如何在java中设置session属性？ [英] How to set session attribute in java?

问题描述

我可以在scriptlet中设置session属性，但是当我尝试在java类中设置session属性时，它会显示错误，例如session无法解析。
那么如何在java中设置会话？

I am able to set session attribute in scriptlet but when I am trying to set session attribute inside java class it shows error like "session cannot be resolved". So how to set session in java?

<%String username = (String)request.getAttribute("un");
session.setAttribute("UserName", username);%>

推荐答案

通过Java类，我假设你的意思是一个Servlet class作为任意Java类中的设置会话属性没有意义。你可以在你的servlet的doGet / doPost方法中做这样的事情

By Java class, I am assuming you mean a Servlet class as setting session attribute in arbitrary Java class does not make sense.You can do something like this in your servlet's doGet/doPost methods

public void doGet(HttpServletRequest request, HttpServletResponse response) {

    HttpSession session = request.getSession();
    String username = (String)request.getAttribute("un");
    session.setAttribute("UserName", username);
}

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