Show basic XML handling in a template
/*
* Copyright 2000,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.Writer;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.Template;
import org.apache.velocity.app.Velocity;
import org.jdom.Document;
import org.jdom.input.SAXBuilder;
/**
* Example to show basic XML handling in a template.
*
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @version $Id: XMLTest.java,v 1.2.12.1 2004/03/04 00:18:30 geirm Exp $
*/
public class XMLTest
{
public XMLTest( String templateFile)
{
Writer writer = null;
try
{
/*
* and now call init
*/
Velocity.init();
/*
* build a Document from our xml
*/
SAXBuilder builder;
Document root = null;
try
{
builder = new SAXBuilder( "org.apache.xerces.parsers.SAXParser" );
root = builder.build("./src/test.xml");
}
catch( Exception ee)
{
System.out.println("Exception building Document : " + ee);
return;
}
/*
* now, make a Context object and populate it.
*/
VelocityContext context = new VelocityContext();
context.put("root", root);
/*
* make a writer, and merge the template 'against' the context
*/
Template template = Velocity.getTemplate(templateFile);
writer = new BufferedWriter(new OutputStreamWriter(System.out));
template.merge( context , writer);
}
catch( Exception e )
{
System.out.println("Exception : " + e);
}
finally
{
if ( writer != null)
{
try
{
writer.flush();
writer.close();
}
catch( Exception ee )
{
System.out.println("Exception : " + ee );
}
}
}
}
public static void main(String[] args)
{
XMLTest t;
t = new XMLTest("./src/xml.vm");
}
}
-------------------------------------------------------------------------------------
//File: test.xml
<?xml version="1.0" encoding="UTF-8"?>
<document>
<properties>
<author>
<email>velocity-user@jakarta.apache.org</email>
<name>
<last>
<full>Team</full>
<firstinitial>T</firstinitial>
</last>
<first>
Velocity
</first>
</name>
</author>
<title>
The Jakarta Project
</title>
</properties>
<body>
I am the body
</body>
</document>
-------------------------------------------------------------------------------------
//File: xml.vm
#macro ( recursive $e $indent )
#if( $e.getChildren().size() > 0 )
$indent <$e.getName()>
#foreach ($child in $e.getChildren() )
#recursive( $child "$indent " )
#end
$indent </$e.getName()>
#else
$indent <$e.getName()>
$indent $e.getTextTrim()
$indent </$e.getName()>
#end
#end
#set($i = " ")
First, we print out the document tree with a
recursive Velocimacro :
#recursive( $root.getRootElement() $i )
Next, we access pieces of data directly :
email : $root.getRootElement().getChild("properties").getChild("author").getChild("email").getText()
last name : $root.getRootElement().getChild("properties").getChild("author").getChild("name").getChild("last").getChild("full").getText()
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