url pattern in web.xml

[Raj Kumar Bindal]

I want to specify 2 url patterns for that same servlet, but not able to do so.
<servlet-mapping>
<servlet-name>HtmlFilter</servlet-name>
<url-pattern>/html/*</url-pattern>
<url-pattern>/HtmlFilter</url-pattern>
</servlet-mapping>

But, it is taking request only for /HtmlFilter, but not for /html/*.
Do i need to give two servlet-mapping and two declarations for servlet using <servlet>.
Please tell.

[Duc Vo]

You'll need to declare two servlet-mapping tags i.e.

    <servlet-mapping>
        <servlet-name>HtmlFilter</servlet-name>
        <url-pattern>/HtmlFilter</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>HtmlFilter</servlet-name>
        <url-pattern>/html/*</url-pattern>
    </servlet-mapping>

[Duc Vo]

Also, why is your servlet named "filter" but it is not a Filter?

[vijay dadhwal]

yes, you can provide as many as mapping you want for a servlet
mapping can be done in single mapping block like this

<servlet-mapping>
    <servlet-name>firstServlet</servlet-name>
    <url-pattern>/firstServlet</url-pattern>
    <url-pattern>/fs</url-pattern>
    <url-pattern>/vs</url-pattern>
  </servlet-mapping>

Vijay (SCJP)

[Raj Kumar Bindal]

I specified many url-patterns, but it took only one.When i wrote multiple servlet-mappings ,then it worked. Seems like we can not write multiple url-pattern in same servlet-mapping

[Ben Souther]

Originally posted by vijay dadhwal:
yes, you can provide as many as mapping you want for a servlet
mapping can be done in single mapping block like this

<servlet-mapping>
    <servlet-name>firstServlet</servlet-name>
    <url-pattern>/firstServlet</url-pattern>
    <url-pattern>/fs</url-pattern>
    <url-pattern>/vs</url-pattern>
  </servlet-mapping>

Vijay (SCJP)

This is true, but only in Servlet Spec 2.5 and up.
Look at SRV.S.19 (Changes from Servlet 2.4):

SRV.19.0.3 Multiple Occurrences of Servlet Mappings
Previous versions of the servlet schema allows only a single url-pattern or servlet
name per servlet mapping. For servlets mapped to multiple URLs this results in
needless repetition of whole mapping clauses.
The deployment descriptor servlet-mappingType was updated to:

<xsd:complexType name="servlet-mappingType">
<xsd:sequence>
  <xsd:element name="servlet-name" type="j2ee:servlet-nameType"/>
    <xsd:element name="url-pattern" type="j2ee:url-patternType" minOccurs="1"
maxOccurs="unbounded"/>
    </xsd:sequence>
    <xsd:attribute name="id" type="xsd:ID"/>
</xsd:complexType>

So..
If you're writing for containers that don't support the 2.5 spec, you'll need to create multiple servlet-mapping entries.
[ December 16, 2008: Message edited by: Ben Souther ]

[vijay dadhwal]

Thanks for information

Regards
vijay