JSP连接数据库问题，请帮帮我！

1.JDK装好了，C:\Program Files\Java\jdk1.6.0_10\bin
2.Tomcat装好了，C:\Program Files\Apache Software Foundation\Tomcat 6.0\bin
3.环境变量配好了，classpath：C:\Program Files\Java\jdk1.6.0_10\lib\mysql-connector-java-5.1.7-bin.jar;C:\Program Files\Java\jdk1.6.0_10\lib\tools.jar;D:\mysql-connector-java-5.1.7\mysql-connector-java-5.1.7-bin.jar
path：C:\Program Files\StormII;C:\Program Files\Java\jdk1.6.0_10\bin;
4.mysql装好了，MySQL Server 5.1
5.mysql-connector-java-5.1.7-bin.jar放在D盘下，并且我在C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\DB\WEB-INF也放了。
6.JSP代码也写好了放在C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\DB\Db.jsp

可是运行时，就是通不过，我把浏览器的错误代码附上，请帮帮我，我怎么做才能连上数据库，谢谢您！！！


HTTP Status 500 -  

--------------------------------------------------------------------------------

type Exception report

message  

description The server encountered an internal error () that prevented it from fulfilling this request.

exception  

org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:156)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause  

org.apache.jasper.JasperException: Unable to load class for JSP
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:600)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:144)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause  

java.lang.ClassNotFoundException: org.apache.jsp.Db_jsp
(Unknown Source)
java.security.AccessController.doPrivileged(Native Method)
(Unknown Source)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:134)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:66)
org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:598)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:144)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


note The full stack trace of the root cause is available in the Apache Tomcat/6.0.14 logs.