How to use servlet fileters?

[Nagaraju Devu]

How to use servlet fileters?

[Petr]

What kind task will you want do? Because in google you can find many tutorial about servlet filter. Do you have specially question?

[only_java]

Sample entry for filter in web.xml

<filter>
<filter-name>FilterExample</filter-name>
<filter-class>FilterExample</filter-class>
</filter>
<filter-mapping>
<filter-name>FilterExample</filter-name>
<url-pattern>/JSP/response.jsp</url-pattern>
</filter-mapping>

Make java file and implement interface "Filter" of servlet API.
Override doFilter() method and write your login there.

You can user filters to check access for certain URLs.
Some URLs can be accessed by some users only.

Hope this will help.

Let me know if you have more question on it :)