請教：NullPointerException 問題

wyl8927發表於2005-07-07
NullException
執行
http://localhost:8080/testWeb/index.jsp時，出現下列提示，

2005-07-07 19:45:35,859 ERROR [com.jg.test.ejb.TestEJBBean] java.lang.NullPointerException
2005-07-07 19:45:35,859 DEBUG [com.jdon.bussinessproxy.dyncproxy.DynamicProxyWeaving] call method:getAllUsers finish!
2005-07-07 19:45:35,859 DEBUG [com.jdon.strutsutil.ModelListAction] listForm 's property: getList size is 0
2005-07-07 19:45:39,171 ERROR [StandardWrapper[/testWeb:jsp]] Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: Unable to compile class for JSP

Generated servlet error:
The method _jspx_meth_html_errors_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (HtmlTag, PageContext)

Generated servlet error:
The method _jspx_meth_bean_write_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (IterateTag, PageContext)

Generated servlet error:
The method _jspx_meth_bean_write_1(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (IterateTag, PageContext)

Generated servlet error:
The method _jspx_meth_bean_write_2(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (IterateTag, PageContext)

Generated servlet error:
The method _jspx_meth_html_link_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (HtmlTag, PageContext)

Generated servlet error:
The method _jspx_meth_MultiPages_pager_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (HtmlTag, PageContext)

Generated servlet error:
The method _jspx_meth_MultiPages_prev_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (MPageTag, PageContext)

Generated servlet error:
The method _jspx_meth_MultiPages_index_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (MPageTag, PageContext)

Generated servlet error:
The method _jspx_meth_MultiPages_next_0(JspTag, PageContext) in the type userlist_jsp is not applicable for the arguments (MPageTag, PageContext)


at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:296)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)

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