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Table of contents
1.
Introduction
2.
Sending XML data in JSP
3.
Processing/Parsing XML data in JSP
4.
Formating XML data in JSP
5.
Frequently Asked Questions
6.
Key Takeaways
Last Updated: Mar 27, 2024

JSP - XML Data

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Introduction

XML stands for an extensible markup language. It is a file format for transmitting, storing, and reconstructing arbitrary data. On the other side, JSP stands for Jakarta Server Pages, which helps create dynamically generated web pages based on HTML, XML, etc. While sending XML data via HTTP, we use JSP to handle the incoming and outgoing XML documents. Creating an XML doc with just some text is more complex than creating it with JSP.

Sending XML data in JSP

Like we send HTML to JSP, we can also XML to JSP the same way except changing the content type of your page to text/xml from text/html. We use the <%@page%> tag for defining the content type in XML.

<%@ page contentType = "text/xml" %>

 

This code will help us to understand how XML data is being sent to browser-

<%@ page contentType = "text/xml" %>
 <novels>
   <novel>
      <name>I too had a love story</name>
      <author>Ravinder</author>
      <price>100</price>
   </novel>
</novels>

 

When we access this XML file on the browser, we will see the following document tree presentation, also known as an XML tree view of the above XML code -

 

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Processing/Parsing XML data in JSP

Before processing XML data in JSP, we need XPath and XML-related files into our two libraries <Tomcat Installation Directory> \ lib directory:

XercesImpl.jar: In this download http://www.apache.org/dist/xerces/j/

xalan.jar: In this download http://xml.apache.org/xalan-j/index.html

We will first create novel.xml file:-

<?xml version="1.0"?>
<novels>
   <novel>
      <name>I too had a love story</name>
      <author>Ravinder</author>
      <price>100</price>
   </novel>
   
   <novel>
      <name>Harry potter</name>
      <author>J. K. rowling</author>
      <price>2000</price>
   </novel>
</novels>
 Now create main.jsp file in same directory and write the following code -
<%@ taglib prefix = "c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix = "x" uri="http://java.sun.com/jsp/jstl/xml" %>
 
<html>
   <head>
      <title>JSTL x:parse Tags</title>
   </head>


   <body>
      <h3>Novels Info:</h3>
      <c:import var = "novelInfo" url="http://localhost:8080/novel.xml"/>
 
      <x:parse xml = "${novelInfo}" var = "output"/>
      <b>The title of the first novel is</b>: 
      <x:out select = "$output/novels/novel[1]/name" />
      <br>
      
      <b>The price of the second novel</b>: 
      <x:out select = "$output/novels/novel[2]/price" />
   </body>
</html>

We will visit http://localhost:8080/main.jsp to see the output.

Output:

Formating XML data in JSP

For formatting, we will create an XSLT stylesheet style.xsl file and write the following code in it -

<?xml version = "1.0"?>
<xsl:stylesheet xmlns:xsl = "http://www.w3.org/1999/XSL/Transform" 
   version = "1.0">
 
   <xsl:output method = "html" indent = "yes"/>
   <xsl:template match = "/">
      <html>
         <body>
            <xsl:apply-templates/>
         </body>
      </html>
   </xsl:template>
    
   <xsl:template match = "novels">
      <table border = "1" width = "100%">
         <xsl:for-each select = "novel">
            <tr>
               <td>
                  <i><xsl:value-of select = "name"/></i>
               </td>
               
               <td>
                  <xsl:value-of select = "author"/>
               </td>
               
               <td>
                  <xsl:value-of select = "price"/>
               </td>
            </tr>
         </xsl:for-each>
      </table>
   
   </xsl:template>
</xsl:stylesheet>

And corresponding to this XSLT stylesheet style.xsl file create main.jsp file within which the above stylesheet will be applied -

<%@ taglib prefix = "c" uri = "http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix = "x" uri = "http://java.sun.com/jsp/jstl/xml" %>
 
<html>
   <head>
      <title>JSTL x:transform Tags</title>
   </head>
   
   <body>
      <h3>Novels Info:</h3>
      <c:set var = "xmltext">
         <novels>
            <novel>
               <name>I too had a love story</name>
               <author>Ravinder</author>
               <price>100</price>
            </novel>
            
            <novel>
               <name>Harry Potter</name>
               <author>J. K. Rowling</author>
               <price>2000</price>
            </novel>
         </novels>
      </c:set>
 
      <c:import url = "http://localhost:8080/style.xsl" var = "xslt"/>
      <x:transform xml = "${xmltext}" xslt = "${xslt}"/>
   </body>
</html>

And now if you go to http://localhost:8080/style.xsl you will see the following output.

Output:

You can also read about the JSP Architecture and Lifecycle.

Must Read Apache Server

Frequently Asked Questions

1.Give some advantages of XML.

  • Any simple editor can edit and view an XML document that contains plain text.
  • XML documents are platform-independent.
  • The XML document can be transmitted easily and take less space as they are Unicode-based.
  • We can represent the XML data in a tree structure, making it easy to understand.

2.Why do we use Tomcat?

  • Up-to-date versions of the servlet specs and JSP is supported by Tomcat.
  • Tomcat is open-source.
  • Without configuring a separate Web server, we can run it standalone.

Key Takeaways

In this blog, we learned about XML data in JSP. Don't come to a halt here. Check out our Top 8 Java Projects on GitHub | Coding Ninjas Blog. Can you also check out the JSP blogs? Check out more blogs here. More Blogs.

Happy Learning!

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