book = root.addElement("book");
book .addAttribute("name", "ttt\’ttt");
输出就是：<book name="ttt’ttt">

　　
如果我用：
book = root.addElement("book");
book .addAttribute("name", "ttt&apos;ttt");
输出就是：<book name="ttt&amp;apos;ttt">

　　
而我希望的结果是：<book name="ttt&apos;ttt">
<p>