无涯教程-XPath - Boolean Operators函数 XPath定义以下与XPath表达式一起使用的布尔运

XPath定义以下与XPath表达式一起使用的布尔运算符。

S.No.	Operator & 描述
1	and 满足两个条件
2	or 任何要满足的条件
3	not() 检查条件不满足的功能。

S.No.

Operator & 描述

and

满足两个条件

任何要满足的条件

not()

检查条件不满足的功能。

示例

本示例通过遍历每个学生，创建一个<student>元素的表，其属性为rollno，其子元素为<firstname>，<lastname> <nickname>和<marks>。它检查rollno为393或493，然后打印学生详细信息。

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>
<h2>Students</h2>
        </span><span class="tag">&lt;table</span><span class="pln"> </span><span class="atn">border</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"1"</span><span class="tag">&gt;</span><span class="pln">
           </span><span class="tag">&lt;tr</span><span class="pln"> </span><span class="atn">bgcolor</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"#9acd32"</span><span class="tag">&gt;</span><span class="pln">
              </span><span class="tag">&lt;th&gt;</span><span class="pln">Roll No</span><span class="tag">&lt;/th&gt;</span><span class="pln">
              </span><span class="tag">&lt;th&gt;</span><span class="pln">First Name</span><span class="tag">&lt;/th&gt;</span><span class="pln">
              </span><span class="tag">&lt;th&gt;</span><span class="pln">Last Name</span><span class="tag">&lt;/th&gt;</span><span class="pln">
              </span><span class="tag">&lt;th&gt;</span><span class="pln">Nick Name</span><span class="tag">&lt;/th&gt;</span><span class="pln">
              </span><span class="tag">&lt;th&gt;</span><span class="pln">Marks</span><span class="tag">&lt;/th&gt;</span><span class="pln">
           </span><span class="tag">&lt;/tr&gt;</span><span class="pln">
				
           </span><span class="tag">&lt;xsl:for-each</span><span class="pln"> </span><span class="atn">select</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"class/student[(@rollno=393) or ((@rollno=493))]"</span><span class="tag">&gt;</span><span class="pln">
				
              </span><span class="tag">&lt;tr&gt;</span><span class="pln">
                 </span><span class="tag">&lt;td&gt;&lt;xsl:value-of</span><span class="pln"> </span><span class="atn">select</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"@rollno"</span><span class="tag">/&gt;&lt;/td&gt;</span><span class="pln">
                 </span><span class="tag">&lt;td&gt;&lt;xsl:value-of</span><span class="pln"> </span><span class="atn">select</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"firstname"</span><span class="tag">/&gt;&lt;/td&gt;</span><span class="pln">
                 </span><span class="tag">&lt;td&gt;&lt;xsl:value-of</span><span class="pln"> </span><span class="atn">select</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"lastname"</span><span class="tag">/&gt;&lt;/td&gt;</span><span class="pln">
                 </span><span class="tag">&lt;td&gt;&lt;xsl:value-of</span><span class="pln"> </span><span class="atn">select</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"nickname"</span><span class="tag">/&gt;&lt;/td&gt;</span><span class="pln">
                 </span><span class="tag">&lt;td&gt;&lt;xsl:value-of</span><span class="pln"> </span><span class="atn">select</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="atv">"marks"</span><span class="tag">/&gt;&lt;/td&gt;</span><span class="pln">
              </span><span class="tag">&lt;/tr&gt;</span><span class="pln">
           </span><span class="tag">&lt;/xsl:for-each&gt;</span><span class="pln">
        </span><span class="tag">&lt;/table&gt;</span><span class="pln">
     </span><span class="tag">&lt;/body&gt;</span><span class="pln">
  </span><span class="tag">&lt;/html&gt;</span><span class="pln">

</xsl:template>
</xsl:stylesheet>

验证输出

无涯教程-XPath - Boolean Operators函数

示例

students.xml

students.xsl

验证输出

参考链接