Velocity练习：使用vm模板生成最简单的html页面_html/css

需要做的准备工作有：

1、建立一个Java工程，需要引用Velocity相关的jar包，这些jar包可从apache.org下载到最新版本。 下载地址在：http://velocity.apache.org/download.cgi 。我下载的文件是velocity-tools-2.0.zip，将这些文件导入到项目中，就可以使用Velocity进行编码了。

2、安装Eclipse上的Velocity插件Veloedit。因为googlecode被gfw墙掉了，没有条件的朋友们可以安装网上下载到的离线安装版。这里还有一个需要注意，我的Eclipse版本为 Luna Service Release 1 (4.4.1)，这个版本必须要先利用Eclipse自带的update功能，下载“Elipse Tests, Examples, and Extras”。

建立一个JavaProject，取名VelocityTool，里面新建两个java文件。

其中，VelocityHelper.java包含一个Velocity模板转换工具类，代码如下：

import java.io.File;import java.io.FileWriter;import org.apache.velocity.Template;import org.apache.velocity.VelocityContext;import org.apache.velocity.app.Velocity;import org.apache.velocity.app.VelocityEngine;/** * * @文件名称 VelocityHelper.java * @文件作者 Tsybius2014 * @创建时间 2016年5月10日 下午2:14:01 */public class VelocityHelper { /** * * @param inputVmFilePath * @param outputHtmlFilePath * @param context * @throws Exception */ public static void generateHtml(String inputVmFilePath, String outputHtmlFilePath, VelocityContext context) throws Exception { try { Velocity.init(); VelocityEngine engine = new VelocityEngine(); Template template = engine.getTemplate(inputVmFilePath, "gbk"); File outputFile = new File(outputHtmlFilePath); FileWriter writer = new FileWriter(outputFile); template.merge(context, writer); writer.close(); } catch (Exception ex) { throw ex; } }}

VelocityTool.java中有main函数，代码如下：

import java.util.HashMap;import java.util.Vector;import org.apache.velocity.VelocityContext;/** * * @文件名称 VelocityTool.java * @文件作者 Tsybius2014 * @创建时间 2016年5月10日 上午10:03:59 */public class VelocityTool { public static void main(String[] args) { try { VelocityContext context= new VelocityContext(); context.put("name", "Kim Jung-un"); context.put("gender", "Male"); context.put("email", "XXX@XXX.gov"); context.put("job", "Chairman of the WPK"); context.put("company", "Workers' Party Of Korea (WPK)"); context.put("address", "XXXXXXXXX, Pyongyang, North Korea"); context.put("portraitPath", "https://www.gxlcms.com/file:///C:/Users/Tsybius/Desktop/kju.jpg"); HashMap hashMapContact = new HashMap(); hashMapContact.put("Tel", "XXX-XXXXXXXX"); hashMapContact.put("Fax", "XXX-XXXXXXXX"); hashMapContact.put("Mobile", "XXX-XXXX-XXXX"); context.put("contactItems", hashMapContact); Vector vectorRemark = new Vector(); vectorRemark.add("Kim Jong-un is the Chairman of the Workers' Party of Korea and supreme leader of the Democratic People's Republic of Korea (DPRK), commonly referred to as North Korea."); vectorRemark.add("Kim is the son of Kim Jong-il (1941–2011) and the grandson of Kim Il-sung (1912–1994)."); vectorRemark.add("Kim obtained two degrees, one in Physics at Kim Il-sung University, and another as an Army officer at the Kim Il-sung Military University."); vectorRemark.add("Kim was named the World's 46th Most Powerful Person by the Forbes list of The World's Most Powerful People in 2013"); context.put("remarks", vectorRemark); VelocityHelper.generateHtml( "velocity_test.vm", "C:\\Users\\Tsybius\\Desktop\\output.html", context); System.out.println("生成完毕"); } catch (Exception ex) { ex.printStackTrace(); } }}

模板velocity_test.vm是一个存储着人物通讯录的模板，代码如下：

#set($docDesc="VelocityTest")#set($docAuthor="Tsybius2014")#set($docDateTime="2016-05-10 14:29:04")#set($docRemark="none")       
 
 
Address Book - $!{name}
 
 
 
 
 
 
Name:
 
$!{name}
 
Gender:
 
$!{gender}
 
  
 
 
 
E-mail:
 
$!{email}
 
Job:
 
$!{job}
 
 
 
Company:
 
$!{company}
 
 
 
Address:
 
$!{address}
 
 
 
 
 
 
 
 
 
 Contact: 
 
  #foreach($contactItem in $contactItems.entrySet())  #end 
 
 
 
Contact Type
 
Contact Code
 
 
 
$velocityCount
 
$contactItem.key
 
$contactItem.value
 
 
 
 
 
 
 
 
 
 
 
 
 Remark: 
 
  #foreach($remark in $remarks)  #end 
 
[$velocityCount] $remark
 
 
 
 
 
 
 
 

以JavaApplication的方式运行本工程后，生成的HTML页面output.html如下：

       
 
 
Address Book - Kim Jung-un
 
 
 
 
 
 
Name:
 
Kim Jung-un
 
Gender:
 
Male
 
  
 
 
 
E-mail:
 
kim001@northkorea.gov
 
Job:
 
Chairman of the WPK
 
 
 
Company:
 
Workers' Party Of Korea (WPK)
 
 
 
Address:
 
The Dark Side Laboratory, Pyongyang, North Korea
 
 
 
 
 
 
 
 
 
 Contact: 
 
 
 
 
 
Contact Type
 
Contact Code
 
 
 
 
1
 
Tel
 
XXX-XXXXXXXX
 
 
 
 
2
 
Fax
 
XXX-XXXXXXXX
 
 
 
 
3
 
Mobile
 
XXX-XXXX-XXXX
 
 
 
 
 
 
 
 
 
 
 
 
 
 Remark: 
 
 
 
 
[1] Kim Jong-un is the Chairman of the Workers' Party of Korea and supreme leader of the Democratic People's Republic of Korea (DPRK), commonly referred to as North Korea.
 
 
 
[2] Kim is the son of Kim Jong-il (1941–2011) and the grandson of Kim Il-sung (1912–1994).
 
 
 
[3] Kim obtained two degrees, one in Physics at Kim Il-sung University, and another as an Army officer at the Kim Il-sung Military University.
 
 
 
[4] Kim was named the World's 46th Most Powerful Person by the Forbes list of The World's Most Powerful People in 2013
 
 
 
 
 
 
 
 
 

使用 Firefox 46.0.1 打开此页面后效果图如下：

（部分内容摘自对应人物的维基百科页面）

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