怎么把一个velocity的表达式放到a标签的href中啊？比如说$id=1 <a href="ssss?id=此处填写" 变成这个样子<a href="ssss?id=1"
http://lihong11.iteye.com/blog/1538201
http://wenku.baidu.com/view/e07af24efe4733687e21aa63.html
http://www.cnblogs.com/yuyijq/archive/2011/05/07/fragment_cache_one.html