模拟ATM机将输入的数据插入数据库

ATM抽象类

public abstract class ATM {

    private double balance;
    private String idcard;
    private String password;
    public String getIdcard() {
        return idcard;
    }
    public void setIdcard(String idcard) {
        this.idcard = idcard;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public double getBalance() {
        return balance;
    }
    public void setBalance(double balance) {
        this.balance = balance;
    }
    public void balance()
    {

    }
    public boolean cunkuan(double cun)
    {
        if(cun >0)
        {
            balance += cun;
            System.out.println("存款成功！");
            return true;
        }
        else
        {
            System.out.println("您输入的存款数不正确，将退出该服务！");
            return false;
        }
    }
    public boolean qukuan(double qu)
    {
        if(qu <= balance)
        {   balance -=qu;
            System.out.println("取款成功！");
            return true;
        }
        else
        {
            System.out.println("取款失败，将退出该服务！");
            return false;
        }
    }
    //添加开户的抽象方法
    public abstract void kaihu();

}

ATM子类，并实现其开户的方法

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

public class ChildATM extends ATM {

    //添加抽象类的开户方法并实现该方法
    @Override
    public void kaihu() {
        System.out.println("*********************");
        System.out.println("您选择的为开户功能");
        System.out.println("请输入您的姓名：");
        ChildATM cs= new ChildATM();
        cs.setBalance(300);
        Scanner  sc = new Scanner(System.in);
        String name=sc.nextLine();
        for(int i=1;i>0;i++)
        {
            System.out.println("请输入您的身份证号");
            Scanner sc1= new Scanner(System.in);
            String idcard=sc1.nextLine();
            if(idcard.length()==18)
            {   //判断密码输入的次数
                for(i=0;i<3;i++)
                {
                    System.out.println("请输入您的密码");
                    String password =sc.nextLine();
                    int input =Integer.parseInt(password) ;
                    if(input >=100000 && input <1000000)
                    {
                        System.out.println("开户成功");
                        cs.setIdcard(idcard);
                        cs.setPassword(password);
                        break;
                    }
                    else
                    {
                        System.out.println("请输入6位数的密码");
                    }
                    System.out.println("您输入的密码有误，请重新输入"+"您的输入次数还有"+(2-i));

                }
                break;
            }
            else
            {
                System.out.println("身份证位数不正确，请继续输入");

            }
        }
            int account =(int)((Math.random()*10)*100000);
        System.out.println("您的账号为："+account);
        //访问数据库
                //1.加载驱动，加载数据库提供的驱动类
                try {
                    Class.forName("oracle.jdbc.driver.OracleDriver");
                    //2.获取数据库的连接 ：通过数据库的管理
                    //url:数据库的地址
                    //user:用户名
                    //password:密码
                    Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "test0816", "laoer123");
                    System.out.println("数据库连接成功");
                    //操作数据库
                    //3.获得操作数据库的声明
                    Statement st = conn.createStatement();
                    //4.DML增加数据
                    //执行更新操作
                    //返回值代表该操作值记录返回的条数
                    //将输入的数据存入数据库中

                    int i = st.executeUpdate("insert into account (a_id,a_name,a_password,a_idcard,a_balance)"+"values('"+account+"','"+name+"','"+cs.getPassword()+"','"+cs.getIdcard()+"','"+cs.getBalance()+"')");
                    System.out.println("操作数据成功，返回值="+i);
                    //关闭释放资源
                    st.close();
                    conn.close();
                    } 

                catch (ClassNotFoundException | SQLException e) {
                        e.printStackTrace();
                }

    }

}

实现查询账户数据

 public void cha()
    {
         System.out.println("*******************");
        System.out.println("您选择的是查询功能");
        System.out.println("请输入您的卡号");
        ChildATM cs= new ChildATM();
        Scanner sc= new Scanner(System.in);
         String kahao=sc.nextLine();
         //判断卡号是否正确
         try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "test0816", "laoer123");
            Statement st = conn.createStatement();
            ResultSet rs = st.executeQuery("select * from account where a_id='"+kahao+"'");
            //查询用户输入卡号的结果集
           if(rs.next())
           {
               String ss = rs.getString("a_password");
               for(int i=0;i<3;i++)
               {
                   System.out.println("请输入您的密码");
                   Scanner sc2 = new Scanner(System.in);
                   String mima=sc2.nextLine();
                   if(ss.equals(mima))
                   {
                       System.out.println("姓名："+rs.getString("a_name")+"账号："+rs.getString("a_id")+"密码："+rs.getString("a_password")+"身份证号："+rs.getString("a_idcard")+"余额："+rs.getString("a_balance"));
                       break;
                   }
                   else
                   {
                       System.out.println("请重新输入密码");
                   }
               }
           }
           else
           {
               System.out.println("您输入的卡号不存在！");
           }
            st.close();
            conn.close();
            } 

        catch (ClassNotFoundException | SQLException e) {
                e.printStackTrace();
        }

    }

实现存款

 public  void cunkuan()
  {
      System.out.println("*******************");
      System.out.println("您选择的是存款功能");
      System.out.println("请输入您的卡号");
      ChildATM cs= new ChildATM();
        Scanner sc= new Scanner(System.in);
      String kahao=sc.nextLine();
      //判断卡号是否正确
      try {
          Class.forName("oracle.jdbc.driver.OracleDriver");
          Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "test0816", "laoer123");
          Statement st = conn.createStatement();
          ResultSet rs = st.executeQuery("select * from account where a_id='"+kahao+"'");
          //查询用户输入卡号的结果集
         if(rs.next())
         {
             String ss = rs.getString("a_password");
             for(int i=0;i<3;i++)
             {
                 System.out.println("请输入您的密码");
                 Scanner sc2 = new Scanner(System.in);
                 String mima=sc2.nextLine();
                 if(ss.equals(mima))
                 {
                     System.out.println("姓名："+rs.getString("a_name")+"账号："+rs.getString("a_id")+"密码："+rs.getString("a_password")+"身份证号："+rs.getString("a_idcard")+"余额："+rs.getString("a_balance"));
                     System.out.println("请输入您要存款的金额");
                     double cun=sc2.nextDouble();
                     //执行语句
                     if(cun>0)
                     {
                         double money =rs.getDouble("a_balance");
                         money+=cun;
                         String sql ="update account set a_balance="+money+"where a_id ='"+kahao+"'";
                         st.executeUpdate(sql);
                         System.out.println("存款成功");
                     }
                     else
                     {
                         System.out.println("存款失败！");
                     }
                     break;
                 }

                 else
                 {
                     System.out.println("请重新输入密码");
                 }
             }
         }
         else
         {
             System.out.println("您输入的卡号不存在！");
         }
          st.close();
          conn.close();
          } 

      catch (ClassNotFoundException | SQLException e) {
              e.printStackTrace();
      }

  }

实现取款

 public  void qukuan()
  {
      System.out.println("*******************");
      System.out.println("您选择的是存款功能");
      System.out.println("请输入您的卡号");
      ChildATM cs= new ChildATM();
        Scanner sc= new Scanner(System.in);
      String kahao=sc.nextLine();
      //判断卡号是否正确
      try {
          Class.forName("oracle.jdbc.driver.OracleDriver");
          Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "test0816", "laoer123");
          Statement st = conn.createStatement();
          ResultSet rs = st.executeQuery("select * from account where a_id='"+kahao+"'");
          //查询用户输入卡号的结果集
         if(rs.next())
         {
             String ss = rs.getString("a_password");
             for(int i=0;i<3;i++)
             {
                 System.out.println("请输入您的密码");
                 Scanner sc2 = new Scanner(System.in);
                 String mima=sc2.nextLine();
                 if(ss.equals(mima))
                 {
                     System.out.println("姓名："+rs.getString("a_name")+"账号："+rs.getString("a_id")+"密码："+rs.getString("a_password")+"身份证号："+rs.getString("a_idcard")+"余额："+rs.getString("a_balance"));
                     System.out.println("请输入您要存款的金额");
                     double qu=sc2.nextDouble();
                     //执行语句
                   double money =rs.getDouble("a_balance");
                     if(qu< money)
                     {

                         money-=qu;
                         String sql ="update account set a_balance="+money+"where a_id ='"+kahao+"'";
                         st.executeUpdate(sql);
                         System.out.println("取款成功");
                     }
                     else
                     {
                         System.out.println("取款失败！");
                     }
                     break;
                 }

                 else
                 {
                     System.out.println("请重新输入密码");
                 }
             }
         }
         else
         {
             System.out.println("您输入的卡号不存在！");
         }
          st.close();
          conn.close();
          } 

      catch (ClassNotFoundException | SQLException e) {
              e.printStackTrace();
      }

  }

ATM测试类

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

import unionpay.ChildATM;

public class TestBank {

    public static void main(String[] args) {
        System.out.println("银行自助终端系统");
        System.out.println("********************");
        System.out.println("0---------------开户");
        System.out.println("1---------------查询");
        System.out.println("2---------------存款");
        System.out.println("3---------------取款");
        System.out.println("4---------------退出");
        ChildATM ca= new ChildATM();
        for(int i=1;i>0;i++){
            System.out.println("请输入您要选择的功能");
            Scanner sc = new Scanner(System.in);
            int num=sc.nextInt();
            switch(num)
            {
                case 0:
                ca.kaihu();
                break;
　　　　　　　　　

                case 1:
                ca.cha();
                break;

                        case 2:
            ca.cunkuan();
            break;            

　　　　　　　　　case 3:
                    ca.qukuan();
                break;
                case 4:
                    System.out.println("您选择的是退出功能，系统将要退出");
                return;

                default:
                    System.out.println("您选择的功能不正确，请重新选择");
                    break;

            }
        }
   }
}