JAVASE做的ATM提款机项目 使用面向对象分层等思想 并使用了jdom

package com.atm2; public class UserBiz { UserDAO udao = new UserDAO(); public static final String USER_NOT_EXIST = "用户不存在"; public static final String USER_LOGIN_ERROR = "用户名或密码错误"; public static final String USER_LOGIN_OK = "用户登录成功,欢迎"; public static final String BALANCE_NOT_ENOUGH = "余额不足"; public static final String GET_MONEY_OK = "取款成功"; public static final String SAVE_MONEY_ERROR = "请输入大于100的倍数"; public static final String SAVE_MONEY_OK = "存款成功"; public static final String TRANSFER_ACCOUNT_OK = "转帐成功"; //====================登录==================== public String userLogin(String number,String password){ String info = ""; int flag = udao.userLogin(number, password); if(flag==1){ info = USER_NOT_EXIST; }else if(flag==2){ info =USER_LOGIN_ERROR; }else{ info = USER_LOGIN_OK + udao.user.getName(); } return info; } //====================取款1==================== public String getMoney(String number,double getNum){ String info = ""; int flag = udao.getMoney(number,getNum); if(flag==1){ info = BALANCE_NOT_ENOUGH; }else{ info = GET_MONEY_OK; } return info; } //====================存款2==================== public String saveMoney(String number,double saveNum){ String info = ""; int flag = udao.saveMoney(number,saveNum); if(flag==1){ info = SAVE_MONEY_ERROR; }else{ info = SAVE_MONEY_OK; } return info; } //====================转账3==================== public String transferAccount(String number,String anotherUserNumber,double transNum){ String info = ""; int flag = udao.transferAccount(number,anotherUserNumber, transNum); if(flag==1){ info = USER_NOT_EXIST; }else if(flag==2){ info =BALANCE_NOT_ENOUGH; }else{ info = TRANSFER_ACCOUNT_OK; } return info; } //====================查询4==================== public void queryAccount(String number){ User user = udao.queryAccount(number); System.out.println("hello:"+user.getName()+",your Account leaves:￥"+user.getMoney()); } }