import jdk.internal.org.xml.sax.XMLReader; //导入依赖的package包/类
/**
 * Parse the content given {@link org.xml.sax.InputSource}
 * as XML using the specified
 * {@link org.xml.sax.helpers.DefaultHandler}.
 *
 * @param is The InputSource containing the content to be parsed.
 * @param dh The SAX DefaultHandler to use.
 *
 * @throws IllegalArgumentException If the <code>InputSource</code> object
 *   is <code>null</code>.
 * @throws IOException If any IO errors occur.
 * @throws SAXException If any SAX errors occur during processing.
 *
 * @see org.xml.sax.DocumentHandler
 */
public void parse(InputSource is, DefaultHandler dh)
    throws SAXException, IOException
{
    if (is == null) {
        throw new IllegalArgumentException("InputSource cannot be null");
    }

    XMLReader reader = this.getXMLReader();
    if (dh != null) {
        reader.setContentHandler(dh);
        reader.setEntityResolver(dh);
        reader.setErrorHandler(dh);
        reader.setDTDHandler(dh);
    }
    reader.parse(is);
}
 

import jdk.internal.org.xml.sax.XMLReader; //导入依赖的package包/类
/**
 * Returns the {@link org.xml.sax.XMLReader} that is encapsulated by the
 * implementation of this class.
 *
 * @return The XMLReader that is encapsulated by the
 *         implementation of this class.
 *
 * @throws SAXException If any SAX errors occur during processing.
 */
public abstract XMLReader getXMLReader() throws SAXException;
 

import jdk.internal.org.xml.sax.XMLReader; //导入依赖的package包/类
/**
 * Returns the {@link org.xml.sax.XMLReader} that is encapsulated by the
 * implementation of this class.
 *
 * @return The XMLReader that is encapsulated by the
 *         implementation of this class.
 *
 * @throws SAXException If any SAX errors occur during processing.
 */
public XMLReader getXMLReader()
        throws SAXException {
    return parser;
}