Java Enterprise Edition (JEE) is a popular framework for building enterprise-scale applications in Java. It provides a platform that simplifies the development of large, distributed systems by providing a set of standard APIs, a deployment model, and a runtime environment. This article is an introduction to JEE, including its architecture, components, and key features.

Key Features of JEE

Java Enterprise Edition offers a plethora of features that enable developers to build robust, scalable, and secure enterprise applications. Some of the key features of JEE include containerization, which allows multiple applications to run on a single server; integration with various databases and technologies; support for distributed computing and messaging; and standardization of APIs, ensuring portability and interoperability between different JEE implementations.

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Components of JEE: Servlets

Servlets are the key building blocks of Java web applications. They are server-side components that provide a way for developers to dynamically create web pages. By extending the functionality of a web server, servlets can handle various client requests and generate dynamic content based on user input. Servlets enable developers to create web applications that are platform-independent and can run on any server that supports the Java Servlet API.

Components of JEE: JavaServer Pages (JSPs)

JavaServer Pages are one of the many components of Java Enterprise Edition. They are a technology used to create dynamic web pages with Java code embedded in them. JSPs allow web developers to separate the user interface from the business logic, making it easier to manage and maintain large applications. They are compiled into servlets and run on a JEE server like Tomcat or JBoss. It offer a high level of flexibility and can be integrated with many other technologies, such as JavaBeans and XML.

Components of JEE: Enterprise JavaBeans (EJBs)

Enterprise JavaBeans (EJBs) are server-side components of JEE architecture. They provide a framework for creating and managing scalable, distributed, and transactional applications. EJBs encapsulate business logic and can be used to work with databases, messaging systems, and other enterprise resources. They are easily portable, reusable, and maintainable, as they follow the container-managed model and provide declarative and programmatic transaction management. EJBs come in three types: session beans, entity beans, and message-driven beans, each serving a different purpose in the application architecture.

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