EL 表达式未计算

Question

这是我的测试 servlet ；

public class EventListServlet extends javax.servlet.http.HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        process(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        process(request, response);
    }

    private void process(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        request.setAttribute("name", "test1");
        request.getRequestDispatcher("index.jsp").forward(request, response);
    }
}

并测试 jsp ;

<html>
<body>
<h2>Hello World!</h2>
<p>${name}</p>
</body>
</html>

输出为${name}

它应该写 test1:/ 那有什么问题吗？？？

Answer 1

JSP 的早期版本默认禁用 EL。参见：http://docs.oracle.com/cd/E19316-01/819-3669/bnajh/index.html

要在此页面上启用 EL 评估，请尝试将以下指令放在 JSP 文件的顶部：

<%@page isELIgnored="false" %>

EL 表达式未计算

EL expression not evaluated

jsp

servlets

el