FreeMarker(FTL) Hello World Tutorial with Example

File: src/helloworld.ftl

FreeMarker Template example: ${message} 

 

=======================

===  County List   ====

=======================

<#list countries as country>

    ${country_index + 1}. ${country}

</#list>

File: src/net/viralpatel/freemarker/FTLHelloWorld.java

package net.viralpatel.freemarker;

 

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.io.Writer;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

 

import freemarker.template.Configuration;

import freemarker.template.Template;

import freemarker.template.TemplateException;

 

public class FTLHelloWorld {

     

    public static void main(String[] args) {

         

        //Freemarker configuration object

        Configuration cfg = new Configuration();

        try {

            //Load template from source folder

            Template template = cfg.getTemplate("src/main/java/helloworld.ftl");

             

            // Build the data-model

            Map<String, Object> data = new HashMap<String, Object>();

            data.put("message", "Hello World!");

 

            //List parsing

            List<String> countries = new ArrayList<String>();

            countries.add("India");

            countries.add("United States");

            countries.add("Germany");

            countries.add("France");

             

            data.put("countries", countries);

 

             

            // Console output

            Writer out = new OutputStreamWriter(System.out);

            template.process(data, out);

            out.flush();

 

            // File output

            Writer file = new FileWriter (new File("C:\\FTL_helloworld.txt"));

            template.process(data, file);

            file.flush();

            file.close();

             

        } catch (IOException e) {

            e.printStackTrace();

        } catch (TemplateException e) {

            e.printStackTrace();

        }

    }

}

程序運行ok！