Only a type can be imported. package.Class resolves to a package

Question

Hi,
I made a class for database connection named ConnectionClass.class.
The JSPs in public_html directory working fine with import and session variables.
but JSPs under public_html/subdirectory are unable to import this Class and also unable to access session variables.
I have deploy this class under public_html/WEB-INF/classes/ directory.
and also in a jar file vidyabharti.jar under public_html/WEB-INF/lib directory
I am importing it in JSPs like
<%@ page import="vidyabharti.ConnectionClass, java.sql.*" %>
but i am getting following error
An error occurred at line: 6 in the generated java file
Only a type can be imported. vidyabharti.ConnectionClass resolves to a package
An error occurred at line: 110 in the jsp file: /welcome.jsp
ConnectionClass cannot be resolved to a type
109: <%
110: ConnectionClass cs=null;
An error occurred at line: 115 in the jsp file: /welcome.jsp
ConnectionClass cannot be resolved to a type
cs=new ConnectionClass();
i am using Tomcat 5.5.28.
please help me.

Answer 1

Hello,
It's a possible issue whith the JDT compiler version of your tomcat distribution.
You know that jasper is the engine that transform jsp to classes and to achive this goal uses a jdt compiler or the ant task javac compiler.
First check that the JDT compiler class is present in the trace of the exception you have.
If this is the case follow the steps of the tomcat documentation in order to use the ant compiler.
http://tomcat.apache.org/tomcat-5.5-doc/jasper-howto.html
Apache Ant, which was used in previous Tomcat releases, can be used instead instead of the new compiler by simply removing the common/lib/jasper-compiler-jdt.jar file, and placing the ant.jar file from the latest Ant distribution in the common/lib folder. If you do this, you also need to use the "javac" argument to catalina.sh.
If you check the code of the tomcat compilation context seems that you can do the same, without removing any file, by setting the compile parameter of the JspServlet to an arbitrary value diferent from null.
Try this other alternative by editing the file %TOMCAT_HOME%\conf\web.xml
and set the compiler attribute as follow
    <servlet>
        <servlet-name>jsp</servlet-name>
        <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
        <init-param>
            <param-name>fork</param-name>
            <param-value>false</param-value>
        </init-param>
        <init-param>
            <param-name>xpoweredBy</param-name>
            <param-value>false</param-value>
        </init-param>
        <init-param>
            <param-name>compiler</param-name>
            <param-value>Ant</param-value>
        </init-param>
        <load-on-startup>3</load-on-startup>
    </servlet>If this works for your problem we can check the jdt code and perhaps make a patch.
Best reggards,