描 述：该程序实现了在Excel中读取学生的E-mail地址、成绩、姓名等，结合Jmail实现成绩单的群发，并加 入了一些出错处理 -Descr iption: This program implements in Excel, read E-mail address of student achievement, name, etc., combined with the mass Jmail achieve transcr ipts, and added some error