奇怪的java.lang.NullPointerException

[programpoet]

就剩18分了 哎~~~~

是这样的

我之前使用的是：
jdk-1_5_0_05-windows-i586-p.exe
jakarta-tomcat-5.5.9.exe

eclipse-SDK-3.2-win32.zip
MyEclipseEnterpriseWorkbenchInstaller_5.0.1GA_E3.2.exe
Access

小项目做完发到tomcat里运行正常
后来因为需要我换了

j2sdk-1_4_2_06-windows-i586-p
jakarta-tomcat-5.0.28.exe

之后 刚到index.jsp时就出现错误


错误提示如下：



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.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

java.lang.NullPointerException
org.apache.struts.util.RequestUtils.pageURL(RequestUtils.java:1596)
org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:541)
org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:436)
org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:396)
org.apache.struts.taglib.logic.RedirectTag.doEndTag(RedirectTag.java:294)
org.apache.jsp.index_jsp._jspx_meth_logic_redirect_0(index_jsp.java:157)
org.apache.jsp.index_jsp._jspx_meth_html_html_0(index_jsp.java:117)
org.apache.jsp.index_jsp._jspService(index_jsp.java:68)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.


大侠们帮看看，谢谢了啊
是jdk 1.5 和 1.4的区别使然吗？
还是tomcat版本还是什么问题？谢谢大家了

[奇伢]

第一页的代码有问题index.jsp?

[wunan320]

感觉是lz的jsp页面头部声明taglib时候出错了 看下路径对不对

[programpoet]

index.jsp里面只就一个

<logic:redirect page="/list.do"></logic:redirect><br>

标签

[programpoet]

大家踊跃啊~~~~~~~~

[许飘大叔]

<logic:redirect page="/list.do"></logic:redirect>

路劲问题？

[programpoet]

有可能是JDK版本问题

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

我想也是这个问题，但是如何修改页面才能改好呢？

[zhj92lxs]

有可能是JDK版本问题