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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 39581] New: - Maybe the Jasper translate jsp to wrong java code.
Date Mon, 15 May 2006 03:24:02 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=39581

           Summary: Maybe the Jasper translate jsp to wrong java code.
           Product: Tomcat 5
           Version: 5.5.17
          Platform: PC
        OS/Version: Windows 2000
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Jasper
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: james05y@gmail.com


1. In my first jsp, i write the the two lines code:

<jsp:useBean class="cn.edu.zqu.SimpleBean" id="simpleBean" scope="session" />
<jsp:getProperty name="simpleBean" property="university" />

it works.
--------------------
the translated code is:
out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString((((cn.edu.zqu.SimpleBean)_jspx_page_context.findAttribute("simpleBean")).getUniversity())));



2. But, in my second jsp, i reuse the simpleBean:

<jsp:getProperty name="simpleBean" property="sex"/>

the jsp dosen't work.

--------------------
the translated code is:
out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString(org.apache.jasper.runtime.JspRuntimeLibrary.handleGetProperty(_jspx_page_context.getAttribute("simpleBean",
PageContext.PAGE_SCOPE), "sex")));




*********************************************
exception

org.apache.jasper.JasperException: Attempted a bean operation on a null object.
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause 

org.apache.jasper.JasperException: Attempted a bean operation on a null object.
org.apache.jasper.runtime.JspRuntimeLibrary.handleGetProperty(JspRuntimeLibrary.java:601)
	org.apache.jsp.studentInfo_jsp._jspService(studentInfo_jsp.java:75)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

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