What is Spring?

Spring is an open source J2EE application framework initiated by Rod Johnson. It is a lightweight container that manages the bean life cycle.

Spring solves many common problems that developers encounter in J2EE development and provides powerful IOC, AOP and Web MVC functions.

Spring can be used alone to build applications, or it can be used in combination with many web frameworks such as Struts, Webwork, Tapestry, etc., and can be combined with desktop application APs such as Swing.

Therefore, Spring can not only be used in J2EE applications, but also in desktop applications and small applications.

The Spring framework mainly consists of seven parts, namely Spring Core, Spring AOP, Spring ORM, Spring DAO, Spring Context, Spring Web and Spring Web MVC.

Spring Certification (Spring Professional Certification) is designed to test and validate students' understanding and familiarity with core aspects of Spring and Spring Boot, such as: configuration, component scanning, AOP, data access and transactions, REST, security, auto-configuration, actuators,

Spring boot testing, etc.