简单的jcaptcha验证码生成工具的使用实例，jdk1.8，tomcat8(Simple example of using the jcaptcha validation tool)

asm源码,版本是5.2，支持jdk1.8及以下的版本。是个可以对字节码操作的java语言写的框架(ASM is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or dynamically generate classes, directly in binary form. Provided common transformat