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

问题描述

我可以在 scriptlet 中设置会话属性，但是当我尝试在 java 类中设置会话属性时，它显示诸如会话无法解析"之类的错误.那么如何在java中设置会话呢?

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

对于 Java 类，我假设您的意思是 Servlet 类，因为在任意 Java 类中设置会话属性没有意义.您可以在您的servlet 的 doGet/doPost 方法

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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