不正確，請重新設置您的(六位數(shù)字)登錄密碼：");
????????System.out.println("已為用戶："+(u.userName=name)+"?生成唯一ID:?"+(u.userPwd=pwd));
????????(new?operatorFile()).writeUserMess(u);
????????System.out.println("=======>注冊成功！");
????}
????public?static?HashMap?lucklyUsers=new?HashMap<>();
????public?void?getLuckly()?{
????????if?(!Dos.logined)???{
????????????System.out.println("===>警告：沒有用戶登錄，無法抽獎！");
????????????return?;
????????}
????????while(lucklyUsers.size()<5)
????????{
????????????String?id="";
????????????ArrayList?u;
????????????while((u=(new?operatorFile(id=String.valueOf?((int)?(Math.random()*9000+1000)))).getUserMess(1)).size()<1){?}
????????????lucklyUsers.put(u.get(1),u.get(0));
????????}
????????Iterator?iterator=lucklyUsers.entrySet().iterator();
????????int?no=1;
????????boolean?LUCKLY=false;
????????System.out.println("====>恭喜以下用戶獲得幸運稱號：");
????????while(iterator.hasNext()){
????????????Map.Entry?entry=(Map.Entry)?iterator.next();
????????????System.out.println("幸運用戶["+(no++)+"]??用戶名："+entry.getValue()+"???用戶編號："+entry.getKey());
????????????LUCKLY?=?entry.getKey().equals(this.userId)???true?:?LUCKLY;
????????}
????????System.out.println(LUCKLY?"=========>恭喜您在本次抽獎中獲得幸運稱號！":"=========>很遺憾，今日您未獲獎?！-_-！");
????}
????public?String?toString(){
????????return?this.userName+"?"+this.userId+"?"+this.userPwd;
????}
}
public?class?operatorFile?{
????String?user;
????public?void?setUser(String?user)?{
????????this.user?=?user;
????}
????public?operatorFile(String?user)?{
????????this.user?=?user;
????}
????public?operatorFile()?{?}
????public?ArrayList?getUserMess(int?index){
????????ArrayList?temp=new?ArrayList();
????????File?file=new?File("user.txt");
????????String?line="";
????????try{
????????????BufferedReader?br=new?BufferedReader(new?FileReader(file));
????????????while?((line?=?br.readLine())!=null?&&?line!="\n"){
????????????????temp.clear();
????????????????StringTokenizer?sk=new?StringTokenizer(line);
????????????????while?(sk.hasMoreTokens())?{
????????????????????temp.add(sk.nextToken());
????????????????}
????????????????if?(temp.get(index).equals(this.user))??break;
????????????}
????????}
????????catch(IOException?e){}
????????return?(line==null)?new?ArrayList():temp;
????}
????public?void?writeUserMess(User?u){
????????try{
????????????BufferedWriter?bw=new?BufferedWriter(new?FileWriter(new?File("user.txt"),true));
????????????bw.write(u.toString()+"\n");
????????????bw.close();
????????}
????????catch?(IOException?e){?}
????}
}