jsp连接oracle我是通过javabean实现的。
当我调试javabean时,没有问题，能够通过java查询出数据，当包含在jsp中就出现了问题。
问题如下：
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.service(JspServletWrapper.java:370)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    net.lybbs.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:170)


root cause

java.lang.NullPointerException
    org.apache.jsp.index_jsp._jspService(org.apache.jsp.index_jsp:145)
    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:322)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    net.lybbs.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:170)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.

会不会与web.xml配置有关系。

望哪位兄弟赐教！谢谢！