Velocity Iterator Tool Example

This Example shows you how to use Iterator in velocity template.

Velocity Iterator Tool Example

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Velocity Iterator Tool Example

     

This Example shows you how to use Iterator in velocity  template. The method used in this example are described below:- 

1:- Initialize velocity run time engine through method  init().
2:- Create object of VelocityContext Class.
3:- Create Template class object, Template  class object is used for controlling template methods and properties.

template.merge(context, writer): Merge method of the Template class is used here for merging  the VelocityContext class object to produce the output. Template  class object is used for controlling template methods and properties.

#set($list = ["A", "B", "C", "D"]): This is a statement named 'set', generally begins with # character. Here we have assign the list with character $. 

#foreach($items in $item): This is just same as the for loop statement of java.

 

 

IteratorClass.java

import java.io.*;

import org.apache.velocity.*;
import org.apache.velocity.app.*;
import org.apache.velocity.tools.generic.*;

public class IteratorClass {

  public static void main(String[] args) throws Exception {
  Velocity.init();

  Template template = Velocity.getTemplate("./src/Iterator.vm");

  VelocityContext context = new VelocityContext();
  context.put("var", new IteratorClass());

  Writer writer = new StringWriter();
  template.merge(context, writer);

  System.out.println(writer);
  }
}

Iterator.vm
#set($list = ["A", "B", "C", "D"])

#set($item = $var.wrap($list))

#foreach($items in $item)
  #if($velocityCount <= 3)
  $item.more()
  #end
#end

Output:
A
B
C

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