Good morning,
I go directly to the heart of the problem,
I work on a web application with struts and hibernate, when I log on two page of the same post and is working on the same type of items I have a problem of competition for access to data.
plz if someone can help me find a solution I will be grateful
thank you in advance

How have you configured and set up locking for the database?

If the data is locked, the collisions shouldn't corrupt data, and the duration of a web transaction should be short, so the data shouldn't be locked for very long.