What are the various J2EE technologies?

Answer 1

Java 2 Enterprise Edition (J2EE) provides an object-oriented, distributed and cross-platform framework for developing and deploying robust, secure and scalable E-Business and E-Commerce applications. J2EE enables efficient development of enterprise applications, while leveraging investments in existing business resources such as Database Systems, Messaging Systems and Naming and Directory Services. Using J2EE, enterprise developers may implement business objects using the Enterprise JavaBeans (EJB) technology and deploy them across a wide range of J2EE compliant application servers. Enterprise developers may also build sophisticated clients for their E-Business applications using the Java Servlet, Java Server Pages (JSP), XML or the Java Applet technologies. These clients may be packaged and deployed on a Web Container. J2EE enables component-based development of both the business logic and the presentation logic. Using this approach, enables the development of thin HTML, DHTML and JavaScript based clients. J2EE also supports the development of complex clients as regular Java applications and applets.

The J2EE platform provides access to a host of enterprise services using well-defined and standard Java Enterprise APIs that are listed below

Java API for Web Services (JAX-WS)

Java API for XML-Based RPC (JAX-RPC)

Java Architecture for XML Binding (JAXB)

SOAP with Attachments API for Java (SAAJ)

Streaming API for XML (StAX)

Web Service Metadata for the Java Platform, Enterprise JavaBeans (EJB)

Java EE Connector Architecture (JCA)

Java Servlet

Java Server Faces (JSF)