Velocity字符串模板替换

示例：

 

 

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