此代码主要是 一个用JAVA实现的ASN.1的编译器，能实现正常的ASN.1的编码和解码过程，对学习ASN的同学有帮助。-This code is mainly a JAVA implementation of the ASN.1 compiler, to achieve normal ASN.1 encoding and decoding process, the students learn ASN helpful.

JAC（JavaAsn1Compiler），可将ASN文件转为Java文件。(JAC(JavaAsn1Compiler), from ASN to Java.)