Hi, Christopher
Just an idea to get you started. If I remember correctly, an
IllegalStateException can be thrown if you obtain a Writer to the
ServletOutputStream more than once, e.g. calling Request.getWriter, and then
calling Request.getInputStream. From your code, I can't tell whether you're
doing so, but I do know that a JSP will try to obtain a Reader from the request
object. That means any stream- or writer-related accesses in your bean are
suspect. You can also investigate by looking in the working subdirectory where
Tomcat creates the servlets from JSPs. The variable names be a bit cryptic, but
this should help you debug your exception dumps.
Hope this helps.
Regards,
Noel Lecaros
> Christopher Benson wrote:
>
> I created a bean that can be called from a JSP or by directly instantiating it
> from main(). The bean uses an XML file and an XSLT file, both of which are
> valid. When I run the bean using the main() method, it works correctly and
> prints the correct HTML output to the console. However, when I call the bean
> from the JSP below in Tomcat, it gives me the following error:
>
> java.lang.IllegalStateException: Response has already been committed
>
> I already know that an IllegalStateException "signals that a method has been
> invoked at an illegal or inappropriate time. In other words, the Java
> environment or Java application is not in an appropriate state for the
> requested operation."
>
> I don't know how to solve it though. Any ideas?
>
> Thanks,
> Christopher Benson
> [EMAIL PROTECTED]
> =====================================================
> package com.christopherbenson;
>
> import java.io.*;
> import javax.xml.transform.*;
> import javax.xml.transform.stream.*;
>
> public class TransformationBean
> {
>
> public TransformationBean(){}
>
> public static void main(String[] args)
> throws Exception
> {
> TransformationBean bean = new TransformationBean();
> try
> {
> bean.setXMLdoc("C:/Temp/test.xml");
> bean.setXSLTdoc("C:/Temp/test.xsl");
> String x = bean.getResult();
> System.out.println(x);
> }
> catch (Exception e)
> {
> System.out.println(e.toString());
> }
> }
>
> private String xmlsource = null;
> private String xsltsource = null;
>
> public void setXMLdoc(String xmldoc)
> throws FileNotFoundException, IOException
> {
> BufferedReader in = new BufferedReader(new FileReader(xmldoc));
> String s, s2 = new String();
> while((s = in.readLine())!= null)
> s2 += s + "\n";
> in.close();
> xmlsource = s2;
> }
>
> public void setXSLTdoc(String xsltdoc)
> throws FileNotFoundException, IOException
> {
> BufferedReader in = new BufferedReader(new FileReader(xsltdoc));
> String t, t2 = new String();
> while((t = in.readLine())!= null)
> t2 += t + "\n";
> in.close();
> xsltsource = t2;
>
>
> }
>
> public String getResult()
> throws TransformerException, TransformerFactoryConfigurationError,
> TransformerConfigurationException, IOException //SAXException
> {
> try
> {
> TransformerFactory tFactory = TransformerFactory.newInstance();
> Transformer transformer = tFactory.newTransformer(new StreamSource(new
> StringReader(xsltsource)));
> StringWriter resultWriter = new StringWriter();
> StreamResult TheResult = new StreamResult(resultWriter);
> transformer.transform(new StreamSource(new StringReader(xmlsource)),
> TheResult);
> String result = resultWriter.toString();
> return result;
> }
> catch (Exception e)
> {
> String result = e.getMessage();
> return result;
> }
> }
>
> }
> =====================================================
>
> <%@ page language="java" %>
> <jsp:useBean id="bean" class="com.christopherbenson.TransformationBean" />
> <%
> bean.setXMLdoc("C:/Temp/test.xml");
> bean.setXSLTdoc("C:/Temp/test.xsl");
> String result = bean.getResult();
> out.println(result);
> %>
>
> =====================================================
>
>
