What is servlet in Tomcat?

What is servlet in Tomcat?

At heart, Tomcat is a servlet and JSP container. A Java servlet encapsulates code and business logic and defines how requests and responses should be handled in a Java server. JSP is a server-side view rendering technology. As the developer, you write the servlet or JSP page, then let Tomcat handle the routing.

Can you run a servlet in application server?

An application server supports the whole JavaEE – EJB, JMS, CDI, JTA, the servlet API (including JSP, JSTL), etc. It is possible to run most of the JavaEE technologies on a servlet-container, but you have to install a standalone implementation of the particular technology.

Where does Tomcat store servlet files?

All HTML, static files(images, css etc) are kept directly under Web application folder. While all the Servlet classes are kept inside classes folder. The web. xml (deployement descriptor) file is kept under WEB-INF folder.

How servlet is created?

The servlet example can be created by three ways: By implementing Servlet interface, By inheriting GenericServlet class, (or) By inheriting HttpServlet class.

What exactly is a servlet?

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.

How does a servlet work?

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.

What is difference between generic servlet and HTTP servlet?

The main difference between GenericServlet and HttpServlet is that the GenericServlet is protocol independent that can be used with any protocol such as HTTP, SMTP, FTP, CGI etc. while HttpServlet is protocol dependent and is only used with HTTP protocol.

What replaced Servlets?

Below are some alternatives to servlets:

• Common Gateway Interface (CGI) It is the most typical server-side solution.
• Proprietary API. Many proprietary web servers have built-in support for server-side programming.
• Active Server Pages (ASP)
• Serverside JavaScript.

What are the advantages of servlets?

The advantages of Servlet are as follows:

• Better performance: because it creates a thread for each request, not process.
• Portability: because it uses Java language.
• Robust: JVM manages Servlets, so we don’t need to worry about the memory leak, garbage collection, etc.
• Secure: because it uses java language.