Hi:

I've got some XHTML documents that I'm using the classes in
java.xml.xpath to find certain tags.  These documents contain a DTD
declaration for XHTML, with a public identifier.  Since my application
needs to work without a network connection, I've downloaded the DTD
and associated entities and made them available to my application as
resources.  I then set an EntityResolver the document builder that I
get from DocumentBuilderFactory.newInstance().  Here's the relevant
code from the resolveEntity method:

url = getClass().getResource (identifierMap.get(publicId));
return new InputSource (url.toString());

When I run the application, I get the following message from the
parser:
com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException:
Invalid byte 1 of 1-byte UTF-8 sequence.

After browsing around a bit, I tried:

url = getClass().getResource (identifierMap.get(publicId));
FileReader reader = new FileReader (new File (url.toURI()));
return new InputSource (reader);

but this had the same problem.

I downloaded the files from the W3C site, both by using FireFox and by
using wget.  In both cases I get the same behavior.

I don't know much about character encodings, so I'm at a loss as to
what to try next.  Any suggestions would be greatly appreciated.

Ryan