利用java代码在网页中实现验证码功能,通过对参数的传递,利用最简单的方法实现验证码的高级操作-Using java code to implement the verification code on the page function, passing through parameters, using the most simple way to achieve high-level operation verification code

深入理解 Java 虚拟机-Jvm 高级特性与最佳实践-Deep understanding of the Java virtual machine- the Jvm advanced features and best practices