Managing transactions(Chapter 6 of Spring In Action)

　　Spring supports both programmatic and declarative transaction management. In either case, Spring shields you from having to work directly with a specific transaction management implementation by abstracting the transaction management platform behind a common API.　　Spring employs its own AOP framework to support declarative transaction management. Spring’s declarative transaction support rivals that of EJB’s CMT, enabling you to declare more than just propagation behavior on POJOs, including isolation levels, read-only optimizations, and rollback rules for specific exceptions.