} else {
Template tpl = new Template(resource);
PrintWriter out = request.getWriter(contentType);
// ����ģ���ļ��У�${url:relativeUrl}����ת����������URL
tpl.accept(new TextWriter<PrintWriter>(out) {
@SuppressWarnings("unused")
public void visitUrl(String relativeUrl) {
out().print(request.getResourceURL(relativeUrl));
}
});