EL表达式未评估 [英] EL expression not evaluated
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问题描述
这是我的测试servlet；
Here is my test 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}
它应该写成test1:/那是怎么了???
it should write test1 :/ what's wrong with that ???
推荐答案
JSP的早期版本默认禁用EL.请参阅: http://docs.oracle.com/cd /E19316-01/819-3669/bnajh/index.html
Earlier versions of JSP disable EL by default. See: 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:
To enable EL evaluation on this page, try putting the following directive at the top of your JSP file:
<%@page isELIgnored="false" %>
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