基本上，我想在JSP页面上的ArrayList中显示产品。我已经在servlet代码中做到了。但是没有输出。

还需要将products.jsp放在/ WEB-INF文件夹中吗？当我这样做时，会收到请求的非资源错误。

我的Servlet代码（InventoryServlet.java）

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    try {
        List<Product> products = new ArrayList<Product>();
        products = Inventory.populateProducts(); // Obtain all products.
        request.setAttribute("products", products); // Store products in request scope.
        request.getRequestDispatcher("/products.jsp").forward(request, response); // Forward to JSP page to display them in a HTML table.
    } catch (Exception ex) {
        throw new ServletException("Retrieving products failed!", ex);
    }

}

我的JSP页面（products.jsp）

<h2>List of Products</h2>

<table>
    <c:forEach items="${products}" var="product">
       <tr>
           <td>${product.Description}</td>
          <td>${product.UnitPrice}</td>
       </tr>
    </c:forEach>
</table>

Web.xml

<web-app version="3.0"
        xmlns="http://java.sun.com/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

 <servlet>
   <servlet-name>Inventory</servlet-name>
   <servlet-class>com.ShoppingCart.InventoryServlet</servlet-class>
 </servlet>
 <servlet-mapping>
    <servlet-name>Inventory</servlet-name>
    <url-pattern>/products</url-pattern>
  </servlet-mapping>
</web-app>