Question

tomcat下正常，weblogic发布后无法进入登陆页面，错误代码如下，求大侠指点

Error 500--Internal Server Error

java.lang.NullPointerException
at java.io.File.(File.java:222)
at com.dareway.ostm.webapp.taglib.CssTag.existsFile(CssTag.java:93)
at com.dareway.ostm.webapp.taglib.CssTag.getData(CssTag.java:75)
at com.dareway.ostm.webapp.taglib.CssTag.doStartTag(CssTag.java:46)
at jsp_servlet.__login._jsp__tag4(__login.java:324)
at jsp_servlet.__login._jspService(__login.java:142)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:301)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3730)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3696)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2273)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2179)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1490)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)

Answer 1

at jsp_servlet.__login._jsp__tag4(__login.java:324)
at jsp_servlet.__login._jspService(__login.java:142)

login.jsp里面有错误