[JavaWeb]随机验证码及防破解处理

/** * @Auther Mr.ZJB * @Date 2020/4/9 */ package cn.edu.mju.Project.Mr.ZJB.Controller; import javax.imageio.ImageIO; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.ser