1. Spring Provides Better Leverage
2. Spring Enables POJO Programming
3. Dependency Injection Helps Testability
4. Inversion of Control Simplifies JDBC
5. Spring‘s Community Thrives
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Technorati tags: Spring Framework
Thoughts on Software Development Trends, Enterprise Architecture, Design, Big Data, and Cloud Computing.
Orange Slate 
Refer some good article on spring at
http://www.technical-tutorials.com/spring3-0/