We are planning to use Struts+Tiles in our project..
but we had only header and footer in common in all pages...
pages have different tabs and diff buttons etc..so is it worth to use Tiles in our project???
I would say it depends on what you mean by "worth" using Tiles.. if you already know how to use Tiles, setting it up for a simple common header and footer for every page will be very fast. If you are starting from scratch and are wondering if it is worth learning Tiles just to achieve a common header and footer, perhaps not.. especially if you already know another simple way of achieving the desired result.
Mind you, Tiles is not complicated to learn, especially if you're not trying to achieve something complicated.
In my opinion, it is worth it to learn Tiles, since you'll have a simple application of it to start with. It won't be lost that you've learned it, and later on you might want to use some more powerful features.
Hope this helps..