Parsing an XML file with a DTD schema on a relative path

Question

I have the following java code:

DocumentBuilder db=DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc=db.parse(new File(\"/opt/myfile\         


        

Answer 1

You need to use a custom EntityResolver to tweak the path of the DTD so that it can be found. For example:

db.setEntityResolver(new EntityResolver() {
    @Override
    public InputSource resolveEntity(String publicId, String systemId)
            throws SAXException, IOException {
        if (systemId.contains("schema.dtd")) {
            return new InputSource(new FileReader("/path/to/schema.dtd"));
        } else {
            return null;
        }
    }
});

If schema.dtd is on your classpath, you can just use getResourceAsStream to load it, without specifying the full path:

return new InputSource(Foo.class.getResourceAsStream("schema.dtd"));