Understanding Servlets in Java

It is a technology used to develop the Dynamic Web application. Servlets are essential components in Java web development, facilitating server-side processing of HTTP requests.

Java classes extending web server functionality, handle HTTP requests and generate dynamic responses. They serve various purposes, including form data processing, database interaction, and dynamic content generation. Their platform independence and scalability make them efficient for handling concurrent requests.

The servlet lifecycle involves initialization, request handling, and destruction phases.

Servlet Methods :-

• init( )
• service( )
• destroy( ) .

Some of the HTTP Methods are :-

• do get( )
• do post( )
• do put( )
• do delete( )
• do trace( )
• do option( )
• do head( )
• do connect( ) .

Deploying servlets requires servlet containers like Apache Tomcat or Jetty. Deployment involves deploying a WAR file containing servlet classes to the servlet container, accessible by URLs with context paths. Handling form data involves processing form submissions and parsing parameters using HttpServletRequest methods.

Interacting with databases from servlets involves JDBC integration, executing SQL queries, and processing results. Best practices and security considerations include input validation, preventing SQL injection, and using HTTPS for secure data transmission.

Servlets are foundational in Java web development, enabling the creation of dynamic and interactive web applications.