需要修改Main方法第一行代码的路径为你的books.xml文件绝对路径或相对路径。代码演示了XPath各种语法的使用情况

books.xml

  <book category=\"COOKING\">
    <title lang=\"en\">Everyday Italian</title>
    <author>Giada De Laurentiis</author>
    <year>2005</year>
    <price>30.00</price>
  </book>

  <book category=\"CHILDREN\">
    <title lang=\"en\">Harry Potter</title>
    <author>J K. Rowling</author>
    <year>2005</year>
    <price>29.99</price>
  </book>

  <book category=\"WEB\">
    <title lang=\"en\">XQuery Kick Start</title>
    <author>James McGovern</author>
    <author>Per Bothner</author>
    <author>Kurt Cagle</author>
    <author>James Linn</author>
    <author>Vaidyanathan Nagarajan</author>
    <year>2003</year>
    <price>49.99</price>
  </book>

  <book category=\"WEB\">
    <title lang=\"en\">Learning XML</title>
    <author>Erik T. Ray</author>
    <year>2003</year>
    <price>39.95</price>
  </book>

</bookstore>