获取session的几种方法

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HttpServletRequest request = ServletActionContext.getRequest();

String RealRandomCode = (String) request.getSession().getAttribute("rand");

2.在jsp页面获取session

session.setAttribute("rand",sRand);

3.在spring的controller获取session

HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();

 String string = (String) request.getSession().getAttribute("randomCode");

//获取response 的方法

HttpServletResponse response = 

((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getResponse();