看了很多篇关于tomcat的安装，还是不能解决我的问题
我来简单的描述一下，我可以看到本地的tomcat服务器，也就是http://localhost:8080,我可以看得到，完后我把jsp的应用放到webapps里面，可是访问相应的jsp却显示如下信息。已经很久了，不知道怎么解决，高手帮我++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
sun.jdbc.odbc.JdbcOdbcDriver.initialize(JdbcOdbcDriver.java:436)
sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:153)
java.sql.DriverManager.getConnection(DriverManager.java:525)
java.sql.DriverManager.getConnection(DriverManager.java:193)
com.guestbook.DBConnection.getConnectionToAccess(DBConnection.java:31)
org.apache.jsp.index_jsp._jspService(index_jsp.java:82)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs. 另外我这个用户怎么不能放附件？？？？我想抓图给大家看 请问你是看哪个教程，我怎么装了N次连localhost都连不上:L 看起来像数据库没连上 此问题应是JSP页面上出错了，按异常所说应是引用了未初始化的变量。如楼上所说，请检查数据库链接是否正确，是否获得你所需的值
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