2020-02-16 标签:jsp,基础,速成,精华,讲解,servlet,三个,要素,必须,继承,httpservlet,实现,doget,dopost,web,xml

Servlet三个要素: 1.必须继承自HttpServlet 2.必须实现doGet()或者doPost() 3.必须在web.xml中配置Servlet HttpServeltRrequest:请求对象 getParameter():获得表单元素的值 getAttribu