How to set a forbidden(HTTP 403 Error) page in Jetty?

Question

Java

I don't want users to be able to view lists of files in the css/* js/* img/* etc directories.
I already have a couple of ideas about this:
1. It's elementary to put index.jsp in each of the above directories;
2. Assign a filter that will redirect to 403.jsp when accessing the directory roots (css/ js/ img/)
But it seems to me that this is somewhat the wrong approach, because custom 404, 500 pages are installed quite easily by adding a few lines to the web .xml:

<font color="black"><font color="#0000ff">&lt;</font><font color="#800000">error-page</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">error-code</font><font color="#0000ff">&gt;</font>404<font color="#0000ff">&lt;/</font><font color="#800000">error-code</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">location</font><font color="#0000ff">&gt;</font>/404.jsp<font color="#0000ff">&lt;/</font><font color="#800000">location</font><font color="#0000ff">&gt;</font><br/>
<font color="#0000ff">&lt;/</font><font color="#800000">error-page</font><font color="#0000ff">&gt;</font><br/>
<font color="#0000ff">&lt;</font><font color="#800000">error-page</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">error-code</font><font color="#0000ff">&gt;</font>500<font color="#0000ff">&lt;/</font><font color="#800000">error-code</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">location</font><font color="#0000ff">&gt;</font>/500.jsp<font color="#0000ff">&lt;/</font><font color="#800000">location</font><font color="#0000ff">&gt;</font><br/>
<font color="#0000ff">&lt;/</font><font color="#800000">error-page</font><font color="#0000ff">&gt;</font></font><br/>
<br/>
<font color="gray">* This source code was highlighted with <a href="http://virtser.net/blog/post/source-code-highlighter.aspx"><font color="gray">Source Code Highlighter</font></a>.</font>

... but I don’t know how to do 403.
ZYZH You can take it even wider: how do you set up a 403 page in servlet containers? I don't think Tomcat, Jetty, etc. they are very different in this sense ...
UPD:
In general, in the end, I did this:

<font color="black"><br/>
<br/>
<font color="#0000ff">&lt;</font><font color="#800000">servlet</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">servlet-name</font><font color="#0000ff">&gt;</font>forbidden<font color="#0000ff">&lt;/</font><font color="#800000">servlet-name</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">jsp-file</font><font color="#0000ff">&gt;</font>/403.jsp<font color="#0000ff">&lt;/</font><font color="#800000">jsp-file</font><font color="#0000ff">&gt;</font><br/>
<font color="#0000ff">&lt;/</font><font color="#800000">servlet</font><font color="#0000ff">&gt;</font><br/>
<br/>
<font color="#0000ff">&lt;</font><font color="#800000">servlet-mapping</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">servlet-name</font><font color="#0000ff">&gt;</font>forbidden<font color="#0000ff">&lt;/</font><font color="#800000">servlet-name</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">url-pattern</font><font color="#0000ff">&gt;</font>/css/<font color="#0000ff">&lt;/</font><font color="#800000">url-pattern</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">url-pattern</font><font color="#0000ff">&gt;</font>/img/<font color="#0000ff">&lt;/</font><font color="#800000">url-pattern</font><font color="#0000ff">&gt;</font><br/>
  <font color="#0000ff">&lt;</font><font color="#800000">url-pattern</font><font color="#0000ff">&gt;</font>/js/<font color="#0000ff">&lt;/</font><font color="#800000">url-pattern</font><font color="#0000ff">&gt;</font><br/>
<font color="#0000ff">&lt;/</font><font color="#800000">se</font><font color="#0000ff">&lt;</font><font color="#800000">rvlet-mapping</font><font color="#0000ff">&gt;</font></font><br/>
<br/>
<font color="gray">* This source code was highlighted with <a href="http://virtser.net/blog/post/source-code-highlighter.aspx"><font color="gray">Source Code Highlighter</font></a>.</font>

UPD2:
and then changed to something like this:
<security-constraint>
<display-name>show forbidden message</display-name>
<web-resource-collection>
<web-resource-name>forbidden</web-resource-name >
<url-pattern>/css/</url-pattern>
</web-resource-collection>
<auth-constraint/>
</security-constraint>

Answer 1

In Tomcat this can be done by adding a new section to WEB-INF/web.xml (example for /css/*):

<security-constraint>
  <web-resource-collection>
    <web-resource-name>HTTP-Protected-Resource-1</web-resource-name>
    <description>Description here</description>
    <url-pattern>/css/*</url-pattern>
    <http-method>GET</http-method>
    <http-method>POST</http-method>
  </web-resource-collection>
  <auth-constraint>
    <role-name>NOSOUPFORYOU</role-name>
  </auth-constraint>
</security-constraint>
<login-config>
  <auth-method>DEFAULT</auth-method>
  <realm-name>NOACCESSFORANYONE</realm-name>
</login-config>
<security-role>
  <role-name>NOSOUPFORYOU</role-name>
</security-role>
* This source code was highlighted with Source Code Highlighter.

Source
For Jetty, too, in theory should come up.