importjava.sql.*;

importjava.util.*;

publicclassATM1{

Stringcode;

intpass;

doublemoney;

inti=1;

//检查登录

publicvoidcheckLogin(){

inti=1;

while(i<=3){

System.out.print("请输入您的卡号:");

Scannersc=newScanner(System.in);

Stringcode_=sc.nextLine();

System.out.print("请输入您的密码:");

intpass_=sc.nextInt();

try{

//加载驱动

Class.forName("com.mysql.jdbc.Driver");

//建立连接

java.sql.Connectionconn=DriverManager.getConnection("jdbc:mysql://localhost:3306/atmdb","root","root");

//创建sql传送对象

Statementstmt=conn.createStatement();

//将sql语句通过sql传送对象传送到数据库并执行,返还结果集

Stringsql="select*fromaccountwherecode='"+code_+"'andpass="+pass_;

ResultSetrs=stmt.executeQuery(sql);

//当账号、密码与sql中的账号与密码相对应的时候

//把sql中的相关数据传送到目前变量以便进行数据操作

if(rs.next()){

code=rs.getString(1);

pass=rs.getInt(2);

money=rs.getDouble(3);

loadSys();

}

rs.close();

stmt.close();

conn.close();

}

//捕获异常

catch(Exceptione){

System.out.println(e);

}

//出现三次错误之后提示

i++;

if(i==3){

System.out.print("您已经输错三次密码,该卡已经被锁,请及时到相关网点咨询!");

}

}

}

//保存数据

//注意;下面的关键字("pass、code、money")要与数据库中的名字一样,避免出现错误

publicvoidsaveDb(){

try{

Class.forName("com.mysql.jdbc.Driver");

java.sql.Connectionconn=DriverManager.getConnection("jdbc:mysql://localhost:3306/atmdb","root","root");

Statementstmt=conn.createStatement();

Stringsql="updateaccountsetpass="+pass+"wherecode='"+code+"'";

//dode为String型,所以要用‘’括起来

Stringsql1="updateaccountsetmoney="+money+"wherecode='"+code+"'";

stmt.executeUpdate(sql);//update操作进行数据更新

stmt.executeUpdate(sql1);

stmt.close();

conn.close();

}

catch(Exceptione){

System.out.println(e);

}

}

//欢迎界面

publicstaticvoidwelcome(){

System.out.println("!*****************************************!");

System.out.println("!*************欢迎使用华夏银行*************!");

System.out.println("!*****************************************!");

}

//系统主界面

publicvoidloadSys(){

System.out.println(".------------------------------------.");

System.out.println("1查询余额存款2");

System.out.println("3取款修改密码4");

System.out.println("5退出");

System.out.println(".------------------------------------.");

System.out.print("请输入相应的功能选项数字:");

Scannersz=newScanner(System.in);

intnum=sz.nextInt();

switch(num){

case1:

chaxun();

break;

case2:

cunkuan();

break;

case3:

qukuan();

break;

case4:

xiugai();

break;

case5:

quit();

break;

default:

System.out.println("您输入的数字有误!");

loadSys();

}

}

//查询余额

publicvoidchaxun(){

System.out.println("您卡上的余额为:"+money);

loadSys();

}

//存款

publicvoidcunkuan(){

System.out.print("请输入存款金额:");

Scannerck=newScanner(System.in);

doublemoney1=ck.nextDouble();

money=money+money1;

saveDb();

System.out.println("您卡上的余额为:"+money);

System.out.println("请收好您的卡!");

loadSys();

}

//取款

publicvoidqukuan(){

System.out.print("请输入取款金额:");

Scannerqk=newScanner(System.in);

doublemoney2=qk.nextDouble();

if(money2>money){

System.out.println("您的余额不足!");

qukuan();

}else{

money=money-money2;

saveDb();

System.out.println("您卡上的余额为:"+money);

System.out.println("请收好您的现金!");

loadSys();

}

}

//修改密码

publicvoidxiugai(){

intcs=0;

System.out.print("请输入原密码:");

Scannermm=newScanner(System.in);

intpass1=mm.nextInt();

System.out.print("请输入新密码:");

intpass2=mm.nextInt();

System.out.print("请再次输入新密码:");

intpass3=mm.nextInt();

if(pass==pass1&&pass2==pass3){

System.out.println("修改密码成功!");

pass=pass2;

saveDb();

loadSys();

}else{

if(cs<2){

System.out.print("您输入的密码有误!");

cs++;

xiugai();

}else{

quit();

}

}

}

//退出

publicvoidquit(){

System.exit(1);

}

//主函数

publicstaticvoidmain(Stringargs[]){

/*try{

Class.forName("com.mysql.jdbc.Driver");

java.sql.Connectionconn=DriverManager.getConnection("jdbc:mysql://localhost:3306/atmdb","root","root");

Statementstmt=conn.createStatement();

Stringsql="select*fromaccount";

ResultSetrs=stmt.executeQuery(sql);

while(rs.next()){

Stringcode=rs.getString(1);

intpass=rs.getInt(2);

doublemoney=rs.getDouble(3);

System.out.println(code+"|"+pass+"|"+money);

}

rs.close();

stmt.close();

conn.close();

}

catch(Exceptione){

System.out.println(e);

}*/

ATM1atm=newATM1();

atm.welcome();

atm.checkLogin();

}

}