找不到getServletContext()方法

[garykgliu]

环境eclipse
Event event = new CreateAirSoEvent(bookingNo, session.getServletContext().getRealPath("/"));

编译说：The method getServletContext() is undefined for the type HttpSession
怎么回事呢？麻烦救人

[眼急手块]

Event event = new CreateAirSoEvent(bookingNo,getServletContext().getRealPath("/"));

[garykgliu]

getServletContext()又不是静态方法，怎么可以这样调用呢？