Hi All,
You can set redirection for non-www URL to www URL in tomcat using UrlRewriteFilter. Below are the steps to set redirection:
1) Download UrlRewriteFilter (https://tuckey.org/urlrewrite/) to WEB-INF/lib directory of your website.
2) Go to WEB-INF/web.xml and add below code (near the top above any servlet mappings):
<filter>
<filter-name>UrlRewriteFilter</filter-name>
<filter-class>org.tuckey.web.filters.urlrewrite.UrlRewriteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>UrlRewriteFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>
3) Create file urlrewrite.xml in WEB-INF and add below code:
<urlrewrite>
<rule>
<name>Domain Name Check for example.com</name>
<condition name="host" operator="equal">^example.com</condition>
<from>^(.*)$</from>
<to type="redirect">http://www.example.com (http://www.example.com)$1</to>
</rule>
</urlrewrite>
Note: Replace example.com with original domain name.
4) Restart tomcat service on the server.
That's all. Your website should now redirect from non www URL to www URL.