WebWork 2.2.1发布了，修正了2.2版本的一些bug，与2.2版比较，主要是增加了portlet的支持

这部分代码是Nils-Helge Garli 贡献的

官方提到的特征列表如下：

Improved QuickStart tool makes development easier than ever

Tons more documentation with over 900 PDF pages!

Improved Client side validation using AJAX or plain JavaScript

Updated JSR168/Portlet support for several popular Portal servers, including Pluto, IBM WebSphere, eXo Portal...

New Tags: Debug, UpDownSelect, Tree

Added Maven support

More and better webapp samples

官方站点：

http://www.opensymphony.com/webwork/