Upgrade rails 2.3.8 project to rails 3

I have created a project using rails 2.3.8.. Now i nee开发者_如何学JAVAd to move rails 3.x.x ..so how can i upgrade my project also?

please tell some tutorial or link to upgrade this?

Start by using the rails upgrade gem. There are several tutorials out on the web that can walk you through what you need to do.

Most importantly, TEST your app thoroughly after doing so.