How to use Map in velocity

This Example shows you how to use map in velocity.

This Example shows you how to use map in velocity.

How to use Map in velocity

This Example shows you how to use map in velocity. 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.

MapClass.java


import java.io.*;

import java.util.*;

import org.apache.velocity.*;

import org.apache.velocity.app.*;



public class MapClass {



  public static void main(String[] args)

  throws Exception {

  VelocityEngine ve = new VelocityEngine();

  ve.init();



  ArrayList list = new ArrayList();

  Map map = new HashMap();



  map.put("rno", "1");

  map.put("name", "komal");

  map.put("libno", 1001);

  list.add(map);



  map = new HashMap();

  map.put("rno", "2");

  map.put("name", "santosh");

  map.put("libno", 1002);

  list.add(map);



  map = new HashMap();

  map.put("rno", "3");

  map.put("name", "ajay");

  map.put("libno", 1003);

  list.add(map);



  VelocityContext context = new VelocityContext();

  context.put("stuList", list);

  Template t = ve.getTemplate("./src/velocity/XMLOutput/xml.vm");

  StringWriter writer = new StringWriter();



  t.merge(context, writer);

  System.out.println(writer.toString());

  }

}

map.vm

Student:


#foreach( $stu in $stuList )

    $stu.rno

  $stu.name

  $stu.libno



#end

Output :

Student:

1

komal

1001



2

Santosh

1002



3

Ajay

1003

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