Velocity字符串模板替换

 public class VelocityTest {

     private static Properties props = new Properties();

     static {
         props.setProperty(Velocity.INPUT_ENCODING, "UTF-8");
         props.setProperty(Velocity.RESOURCE_LOADER, "class");
         props.setProperty("class.resource.loader.class",
                 "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
     }

     public static void main(String[] args) {
         testStringVelocity();
         testCommonsStringUtils();
     }

     /**
      * 测试字符串模板替换
      */
     private static void testStringVelocity() {
         // 初始化并取得Velocity引擎
         VelocityEngine engine = new VelocityEngine(props);
         // 字符串模版
         String template = "${owner}：您的${type} : ${bill} 在  ${date} 日已支付成功";
         // 取得velocity的上下文context
         VelocityContext context = new VelocityContext();
         // 把数据填入上下文
         context.put("owner", "nassir");
         context.put("bill", "201203221000029763");
         context.put("type", "订单");
         context.put("date",
                 new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
         StringWriter writer = new StringWriter();
         engine.evaluate(context, writer, "", template);
         System.out.println(writer.toString());

     }

     /**
      * 测试模板静态方法使用
      */
     private static void testCommonsStringUtils() {
         VelocityEngine engine = new VelocityEngine();
         engine.init();
         VelocityContext ctx = new VelocityContext();
         ctx.put("stringUtils", new StringUtils());
         ctx.put("comments", "this is a \n newline test");
         ctx.put("newline", "\n");
         ctx.put("break", "<br/>");
         String template = "#set($comments = $stringUtils.replace($comments,$newline,$break))";
         template += "$comments";
         StringWriter writer = new StringWriter();
         engine.evaluate(ctx, writer, "", template);
         System.out.println(writer.toString());
         // assertEquals("this is a <br /> newline test", writer.toString());
     }
 }

 

 

运行结果:

 

nassir：您的订单 : 201203221000029763 在  2012-03-26 18:13:01 日已支付成功

this is a 

 newline test