Java实现ATM取款机程序示例

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.sql.*;
import java.net.URL;
import java.util.Date;
import java.lang.*;
public class DBAccess extends JFrame implements ActionListener{
 private String strDBDriver="com.microsoft.jdbc.sqlserver.SQLServerDriver";      //JDBC驱动器名称
 private String strUrl="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=soft";                         //数据库的URL地址
 private String strDBName="soft";                                //指定访问的数据库名称
 private String strUserName="sa";                                //数据库用户名称
 private String strPassWord="123456";                             //数据库用户密码
 private Connection conTemp=null;                                //数据库连接对象,初始化为空
 private Statement stmtTemp=null;                                //连接的容器对象,初始化为空
 private ResultSet rsTemp=null;                                  //结果集对象,初始化为空
 private int intOperateNum=0;
 private String ATM_id="123456789";                                    //操作记录行数                                 
 
 
 public static void main(String[] args) {         //主方法
  DBAccess d=new DBAccess();
  d.setSize(400,300);
  d.setLocation(300,200);
  d.setTitle("欢迎使用ATM自动取款机");
  d.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  //d.pack();
  d.show();
 }

 
 
 
 public DBAccess()            //构造方法
 {
  try{
   
   Class.forName(strDBDriver).newInstance();
     }
  catch(Exception e)
   {  System.out.print("数据库驱动出错或不存在！");
   e.printStackTrace();
   }
  showCardLayout();
  
 }
 public boolean createConnection(){      //创建与数据库的连接
  boolean blConnect=false;
  try{ conTemp=DriverManager.getConnection(strUrl,strUserName,strPassWord);
  //stmtTemp=conTemp.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
        stmtTemp=conTemp.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
 // conTemp.setCatalog(strDBName);
  
  //conTemp.setAutoCommit(false);
  blConnect=true;}
  catch(Exception e){
   System.out.print("连接出错！");
   e.printStackTrace();}
  return blConnect;
  }