Question

is there any difference between:

• add “@Transactional” annotation to whole class
• add for every single method “@Transactional” annotation ?

Using spring and Hibernate ?

Answer 1

Basically, if you annotate the class with @Transactional all methods will be transactional.
If you don’t, you can annnotate as @Transactional only those methods you want to. Additionally, you can specify different attributes for each method, like isolation, propagation, timeout, …

Also, take a look at this question, this is a possible duplicate of it: Hibernate transaction annotations in source — difference between class and method level use?