servlet请求setAttibute和getParameter java出现问题

在我的jsp中，属性和参数是不同的。在设置属性时，使用getAttribute（）获取值

@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    request.setAttribute("orden", 11);
    System.out.println("ord "+request.getParameter("orden"));//returns null
    request.getRequestDispatcher("/view/a.jsp").forward(request, response);
}

//Why does this happen?

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您正在设置

属性

并试图获取

参数

System.out.println("ord "+request.getAtribute("orden"));

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您如何在JSP中访问它？

request.setAttribute("orden", 11);
request.getAttribute("orden");