JAVA xml LSParserFilter的应用

LSParserFilter---载入与保存
应用org.w3c.dom 实现XML的载入与保存实例
/**
* 实现DOM3的LS(Load & Save)功能
*
* @author S.Well
* @see org.w3c.dom.DOMErrorHandler
* @see org.w3c.dom.ls.LSParserFilter
*/
public class XML_LS implements DOMErrorHandler, LSParserFilter {
private static final Logger logger = Logger.getLogger(XML_LS.class
.getName());
private static DOMImplementationRegistry registry;
private static LSParser builder;
private static DoBeanXmlTest errorHandler;
private static DOMImplementationLS impl;
private static LSOutput dOut;
private static LSInput dIn;
private static LSSerializer domWriter;
private Document document;
public XML_LS() {
// 这一句是转换使用Xerces包
// System.setProperty(DOMImplementationRegistry.PROPERTY,"org.apache.xerces.dom.DOMXSImplementationSourceImpl");
try {
registry = DOMImplementationRegistry.newInstance();
impl = (DOMImplementationLS) registry.getDOMImplementation("LS");
domWriter = impl.createLSSerializer();
DOMConfiguration config = domWriter.getDomConfig();
config.setParameter("xml-declaration", Boolean.TRUE);
dOut = impl.createLSOutput();
dIn = impl.createLSInput();
// ========================================================
// ====================create DOMBuilder==================
builder = impl.createLSParser(DOMImplementationLS.MODE_SYNCHRONOUS,
null);
// create filter
LSParserFilter filter = new DoBeanXmlTest();
builder.setFilter(filter);
config = builder.getDomConfig();
// create Error Handler
errorHandler = new DoBeanXmlTest();
// set error handler
config.setParameter("error-handler", errorHandler);
// set validation feature
config.setParameter("validate", Boolean.TRUE);
// set schema language
config.setParameter("schema-type",
"http://www.w3.org/2001/XMLSchema");
// config.setParameter("psvi&q