Velocity模版引擎的小例子（so easy）
package com.bcgogo.product.model;import org.apache.velocity.*;import org.apache.velocity.Template;import org.apache.velocity.app.Velocity;import org.apache.velocity.app.VelocityEngine;import org.apache.velocity.exception.ParseErrorException;import org.apache.velocity.exception.ResourceNotFoundException;import org.apache.velocity.runtime.resource.loader.StringResourceLoader;import org.apache.velocity.runtime.resource.util.StringResourceRepository;import java.io.BufferedWriter;import java.io.OutputStreamWriter;import java.util.ArrayList;import java.util.Properties;/** * Created by IntelliJ IDEA. * User: WWW * Date: 12-9-3 * Time: 上午9:58 * To change this template use File | Settings | File Templates. */public class Example { public Example() { try { /* * setup */ Properties p = new Properties(); p.setProperty("runtime.log", "velocity.log"); p.setProperty(VelocityEngine.RESOURCE_LOADER, "string"); p.setProperty("string.resource.loader.class", "org.apache.velocity.runtime.resource.loader.StringResourceLoader"); Velocity.init(p); /* * Make a context object and populate with the data. This * is where the Velocity engine gets the data to resolve the * references (ex. $list) in the template */ VelocityContext context = new VelocityContext(); context.put("list", getNames()); StringResourceRepository repo = StringResourceLoader.getRepository(); String myTemplateName = "goodsStoragePrint"; String myTemplate = "#set( $this = "Velocity")" + "$this is great!" + "#foreach( $name in $list )" + " $name is great!" + "#end" + "#set( $condition = true)" + "#if ($condition)" + " The condition is true!" + "#else" + " The condition is false!" + "#end"; //模板资源存放 资源库 中 /**\ * myTemplateName资源名称 * myTemplate 资源内容 */ repo.putStringResource(myTemplateName, myTemplate); /* * get the Template object. This is the parsed version of your * template input file. Note that getTemplate() can throw * ResourceNotFoundException : if it doesn't find the template * ParseErrorException : if there is something wrong with the VTL * Exception : if something else goes wrong (this is generally * indicative of as serious problem...) */ Template template = null; try { template = Velocity.getTemplate(myTemplateName); } catch (ResourceNotFoundException rnfe) { System.out.println("Example : error : cannot find template " ); } catch (ParseErrorException pee) { System.out.println("Example : Syntax error in template " + ":" + pee); } /* * Now have the template engine process your template using the * data placed into the context. Think of it as a 'merge' * of the template and the data to produce the output stream. */ BufferedWriter writer = new BufferedWriter( new OutputStreamWriter(System.out)); if (template != null) template.merge(context, writer); /* * flush and cleanup */ writer.flush(); writer.close(); } catch (Exception e) { System.out.println(e); } } public ArrayList getNames() { ArrayList list = new ArrayList(); list.add("ArrayList element 1"); list.add("ArrayList element 2"); list.add("ArrayList element 3"); list.add("ArrayList element 4"); return list; } public static void main(String[] args) { Example t = new Example(); }}?