Velocity字符串模板替换

示例：

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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());    }}

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运行结果:

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

this is a?

?newline test

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