新學 struts.今日在跟蹤一個JSP頁面錯誤 錯誤提示如下:
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at org.apache.struts.taglib.logic.CompareTagBase.condition(CompareTagBase.java:121) at org.apache.struts.taglib.logic.EqualTag.condition(EqualTag.java:43) at org.apache.struts.taglib.logic.ConditionalTagBase.doStartTag(ConditionalTagBase.java:160) at jsp_servlet._air._export._jobcosting.__pop_add_cost_mawb._jspService(__pop_add_cost_mawb.java:2783) at weblogic.servlet.jsp.JspBase.service(JspBase.java:35) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378) at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109) at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:99) at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.SessionFixationProtectionFilter.doFilterHttp(SessionFixationProtectionFilter.java:53) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.wrapper.SecurityContextHolderAwareRequestFilter.doFilterHttp(SecurityContextHolderAwareRequestFilter.java:92) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:278) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.logout.LogoutFilter.doFilterHttp(LogoutFilter.java:90) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:194) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:176) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:168) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:100) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:70) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at weblogic.servlet.internal.RequestDispatcherImpl.invokeServlet(RequestDispatcherImpl.java:503) at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:251) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1084) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:295) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:396) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:348) at com.kln.sdk.KLNRequestProcessor.process(KLNRequestProcessor.java:410) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1914) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:450) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:821) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:378) at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109) at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109) at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.SessionFixationProtectionFilter.doFilterHttp(SessionFixationProtectionFilter.java:68) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.wrapper.SecurityContextHolderAwareRequestFilter.doFilterHttp(SecurityContextHolderAwareRequestFilter.java:92) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.AbstractProcessingFilter.doFilterHttp(AbstractProcessingFilter.java:278) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.ui.logout.LogoutFilter.doFilterHttp(LogoutFilter.java:90) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.context.HttpSessionContextIntegrationFilter.doFilterHttp(HttpSessionContextIntegrationFilter.java:235) at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:54) at org.springframework.security.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:390) at org.springframework.security.util.FilterChainProxy.doFilter(FilterChainProxy.java:176) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:168) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:100) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:97) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:43) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(Unknown Source) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
這個頁面總共有3000多行,而且是算年代比較久遠的代碼.裏面參數眾多,逐個慢慢排除的話,頗為不智.
通過
at org.apache.struts.taglib.logic.CompareTagBase.condition(CompareTagBase.java:121)
at org.apache.struts.taglib.logic.EqualTag.condition(EqualTag.java:43)
大致判斷出來是某個<logic:equal>的標籤出問題
在http://www.cnblogs.com/weeky/archive/2012/11/14/JSP.html 這個篇中有介紹JSP的基本原理.出問題的JSP頁面是pop_add_cost_mawb.JSP.它對應的java類就是_pop_add_cost_mawb.class 因為我用的是weblogic 所以我們可以在weblogic的目錄下 搜索_pop_add_cost_mawb.class .
找到它然後用反編譯工具打開(我用的是JAVA Decompiler 下載路徑http://download.csdn.net/detail/sadtime200/4802594).從上面錯誤堆棧中看到出問題的在2783行
如此在結合JSP頁面的源碼 找出有問題的Tag.下面的操作就不在敘述.