[apcausey]

Hi,

I’m getting the following error in one of my JSP files:

 'cannot access <class-name>: bad class file: <path-to-class-file>
NOTE: no JSP line number was available so line 1 was used for the marker.

The class file that it’s referring to contains a method that I’m using in one of my custom JSTL functions in the JSP. The code works fine, and I’m getting the expected results when the JSP loads.

Thanks.

[Don Nelson]

Would be useful if you posted more information – such as your jsp file, and perhaps your controller class.

Don

[apcausey]

Here’s the relevant part of my JSP file:

<%@ taglib prefix="vcufn" uri="http://opa.vcu.edu/jstl/functions"%>
.
.
.

<td style="text-align: center">
                            
                                <html:link href="strutsaction/showform.do?fid=${formId}${vcufn:createBackParam(pageContext, true)}">Details</html:link>
                        </td>

Here’s the taglib definition in the web.xml:

<jsp-config>
        <taglib>
            <taglib-uri>http://opa.vcu.edu/jstl/functions</taglib-uri>
            <taglib-location>/WEB-INF/vcu-functions.tld</taglib-location>
        </taglib>
    </jsp-config>

Here’s the function method(s):

 /**
     * 
     * @param requestParams
     * @return
     */
    public static String createBackParam(PageContext pageContext, boolean append)
            throws Exception {

        try {
            return createBackParam((HttpServletRequest) pageContext
                    .getRequest(), append);

        } catch (Exception e) {
            log.error("Exception: ", e);
            throw e;
        }
    }

    /**
     * 
     * @param requestParams
     * @return
     */
    public static String createBackParam(HttpServletRequest request,
            boolean append) throws Exception {

        try {
            // get the query string of the current URL
            String queryString = request.getQueryString();

            // create the value for the back parameter
            String paramValue = URLEncoder.encode(((String) request
                    .getSession().getAttribute(
                            SessionAttributeKeys.STRUTS_ACTION_PATH))
                    .substring(1)
                    + (queryString != null ? "?" + queryString : ""), "UTF-8");

            // Return the query string for going back to the previous page. If
            // append is true, then there is already a query string for the url.
            return (append ? "&" : "?") + "back=" + paramValue;

        } catch (Exception e) {
            log.error("Exception: ", e);
            throw e;
        }
    }

This is the TLD file contents:

<?xml version="1.0" encoding="UTF-8" ?>

<taglib xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd" 
    version="2.0"> 

    <tlib-version>1.1</tlib-version>
    <short-name>vcufn</short-name>
    <uri>http://opa.vcu.edu/jstl/functions</uri>

    <function>
        <name>createBackParam</name>
        <function-class>edu.vcu.opa.jsp.functions.JspFunctions</function-class>
        <function-signature>java.lang.String createBackParam(javax.servlet.jsp.PageContext, boolean)</function-signature>
    </function>

</taglib>

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