Conclusion
The J2EE platform is a platform-independent and full systems-integration solution that creates an open marketplace in which every vendor can sell to every customer. Such a marketplace encourages vendors to compete, not by trying to lock customers into their technologies, but by trying to outdo each other by providing products and services that benefit customers, such as better performance, better tools, and better customer support.
The J2EE APIs enable systems and applications integration as follows:
Unified application model across tiers with enterprise beans
Simplified response and request mechanism with JSPs and servlets
Reliable security model with JAAS API
XML-based data interchange integration with the JAXP API
Simplified interoperability ...
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