在jsp中运行时出现这个错误，该怎么解决啊，急啊！！！！

HTTP Status 500 -

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type Exception report

message

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

exception

javax.servlet.ServletException: Error instantiating servlet class com.dp.controller.UserDealServlet
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:619)


root cause

java.lang.IllegalAccessException: Class org.apache.catalina.core.StandardWrapper can not access a member of class com.dp.controller.UserDealServlet with modifiers ""
    sun.reflect.Reflection.ensureMemberAccess(Reflection.java:65)
    java.lang.Class.newInstance0(Class.java:349)
    java.lang.Class.newInstance(Class.java:308)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    java.lang.Thread.run(Thread.java:619)


note The full stack trace of the root cause is available in the Apache Tomcat/6.0.24 logs.


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在jsp中运行程序时出现这个错，看不懂，请问有没有哪位高手知道怎么解决这个问题啊，急啊！！！！！
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看看你的源代码，
肯定编译都没通过

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500错误：服务器内容错误。服务器由于遇到错误而不能完成请求
是程序的错误，好好看一下程序吧
java.lang.IllegalAccessException: Class org.apache.catalina.core.StandardWrapper can not access a member of class com.dp.controller.UserDealServlet with modifiers ""
这个异常好像是说访问权限的问题，即上面异常中的：can not access
检查一下驱动，导包等

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