sun的典型开源实例，是sun展示J2EE平台时所用的例子，很有用-sun of a typical example of open source, J2EE platform is the sun to display the example used, very useful

J2EE的经典案例。宠物商店。绝对是值得好好学习的经典源码。学javar必看的源码-Classic case of J2EE. Pet store. Is absolutely worth to learn the classic source. Science javar must-see source