The Java platform is the ideal platform for network computing. Java technology unifies business infrastructure to create a seamless, secure, networked platform for your business. The Java platform benefits from a massive community of developers and supporters that actively work on delivering Java technology-based products and services as well as evolving the platform through an open, community-based, standards organization known as the Java Community Process program.

Business Benefits:

The ideal execution environment for Web services - The Java and XML languages are the two most extensible and widely accepted computing languages on the planet, providing maximum reach to everyone, everywhere, every time, to every device and platform. Enabling business from end to end - Java offers a single, unifying programming model that can connect all elements of a business infrastructure.
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. 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

Struts: Apache Struts is a free open-source framework for creating Java web applications. Web applications differ from conventional websites in that web applications can create a dynamic response. Many websites deliver only static pages. A web application can interact with databases and business logic engines to customize a response. The Struts framework is designed to help developers create web applications that utilize MVC architecture.

Spring: A focus of spring is to allow for reusable business and data access objects that are not tied to specific J2EE services. Such objects can be reused across J2EE environments (web or EJB), standalone applications, test environments, etc without any hassle.