package com.javachen.velocity;
 
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.exception.MethodInvocationException;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
 
public class HelloVelocity {
	public static void main(String[] args)  {
		try {
                        Velocity.setProperty( Velocity.RUNTIME_LOG_LOGSYSTEM, this);
			Velocity.init();
			VelocityContext context = new VelocityContext();
			context.put("name", "javachen");
			BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
					System.out));
			Template template = Velocity.getTemplate("src/com/javachen/velocity/hello.vm");
			template.merge(context, writer);
			writer.flush();
			writer.close();
		} catch (ResourceNotFoundException e) {
			e.printStackTrace();
		} catch (ParseErrorException e) {
			e.printStackTrace();
		} catch (MethodInvocationException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.Template;
...
/*
 *  create a new instance of the engine
 */
VelocityEngine ve = new VelocityEngine();
/*
 *  configure the engine.  In this case, we are using
 *  ourselves as a logger (see logging examples..)
 */
ve.setProperty(
    VelocityEngine.RUNTIME_LOG_LOGSYSTEM, this);
 
/*
 *  initialize the engine
 */
ve.init();
...
Template t = ve.getTemplate("foo.vm");