<?xml version="1.0" encoding="UTf-8">
<books>
     <book bookno="001">
        <title>大数据时代</title>
        <author>张三</author>
        <price>50</price>
     </book>
     
     <book bookno="002">
        <title>Andriod开发</title>
        <author>李四</author>
        <price>70</price>
     </book>
</books>

总结：

会书写文档，还得好好学习解析！gogogo