作为技术人员，本文的技术细节涉及到Java语言的基础知识， 您在阅读前应该了解Java动态装载Class的机制，以及常规的Java加密的相关知识， 同时本文假定您已经具有开发web的基本能力， 了解jsp和servlet的运作过程-As technical staff, the technical details of this article relates to the basic knowledge of Java language, you should know before reading Java Dynamic Class loading mechanism, as well as conventional encryption Java knowledge, but this article assumes that you already have the basic web development capabilities, jsp and servlet to understand the operation of the process