JSTL -XML Tags

JSTL - XML Tags 

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There are different types of XML tags are available in JSTL under XML tags. Using these tags we can perform task like read XML file, iterate the nodes and also select/choose  a specific node from XML file and so on. 

Many of the XML tags, in JSTL, are very much the same as the 'core' tags. For example,  <x:forEach>, <x:if>, <x:when> etc. 


books.xml

<?xml version="1.0" ?>
<books>           
         <book>
             <title>Java</title>
             <author>roy</author>
    </book>
    <book>
             <title>JavaScript</title>
             <author>herbert</author>
    </book>
    <book>
             <title>C PlusPlus</title>
             <author>robert</author>
    </book>
    <book>
             <title>HTML</title>
             <author>allaire</author>
    </book>
    <book>
             <title>XMLunleashed</title>
             <author>morry</author>
    </book>
    <book>
             <title>C Language</title>
             <author>allaire</author>
    </book>
</books>

XMLdemo1.jsp

<%@ page 	contentType="text/html" %>  
<%@ taglib  prefix="c" uri="http://java.sun.com/jstl/core" %> 
<%@ taglib  prefix="c" >uri="http://java.sun.com/jstl/xml"   %>  

<html>  
<body> 
 
 <c:import   url="books.xml"    var="url" />  
 <x:parse       xml="${url}"     var="doc"   />


<br>

 <x:forEach     var="n"   
          select="$doc/books/book">
 	  <x:out     select="$n/title"  />
	  <br>  
	  <x:out     select="$n/author"  />  
	  <br>
 
 </x:forEach>
</body>
</html>



The following program (demo2)displays the books and authors of xml file  in table format.  

XMLdemo2.jsp

<%@ page contentType="text/html" %>  
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %> 
<%@ taglib prefix="c" >uri="http://java.sun.com/jstl/xml"   %>  

<html>  
<body>  

 <c:import   url="books.xml"    var="url" />  
 <x:parse       xml="${url}"   var="doc" />  
 <table  border=1> 

  <th> 
    <tr> 
     <td>title</td> 
     <td>author</td> 
    </tr> 
   </th>

 <x:forEach  var="n"select="$doc/books/book">
   <td> 
  <tr> <x:out select="$n/title"  /></tr> 
  <tr> <x:out select="$n/author"  /></tr> 
  </td> 
 </x:forEach> 
</table>  
</body>  
</html>


 Think of this as an sql query like

"select * from books where title='javascript'"




demo3.htm

<html>  
<body> 
     SELECT THE TITLE.<BR> 
    YOU WILL GET  TITLE & AUTHOR.  

<form     method="post"  action="demo3.jsp">  

<select name="combo1">
  <option value="xml unleashed">xml
  <option value="c++">c++        
  <option value="coldfusion">cold fusion
  <option value="java">java
  <option  value="cobol">cobol
</select>

<input type=submit>
</form>
</body>
</html>


demo3.jsp  

<%@ page    contentType="text/html" %>  
<%@ taglib  prefix="c" uri="http://java.sun.com/jstl/core"  %>  
<%@ taglib  prefix="c" uri="http://java.sun.com/jstl/xml"  %>  

<html>  
<body>  
 <c:import   url="books.xml"  var="url" />  
 <x:parse  xml="${url}"   var="doc"   /> 
 <c:set    var="s" value="${param.combo1}"/>


<x:forEach  var="n" select="$doc/books/book" >
<x:if select="$n/title=$s" >
<x:out select="$n/title"  />
<br>

<x:out select="$n/author"  />
<br>

</x:if>
</x:forEach>
</body>
</html>

 

 

 

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