谁能看懂jsp的错误信息呀,帮我看看

[ydhj]

我的jsp页面调用一个bean执行数据库操作,操作成功了,但是jsp页面却返回一个错误页面,如下所示,请大家帮我看看,多谢!
Error: 500
Location: /jspdev/004_new.jsp
Internal Servlet Error:

javax.servlet.ServletException
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:461)
at _0002f_00030_00030_00034_0005fnew_0002ejsp004_0005fnew_jsp_40._jspService(_0002f_00030_00030_00034_0005fnew_0002ejsp004_0005fnew_jsp_40.java:303)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:536)

Root cause:
java.lang.NullPointerException
at cls004.updateSQL(cls004.java:106)
at _0002f_00030_00030_00034_0005fnew_0002ejsp004_0005fnew_jsp_40._jspService(_0002f_00030_00030_00034_0005fnew_0002ejsp004_0005fnew_jsp_40.java:177)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:536)

[Leemaasn]

你把你相关jsp和bean的代码和一些注释贴出来看看吧？

[x0y1z2]

说了阿，空指针，好像是004_new.jsp中 cls004.updateSQL的cls004为空

[shdxy]

java.lang.NullPointerException
空指针错误，原因是记录集不存在或取字段的顺序不对，应该按顺序取

[Lihaitao312]

学习中

[dugang106]

好象是connection没有建立

[junyi2003]

同意：z2xx(羽逸) :

空指针，看一下work目录下的cls004.java的106排吧

[zn7726]

请问shdxy(知心爱人) ，您是怎么看出错误原因是“记录集不存在或取字段的顺序不对，应该按顺序取”的呀？请明示

[z2xx]

空指针，看一下work目录下的cls004.java的106排吧