可以在xml中自己数子节点嘛？
<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
<book id="1">
<name>人生</name>
<author>路遥</author>
<year>2014</year>
<price>89</price>
</book>
<book id="2">
<name>家</name>
<year>2004</year>
<price>77</price>
<language>中文</language>
</book>
</bookstore>
教程说book1有九个子节点，哪九个？
