jspurlservletsjstlstatic-content

JSP doesn't open CSS, Images and JS

I'm trying to put CSS, JS and IMGs on my JSP, but doesn't work, it's strange because I use c:url and JSTL core.

I'm using JSP, JSTL and Servlet, no frameworks.

structure

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<!DOCTYPE html>
<html>    
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>clientes atuantes</title>
        <link rel="stylesheet" href="<c:url value="/bootstrap/css/bootstrap.min.css"/>">
        <link rel="stylesheet" href="<c:url value="/css/layout.css"/>">
        <script type="text/javascript" src="<c:url value="/bootstrap/js/jquery-1.12.0.js" />"></script>
        <script type="text/javascript" src="<c:url value="/bootstrap/js/bootstrap.min.js" />"></script>
    </head>
    <body>

        <main>
            <div class="col-md-12">
                <div class="panel panel-default espacamentoExterno5">

                    <div class="panel-body">
                        <p><img src="<c:url value="/img/ativo.gif"/>" /> ativo</p>
                        <p><img src="<c:url value="/img/congelado.gif"/>" /> congelado</p>
                        <p><img src="<c:url value="/img/cancelado.gif"/>" /> cancelado</p>

                    </div>
                </div>
            </div>
        </main>
    </body>
</html>

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xmlns:web="http://java.sun.com/xml/ns/javaee" 
         xmlns="http://java.sun.com/xml/ns/javaee" 
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
    
  <display-name>PainelProduct</display-name>
  

</web-app>
Solution

  • The url pattern "/" has a special meaning to the web server. It's used for default servlet mapping which is capable of serving the static content. The static content is JS, CSS, images, html resources. Directing these files to your servlet is wrong, because it's not capable to serve the static content.

    Change the servlet mapping to something @WebServlet(urlPatterns="/incidente")

    and use url localhost:8080/PainelProduct/incidente to forward to jsp page.

    Check this question to learn more about servlets and servlet mapping Mapping a specific servlet to be the default servlet in Tomcat.