What are the roles of the three frameworks in SSH in development?

struts do request processing and **, hibernate does data persistence, spring provides control reversal and AOP services, generally speaking, novices will take some time to understand the role of spring, in layman's terms, it can help you new the class you need, it can be a singleton or a prototype, you can also help you do some interception such as permission interception, internationalization interception, etc., and can also help you manage hibernate such as transaction delivery.

struts is the logical layer, which explains the correspondence between the backend and the frontend, for example, which class should be given to the JSP data for processing.

Spring is the business layer, which is generally used to automatically create some objects for you and decouple.

Hibernate is the data persistence layer, which is the operation on the database.

Struts is responsible for front-end and back-office interactions.

Spring is responsible for reflection and doing transaction control.

Hibernate is responsible for interacting with the database.

Struts is responsible for business interactions.

Spring is responsible for object injection, transaction control, and so on.

Hibernate is responsible for object persistence.

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The respective roles and benefits of SSH:

struts

Struts is a good MVC framework, the main technology is servlet and MVC design can make our logic very clear, so that we can write programs with a clear hierarchy.

spring

Spring provides a consistent way to manage business objects and encourages the injection of good habits of programming interfaces rather than classes, making our products as decoupled as possible.

hibernate

Hibernate is used to persist data and provides fully object-oriented database operations. Hibernate has a very lightweight encapsulation of JDBC, which makes it very easy to deal with relational databases.

Here's a diagram of the SSH architecture:

Spring scheduling, Struts controllers, Hibernate operating databases.