Java：IndentingXMLStreamWriter 替代方案

，并添加案例代码。

java
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import java.io.FileOutputStream;
public class StAXExample {
    public static void main(String[] args) {
        try {
            XMLOutputFactory xmlOutputFactory = XMLOutputFactory.newInstance();
            XMLStreamWriter xmlStreamWriter = xmlOutputFactory.createXMLStreamWriter(new FileOutputStream("output.xml"), "UTF-8");
            
            xmlStreamWriter.writeStartDocument("UTF-8", "1.0");
            xmlStreamWriter.writeCharacters("\n");
            xmlStreamWriter.writeStartElement("root");
            xmlStreamWriter.writeCharacters("\n");
            
            xmlStreamWriter.writeStartElement("element");
            xmlStreamWriter.writeAttribute("attribute", "value");
            xmlStreamWriter.writeCharacters("text");
            xmlStreamWriter.writeEndElement();
            xmlStreamWriter.writeCharacters("\n");
            
            xmlStreamWriter.writeEndElement();
            xmlStreamWriter.writeCharacters("\n");
            xmlStreamWriter.writeEndDocument();
            
            xmlStreamWriter.flush();
            xmlStreamWriter.close();
        } catch (XMLStreamException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}