How do you set URL rewriting in Tomcat?

To set up URL rewriting in Tomcat, you can achieve this by modifying the Tomcat configuration file. The specific steps are as follows:

1. Open the configuration file server.xml for Tomcat, which is typically located in the conf folder under the Tomcat installation directory.
2. Identify the corresponding label in the file, usually located within the sub-tags of the label.
3. Add a tag in the label to set the URL rewriting rule. For example:

<Valve className="org.apache.catalina.valves.rewrite.RewriteValve" />

1. Create a file named rewrite.config in the conf folder to configure URL rewrite rules. Add the necessary URL rewrite rules to this file, such as:

RewriteRule ^/old-url$ /new-url [R=301,L]

The rule above indicates redirecting /old-url to /new-url, and returning a 301 permanent redirect status code.

1. Save the rewrite.config file and restart the Tomcat server for the configuration to take effect.

By following the above steps, you will be able to set up URL rewriting rules in Tomcat. It is important to note that the syntax and configuration methods of the rules in the URL rewriting configuration file may vary depending on the version of Tomcat, so it is recommended to consult the official documentation or related documents for learning and understanding.