Apache Shiro
Apache Shiro is a powerful and easy-to-use Java security framework that provides authentication, authorization, cryptography, and session management. It simplifies application security by offering a clean API to handle common security tasks like user login, role-based access control, and data encryption. It can be integrated with any Java application, including web, desktop, and command-line applications.
Developers should use Apache Shiro when building Java applications that require robust security features without the complexity of Java EE security or Spring Security. It's particularly useful for projects needing lightweight, flexible security solutions, such as web applications with custom authentication flows, REST APIs with token-based security, or legacy systems requiring security upgrades. Its simplicity makes it ideal for small to medium-sized applications where ease of integration is a priority.