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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();