如何将速度代码转换为freemarker代码

Question

    public static String evaluateByVelocity(final String template, final Map<String, ?>... placeHolders) throws Exception {

    final StringWriter writer = new StringWriter();

    try {
        Velocity.init();

        final VelocityContext context = new VelocityContext();
        // context.put("esc", new EscapeTool());
        if (placeHolders != null) {
            for (final Map plh : placeHolders) {
                copyIntoContext(context, plh);
            }
        }

        Velocity.evaluate(context, writer, "LOG", template);
        return writer.getBuffer().toString();
    } catch (final Exception ex) {
        ex.printStackTrace();
        throw new Exception(ex);
    } finally {
        writer.close();
    }
}

我正在尝试将此方法转换为freemarker

public static String evaluateByFreemarker(final String template, final Map<String, ?>... placeHolders) throws Exception {

    final StringWriter writer = new StringWriter();

    try {

        // Instantiate an engine through Configuration Class
        Configuration cfg = new Configuration();
        cfg.setObjectWrapper(ObjectWrapper.BEANS_WRAPPER);

        if (placeHolders != null) {
            for (final Map plh : placeHolders) {
                plh.put(placeHolders, plh);
            }
        }

        return writer.getBuffer().toString();
    } catch (final Exception ex) {
        ex.printStackTrace();
        throw new Exception(ex);
    } finally {
        writer.close();
    }
}

我对这部分代码感到震惊

Velocity.evaluate(context, writer, "LOG", template);

freemarker中是否有任何内置方法可以替换上面的代码