Java Servlet URL Mapping

javaservlets

i fairly new to java servlet.

Please forgive me if this question seems stupid.

I have add servlet mapping such as servlet class and url pattern using netbeans in web.xml servlet tab but when the application was running it does not direct go into the target url which is http://localhost:8080/HelloDuke2/greeting but
http://localhost:8080/HelloDuke2/

What am i missing in the configuration ?

How to set the start up url to http://localhost:8080/HelloDuke2/greeting ? 

<?xml version="1.0" encoding="UTF-8"?>
<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">
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<servlet>
<servlet-name>GreetingDukeServlet</servlet-name>
<servlet-class>HelloDuke.GreetingDukeServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>ResponseDukeServlet</servlet-name>
<servlet-class>HelloDuke.ResponseDukeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ResponseDukeServlet</servlet-name>
<url-pattern>/ResponseDukeServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>GreetingDukeServlet</servlet-name>
<url-pattern>/GreetingDukeServlet</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>

Please help.

Thanks.

EDIT:

I have tried the solution provided by Alexey Sviridov but it doesn't works where the browser report http status 404 resource is not available.

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>
    <servlet>
        <servlet-name>GreetingDukeServlet</servlet-name>
        <servlet-class>HelloDuke.GreetingDukeServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet>
        <servlet-name>ResponseDukeServlet</servlet-name>
        <servlet-class>HelloDuke.ResponseDukeServlet</servlet-class>
        <init-param>
            <param-name>Message</param-name>
            <param-value>Hello, PeterWkc</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>GreetingDukeServlet</servlet-name>
        <url-pattern>/GreetingDukeServlet</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>ResponseDukeServlet</servlet-name>
        <url-pattern>/ResponseDukeServlet</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.xhtml</welcome-file>
    </welcome-file-list>
</web-app>

index.xhtml

> <?xml version='1.0' encoding='UTF-8'
> ?> <!DOCTYPE html PUBLIC "-//W3C//DTD
> XHTML 1.0 Transitional//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
> <html
> xmlns="http://www.w3.org/1999/xhtml"
>       xmlns:h="http://java.sun.com/jsf/html">
>     <h:head>
>         <title>Hello Duke</title>
>         <meta http-equiv="REFRESH" content="0; url=GreetingDukeServlet/">
>             
>         </meta>
>         
> 
>     </h:head>
>     <h:body>
>         Hello from Facelets
> 
> 
> 
>     </h:body> </html>

Please help.

Thanks.

Best Answer

I see a Facelets page and I see a JSF specific <context-param>, but I don't see the JSF FacesServlet being definied in web.xml, yet you're fiddling with other servlets.

Aren't you mixing the basic concepts/technologies? Admittedly, the JSP tutorial is missing in Java EE 6 tutorial, but to work with plain vanilla servlets, you'd usually use plain HTML or JSP instead of Facelets.

Anyway, to invoke a servlet by URL, you need to ensure that the URL matches the <url-pattern> of the servlet as is been definied in the web.xml. You've definied your GreetingDukeServlet to listen on URLs matching /GreetingDukeServlet. So the URL has to be http://localhost:8080/HelloDuke2/GreetingDukeServlet instead.

If you actually want the URL to be http://localhost:8080/HelloDuke2/greeting instead, then you should change the <url-pattern> to /greeting instead.

See also:

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