如何获取所有会话值和名称？

Question

如果我在一个会话中有值，并且我需要获取会话中的所有值，如

String[] name = request.getParameterValues("values");
HttpSession session = request.getSession();

for(String temp:name)
{
    if(temp.equalsIgnoreCase("a"))
    {
        session.setAttribute("a", temp);
        out.println("a is Running<br>");
    }

    if(temp.equalsIgnoreCase("b"))
    {
        session.setAttribute("b", temp);
        out.println("b is Running<br>");
    }

    if(temp.equalsIgnoreCase("c"))
    {
        session.setAttribute("c", temp);
        out.println("c is Running<br>");
    }

    if(temp.equalsIgnoreCase("d"))
    {
        session.setAttribute("d", temp);
        out.println("d is Running<br>");
    }

    if(temp.equalsIgnoreCase("e"))
    {
        session.setAttribute("e", temp);
        out.println("e is Running<br>");
    }

    if(temp.equalsIgnoreCase("f"))
    {
        session.setAttribute("f", temp);
        out.println("f is Running<br>");
    }
}

• 如果我将一组复选框值转换为字符串。Im 将.jsp中选择的所有值设置为会话对象。我只需要检索保存在上述代码中的jsp中的选定值。

Answer 1

Enumeration keys = session.getAttributeNames();
while (keys.hasMoreElements()){
   String key = (String)keys.nextElement();
   out.println(key + ": " + session.getValue(key) + "<br>");
}

此代码在jsp上工作

Answer 2

        Enumeration e = (Enumeration) (session.getAttributeNames());

        while ( e.hasMoreElements())
        {
            Object tring;
            if((tring = e.nextElement())!=null)
            {
                out.println(session.getValue((String) tring));
                out.println("<br/>");
            }

        }

这个代码也工作得很好，感谢spark回复@karim mohsen

Answer 3

Enumeration<String> attributes = request.getSession().getAttributeNames();
while (attributes.hasMoreElements()) {
    String attribute = (String) attributes.nextElement();
    System.out.println(attribute+" : "+request.getSession().getAttribute(attribute));
}