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這篇文章主要介紹Java如何實(shí)現(xiàn)ATM系統(tǒng),文中介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們一定要看完!
系統(tǒng)準(zhǔn)備內(nèi)容分析:
每個(gè)用戶的賬戶信息都是一個(gè)對(duì)象,需要提供賬戶類
需要準(zhǔn)備一個(gè)容器,用于存儲(chǔ)和系統(tǒng)全部賬戶對(duì)象信息
首頁(yè)只需要包含:登入和注冊(cè)2個(gè)功能
實(shí)現(xiàn)步驟:
定義賬戶類,用于后期創(chuàng)建賬戶對(duì)象封裝用戶的賬戶信息
賬戶類中的信息至少需要包含(卡號(hào),姓名,密碼,余額,取現(xiàn)額度)
package com.wangxinhua; import java.util.ArrayList; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) { System.out.println("========歡迎進(jìn)入首頁(yè)====="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登入 break; case 2: //開(kāi)戶 break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } }
用戶的賬戶信息,系統(tǒng)如何表示的?
定義賬戶類Account,定義系統(tǒng)關(guān)心的屬性信息
系統(tǒng)采用什么來(lái)儲(chǔ)存全部用戶的賬戶對(duì)象信息?
ArrayList<Account> accounts = new ArrayList<> ();
用戶開(kāi)戶功能實(shí)現(xiàn)
分析
開(kāi)戶功能其實(shí)就是往系統(tǒng)的集合容器中存入一個(gè)新的賬戶對(duì)象的信息
開(kāi)戶功能實(shí)現(xiàn)步驟
定義方法完成開(kāi)戶:
public static void register(ArrayList<Account> accounts){...}
鍵盤錄入姓名,秘密,確認(rèn)密碼(需保證兩次密碼一致)
生成賬戶卡號(hào),卡號(hào)必須由系統(tǒng)自動(dòng)生成8位數(shù)字(必須保證卡號(hào)的唯一)
創(chuàng)建Account賬戶類對(duì)象用戶封裝賬戶信息(姓名,密碼,卡號(hào))
把Account賬戶類對(duì)象存入到集合accounts中去。
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登入 break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null;//查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
開(kāi)戶功能的實(shí)現(xiàn)需要哪幾步操作,需要注意什么問(wèn)題?
開(kāi)戶功能應(yīng)該獨(dú)立定義成方法,并傳入當(dāng)前集合對(duì)象給該方法。
錄入開(kāi)戶信息(姓名,密碼)
卡號(hào)要自動(dòng)生成且唯一
把開(kāi)戶的信息封裝成Account對(duì)象,存入到集合中去。
分析
定義方法:
public static void login(ArrayList<Account>accounts){...}
讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象。
如果沒(méi)有找到了賬戶對(duì)象,說(shuō)明卡號(hào)不存在,繼續(xù)輸入卡號(hào)
如果找到了賬戶對(duì)象,說(shuō)明卡號(hào)存在,繼續(xù)輸入密碼
如果密碼不正確,提示繼續(xù)輸入密碼
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); // } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null;//查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
登錄功能如何實(shí)現(xiàn)的?
根據(jù)卡號(hào)去集合中查詢對(duì)應(yīng)的賬戶對(duì)象
如果找到了賬戶對(duì)象,說(shuō)明卡號(hào)存在,繼續(xù)輸入密碼
如果密碼正確,則登錄成功
用戶操作頁(yè)設(shè)計(jì),查詢賬戶,退出賬戶功能
用戶操作頁(yè),查詢賬戶,退出賬戶功能分析
用戶登錄成功后,需要進(jìn)入用戶操作頁(yè)、
查詢就是直接展示當(dāng)前登錄成功的賬戶對(duì)象的信息
退出賬戶是需要回到首頁(yè)的
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) //showMain 開(kāi)戶首頁(yè)的意思 // ArrayList<Account> accounts 使用方法定義功能傳入容器中 accounts是傳參 { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); //展示操作頁(yè)面 showUserCommand(sc,acc); return;//繼續(xù)結(jié)束登錄方法 } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } private static void showUserCommand(Scanner sc,Account acc) { System.out.println("=========用戶操作頁(yè)面========"); System.out.println("1.查詢賬戶"); System.out.println("2.存款"); System.out.println("3.取款"); System.out.println("4.轉(zhuǎn)賬"); System.out.println("5.修改密碼"); System.out.println("6.退出"); System.out.println("7.注銷賬戶"); while (true) { System.out.println("請(qǐng)您輸入操作命令:"); int command = sc.nextInt(); switch (command) { case 1: //查詢賬戶 showAccount(acc); break; case 2: //存款 break; case 3: //取款 break; case 4: //轉(zhuǎn)賬 break; case 5: //修改密碼 break; case 6: //退出 System.out.println("歡迎下次光臨??!"); return; //結(jié)束當(dāng)前showUserCommand(Scanner sc,Account acc)的方法 case 7: //注銷賬戶 break; default: System.out.println("您輸入有誤!"); } } } private static void showAccount(Account acc) { System.out.println("===========當(dāng)前賬戶詳情========="); System.out.println("卡號(hào)" + acc.getCardId()); System.out.println("姓名" + acc.getUserWord()); System.out.println("余額" + acc.getMoney()); System.out.println("當(dāng)次限額:" + acc.getQuotaMoney()); } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null;//查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
用戶操作頁(yè)設(shè)計(jì),查詢賬戶,退出賬戶功能注意事項(xiàng)
我們應(yīng)該注意接入登錄界面后應(yīng)該注意用戶操作頁(yè)面有哪些
設(shè)置好操作界面后需要接入退出接口
存款分析
存款就是拿到當(dāng)前賬戶對(duì)象
然后讓用戶輸入存款金額
調(diào)用賬戶對(duì)象的setMoney方法將戰(zhàn)虎余額修改成存錢后的余額
存錢后需要查新一下賬戶信息,確認(rèn)是否存錢成功了!
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) //showMain 開(kāi)戶首頁(yè)的意思 // ArrayList<Account> accounts 使用方法定義功能傳入容器中 accounts是傳參 { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); //展示操作頁(yè)面 showUserCommand(sc,acc); return;//繼續(xù)結(jié)束登錄方法 } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } private static void showUserCommand(Scanner sc,Account acc) { while (true) { System.out.println("=========用戶操作頁(yè)面========"); System.out.println("1.查詢賬戶"); System.out.println("2.存款"); System.out.println("3.取款"); System.out.println("4.轉(zhuǎn)賬"); System.out.println("5.修改密碼"); System.out.println("6.退出"); System.out.println("7.注銷賬戶"); System.out.println("請(qǐng)您輸入操作命令:"); int command = sc.nextInt(); switch (command) { case 1: //查詢賬戶 showAccount(acc); break; case 2: //存款 depositMoney(acc,sc); break; case 3: //取款 break; case 4: //轉(zhuǎn)賬 break; case 5: //修改密碼 break; case 6: //退出 System.out.println("歡迎下次光臨??!"); return; //結(jié)束當(dāng)前showUserCommand(Scanner sc,Account acc)的方法 case 7: //注銷賬戶 break; default: System.out.println("您輸入有誤!"); } } } /** * 專門存錢的 * @param acc */ private static void depositMoney(Account acc,Scanner sc) { System.out.println("===========存錢操作========="); System.out.println("請(qǐng)您輸入存款的金額:"); double money = sc.nextDouble(); //直接把金額修改到賬戶對(duì)象的money屬性中去 acc.setMoney(acc.getMoney() + money); System.out.println("存款完成!"); showAccount(acc); } private static void showAccount(Account acc) { System.out.println("===========當(dāng)前賬戶詳情========="); System.out.println("卡號(hào)" + acc.getCardId()); System.out.println("姓名" + acc.getUserWord()); System.out.println("余額" + acc.getMoney()); System.out.println("當(dāng)次限額:" + acc.getQuotaMoney()); } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null; //查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
存款分析
存款就是拿到當(dāng)前賬戶對(duì)象
然后讓用戶輸入存款的金額
調(diào)用賬戶對(duì)象的setMoney方法將賬戶余額修改成存錢后的余額
存錢后需要查詢一下賬戶信息,確認(rèn)是否存錢成功了!
取款分析
取款需要先判斷賬戶是否有錢
有錢則拿到自己賬戶對(duì)象
然后讓用戶輸入取款金額
判斷取款金額是否超過(guò)了當(dāng)次限額,以及金額是否足夠
滿足要求則調(diào)用賬戶對(duì)象的setMoney方法完成金額的修改
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) //showMain 開(kāi)戶首頁(yè)的意思 // ArrayList<Account> accounts 使用方法定義功能傳入容器中 accounts是傳參 { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); //展示操作頁(yè)面 showUserCommand(sc,acc); return;//繼續(xù)結(jié)束登錄方法 } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } private static void showUserCommand(Scanner sc,Account acc) { while (true) { System.out.println("=========用戶操作頁(yè)面========"); System.out.println("1.查詢賬戶"); System.out.println("2.存款"); System.out.println("3.取款"); System.out.println("4.轉(zhuǎn)賬"); System.out.println("5.修改密碼"); System.out.println("6.退出"); System.out.println("7.注銷賬戶"); System.out.println("請(qǐng)您輸入操作命令:"); int command = sc.nextInt(); switch (command) { case 1: //查詢賬戶 showAccount(acc); break; case 2: //存款 depositMoney(acc,sc); break; case 3: //取款 drawMoney(acc,sc); break; case 4: //轉(zhuǎn)賬 break; case 5: //修改密碼 break; case 6: //退出 System.out.println("歡迎下次光臨!!"); return; //結(jié)束當(dāng)前showUserCommand(Scanner sc,Account acc)的方法 case 7: //注銷賬戶 break; default: System.out.println("您輸入有誤!"); } } } /** * 取款操作 * @param acc * @param sc */ private static void drawMoney(Account acc, Scanner sc) { System.out.println("==========取款操作========="); //1.判斷它的賬戶是否足夠100元 if (acc.getMoney() >= 100) { while (true) { System.out.println("請(qǐng)您輸入取款的金額:"); double money = sc.nextDouble(); //2.判斷整個(gè)金額有沒(méi)有超過(guò)當(dāng)次限額 if (money > acc.getQuotaMoney()) { System.out.println("您當(dāng)次取款金額超過(guò)每次限額,不要取那么多,每次最多可以?。?quot; + acc.getQuotaMoney()); } else { //3.判斷當(dāng)前余額是否足夠你取錢 if (acc.getMoney() >= money) { //夠了,可以取錢了 acc.setMoney(acc.getMoney() - money); System.out.println("恭喜您,取錢" + money + "成功了!當(dāng)前賬戶還剩余:" + acc.getMoney()); return;//取錢后干掉了取錢方法 } else { System.out.println("余額不足?。?!"); } } } } else { System.out.println("您自己的金額沒(méi)有超過(guò)100元,該努力工作了~~~"); } } /** * 專門存錢的 * @param acc */ private static void depositMoney(Account acc,Scanner sc) { System.out.println("===========存錢操作========="); System.out.println("請(qǐng)您輸入存款的金額:"); double money = sc.nextDouble(); //直接把金額修改到賬戶對(duì)象的money屬性中去 acc.setMoney(acc.getMoney() + money); System.out.println("存款完成!"); showAccount(acc); } private static void showAccount(Account acc) { System.out.println("===========當(dāng)前賬戶詳情========="); System.out.println("卡號(hào)" + acc.getCardId()); System.out.println("姓名" + acc.getUserWord()); System.out.println("余額" + acc.getMoney()); System.out.println("當(dāng)次限額:" + acc.getQuotaMoney()); } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null; //查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
取款需要先判斷賬戶是否有錢
有錢則拿到自己賬戶對(duì)象
然后讓用戶輸入取款金額
判斷取款金額是否超過(guò)了當(dāng)次限額,以及金額是否足夠
滿足要求則調(diào)用賬戶對(duì)象的setMoney方法完成金額的修改
分析
轉(zhuǎn)賬功能需要判斷系統(tǒng)中是否有2個(gè)賬戶對(duì)象及以上
同時(shí)還要判斷總結(jié)賬戶是否有錢
接下來(lái)需要輸入對(duì)方卡號(hào),判斷對(duì)方賬戶是否存在
對(duì)方賬戶存在還需要認(rèn)證對(duì)方戶主的姓氏
滿足要求則可以把自己賬戶對(duì)象的金額修改到對(duì)方賬戶對(duì)象中去
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) //showMain 開(kāi)戶首頁(yè)的意思 // ArrayList<Account> accounts 使用方法定義功能傳入容器中 accounts是傳參 { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); //展示操作頁(yè)面 showUserCommand(sc,acc,accounts); return;//繼續(xù)結(jié)束登錄方法 } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } private static void showUserCommand(Scanner sc,Account acc,ArrayList<Account> accounts) { while (true) { System.out.println("=========用戶操作頁(yè)面========"); System.out.println("1.查詢賬戶"); System.out.println("2.存款"); System.out.println("3.取款"); System.out.println("4.轉(zhuǎn)賬"); System.out.println("5.修改密碼"); System.out.println("6.退出"); System.out.println("7.注銷賬戶"); System.out.println("請(qǐng)您輸入操作命令:"); int command = sc.nextInt(); switch (command) { case 1: //查詢賬戶 showAccount(acc); break; case 2: //存款 depositMoney(acc,sc); break; case 3: //取款 drawMoney(acc,sc); break; case 4: //轉(zhuǎn)賬 transferMoney(accounts,acc ,sc); break; case 5: //修改密碼 break; case 6: //退出 System.out.println("歡迎下次光臨??!"); return; //結(jié)束當(dāng)前showUserCommand(Scanner sc,Account acc)的方法 case 7: //注銷賬戶 break; default: System.out.println("您輸入有誤!"); } } } /** * 轉(zhuǎn)賬功能 * @param accounts * @param acc * @param sc */ private static void transferMoney(ArrayList<Account> accounts, Account acc, Scanner sc) { //1.判斷系統(tǒng)中是否有2個(gè)賬戶及以上 if (accounts.size() < 2) { System.out.println("對(duì)不起,系統(tǒng)中無(wú)其他賬戶,您不可以轉(zhuǎn)賬??!"); return; } //2.判斷自己的賬戶對(duì)象中是否有錢 if (acc.getMoney() == 0) { System.out.println("對(duì)不起,您自己都快吃土了,就別裝逼了?。?quot;); return; } //3.開(kāi)始轉(zhuǎn)賬邏輯 while (true) { System.out.println("請(qǐng)您輸入對(duì)方賬戶的卡號(hào):"); String cardId = sc.next(); Account account = getAccountBycardId(cardId,accounts); //判斷整個(gè)賬戶對(duì)象是否存在,存在說(shuō)明對(duì)方卡號(hào)輸入正確 if (account != null) { //判斷這個(gè)賬戶對(duì)象是否是當(dāng)前自己登錄的賬戶 if (account.getCardId().equals(acc.getCardId())) { //也就是這里企圖想給自己轉(zhuǎn)賬 System.out.println("您不能給自己轉(zhuǎn)賬!"); } else { //確認(rèn)對(duì)方的姓氏 String name = "*" + account.getUserWord().substring(1); System.out.println("請(qǐng)您確認(rèn)【" + name + "】的姓氏:"); String preName = sc.next(); //判斷 if (account.getUserWord().startsWith(preName)) { //真正的轉(zhuǎn)賬才剛剛開(kāi)始 System.out.println("請(qǐng)您輸入轉(zhuǎn)賬的金額:"); double money = sc.nextDouble(); //判斷這個(gè)金額是否超過(guò)了自己的金額 if (money > acc.getMoney()) { System.out.println("對(duì)不起,您要轉(zhuǎn)賬的金額太多,您最多可以轉(zhuǎn)賬:" + acc.getMoney()); } else { //開(kāi)始了 acc.setMoney(acc.getMoney() - money); account.setMoney(account.getMoney() + money); System.out.println("恭喜您,轉(zhuǎn)賬成功了,已經(jīng)為" + account.getUserWord() + "轉(zhuǎn)賬了:" + money); showAccount(acc); return; } } else { System.out.println("對(duì)不起,您認(rèn)證的信息有誤~~~"); } } } else { System.out.println("對(duì)不起,您輸入的轉(zhuǎn)賬卡號(hào)有問(wèn)題??!"); } } } /** * 取款操作 * @param acc * @param sc */ private static void drawMoney(Account acc, Scanner sc) { System.out.println("==========取款操作========="); //1.判斷它的賬戶是否足夠100元 if (acc.getMoney() >= 100) { while (true) { System.out.println("請(qǐng)您輸入取款的金額:"); double money = sc.nextDouble(); //2.判斷整個(gè)金額有沒(méi)有超過(guò)當(dāng)次限額 if (money > acc.getQuotaMoney()) { System.out.println("您當(dāng)次取款金額超過(guò)每次限額,不要取那么多,每次最多可以?。?quot; + acc.getQuotaMoney()); } else { //3.判斷當(dāng)前余額是否足夠你取錢 if (acc.getMoney() >= money) { //夠了,可以取錢了 acc.setMoney(acc.getMoney() - money); System.out.println("恭喜您,取錢" + money + "成功了!當(dāng)前賬戶還剩余:" + acc.getMoney()); return;//取錢后干掉了取錢方法 } else { System.out.println("余額不足?。?!"); } } } } else { System.out.println("您自己的金額沒(méi)有超過(guò)100元,該努力工作了~~~"); } } /** * 專門存錢的 * @param acc */ private static void depositMoney(Account acc,Scanner sc) { System.out.println("===========存錢操作========="); System.out.println("請(qǐng)您輸入存款的金額:"); double money = sc.nextDouble(); //直接把金額修改到賬戶對(duì)象的money屬性中去 acc.setMoney(acc.getMoney() + money); System.out.println("存款完成!"); showAccount(acc); } private static void showAccount(Account acc) { System.out.println("===========當(dāng)前賬戶詳情========="); System.out.println("卡號(hào)" + acc.getCardId()); System.out.println("姓名" + acc.getUserWord()); System.out.println("余額" + acc.getMoney()); System.out.println("當(dāng)次限額:" + acc.getQuotaMoney()); } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null; //查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
轉(zhuǎn)賬功能需要判斷系統(tǒng)中是否有2個(gè)賬戶對(duì)象及以上
同時(shí)還要判斷總結(jié)賬戶是否有錢
接下來(lái)需要輸入對(duì)方卡號(hào),判斷對(duì)方賬戶是否存在
對(duì)方賬戶存在還需要認(rèn)證對(duì)方戶主的姓氏
滿足要求則可以把自己賬戶對(duì)象的金額修改到對(duì)方賬戶對(duì)象中去
修改密碼與銷戶
分析
修改密碼就是把當(dāng)前對(duì)現(xiàn)象的密碼屬性使用set方法進(jìn)行更新
銷戶是從集合對(duì)象中刪除當(dāng)前對(duì)象,并回到首頁(yè)
這里為止所有的ATM系統(tǒng)的操作代碼就已經(jīng)完成
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) //showMain 開(kāi)戶首頁(yè)的意思 // ArrayList<Account> accounts 使用方法定義功能傳入容器中 accounts是傳參 { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); //展示操作頁(yè)面 showUserCommand(sc,acc,accounts); return;//繼續(xù)結(jié)束登錄方法 } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } private static void showUserCommand(Scanner sc,Account acc,ArrayList<Account> accounts) { while (true) { System.out.println("=========用戶操作頁(yè)面========"); System.out.println("1.查詢賬戶"); System.out.println("2.存款"); System.out.println("3.取款"); System.out.println("4.轉(zhuǎn)賬"); System.out.println("5.修改密碼"); System.out.println("6.退出"); System.out.println("7.注銷賬戶"); System.out.println("請(qǐng)您輸入操作命令:"); int command = sc.nextInt(); switch (command) { case 1: //查詢賬戶 showAccount(acc); break; case 2: //存款 depositMoney(acc,sc); break; case 3: //取款 drawMoney(acc,sc); break; case 4: //轉(zhuǎn)賬 transferMoney(accounts,acc ,sc); break; case 5: //修改密碼 updataPassWord(acc,sc); return;//結(jié)束當(dāng)前………… case 6: //退出 System.out.println("歡迎下次光臨??!"); return; //結(jié)束當(dāng)前showUserCommand(Scanner sc,Account acc)的方法 case 7: //注銷賬戶 //從當(dāng)前集合中抹掉當(dāng)前賬戶對(duì)象即可 accounts.remove(acc); System.out.println("銷戶成功了!!"); return; default: System.out.println("您輸入有誤!"); } } } /** * 修改密碼 * @param acc */ private static void updataPassWord(Account acc,Scanner sc) { System.out.println("===========修改密碼========="); while (true) { System.out.println("請(qǐng)您輸入正確的密碼:"); String okPassWord = sc.next(); //判斷密碼是否正確 if (acc.getPassWord().equals(okPassWord)) { //可以輸入新密碼 System.out.println("請(qǐng)您輸入新的密碼:"); String newPassWord = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okNewPassWord = sc.next(); if (newPassWord.equals(okNewPassWord)) { //修改賬戶對(duì)象的密碼為新密碼 acc.setPassWord(newPassWord); return;//直接結(jié)束方法! } else { System.out.println("您兩次輸入的密碼不一致~~"); } } else { System.out.println("當(dāng)前輸入的密碼不正確~~~"); } } } /** * 轉(zhuǎn)賬功能 * @param accounts * @param acc * @param sc */ private static void transferMoney(ArrayList<Account> accounts, Account acc, Scanner sc) { //1.判斷系統(tǒng)中是否有2個(gè)賬戶及以上 if (accounts.size() < 2) { System.out.println("對(duì)不起,系統(tǒng)中無(wú)其他賬戶,您不可以轉(zhuǎn)賬?。?quot;); return; } //2.判斷自己的賬戶對(duì)象中是否有錢 if (acc.getMoney() == 0) { System.out.println("對(duì)不起,您自己都快吃土了,就別裝逼了!!"); return; } //3.開(kāi)始轉(zhuǎn)賬邏輯 while (true) { System.out.println("請(qǐng)您輸入對(duì)方賬戶的卡號(hào):"); String cardId = sc.next(); Account account = getAccountBycardId(cardId,accounts); //判斷整個(gè)賬戶對(duì)象是否存在,存在說(shuō)明對(duì)方卡號(hào)輸入正確 if (account != null) { //判斷這個(gè)賬戶對(duì)象是否是當(dāng)前自己登錄的賬戶 if (account.getCardId().equals(acc.getCardId())) { //也就是這里企圖想給自己轉(zhuǎn)賬 System.out.println("您不能給自己轉(zhuǎn)賬!"); } else { //確認(rèn)對(duì)方的姓氏 String name = "*" + account.getUserWord().substring(1); System.out.println("請(qǐng)您確認(rèn)【" + name + "】的姓氏:"); String preName = sc.next(); //判斷 if (account.getUserWord().startsWith(preName)) { //真正的轉(zhuǎn)賬才剛剛開(kāi)始 System.out.println("請(qǐng)您輸入轉(zhuǎn)賬的金額:"); double money = sc.nextDouble(); //判斷這個(gè)金額是否超過(guò)了自己的金額 if (money > acc.getMoney()) { System.out.println("對(duì)不起,您要轉(zhuǎn)賬的金額太多,您最多可以轉(zhuǎn)賬:" + acc.getMoney()); } else { //開(kāi)始了 acc.setMoney(acc.getMoney() - money); account.setMoney(account.getMoney() + money); System.out.println("恭喜您,轉(zhuǎn)賬成功了,已經(jīng)為" + account.getUserWord() + "轉(zhuǎn)賬了:" + money); showAccount(acc); return; } } else { System.out.println("對(duì)不起,您認(rèn)證的信息有誤~~~"); } } } else { System.out.println("對(duì)不起,您輸入的轉(zhuǎn)賬卡號(hào)有問(wèn)題??!"); } } } /** * 取款操作 * @param acc * @param sc */ private static void drawMoney(Account acc, Scanner sc) { System.out.println("==========取款操作========="); //1.判斷它的賬戶是否足夠100元 if (acc.getMoney() >= 100) { while (true) { System.out.println("請(qǐng)您輸入取款的金額:"); double money = sc.nextDouble(); //2.判斷整個(gè)金額有沒(méi)有超過(guò)當(dāng)次限額 if (money > acc.getQuotaMoney()) { System.out.println("您當(dāng)次取款金額超過(guò)每次限額,不要取那么多,每次最多可以?。?quot; + acc.getQuotaMoney()); } else { //3.判斷當(dāng)前余額是否足夠你取錢 if (acc.getMoney() >= money) { //夠了,可以取錢了 acc.setMoney(acc.getMoney() - money); System.out.println("恭喜您,取錢" + money + "成功了!當(dāng)前賬戶還剩余:" + acc.getMoney()); return;//取錢后干掉了取錢方法 } else { System.out.println("余額不足?。?!"); } } } } else { System.out.println("您自己的金額沒(méi)有超過(guò)100元,該努力工作了~~~"); } } /** * 專門存錢的 * @param acc */ private static void depositMoney(Account acc,Scanner sc) { System.out.println("===========存錢操作========="); System.out.println("請(qǐng)您輸入存款的金額:"); double money = sc.nextDouble(); //直接把金額修改到賬戶對(duì)象的money屬性中去 acc.setMoney(acc.getMoney() + money); System.out.println("存款完成!"); showAccount(acc); } private static void showAccount(Account acc) { System.out.println("===========當(dāng)前賬戶詳情========="); System.out.println("卡號(hào)" + acc.getCardId()); System.out.println("姓名" + acc.getUserWord()); System.out.println("余額" + acc.getMoney()); System.out.println("當(dāng)次限額:" + acc.getQuotaMoney()); } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null; //查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
package com.wangxinhua; /** 賬戶類 */ public class Account { private String CardId;//卡號(hào) private String UserWord;//客戶名稱 private String PassWord;//密碼 private double Money;//余額 private double QuotaMoney;//當(dāng)次取現(xiàn)限額 //無(wú)參函數(shù) public Account() { } // 構(gòu)造好了有參函數(shù),那么就會(huì)有無(wú)參函數(shù) // 有參函數(shù) public Account(String cardId, String userWord, String passWord, double quotaMoney) { CardId = cardId; UserWord = userWord; PassWord = passWord; QuotaMoney = quotaMoney; } public String getCardId() { return CardId; } public void setCardId(String cardId) { CardId = cardId; } public String getUserWord() { return UserWord; } public void setUserWord(String userWord) { UserWord = userWord; } public String getPassWord() { return PassWord; } public void setPassWord(String passWord) { PassWord = passWord; } public double getMoney() { return Money; } public void setMoney(double money) { Money = money; } public double getQuotaMoney() { return QuotaMoney; } public void setQuotaMoney(double quotaMoney) { QuotaMoney = quotaMoney; } }
這里是第一個(gè)類用于構(gòu)造函數(shù) 下面這個(gè)是第二個(gè)類
package com.wangxinhua; import java.lang.reflect.Array; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class ATMSystem { public static void main(String[] args) { // 1.準(zhǔn)備系統(tǒng)需要的容器對(duì)象,用戶存儲(chǔ)賬戶對(duì)象 ArrayList<Account> accounts = new ArrayList(); // 2.準(zhǔn)備系統(tǒng)的首頁(yè),登入,開(kāi)戶 showMain(accounts); } public static void showMain(ArrayList<Account> accounts) //showMain 開(kāi)戶首頁(yè)的意思 // ArrayList<Account> accounts 使用方法定義功能傳入容器中 accounts是傳參 { System.out.println("=============歡迎進(jìn)入首頁(yè)==========="); Scanner sc = new Scanner(System.in); while(true) { System.out.println("請(qǐng)您輸入您想做的操作:"); System.out.println("1.登錄"); System.out.println("2.開(kāi)戶"); System.out.println("您可以輸入命令了:"); int command = sc.nextInt(); switch(command) { case 1: //登錄 login(accounts,sc); break; case 2: //開(kāi)戶 register(accounts,sc); break; default: System.out.println("您當(dāng)前輸入的操作命令不被支持!"); } } } /** * 完成用戶登錄 * @param accounts */ private static void login(ArrayList<Account> accounts,Scanner sc) { //必須系統(tǒng)中存在賬戶才可以登錄 if (accounts.size() == 0) { //沒(méi)有任何賬戶 System.out.println("當(dāng)前系統(tǒng)中無(wú)任何賬戶,您需要先注冊(cè)!"); return;//直接結(jié)束方法的執(zhí)行! } //2.讓用戶鍵盤錄入卡號(hào),根據(jù)卡號(hào)查詢賬戶對(duì)象 while (true) { System.out.println("請(qǐng)您輸入登錄的卡號(hào):"); String cardId = sc.next(); //根據(jù)卡號(hào)查詢賬戶對(duì)象 Account acc = getAccountBycardId(cardId,accounts); // 3.判斷賬戶對(duì)象是否存在,存在說(shuō)明卡號(hào)沒(méi)問(wèn)題 if (acc != null) { while (true) { // 4.讓用戶繼續(xù)輸入密碼 System.out.println("請(qǐng)您輸入登錄的密碼:"); String password = sc.next(); // 5.判斷密碼是否正確 if (acc.getPassWord().equals(password)) { //密碼正確,登入成功 //展示系統(tǒng)登錄后的操作界面 System.out.println("恭喜您," + acc.getUserWord() +",成功登入系統(tǒng),您的卡號(hào)是:" + acc.getCardId()); //展示操作頁(yè)面 showUserCommand(sc,acc,accounts); return;//繼續(xù)結(jié)束登錄方法 } else { System.out.println("您的密碼有誤,請(qǐng)確認(rèn)!"); } } } else { System.out.println("對(duì)不起,不存在該卡號(hào)的賬戶!"); } } } private static void showUserCommand(Scanner sc,Account acc,ArrayList<Account> accounts) { while (true) { System.out.println("=========用戶操作頁(yè)面========"); System.out.println("1.查詢賬戶"); System.out.println("2.存款"); System.out.println("3.取款"); System.out.println("4.轉(zhuǎn)賬"); System.out.println("5.修改密碼"); System.out.println("6.退出"); System.out.println("7.注銷賬戶"); System.out.println("請(qǐng)您輸入操作命令:"); int command = sc.nextInt(); switch (command) { case 1: //查詢賬戶 showAccount(acc); break; case 2: //存款 depositMoney(acc,sc); break; case 3: //取款 drawMoney(acc,sc); break; case 4: //轉(zhuǎn)賬 transferMoney(accounts,acc ,sc); break; case 5: //修改密碼 updataPassWord(acc,sc); return;//結(jié)束當(dāng)前………… case 6: //退出 System.out.println("歡迎下次光臨?。?quot;); return; //結(jié)束當(dāng)前showUserCommand(Scanner sc,Account acc)的方法 case 7: //注銷賬戶 //從當(dāng)前集合中抹掉當(dāng)前賬戶對(duì)象即可 accounts.remove(acc); System.out.println("銷戶成功了??!"); return; default: System.out.println("您輸入有誤!"); } } } /** * 修改密碼 * @param acc */ private static void updataPassWord(Account acc,Scanner sc) { System.out.println("===========修改密碼========="); while (true) { System.out.println("請(qǐng)您輸入正確的密碼:"); String okPassWord = sc.next(); //判斷密碼是否正確 if (acc.getPassWord().equals(okPassWord)) { //可以輸入新密碼 System.out.println("請(qǐng)您輸入新的密碼:"); String newPassWord = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okNewPassWord = sc.next(); if (newPassWord.equals(okNewPassWord)) { //修改賬戶對(duì)象的密碼為新密碼 acc.setPassWord(newPassWord); return;//直接結(jié)束方法! } else { System.out.println("您兩次輸入的密碼不一致~~"); } } else { System.out.println("當(dāng)前輸入的密碼不正確~~~"); } } } /** * 轉(zhuǎn)賬功能 * @param accounts * @param acc * @param sc */ private static void transferMoney(ArrayList<Account> accounts, Account acc, Scanner sc) { //1.判斷系統(tǒng)中是否有2個(gè)賬戶及以上 if (accounts.size() < 2) { System.out.println("對(duì)不起,系統(tǒng)中無(wú)其他賬戶,您不可以轉(zhuǎn)賬?。?quot;); return; } //2.判斷自己的賬戶對(duì)象中是否有錢 if (acc.getMoney() == 0) { System.out.println("對(duì)不起,您自己都快吃土了,就別裝逼了??!"); return; } //3.開(kāi)始轉(zhuǎn)賬邏輯 while (true) { System.out.println("請(qǐng)您輸入對(duì)方賬戶的卡號(hào):"); String cardId = sc.next(); Account account = getAccountBycardId(cardId,accounts); //判斷整個(gè)賬戶對(duì)象是否存在,存在說(shuō)明對(duì)方卡號(hào)輸入正確 if (account != null) { //判斷這個(gè)賬戶對(duì)象是否是當(dāng)前自己登錄的賬戶 if (account.getCardId().equals(acc.getCardId())) { //也就是這里企圖想給自己轉(zhuǎn)賬 System.out.println("您不能給自己轉(zhuǎn)賬!"); } else { //確認(rèn)對(duì)方的姓氏 String name = "*" + account.getUserWord().substring(1); System.out.println("請(qǐng)您確認(rèn)【" + name + "】的姓氏:"); String preName = sc.next(); //判斷 if (account.getUserWord().startsWith(preName)) { //真正的轉(zhuǎn)賬才剛剛開(kāi)始 System.out.println("請(qǐng)您輸入轉(zhuǎn)賬的金額:"); double money = sc.nextDouble(); //判斷這個(gè)金額是否超過(guò)了自己的金額 if (money > acc.getMoney()) { System.out.println("對(duì)不起,您要轉(zhuǎn)賬的金額太多,您最多可以轉(zhuǎn)賬:" + acc.getMoney()); } else { //開(kāi)始了 acc.setMoney(acc.getMoney() - money); account.setMoney(account.getMoney() + money); System.out.println("恭喜您,轉(zhuǎn)賬成功了,已經(jīng)為" + account.getUserWord() + "轉(zhuǎn)賬了:" + money); showAccount(acc); return; } } else { System.out.println("對(duì)不起,您認(rèn)證的信息有誤~~~"); } } } else { System.out.println("對(duì)不起,您輸入的轉(zhuǎn)賬卡號(hào)有問(wèn)題??!"); } } } /** * 取款操作 * @param acc * @param sc */ private static void drawMoney(Account acc, Scanner sc) { System.out.println("==========取款操作========="); //1.判斷它的賬戶是否足夠100元 if (acc.getMoney() >= 100) { while (true) { System.out.println("請(qǐng)您輸入取款的金額:"); double money = sc.nextDouble(); //2.判斷整個(gè)金額有沒(méi)有超過(guò)當(dāng)次限額 if (money > acc.getQuotaMoney()) { System.out.println("您當(dāng)次取款金額超過(guò)每次限額,不要取那么多,每次最多可以?。?quot; + acc.getQuotaMoney()); } else { //3.判斷當(dāng)前余額是否足夠你取錢 if (acc.getMoney() >= money) { //夠了,可以取錢了 acc.setMoney(acc.getMoney() - money); System.out.println("恭喜您,取錢" + money + "成功了!當(dāng)前賬戶還剩余:" + acc.getMoney()); return;//取錢后干掉了取錢方法 } else { System.out.println("余額不足?。?!"); } } } } else { System.out.println("您自己的金額沒(méi)有超過(guò)100元,該努力工作了~~~"); } } /** * 專門存錢的 * @param acc */ private static void depositMoney(Account acc,Scanner sc) { System.out.println("===========存錢操作========="); System.out.println("請(qǐng)您輸入存款的金額:"); double money = sc.nextDouble(); //直接把金額修改到賬戶對(duì)象的money屬性中去 acc.setMoney(acc.getMoney() + money); System.out.println("存款完成!"); showAccount(acc); } private static void showAccount(Account acc) { System.out.println("===========當(dāng)前賬戶詳情========="); System.out.println("卡號(hào)" + acc.getCardId()); System.out.println("姓名" + acc.getUserWord()); System.out.println("余額" + acc.getMoney()); System.out.println("當(dāng)次限額:" + acc.getQuotaMoney()); } /** * 用戶開(kāi)戶功能 * @param accounts 賬戶的集合對(duì)象 */ private static void register(ArrayList<Account> accounts, Scanner sc) { System.out.println("=========用戶開(kāi)戶功能=========="); //鍵盤錄入 姓名 密碼 確認(rèn)密碼 System.out.println("請(qǐng)您輸入開(kāi)戶名稱:"); String name = sc.next(); String password = ""; while (true) { System.out.println("請(qǐng)您輸入開(kāi)戶密碼:"); password = sc.next(); System.out.println("請(qǐng)您輸入確認(rèn)密碼:"); String okPassword = sc.next(); // 判斷兩次輸入的密碼是否一致 if (okPassword.equals(password)) //字符串比較用equals { break; } else { System.out.println("兩次密碼必須一致~~~"); } } System.out.println("請(qǐng)您輸入當(dāng)次限額:"); double quotaMoney = sc.nextDouble(); // 3.生成賬戶的卡號(hào),卡號(hào)是8位,而且不能與其他賬戶卡號(hào)重復(fù)。 String cardId = creatCardId(accounts); // 4.創(chuàng)建一個(gè)賬戶對(duì)象封裝賬戶的信息 // public Account(String cardId, String userWord, String passWord, double money, double quotaMoney) Account account = new Account(cardId,name,password,quotaMoney); // 5.把賬戶對(duì)象添加到集合中去 accounts.add(account); System.out.println("恭喜您,您開(kāi)戶成功,您的卡號(hào)是:" + account.getCardId() + ",請(qǐng)您妥善保管"); } public static String creatCardId(ArrayList<Account> accouts) { while (true) { // 生成8位隨機(jī)的數(shù)字代表卡號(hào) String cardId = ""; Random r = new Random(); for (int i = 0; i < 8; i++) { cardId += r.nextInt(10); } // 判斷卡號(hào)是否重復(fù)了 Account acc = getAccountBycardId(cardId,accouts); if (acc == null) { // 說(shuō)明當(dāng)前卡號(hào)沒(méi)有重復(fù) return cardId; } } } public static Account getAccountBycardId(String cardId, ArrayList<Account> accounts) { // 根據(jù)卡號(hào)查詢對(duì)象 for (int i = 0; i < accounts.size(); i++) { Account acc = accounts.get(i); if (acc.getCardId().equals(cardId)) { return acc; } } return null; //查無(wú)此賬戶,說(shuō)明卡號(hào)沒(méi)有重復(fù)了! } }
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