Getting Started with Spring Boot
History and Background of Spring Framework Spring Framework is a Java-based enterprise application framework that first appeared in 2003. Its core ideas were introduced earlier by Rod Johnson in his 2002 book “Expert One-on-One J2EE Design and Development.” Spring emerged as an alternative to the complex and heavyweight EJB (Enterprise JavaBeans) 2.x model of the time, promoting a lighter approach built on POJOs (Plain Old Java Objects). EJB 2.x was tightly coupled to application containers, made unit testing difficult, and relied heavily on XML configuration. Spring addressed those problems by making IoC (Inversion of Control) and DI (Dependency Injection) its central concepts, which reduced coupling and improved testability. ...