Java Tutorial/JSTL/XML Path

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Output XML with Select Statement

   <source lang="java">

<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %> <html> 

 <head>
   <title>xml actions</title>
 </head>
 <body>
   This example embeds stuff...
   <p/>
   <c:set var="someXML">
     <person>
       <name>Ruth</name>
       <age>29</age>
     </person>
   </c:set>
   <x:parse var="parsedDocument" xml="${someXML}" />
   <x:out select="$parsedDocument/*" /> 
 </body>

</html></source>





Parse XML and Path Select

   <source lang="java">

<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %> <html> 

 <head>
   <title>Parse Examples</title>
 </head>
 <body>Please enter an XML file:
 

 <form method="post">
   <textarea rows="10" cols="50" name="xml">
     <students>
       <student id="1">
         <name>
           <first>A</first>
           <last>B</last>
           <middle>T</middle>
         </name>
         <grade>
           <points>88</points>
           <letter>B</letter>
         </grade>
       </student>
       <student id="2">
         <name>
           <first>C</first>
           <last>D</last>
           <middle>K</middle>
         </name>
         <grade>
           <points>92</points>
           <letter>A</letter>
         </grade>
       </student>
     </students>
   </textarea>
   

   <input type="submit" />
 </form>
 <c:if test="${pageContext.request.method=="POST"}">
   <x:parse var="doc" xml="${param.xml}"  />
$doc/students/student/name/first 
         <x:out select="$doc/students/student/name/first" />
$doc/students/student[@id=2]/name/first 
         <x:out
         select="$doc/students/student[@id=2]/name/first" />
$doc/students/student[@id=1]/name/first 
         <x:out
         select="$doc/students/student[@id=12]/name/first" />

 </c:if>
 </body>

</html></source>





Parse XML With XPath Expression

   <source lang="java">

<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %> <html> 

 <head>
   <title>xml actions</title>
 </head>
 <body>
   This example parses XML and uses an XPath expression...
   <p/>
   <c:set var="someXML">
     <people>
       <person>
         <name>Mark</name>
         <age>30</age>
       </person>
       <person>
         <name>Ruth</name>
         <age>29</age>
       </person>
     </people>
   </c:set>
   <x:parse var="parsedDocument" xml="${someXML}" />
   Here is a list of people:
    <x:forEach select="$parsedDocument/people/person">
  • <x:out select="name" /> 
    •      </x:forEach>

 </body>

</html></source>





Set Variable by Selecting XML Path

   <source lang="java">

<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %> <html> 

 <head>
   <title>Set Examples</title>
 </head>
 <body>
   <c:import var="students" url="students.xml" />
   <x:parse var="doc" xml="${students}" />
   <x:set var="a" select="$doc/students/student/name/first" />
   <x:set var="b"
   select="$doc/students/student[@id=2]/name/first" />
   <x:set var="c"
   select="$doc/students/student[@id=1]/name/first" />
$doc/students/student/name/first 
         <x:out select="$a" />
$doc/students/student[@id=2]/name/first 
         <x:out select="$b" />
$doc/students/student[@id=1]/name/first 
         <x:out select="$c" />

 </body>

</html></source>





Use ForEach Loop to Select XML Path

   <source lang="java">

<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %> <html> 

 <head>
   <title>For Each Examples</title>
 </head>
 <body>
   <c:import var="students" url="students.xml" />
   <x:parse var="doc" xml="${students}" />
<x:forEach var="student" select="$doc/students/student"> </x:forEach>
First Last Points Letter 
           <x:out select="name/first" />

           <x:out select="name/last" />

           <x:out select="grade/points" />

           <x:out select="grade/letter" />

 </body>

</html></source>





Use JSTL to output and extract XML element with XPATH

   <source lang="java">

<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.ru/jstl/xml" prefix="x" %> <html> 

 <head>
   <title>xml actions</title>
 </head>
 <body>
   This example uses XPath and the x:out action to extract the
   user"s name from a piece of XML.
   <p/>
   <c:set var="someXML">
     <person>
       <name>Ruth</name>
       <age>29</age>
     </person>
   </c:set>
   <x:parse var="parsedDocument" xml="${someXML}" />
   The person"s name is <x:out select="$parsedDocument//name" /> 
 </body>

</html></source>


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/JSTL/XML_Path&oldid=3384»