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关于模板语言Velocity的简单例子

2012-08-19 17:44 477 查看

import java.io.StringWriter;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import org.apache.velocity.Template;

import org.apache.velocity.VelocityContext;

import org.apache.velocity.app.VelocityEngine;

public class HelloVelocity {

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

// 初始化并取得Velocity引擎

VelocityEngine ve = new VelocityEngine();

ve.init();

// 取得velocity的模版,注意：test.vm放到你的项目根目录,不会src目录

Template t = ve.getTemplate("test.vm","UTF-8");

// 取得velocity的上下文context

VelocityContext context = new VelocityContext();

// 把数据填入上下文

context.put("name", "javaboy2012");

context.put("date", (new Date()).toString());

//将java类实例，填入上下文，在模板中使用

Cal c=new Cal();

context.put("caltool", c);

News news1=new News();

news1.setAuthor("author1");

news1.setId(1);

news1.setTitle("title1");

News news2=new News();

news2.setAuthor("author2");

news2.setId(2);

news2.setTitle("title2");

News news3=new News();

news3.setAuthor("author3");

news3.setId(3);

news3.setTitle("title3");

List<News> items = new java.util.ArrayList<News>();

items.add(news1);

items.add(news2);

items.add(news3);

//把list数据放入上下文，在模板中使用

context.put("items", items);

List temp = new ArrayList();

temp.add("1");

temp.add("2");

context.put("list", temp);

// 输出流

StringWriter writer = new StringWriter();

// 转换输出

t.merge(context, writer);

System.out.println(writer.toString());

}

}

public class Cal {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

}

public static int add(int a,int b)

{

return a+b;

}

}

public class News {

private int id;

private String title;

private String author;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getAuthor() {

return author;

}

public void setAuthor(String author) {

this.author = author;

}

}

<html>

<title>Hello Velocity</title>

<body>

Welcome $name to Javayou.com!

today is $date.

#foreach( $product in $list )

<li>$product</li>

#end

$caltool.add(1,2)

#foreach ($one in $items)

<li> 第 $velocityCount 个 <a href="${one.getId()}" title="${one.getTitle()}">${one.getAuthor()}</a></li>

#end

</body>

</html>

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