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In the context of Java-based web development, a portlet is a component of a web page that acts like an independent application on the page. Portlets are designed to be reusable and can be embedded in different pages within a portal framework. They conform to the Java Portlet Specification (JSR 168, JSR 286 or JSR 362). To develop these components, developers use frameworks such as Apache Pluto for testing or Liferay for production use. The architecture behind portlets allows them to communicate with one another and provide users with personalized views by adjusting layout and content at runtime. This setup makes it easy to manage multiple applications from a single location within enterprise portals.

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