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]
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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;
}
}
}
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%@ 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);
%
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