关于DES加密解密的程序，其主程序在FileDES类中运行时使用的例子是本目录下的111.doc文件，运行后自动生成222.doc文件和333.doc文件。

其中111.doc文件加密后的文件是222.doc文件，222.doc文件解密后文件是333.doc文件。-On the DES encryption and decryption process, the main program at run-time class FileDES used example is the catalog under 111.doc documents, running 222.doc automatically generated files and documents 333.doc. 111.doc document which the document is encrypted 222.doc document, 222.doc document after the document was declassified documents 333.doc.