Question

For example, we have the next bunch: Struts, Spring, Hibernate. Can you help me understand the role played by each of the elements?

I know that Hibernate is responsible for all on the database.

But, what role Struts and Spring in this case?

Thanks.

Answer 1

Struts is web application framework – used to give you the possibility to expose your application through web interface without dealing with low level classes. When using struts you should be careful as there often bad advices on using you application logic inside struts classes. Don’t do this, struts is just web front-end.

Spring is general application framework that in first place helps you decouple classes from one another using dependency injection. But this is not the only reason for using spring, it provides tons of other features: http security, aspect oriented programming, out-of-the-box integrations and support of different frameworks. So this gives you a fast start on using different technologies.

Hibernate is object relational mapping. Using it you map your classes to database relations and avoid working with SQL requests.