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Written By : Amit
Title :
Struts2 example tutorial

Description :
My First example using Apache Struts2
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Title :
Struts2

Description :
Tags such as IF Iterator Tags
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Written By : guddu
Title :
Struts Eclipse MVC

Description :
Step by step demonstration
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Written By : Girish
Title :
Struts Tiles I18N Example

Description :
Code with Sample Action
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Written By : ISHTEK
Title :
Struts2 questions

Description :
open for discussion
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Written By : ISHTEK
Title :
Struts2 Tiles Example

Description :
with Code and article
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Tags/Keywords : Struts, Struts2 Tutorial, Struts 2 Example, Struts2
Author : ISHTEK
Date (Year/Month/Date): 2009-09-12
Struts2 - XSLT Result type usage example code

Please be informed that NONE of the design/code from this
page is claiming to be some sort of best practices and we DO NOT expect
any of our visitor/reader of this page to assume this as some sort of
best practice for any context and should not be using this 
as it is without appropriate evaluation to their, so to say, 
specific programming context.

This page intends only to provide bit and piece of known ways  for
doing some sort of example and may not be fit for any other purpose.


Using XSL file to render output HTML while using Struts 2.1.6 Framework

There is a specific Result type as XSLTResult, that is defined in the
default Struts XML  file, so is available to use in any Struts 2
framework based application.

In this example I shall be showing one out of several ways by which
one may use a XSL file for rendering HTML output/screen from a
Struts2 based Action/POJO class.

In this example we have a struts.xml file, a POJO, a index.jsp file,
a XSL file, these are placed in appropriate places inside the
web application packaging, for this example it is shown as follows:


/*/WEB-INF/classes/struts.xml
/*/WEB-INF/classes/sample/ExampleXSLTAction.java
/index.jsp
/sources/test.xslt



What I am doing here is to show a screen to enter two values, such as
header and footer. These two text fields are mapped to the two
variables in POJO, "ExampleXSLTAction", and then forwarding to a preview
result having type as "xslt" and style sheet location as the xslt file
located in the sources folder.

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
  <package name="xslt-example" namespace="/sample"
           extends="struts-default">
     <action name="test" class="sample.ExampleXSLTAction"
	                 method="preview">
        <result name="preview" type="xslt">
           <param name="stylesheetLocation">
	        /sources/test.xslt
	   </param>
        </result>
        <result name="input">/index.jsp</result>
     </action>
  </package>
</struts>



When the URL for accessing this example web application as,

http://localhost:8080/struts2sample

Then the index.jsp will be showing the user UI screen as follows:
And the second screen one clicking submit button.




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ExampleXSLTAction.java

package sample;

public class ExampleXSLTAction {
	private String testHeader;
	private String testFooter;
	public void setTestHeader(String arg) {
		testHeader = arg;
	}
	public String getTestHeader(){
		return testHeader;
	}
	public void setTestFooter(String arg) {
		testFooter = arg;
	}
	public String getTestFooter(){
		return testFooter;
	}
    public String preview() throws Exception {
		if((testHeader != null && testHeader.length() >0) &&
			(testFooter != null && testFooter.length() <0))
            return "preview";
		else
            return "input";
	}
}



This POJO class file does only checking of the input values in
these two text fields, testHeader and testFooter.

test.xslt

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="1.0">
<xsl:output method="html"/>
<xsl:template match="result">
<html>
<body>
      <h4><xsl:value-of select="testHeader"/></h4>
      <br/>
      <xsl:value-of select="testFooter"/>
</body>
</html>
</xsl:template>
</xsl:stylesheet>



This XSLT file, takes values from the ExampleXSLTAction object
and displays on screen as shown in this image


And following image shows a very simple way of putting various
major parts/files of this example and the way fields/attributes
are used/referred in each of these files.





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index.jsp

<%@ taglib uri="/struts-tags" prefix="struts2"%>
<html>
<head>
</head>
<body>
<struts2:form method="post" action="test" namespace="/sample">
<table>
<tr><td><struts2:textfield key="testHeader"
                   label="Enter Header :"/></td></tr>
<tr><td><struts2:textfield key="testFooter"
                   label="Enter Footer :"/></td></tr>
<tr><td colspan="2"><struts2:submit value="Register"/></td></tr>
</table>
</struts2:form>
</body>
</html>



This way I could able to pass dynamic values from Action class/POJO
to the XSLT processor for displaying output in HTML format.
Any comments , please write those using below form.

Author of this article/writeup has expressed his/her willingness
to help or guide users with any technical difficulties he/she faces
while working with the example code environment setting up, running
and resolving any such exception raised during compile or at runtime.
You may ask for any technical doubt or seek technical help related to
this article by using following form to reach for technical help
from the Author for FREE.

This article's Author shall be reading your request and responding
within reasonable time (no resolution timeframe defined as such).

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