请教关于java.lang.ClassCastException的问题

Question

请高手帮忙看一下是那里的错误：
Error 500--Internal Server Error 
java.lang.ClassCastException
at jsp_servlet._evaluate.__singleevaluatemanage._jspService(__singleevaluatemanage.java:481)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:996)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:318)
at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:996)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.sinosoft.circreport.reportup.util.ReLoginFilter.doFilter(ReLoginFilter.java:74)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6458)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3661)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2630)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
 

Answer 1

此回复为自动发出,仅用于显示而已，并无任何其他特殊作用
楼主【lcfg229311】截止到2008-07-23 14:08:04的历史汇总数据(不包括此帖)：
发帖的总数量:25                       发帖的总分数:385                      每贴平均分数:15                       
回帖的总数量:22                       得分贴总数量:9                        回帖的得分率:40%                      
结贴的总数量:25                       结贴的总分数:385                      
无满意结贴数:0                        无满意结贴分:0                        
未结的帖子数:0                        未结的总分数:0                        
结贴的百分比:100.00%               结分的百分比:100.00%                  
无满意结贴率:0.00  %               无满意结分率:0.00  %                  
敬礼!

Answer 2

在这里at com.sinosoft.circreport.reportup.util.ReLoginFilter.doFilter(ReLoginFilter.java:74)
报类型转换错误

Answer 3

报的是类型转换的错误！！你看一下你java文件里面的类型转换有问题没有！！还有jsp页面里也会有类型转换！！都要注意！！jsp页面里的类型转换也会出这种问题！！

Answer 4

看看什么地方进行类型转换了
强制转换以前instanceof一下