import com.sun.xml.internal.org.jvnet.staxex.XMLStreamWriterEx; //导入依赖的package包/类
protected void handleCharacters() throws XMLStreamException {

        CharSequence c = null;

        if (optimizeBase64Data) {
            c = ((XMLStreamReaderEx)in).getPCDATA();
        }

        if ((c != null) && (c instanceof Base64Data)) {
            if (mtomAttachmentMarshaller != null) {
                Base64Data b64d = (Base64Data) c;
                ((XMLStreamWriterEx)out).writeBinary(b64d.getDataHandler());
            } else {
                try {
                    ((Base64Data)c).writeTo(out);
                } catch (IOException e) {
                    throw new XMLStreamException(e);
                }
            }
        } else {
            for (int start=0,read=buf.length; read == buf.length; start+=buf.length) {
                read = in.getTextCharacters(start, buf, 0, buf.length);
                out.writeCharacters(buf, 0, read);
            }
        }
    }
 

import com.sun.xml.internal.org.jvnet.staxex.XMLStreamWriterEx; //导入依赖的package包/类
public StAXExStreamWriterOutput(XMLStreamWriterEx out) {
    super(out);
    this.out = out;
}
 

import com.sun.xml.internal.org.jvnet.staxex.XMLStreamWriterEx; //导入依赖的package包/类
public StAXExStreamWriterOutput(XMLStreamWriterEx out) {
    super(out, NoEscapeHandler.theInstance);
    this.out = out;
}
 

import com.sun.xml.internal.org.jvnet.staxex.XMLStreamWriterEx; //导入依赖的package包/类
/**
 * Writes the buffer as a fragment, meaning
 * the writer will not receive start/endDocument events.
 * Any inscope namespaces present will be written as namespace
 * delcarations on each top-level element.
 * <p>
 * If {@link XMLStreamBuffer} has a forest, this method will write all the forests.
 */
public void writeFragment(XMLStreamWriter writer) throws XMLStreamException {
    if (writer instanceof XMLStreamWriterEx) {
        writeFragmentEx((XMLStreamWriterEx)writer);
    } else {
        writeFragmentNoEx(writer);
    }
}