Java Servlet

Servlets are the Java programs that runs on the Java-enabled web server or application server. They are used to handle the request obtained from the web server, process the request, produce the response, then send response back to the web server.

Properties of Servlets :

• Servlets work on the server-side.
• Servlets capable of handling complex request obtained from web server.

Execution of Servlets

• The clients send the request to the web server.
• The web server receives the request.
• The web server passes the request to the corresponding servlet.
• The servlet processes the request and generate the response in the form of output.
• The servlet send the response back to the web server.

• The web server sends the response back to the client and the client browser displays it on the screen.

  

Server-side extensions

• Java Servlet is one of the component APIs of Java Platform Enterprise Edition which sets standards for creating dynamic Web applications in Java.
• Common Gateway Interface(CGI) scripts
• Hypertext Preprocessor (PHP)

Java Servlets are more acceptable since they solve the limitations of CGI such as low performance and low degree scalability.

CGI

• CGI is actually an external application which is responsible for processing client requests and generating dynamic content