Recently,there is a lightweight framework called Spring that is based upon the theoretics of Ioc and AOP. It uses POJO to build the J2EE application.

• Spring是近来出现的一个使用POJO(纯粹Java对象),以控制倒置(IoC)原则和面向方面编程思想(AOP)为基础的轻量级J2EE开发框架。