AOP is a Aspect Oriented Programming not a object oriented programming this is a methodology to provide other middle ware services such as security transaction management etc.
Spring AOP is implemented in pure Java. There is no need for a special compilation process. Spring AOP does not need to control the class loader hierarchy, and is thus suitable for use in a J2EE web container or application server.
Spring AOP provides other methodology such as join,join points,point cuts,advice.
Different advice types include are
1 Around advice
2 Before advice
3 Throws advice
4 After returning advice