我下载的2005数据库驱动地址http://download.microsoft.com/download/5/0/2/502F6CBE-66DA-4F76-BD9A-556D1A4A596D/sqljdbc_1.2.2828.100_chs.exe，里面只有一个jar包，这个可以吗？光盘的视频里讲解我看见的是3个jar包，我下载下来了，可是那个显示是2000的驱动包，2005驱动没有3个的jar包，怎么回事呢？运行完之后没界面显示，数据库连接不上，到底是什么原因呢？用sa登陆数据库又可以登上，难道就是因为Jar包不正确？运行的结果如下：（真的希望可以解决，马上答辩了，很愁人，找不到人帮忙，只有这个网站有点希望帮我，书是你们编写的，代码肯定是可以运行的不是吗，如果解决了，将不胜感激！！！！）
java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at com.mwq.dao.JDBC.<clinit>(JDBC.java:19)
at com.mwq.dao.BaseDao.selectSomeValue(BaseDao.java:62)
at com.mwq.dao.Dao.sUserNameOfNotFreeze(Dao.java:23)
at com.mwq.frame.LandFrame.<init>(LandFrame.java:162)
at com.mwq.DrinkeryManage.<init>(DrinkeryManage.java:16)
at com.mwq.DrinkeryManage$1.run(DrinkeryManage.java:38)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
java.sql.SQLException: No suitable driver found for jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=db_DrinkeryManage
at java.sql.DriverManager.getConnection(DriverManager.java:602)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at com.mwq.dao.JDBC.getConnection(JDBC.java:29)
at com.mwq.dao.BaseDao.selectSomeValue(BaseDao.java:62)
at com.mwq.dao.Dao.sUserNameOfNotFreeze(Dao.java:23)
at com.mwq.frame.LandFrame.<init>(LandFrame.java:162)
at com.mwq.DrinkeryManage.<init>(DrinkeryManage.java:16)
at com.mwq.DrinkeryManage$1.run(DrinkeryManage.java:38)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at com.mwq.dao.BaseDao.selectSomeValue(BaseDao.java:64)
at com.mwq.dao.Dao.sUserNameOfNotFreeze(Dao.java:23)
at com.mwq.frame.LandFrame.<init>(LandFrame.java:162)
at com.mwq.DrinkeryManage.<init>(DrinkeryManage.java:16)
at com.mwq.DrinkeryManage$1.run(DrinkeryManage.java:38)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:642)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:603)
at java.awt.EventQueue$1.run(EventQueue.java:601)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:612)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)