In Version 5 of Java Platform, Java Enterprise Edition (formely J2EE) contains major enhancements and improvements.
New Features in JEE 5
- EJB 3.0
- Plain old Java Objects (POJO)
- Standardized Object Relational Mapping
- Support for inheritance and polymorphism
- Java Server Faces 1.2
- Component Based UI Development
- Improved event handling and input validation
- internationalization and accessibility support
- Java API for XML based Web Services 2.0 (JAX-WS 2.0)
- Automatic WSDL generation
- Simpler web service client
- Web Services Metadata
- Annotation based web service definition
- Java Server Pages Standard Tag Library (JSTL) 1.2
- Tag Library for XML Processing
- JAXB 2.0
- support for W3C XML schemas
- easier encoding and decoding of data sent through web service calls
- Easier Java Objects to XML Mapping
- Java Persistence API
- support for integration of third party persistance frameworks
- Easier object-relational mapping
- Streaming API for XML (StAX)
- event based XML parsing
- more read XML parsing code
Advantages of JEE 5
- Faster and Easier Development of Java Enterprise Applicaitons
- Deployment Descriptors are now optional.
- Easy to use syntax for metadata using Annotations.
- Simpler Web Service Support
- support for the REST style of web services
- Better platform for SOA implementation
- Easier implementation of web services
- Increased number of supported standards
