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How do i use an Entity Resolver Interface

 
Greenhorn
Posts: 5
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Can someone kindly tell me how do i use an Entity Resolver interface. I tried using it, but i got an Exception -
org.xml.sax.SAXParseException: File "file:///C:/samples/book.dtd" not found.
My current working directory is C:/samples
and The DOCTYPE Statement in the xml file is
<!DOCTYPE main SYSTEM "book.dtd">
I want to place the book.xml and book.dtd files in some other directory.
the following is the code implemnting the resolveEntity method.
public InputSource resolveEntity(java.lang.String publicId, java.lang.String systemId) throws SAXException, IOException
{
if (systemId.equals("book.dtd"))
{
try
{
return new InputSource(file:///Some directory/book.xml");
}
catch(Exception e)
{
System.out.println("EXCEPTION = "+e);
return null;
}
}
else
{
return null;
}
}
Where have i gone wrong??
 
Ranch Hand
Posts: 152
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The InputSource constructor that takes a String
is looking for the System Identifier. Try moving
that fully qualified URI
file:///Some directory/book.xml
up into the <DOCTYPE> in place of the
"book.dtd" in your example.
And the InputSource constructor call in your
example is missing a quote, but the compiler should
complain loud and clear about that.
Joe
 
author
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You have checked that the file "c:\samples\book.dtd" really does exist?!
I'd suggest replacing "c:/" with "c|/" (i.e. replacing the colon with a vertical bar) or removing it altogether.
i.e.
"file:///C|/samples/book.dtd" or "file:///samples/book.dtd"
David
[This message has been edited by David Peterson (edited December 05, 2001).]
 
Sheriff
Posts: 5782
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Your name liinaa does not comply with the JavaRanch naming policy. We require names to have at least two words, separated by a space, and strongly recommend that you use your full real name. Please spare a moment and re-register with a name that meets the requirements.
Thanks!
 
Greenhorn
Posts: 1
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I remember having the ruffly the same problem. I ended putting the dtd in a jarfile and retrieving it with Class.getResourceAsStream(String) instead. This way you do not have to worry about where the dtd is placed in relation to the xml file.
 
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