import org.apache.tika.metadata.DublinCore; //导入依赖的package包/类
private static void extractMetadatas(Book book, Metadata metadata, ContentHandler contentHandler) {
	book.setAuthor(metadata.get(DublinCore.CREATOR));
	book.setTitle(metadata.get(DublinCore.TITLE));
	book.setContentType(metadata.get(DublinCore.FORMAT));
	book.setContent(contentHandler.toString());
}
 

import org.apache.tika.metadata.DublinCore; //导入依赖的package包/类
private static ContentHandler getDublinCoreHandler(
        Metadata metadata, Property property, String element) {
    return new ElementMetadataHandler(
            DublinCore.NAMESPACE_URI_DC, element,
            metadata, property);
}