java模拟ATM功能（控制台连接Mysql数据库）
本文实例为大家分享了java模拟ATM功能的具体代码，供大家参考，具体内容如下
有三个类：Test.java、Customer.java、CustomerDAO.java、ATMSystem.java
ATMSystem.java实现模拟ATM的功能
Customer.java创建一个用户对象
CustomerDAO.java实现连接数据库
Test为主程序
ATMSystem.java:
packageATM;
importjava.util.Scanner;
publicclassATMSystem
{
CustomerDAOdao=newCustomerDAO();
Scannerinput=newScanner(System.in);
privateintid;
publicATMSystem()
{
}
publicvoidRegist()
{
System.out.println("注册卡号：");
intmyid=input.nextInt();
System.out.println("注册用户名：");
Stringmyname=input.next();
System.out.println("注册密码：");
Stringmypwd=input.next();
System.out.println("输入存入金额：");
intmymoney=input.nextInt();
dao.Regist(myid,mypwd,myname,mymoney);
}
publicbooleanlogin()
{
System.out.println("请输入密码：");
Stringmypwd=input.next();
id=dao.login(mypwd);
if(id==-1)
{
System.out.println("登录失败！");
returnfalse;
}
else
{
System.out.println("登陆成功！");
returntrue;
}
}
publicvoidquery(intid)
{
Customercust=dao.query(id);
System.out.println("********************");
System.out.println("卡号："+cust.getid());
System.out.println("余额："+cust.getmoney());
System.out.println("用户名："+cust.getname());
System.out.println("********************");
}
publicvoidsave()
{
System.out.println("输入存款金额：");
intmoney=input.nextInt();
dao.update_save(id,money);
}
publicvoidget()
{
System.out.println("********************");
System.out.println("输入取款金额：");
intmoney=input.nextInt();
dao.update_get(id,money);
System.out.println("********************");
}
publicvoidchange()
{
System.out.println("请输入转账卡号：");
intinid=input.nextInt();
System.out.println("请输入转账金额：");
intmoney=input.nextInt();
dao.change(id,inid,money);
}
publicvoidbegin()
{
intnum=-1;
intNum=0;
System.out.println("请选择功能：");
System.out.println("1.注册2.登录");
Num=input.nextInt();
switch(Num)
{
case1:
Regist();
break;
case2:
if(login())
{
while(num!=0)
{
System.out.println("********************");
System.out.println("欢迎欢迎，热烈欢迎");
System.out.println("请选择功能：");
System.out.println("1.存款2.取款3.查询4.转账0.退出");
System.out.println("********************");
num=input.nextInt();
switch(num)
{
case1:
save();
break;
case2:
get();
break;
case3:
query(id);
break;
case4:
change();
break;
case0:
System.out.println("谢谢使用！");
break;
}
}
}
else
{
System.out.println("登录失败，账号、密码错误！");
}
break;
default:
break;
}
}
}
Customer.java
packageATM;
publicclassCustomer
{
privateintid;
privateStringpwd;
privateintmoney;
privateStringname;
publicintgetid()
{
returnid;
}
publicvoidsetid(intnewid)
{
id=newid;
}
publicStringgetpwd()
{
returnpwd;
}
publicvoidsetpwd(Stringnewpwd)
{
pwd=newpwd;
}
publicStringgetname()
{
returnname;
}
publicvoidsetname(Stringnewname)
{
name=newname;
}
publicintgetmoney()
{
returnmoney;
}
publicvoidsetmoney(intnewmoney)
{
money=newmoney;
}
}
CustomerDAO.java:
packageATM;
importjava.sql.Connection;
importjava.sql.DriverManager;
importjava.sql.ResultSet;
importjava.sql.SQLException;
publicclassCustomerDAO
{
privateConnectionconn=null;
privatejava.sql.PreparedStatementp=null;
publicCustomerDAO()
{
try{
Class.forName("org.gjt.mm.mysql.Driver");
}catch(ClassNotFoundExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
try{
conn=DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql","root","");
}catch(SQLExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
}
publicintlogin(Stringmypwd)
{
Stringsql="select*frommysqlwherepwd=?";
try
{
p=conn.prepareStatement(sql);
p.setString(1,mypwd);
ResultSetrs=p.executeQuery();
if(rs.next())
{
returnrs.getInt("id");
}
rs.close();
p.close();
conn.close();
}
catch(SQLExceptione)
{
e.printStackTrace();
}
return-1;
}
publicCustomerquery(intid)
{
Customercust=newCustomer();
try
{
Stringsql="select*frommysqlwhereid=?";
p=conn.prepareStatement(sql);
p.setInt(1,id);
ResultSetrs=p.executeQuery();
if(rs.next())
{
cust.setid(rs.getInt("id"));
cust.setmoney(rs.getInt("money"));
cust.setname(rs.getString("name"));
cust.setpwd(rs.getString("pwd"));
}
}
catch(Exceptione){
//TODO:handleexception
}
returncust;
}
publicvoidupdate_get(intid,intmoney)
{
Stringsql="select*frommysqlwhereid=?";
try
{
p=conn.prepareStatement(sql);
p.setInt(1,id);
ResultSetrs=p.executeQuery();
if(rs.next())
{
if(rs.getInt("money")
Test.java:
packageATM;
publicclassTest
{
publicstaticvoidmain(String[]args)
{
//TODOAuto-generatedmethodstub
ATMSystemATM=newATMSystem();
while(true)
{
ATM.begin();
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。