关于模板语言Velocity的简单例子

来源：互联网发布：linux服务器虚拟化方案编辑：程序博客网时间：2024/06/06 02:57

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>