import mf.org.apache.xerces.xs.XSLoader; //导入依赖的package包/类
public XSLoader createXSLoader(StringList versions) throws XSException {
 	XSLoader loader = new XSLoaderImpl();
 	if (versions == null){
return loader;
 	}
 	for (int i=0; i<versions.getLength();i++){
 		if (!versions.item(i).equals("1.0")){
	String msg =
		DOMMessageFormatter.formatMessage(
			DOMMessageFormatter.DOM_DOMAIN,
			"FEATURE_NOT_SUPPORTED",
			new Object[] { versions.item(i) });
	throw new XSException(XSException.NOT_SUPPORTED_ERR, msg);
 		}
 	}
 	return loader;
 }
 

import mf.org.apache.xerces.xs.XSLoader; //导入依赖的package包/类
private static XSModel readSchemaInternal(String schemaResource, String schemaText) throws IllegalAccessException, InstantiationException, ClassNotFoundException,
        ConfigurationException, URISyntaxException
{
    LSInputImpl input = null;
    String baseURI = null;
    if (schemaResource != null) {
        URL url = ResourceLoader.resolveClassPathOrURLResource("schema", schemaResource);
        baseURI = url.toURI().toString();
    }
    else {
        input = new LSInputImpl(schemaText);
    }

    // Uses Xerxes internal classes
    DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();
    registry.addSource(new DOMXSImplementationSourceImpl());
    Object xsImplementation = registry.getDOMImplementation("XS-Loader");
    if (xsImplementation == null) {
        throw new ConfigurationException("Failed to retrieve XS-Loader implementation from registry obtained via DOMImplementationRegistry.newInstance, please check that registry.getDOMImplementation(\"XS-Loader\") returns an instance");
    }
    if (!JavaClassHelper.isImplementsInterface(xsImplementation.getClass(), XSImplementation.class)) {
        String message = "The XS-Loader instance returned by the DOM registry class '" + xsImplementation.getClass().getName() + "' does not implement the interface '" + XSImplementation.class.getName() + "'; If you have a another Xerces distribution in your classpath please ensure the classpath order loads the JRE Xerces distribution or set the DOMImplementationRegistry.PROPERTY system property";
        throw new ConfigurationException(message);
    }
    XSImplementation impl =(XSImplementation) xsImplementation; 
    XSLoader schemaLoader = impl.createXSLoader(null);
    XSModel xsModel;
    if (input != null) {
        xsModel = schemaLoader.load((mf.org.w3c.dom.ls.LSInput) input);
    }
    else {
        xsModel = schemaLoader.loadURI(baseURI);
    }

    if (xsModel == null)
    {
        throw new ConfigurationException("Failed to read schema via URL '" + schemaResource + '\'');
    }

    return xsModel;
}