XPath 节点元素

有多种获取和处理元素的方法。

/class/* -选择根节点下的所有元素。

 <xsl:for-each select="/class/*">

/class/student -选择根节点下的所有学生元素。

<xsl:for-each select="/class/student">  
// student -选择文档中的所有学生元素。   
<xsl:for-each select="//student">

示例

在 此示例中,我们创建了一个样本XML文档 students.xml 及其样式表文档 students.xsl,该文档使用XPath表达式。

students.xml

    <?xml version="1.0"?>
    <?xml-stylesheet type="text/xsl" href="students.xsl"?>
    <class>
       <student rollno="393">
          <firstname>Dinkar</firstname>
          <lastname>Kad</lastname>
          <nickname>Dinkar</nickname>
          <marks>85</marks>
       </student>
       <student rollno="493">
          <firstname>Vaneet</firstname>
          <lastname>Gupta</lastname>
          <nickname>Vinni</nickname>
          <marks>95</marks>
       </student>
       <student rollno="593">
          <firstname>Jasvir</firstname>
          <lastname>Singh</lastname>
          <nickname>Jazz</nickname>
          <marks>90</marks>
       </student>
    </class>

students.xsl

  <?xml version="1.0" encoding="UTF-8"?>
    <xsl:stylesheet version="1.0"
       xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> 

       <xsl:template match="/">
          <html>
             <body>
                <h3>Details of each Students. Xpath expression="/class/*"</h3>

                <table border="1">
                   <tr bgcolor="#9acd32">
                      <th>Roll No</th>
                      <th>First Name</th>
                      <th>Last Name</th>
                      <th>Nick Name</th>
                      <th>Marks</th>
                   </tr>

                   <xsl:for-each select="/class/*">
                      <tr>
                         <td><xsl:value-of select="@rollno"/></td>
                         <td><xsl:value-of select="firstname"/></td>
                         <td><xsl:value-of select="lastname"/></td>
                         <td><xsl:value-of select="nickname"/></td>
                         <td><xsl:value-of select="marks"/></td>
                      </tr>
                   </xsl:for-each>
                </table> 

                <h3>Details of each Students. Xpath expression="/class/student"</h3>

                <table border="1">
                   <tr bgcolor="#9acd32">
                      <th>Roll No</th>
                      <th>First Name</th>
                      <th>Last Name</th>
                      <th>Nick Name</th>
                      <th>Marks</th>
                   </tr>    

                   <xsl:for-each select="/class/student">
                      <tr>
                         <td><xsl:value-of select="@rollno"/></td>
                         <td><xsl:value-of select="firstname"/></td>
                         <td><xsl:value-of select="lastname"/></td>
                         <td><xsl:value-of select="nickname"/></td>
                         <td><xsl:value-of select="marks"/></td>
                      </tr>
                   </xsl:for-each>
                </table> 

                <h3>Details of each Students. Xpath expression="//student"</h3>

                <table border="1">
                   <tr bgcolor="#9acd32">
                      <th>Roll No</th>
                      <th>First Name</th>
                      <th>Last Name</th>
                      <th>Nick Name</th>
                      <th>Marks</th>
                   </tr>    

                   <xsl:for-each select="//student">
                      <tr>
                         <td><xsl:value-of select="@rollno"/></td>
                         <td><xsl:value-of select="firstname"/></td>
                         <td><xsl:value-of select="lastname"/></td>
                         <td><xsl:value-of select="nickname"/></td>
                         <td><xsl:value-of select="marks"/></td>
                      </tr>
                   </xsl:for-each>
                </table> 

             </body>
          </html>
       </xsl:template>
    </xsl:stylesheet>

验证输出
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