问StAX - writeCharacters()，如何不转义汉字、日语字符？

EN

public static void main(String[] args) throws Exception {  
    // GBK  
    System.out.println("JVM default charset = " + Charset.defaultCharset());  

    String s = "汉语, English, にほんご";  

    XMLOutputFactory output = XMLOutputFactory.newInstance();  
    output.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES, false);  

    OutputStream out = new FileOutputStream("C:/aa.txt");  
    XMLStreamWriter writer = output.createXMLStreamWriter(out, "UTF-8");  
    // When output encoding is "UTF-8", result is something like:  
    // <?xml version='1.0' encoding='UTF-8'?><a>汉语, English, にほんご</a>  

    // When output encoding is "GBK", result is something like:  
    // <?xml version='1.0' encoding='GBK'?><a>&#x6c49;&#x8bed;, English, &#x306b;&#x307b;&#x3093;&#x3054;</a>  

    writer.writeStartDocument();  
    writer.setDefaultNamespace("http://c");  
    writer.writeStartElement("http://c", "a");  

    writer.writeCharacters(s);  
    writer.writeEndElement();  
    writer.flush();  
}