A servlet is a Java programming language class that is used to improve the capabilities of servers that host request-response programming model applications. Servlets can react to any form of request, but they are most typically used to extend web server-hosted applications.
Servlets are Java applications that run on a web server or application server that supports Java. They are used to receive a request from a webserver, process it, create a response, and then transmit the response back to the webserver. Servlets have the following properties: Servlets are server-side applications.
Servlets are Java-enabled servers' general extensions. Their most prevalent application is to extend Web servers, making them a very safe, portable, and simple-to-use alternative to CGI. A servlet is a dynamically loaded module that responds to Web server requests. It's totally contained within the Java Virtual Machine.
The Servlet specification's main goal is to create a reliable mechanism for transmitting content to a client using the Client/Server architecture. Servlets are most commonly used on the Web to generate dynamic content and have native HTTP support.
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