I want to know how can I download any file from JSP page based on content disposition as an attachment from mail server.
目录1.创建类和创建类对象2.新式类与旧式(经典)类面向对象中两个重要的概念:1.类:对一类事物的描述,是抽象的、概念上的定义。比如做石膏像的模型2.对象:实际存在的该类事物的每个个体,因而也称实例...