VTD实现XML报文重写。

	@Test
	public void testOverWrite() throws Exception{
		VTDGen vg = new VTDGen();
		vg.setDoc("<root><item>1</item><item>2</item><item>3</item><item>4</item></root>".getBytes());
		HashMap m = new HashMap();
		m.put("1","A");
		m.put("2","B");
		m.put("3","C");
		m.put("4","D");
		
		vg.parse(true);
		VTDNav vn = vg.getNav();
		AutoPilot ap = new AutoPilot(vn);
		XMLModifier xm = new XMLModifier(vn);
		ap.selectXPath("//item");
		while(ap.evalXPath() > -1){
			System.out.println(vn.toString(vn.getText()));
			xm.updateToken(vn.getText(),(String)m.get(vn.toString(vn.getText())));
		}
		ByteArrayOutputStream os = new ByteArrayOutputStream();
		xm.output(os);
		System.out.println(os.toString());
		os.flush();
		os.close();
	}