xml编写一个文件

<?xml version="1.0" encoding="UTF-8" ?>
<?xml-stylesheet type="text/css" href="test.css" ?>
<bookShelf>
<book>
<bookname>平凡的世界</bookname>
<autor>路遥</autor>
<price>998</price>
</book>
<book>
<bookname>三国演义</bookname>
<autor>罗贯中</autor>
<price>998</price>
</book>
</bookShelf>

bookname{
display:block;
color:red;
font-size:30pt;
}
autor{
display:block;
color:blue;
font-size:40pt;
}
price{
color:yellow;
font-size:80pt;
}