How to handle database connections in a Java web application using JNDI?

One way to manage database connections in a Java web application is by using Java Naming and Directory Interface (JNDI). Here's how you can do it:

1. Define a DataSource in the server's configuration file (such as context.xml) with necessary connection parameters like driver class, URL, username, and password.
2. In your Java code, obtain a connection to the database from the JNDI DataSource by performing a JNDI lookup using InitialContext.
3. Use the obtained connection to execute SQL queries and interact with the database in your Java web application.

By using JNDI for managing database connections, you can centralize the configuration of database connections and reduce the overhead of opening and closing connections manually in your Java code.

It is considered a best practice in J2EE development to use JNDI to handle database connections to improve scalability and maintainability of your Java web application.