velocity之使用函数对web-inf文件夹下模板进行解析加载

package com.velocity.test;

import java.io.StringWriter;
import java.util.Properties;

import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;

/**

 * 从file(文件)中加载模板文件 

 *122_add.vm在web-inf/vm/文件夹中

 * @author welcome

 *

 */
public class LoaderFromFile
{

    

    public static void main(String[] args) throws Exception{

        //初始化参数
        Properties properties=new Properties();

        //设置velocity资源加载方式为class
        properties.setProperty("resource.loader", "file");

        //设置velocity资源加载方式为file时的处理类
        properties.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, 

          this.getClass().getResource("/").toString().replaceAll("^file:/", "").replaceAll("classes","vm"));

        //实例化一个VelocityEngine对象
        VelocityEngine velocityEngine=new VelocityEngine(properties);

        

        //实例化一个VelocityContext
        VelocityContext context=new VelocityContext();

        //向VelocityContext中放入键值
        context.put("username", "张三");

        context.put("password", "123456789");

        context.put("age", "20");

        context.put("address", "陕西西安"); 

        context.put("blog", "http://blogjava.net/sxyx2008");

        //实例化一个StringWriter
        StringWriter writer=new StringWriter();

        

        Template template =velocityEngine.getTemplate("122_add.vm"); 
        template.merge(context, writer);  
  System.out.println(writer);

        

        //velocityEngine.mergeTemplate("hello.vm", "gbk", context, writer);
        System.out.println(writer.toString());

    }

}