Sun的宠物店源码，学习Java的同志们，不用多介绍了吧-Sun's pet-source, learning Java, the comrades who do not have introduced it

J2EE的实用例子，一个不错的说明文章，对学习J2EE的朋友有很大的帮助。-J2EE practical examples, a good note article on learning J2EE friends will be very helpful.