package nc.jonathan.velocity;

import java.io.StringWriter;

import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.exception.MethodInvocationException;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;

/**
 *
 第一个velocity学习类 

 *
 *
 采用默认初始化设置，解析字符串, 输出到字符串

 *
 * Create on 2006-4-3 10:12:38
 *
 * @author Jonathan Q. Bo
 * @version 1.0 valocity study
 */

public class QuickStartExample {
 public static void main(String[] args){
  try {
   /* 初始化运行时引擎， 默认初始化 */
   Velocity.init();
   
   /* 建立context， 并放入数据*/
   VelocityContext context = new VelocityContext();
   context.put("project","jonathan's velocity");
   context.put("name","first example");
   
   /* 解析后数据的输出目标，java.io.Writer的子类 */
   StringWriter w = new StringWriter();
   
   /* 此处采用字符串模版 */
   String s = "We are using string velocity to generate $project $name";
   
   /* 进行解析 */
   Velocity.evaluate(context,w,"mystring",s);
   System.out.println(w);
  } catch (ResourceNotFoundException e1) {
   System.out.println("## 源文件不存在！");
   e1.printStackTrace();
  } catch (ParseErrorException e2) {
   System.out.println("## 解析文件错误！");
   e2.printStackTrace();
  } catch (MethodInvocationException e3) {
   System.out.println("## 方法调用异常!");
   e3.printStackTrace();
  } catch (Exception e4){
   System.out.println("## 其他错误!");
   e4.printStackTrace();
  }
 }
}

输出结果

We are using string velocity to generate jonathan's velocity first example