Java MVC与封装示例

本例中View和Controller并未分开，只是对控制器的方法进行了封装与视图分开，可以先从main函数开始逐一寻找并理解调用的方法

Model(类)：

public class Account {private String accountName;private String accountPwd;private double accountMoney;public Account(String name,String pwd,double money){this.accountName = name;this.accountPwd = pwd;this.accountMoney = money;}public Account(String name,String pwd){this.accountName = name;this.accountPwd = pwd;this.accountMoney = 0;}public String getAccountName() {return accountName;}public void setAccountName(String accountName) {this.accountName = accountName;}public String getAccountPwd() {return accountPwd;}public void setAccountPwd(String accountPwd) {this.accountPwd = accountPwd;}public double getAccountMoney() {return accountMoney;}public void setAccountMoney(double accountMoney) {this.accountMoney = accountMoney;}}

View和Controller：

import java.util.ArrayList;import java.util.Scanner;public class AccountBank {public static String LogWelcomeStr = "######## Welcome to  ########";public static String LogChoice = "Plase choice the Operation: 1.EstablishAccount  2.Logon  3.Exit";public static String WelcomeStr = "Welcome to bijienetBank!";public static String ExitStr = "Thank you for your visit,exit the system success!";public static String ChoiceOperation = "plase choice your operation: 1.SaveMoney  2.TakeMoney  3.Transfer  4.See Balance  5.Exit";public static String ChoiceError = "Choice Error! Plase check you choice!";public static String InputAccountName = "Plase input the account name";public static String InputAccountPwd = "Plase input the account password";public static String EstablishSuccess = "Congratulations the account establish success!";public static String EstablishSuccessFollow = "Continue establish account-> 1 Return to the upper level-> 2";public static String EstablishFailure = "Sorry the account establish failure, plase check you input!";public static String SaveMoneyStr = "Plase input you amount of money,at least one hundred and just the hundred multiple";public static String InputLogonAccountName = "Plase input your account";public static String InputLogonAccountPwd = "Plase input your password";public static String InputErrorNotNull = "Plase check your input,the account and pwd must not null!";public static String InputError = "Plase check your input,the account or password have error!";public static String LogonSuccess = "Logon success!";public static String InputMoneyException = "Plase check your money,just the hundred multiple is allow";public static String SaveMoneySuccess = "SaveMoney success!Deposit amount is: ";public static String TakeMoneyStr = "Plase input you amount of money,at least one hundred and just the hundred multiple";public static String TakeMoneyException = "Operation false! Your money is not enough";public static String TakeMoneySuccess = "TakeMoney success!Take amount is: ";public static String TransferStr = "Plase input the target account";public static String TransferMoney = "Plase input the transfer amount";public static String TransferMoneyException = "Operation false! Your money is not enough";public static String TransfertargetException = "Plase check your input, the target account is not exist";public static String TransferSuccess = "Transfer success,the transfer amount is: ";public static String QueryBbalance = "Your balabce is: ";public static ArrayList<Account> accountList = new ArrayList<Account>();/** *  * @param account * @param money * @return */public static boolean saveMoney(Account account,double money){boolean flag = false;if(account != null && money > 0 && money%100==0){account.setAccountMoney(account.getAccountMoney() + money);flag = true;}return flag;}public static boolean takeMoney(Account account,double money){boolean flag = false;if(account != null && money > 0 && money%100==0){account.setAccountMoney(account.getAccountMoney() - money);flag = true;}return flag;}/** *  * @param flag */public static void handleResult(Boolean flag){}/** * 创建用户 * @param name * @param pwd * @return */public static Account EstablishAccount(String name,String pwd){Account account = null;if(!name.equals("") && !pwd.equals("")){account = new Account(name,pwd);}return account;}/** * 处理添加过程的方法 */public static void HandleEstablishAccountProcess() throws InterruptedException{Account account = null;Boolean establishFlag = true;while(establishFlag){System.out.println(InputAccountName);String accountName = new Scanner(System.in).next();System.out.println(InputAccountPwd);String accountPwd = new Scanner(System.in).next();if(accountName!=null && accountPwd !=null){account = EstablishAccount(accountName,accountPwd);}if(account != null){System.out.println(EstablishSuccess);accountList.add(account);boolean choiceEstablishSuccessFollowflag = true;while(choiceEstablishSuccessFollowflag){System.out.println(EstablishSuccessFollow);char choiceEstablishSuccessFollow;choiceEstablishSuccessFollow = new Scanner(System.in).next().charAt(0);if(choiceEstablishSuccessFollow == '1'){establishFlag = true;choiceEstablishSuccessFollowflag = false;}else if(choiceEstablishSuccessFollow == '2'){establishFlag = false;choiceEstablishSuccessFollowflag = false;}else{System.out.println(ChoiceError);choiceEstablishSuccessFollowflag = true;}}}else{System.out.println(EstablishFailure);}}}/** * Save * @param account */public static void storage(Account account){System.out.println(SaveMoneyStr);double amount = new Scanner(System.in).nextDouble();if(amount>0 && amount%100==0){boolean saveResult = saveMoney(account,amount);if(saveResult){System.out.println(SaveMoneySuccess + amount);}else{System.out.println(InputMoneyException);}}else{System.out.println(InputMoneyException);} }/** * Take * @param account */public static void takeMoney(Account account){System.out.println(TakeMoneyStr);double takeAmount = new Scanner(System.in).nextDouble();if(takeAmount < account.getAccountMoney()){if(takeAmount>0 && takeAmount%100==0){boolean takeResult = takeMoney(account,takeAmount);if(takeResult){System.out.println(TakeMoneySuccess + takeAmount);}else{System.out.println(InputMoneyException);}}else{System.out.println(InputMoneyException);}}else{System.out.println(TakeMoneyException);}}/** * Transfer * @param account */public static void transferMoney(Account account){boolean transferFlag = true;System.out.println(TransferStr);String targetAccount = new Scanner(System.in).next();System.out.println(TransferMoney);double transferMoney = new Scanner(System.in).nextDouble();if(transferMoney>0 && transferMoney%100==0){if(transferMoney < account.getAccountMoney()){for(Account transferAccount:accountList){if(transferAccount.getAccountName().equals(targetAccount)){transferAccount.setAccountMoney(transferAccount.getAccountMoney() + transferMoney);account.setAccountMoney(account.getAccountMoney() - transferMoney);System.out.println(TransferSuccess + transferMoney);transferFlag = false;break;}}if(transferFlag){System.out.println(TransfertargetException);}}else{System.out.println(TransferMoneyException);}}else{System.out.println(InputMoneyException);}}/** * CheckBalance */public static void checkBalance(Account account){System.out.println(QueryBbalance+account.getAccountMoney());}/** * OperationProcess */public static void OperationProcess(){System.out.println(InputLogonAccountName);String accountName = new Scanner(System.in).next();System.out.println(InputLogonAccountPwd);String accountPwd = new Scanner(System.in).next();if(!accountName.equals("") && !accountPwd.equals("")){for(Account account : accountList){if(account.getAccountName().equals(accountName) && account.getAccountPwd().equals(accountPwd)){System.out.println(LogonSuccess);boolean flag = true;while(flag){System.out.println(WelcomeStr);System.out.println(ChoiceOperation);char choice = new Scanner(System.in).next().charAt(0);switch(choice){case '1':storage(account);break;case '2':takeMoney(account);break;case '3':transferMoney(account);break;case '4':checkBalance(account);break;case '5':System.out.println(ExitStr);flag = false;break;default:System.out.println(ChoiceError);break;}}break;}else{System.out.println(InputError);}}}else{System.out.println(InputErrorNotNull);}}public static void main(String[] args){ boolean logFlag = true;while(logFlag){System.out.println(LogWelcomeStr);System.out.println(LogChoice);char logChoice = new Scanner(System.in).next().charAt(0);switch(logChoice){case '1':try {HandleEstablishAccountProcess();} catch (InterruptedException e) {e.printStackTrace();}break;case '2':OperationProcess();break;case '3':System.out.println(ExitStr);logFlag = false;break;default:System.out.println(ChoiceError);break;}}}}