一个例子，基于ejb技术的Hello程序，完整的实现了ejb的整体框架。通过该简单的例子，你能很容易的明白ejb的实现原理和机制，能快速入门，有助于ejb的学习 -an example, based on the Hello Bob technical procedures, the integrity of Bob achieve an overall framework. Through the simple example, you can easily understand Bob's theory and mechanism, rapid entry, Bob helps learning