java - tomcat 8 jsp javax.servlet.ServletException 异常

Question

这个error 500和cookie的问题我不太明白，希望高人指点。

当我运行我的 requestDispatcher 时，我得到一个我无法弄清楚的内部错误 500。资源是/WEB-INF/jsp/index.jsp 但在错误消息中它说/WEB-INF/jsp/cookie???

错误信息

HTTP Status 500 - javax.servlet.ServletException: javax.servlet.jsp.JspException: java.io.FileNotFoundException: The requested resource (/MyNewRandomBlog1.0/WEB-INF/jsp/{cookie=JSESSIONID=4724BBA140EA29EFF07AD782C755ED13, cache-control=no-cache, connection=Keep-Alive, host=localhost:8080, accept-language=da,en-US;q=0.7,en;q=0.3, accept=image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, /, user-agent=Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.2; Win64; x64; Trident/7.0; ASU2JS), accept-encoding=gzip, deflate, ua-cpu=AMD64}) is not available

我的 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>MyNewRandomBlog1.0</display-name>
  <welcome-file-list>
    <welcome-file>frontpage</welcome-file>
  </welcome-file-list>

  <servlet>
    <servlet-name>intname</servlet-name>
    <servlet-class>dk.danicait.servlets.FrontpageCreation</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>intname</servlet-name>
    <url-pattern>/frontpage</url-pattern>
  </servlet-mapping>
</web-app>

我的文件树

我的程序中也没有使用任何 cookie，所以它在消息中显示的 cookie 是标准 cookie？

我只是为了确保 requestDispatcher 的文件真的存在

String test = sc.getResource("/WEB-INF/jsp/index.jsp").toString();

获取资源 url 效果很好。

编辑。添加了servlet代码

public class FrontpageCreation extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        ServletContext sc = getServletContext();

//      Set request attributes
        request.setAttribute("header", sc.getResource("/includes/nav.jsp").toString());
        request.setAttribute("footer", sc.getResource("/includes/footer.jsp").toString());

//      Request dispatcher
        getServletContext().getRequestDispatcher("/WEB-INF/jsp/index.jsp").forward(request, response);
    }

}

Answer 1

问题是在

request.setAttribute("header", sc.getResource("/includes/nav.jsp").toString());
request.setAttribute("footer", sc.getResource("/includes/footer.jsp").toString());

我在哪里尝试将这些值传递给

<c:import url="${header}"/>
<c:import url="${footer}"/>

在 index.jsp 页面中，我认为导入语句不理解传递值的格式。他们给出了错误 500 消息。