What is the Servlet and Servlet life cycle?

01/03/202127/02/2024 Anurag Are servlets still used, Can I write my own method in servlet, Can we run servlet without server, Can we write HTML code in servlet, explain servlet life cycle, features of java sevlet, handling servlet life cycle, How are servlets invoked, How can I learn servlet, How do you call a servlet in Java, How do you link HTML and Java, introduction to java servlet and its life cycle, Is Servlet a language, Is Servlet a Web service, Is Servlet interface or class, jsp life cycle, servlet api, servlet architecture, servlet definition, servlet example, servlet life cycle overview, servlet methods, servlet uses, servlet w3schools, the life cycle of a servlet, types of servlet, What are the advantage of Servlet over CGI, What are the advantages of Servlet, What are the functions of Servlet container, What are the problems with servlets, What is a servlet engine, What is a servlet in spring, What is API in Java, What is called servlet container, What is Cookies in Java, What is correct syntax for doGet () method, What is difference between CGI and servlet, What is doPost method in servlet, What is generic servlet, What is HTTP servlet response, What is in Java EE, What is Java Servlet tutorial point, What is JSP and how it works, What is JSP life cycle, What is JSP useBean, What is server and servlet, what is servlet and how does it work, What is Servlet and how it works, What is Servlet and its types, What is Servlet and why it is used, what is servlet container, What is Servlet example, What is Servlet in HTML, What is Servlet in Java with example, What is Servlet life cycle, What is Servlet Mapping, what is servlet mcq, What is servlet request and response, What is session in Java, What is spring life cycle, What is the difference between servlets and applets, What is Web container in Java, What mean by servlet, Which is not a directive, Which method is used to delete a session, Who maintains the life cycle of servlet, Why do we go for URL rewriting

Hello Friends, In this blog post(What is Servlet and Servlet life cycle?) I am going to let you know about the Java servlet and how it is processed. A servlet is nothing but a Java class that is instantiated by the web server when a servlet gets started.

Within this blog post(What is Servlet and Servlet life cycle?) we will also explore a few important questions and answers related to the Java Servlet:

What are the features of the Java servlet?
What is Servlet and why it is used?
What is Servlet’s example?
What is Servlet in HTML?
What is Servlet and how does it work?
What is Servlet’s life cycle?
What are Servlet and its types?

interaction between server and srevlet — **Servlet and Servlet life cycle**

What is Servlet and why it is used?

When this servlet gets started, it means a particular is being called in the form of an HTTP request through the web browser to the webserver.

Code in the servlet method can obtain information about the request and produce information to be included in an HTTP response by calling methods on parameter objects passed to the method.

When the control is shifted from a servlet to the server then the server creates an HTTP response from the information dynamically generated by the servlet.

When an HTTP request message is received by a servlet-capable server, it first determines, based on the URL of the request, that the request should be handled by a servlet.

Understand this with the help of this example, a server might be configured to treat any request to any URL for which the path component begins with servlet as a request that should be handled by a servlet.

The server then determines from the URL, which servlet should handle the request and calls a method on that servlet. Two parameters are passed to the method – an object implementing the HTTP servlet request interface, and an object implementing the HttpServerResponse interface.

Both of these interfaces are defined as part of the Java Servlet API, Which is implemented by the server.

The first object provides a method that can be used by the servlet to access the information contained in the HTTP request message received by the server.

The second object can be used to record the information that the servlet wishes to include in the HTTP response message that the server will send to the client(we4b browser) in reply to the request.

The servlet method executes, typically calling methods on the HttpServletRequest and HttpServletResponse object passed to it. The information stored in the later object by the servlet method typically includes an entire HTML document along with some HTTP header information like the document content type. When the servlet method has finished its processing it returns control to the server.
The server formats the information stored in the HttpServerResponse object by the servlet into an HTTP response message, which it then sends to the client(web browser) that initiated the HTTP request.

The life cycle of a servlet: What is a Servlet’s life cycle?/ What is the Servlet and Servlet life cycle?

servlet follows the life cycle that governs the multithreaded environment that servlet runs in and provides insight into some of the mechanisms available to a developer for sharing server-side resources.

The servlet follows a three-phase life namely, initialization, service, and destruction.

The initialization is the first phase of the server life cycle. It represents the creation and initialization of resources.

The servlet may be required in response to the service request.

The Javax.servlet.servlet interface must be implemented by all servlet.

This interface defines the init() method to match the initialization phase of a servlet life-cycle.

When a container loads a servlet, invokes the init() method before servicing any requests.

The second phase of a servlet life-cycle is the service phase.

It represents all the interactions along with the request until the servlet is destroyed.

The servlet interface matches the service phase to the service() method. The service() method of a servlet is invoked once as per the request.

Then, it is responsible for generating the response to that request.

The third and final phase of the servlet from the container.

Here, the servlet interface defines the destroy() method to correspond to the destruction life-cycle phase.

When a servlet is to be removed, a container calls the destroy() method.

Features of Java servlet: What are the features of the Java servlet?

Servlet provides many advantages in comparison with CGI. First, performance is better.

The servlet runs within the address space of a web server. It is not required to create a separate process to handle each client request.

Second, servlets are platform-independent since they are written in Java.

Third, the Java security manager on the server enforces a set of restrictions to protect the resources on a server machine.

Finally, the full functionality of the java class libraries is available to a servlet.

It can communicate with applets, databases, or other software through sockets and RMI mechanisms.

Quick Q&A:

What is Servlet’s example?

The various examples of servlets are given below:

Jar file	Server
1) servlet-api.jar	Apache Tomcat
2) weblogic.jar	Weblogic
3) javaee.jar	JBoss
4) javaee.jar	Glassfish

Servlet example

What is Servlet in HTML?

Servlet simply is the Java program that is just the extension of the server capability or performance.

The web server displays the HTML documents and sends this response to the user using the HTTP protocol.

What is Servlet and how does it work?

The main work of the servlet is to handle the request coming from the web server and send the response back to the web server.

You can also go through a few more amazing blog post links below related to core Java:

Keywords In Java In Hindi…
OOPS, Concepts In Java In Hindi…
Data Abstraction In Hindi…
Encapsulation In Hindi…
Wrapper Class In Java In Hindi…
Access Specifiers In Java…
JDBC Driver In Java In Hindi…
Types of JDBC Driver In Java…
Session Beans and their types…
EJB Features: Enterprise Java Beans Features…
Symptoms of an overloaded server…
EJB In Java In Hindi…
Java Beans In Hindi…
What is ODBC in Java in Hindi…
What is JDBC In Hindi…
What are JSP and its advantages…
Advantages and Disadvantages of Servlet…
What is Servlet and why it is used…
Static Keyword In Java In Hindi…

Conclusion:

So friends, In this blog post(What is Servlet and Servlet life cycle?) we have learned about the Java servlet, here we have gone through the life cycle of the servlet and we have also explored the features of the java servlets. Servlets are Java programs that are used to call the methods or particular methods to retrieve specific information from the web server.

Inside this blog post, we have also discussed a few important questions like What are the features of the java servlet,
What is Servlet and why is used, What is Servlet’s example, What is Servlet in HTML, What is Servlet and how does it work, What is Servlet’s life cycle, and What are Servlet and its types?

In the case of any queries, you can write to us at a5theorys@gmail.com we will get back to you ASAP.

Hope! you would have enjoyed this post about What is Servlet and the Servlet life cycle.

Please feel free to give your important feedback in the comment section below.

Have a great time!