基于SAX解析xml的封装

使用示例:

      XMLParser parser = new XMLParser(ParserTest.class.getResourceAsStream("/contact.xml"));
      XMLObject result = parser.getResult();
      System.out.println(result.getTagName());
      System.out.println(result.getSingleTag("contact"));
      for (XMLObject item : result.getChildren()) {
          System.out.println(item);
      }