Run the Java Servlet file upload example With the Java Servlet coded, the application can be deployed to any Java application server that supports the Servlet 3.1 specification or newer.

Like other Java enterprise tools, Tomcat has migrated from the original Java EE specification to Jakarta EE. Tomcat 9 and earlier were based on Java EE; Tomcat 10 and later are based on Jakarta EE.

Despite the elegance of the Servlet API, real-world servlet classes tend to have pages of code in their doGet() and doPost() methods, often with complex conditional logic. Over time, more code must be ...