The following files are part of this code snippet;
1.XMLVelocityExample.java
2.xml.vm
3.book.xml
Here goes the Java code i.e. XMLVelocityExample.java:
import org.apache.velocity.Template; import org.apache.velocity.VelocityContext; import org.apache.velocity.app.Velocity; import org.jdom.Document; import org.jdom.input.SAXBuilder; import java.io.BufferedWriter; import java.io.OutputStreamWriter; import java.io.Writer; public class XMLVelocityExample { public XMLVelocityExample(String templateFile) { Writer writer = null; try { Velocity.init(); SAXBuilder builder; Document root = null; try { builder = new SAXBuilder("org.apache.xerces.parsers.SAXParser"); root = builder.build("book.xml"); } catch (Exception exception) { exception.printStackTrace(); } VelocityContext context = new VelocityContext(); context.put("root", root); Template template = Velocity.getTemplate(templateFile); writer = new BufferedWriter(new OutputStreamWriter(System.out)); template.merge(context, writer); } catch (Exception ex) { ex.printStackTrace(); } finally { if (writer != null) { try { writer.flush(); writer.close(); } catch (Exception ex) { ex.printStackTrace(); } } } } public static void main(String[] args) { XMLVelocityExample test = new XMLVelocityExample("xml.vm"); } }
xml.vm looks like:
#macro ( recursive $xml $indent ) #if( $xml.getChildren().size() > 0 ) $indent <$xml.getName()> #foreach ($child in $xml.getChildren() ) #recursive( $child "$indent " ) #end $indent </$xml.getName()> #else $indent <$xml.getName()> $indent $xml.getTextTrim() $indent </$xml.getName()> #end #end #set($i = " ") Here goes document tree with a recursive Velocity macro : #recursive( $root.getRootElement() $i ) Now accessing data directly : email : $root.getRootElement().getChild("properties").getChild("author").getChild("email").getText() last name : $root.getRootElement().getChild("properties").getChild("author").getChild("name").getChild("fullname").getText()
book.xml file looks like:
<?xml version="1.0" encoding="UTF-8"?> <document> <properties> <author> <email>sunnyg@sunnyg.com</email> <name> <lastname> Gavaskar </lastname> <first> Sunil </first> <fullname>Sunil Gavaskar</fullname> </name> </author> <title> Sunny Days </title> </properties> <body> Sunny within a body. </body> </document>
This is how output looks like:
Here goes document tree with a recursive Velocity macro : <document> <properties> <author> <email> sunnyg@sunnyg.com </email> <name> <lastname> Gavaskar </lastname> <first> Sunil </first> <fullname> Sunil Gavaskar </fullname> </name> </author> <title> Sunny Days </title> </properties> <body> Sunny within a body. </body> </document> Now accessing data directly : email : sunnyg@sunnyg.com last name : Sunil Gavaskar
0 comments:
Post a Comment