Advantages and Disadvantages of Servlet.

Hello Friends, In this blog post(Advantages and Disadvantages of Servlet) we are going to explain to you the advantages and disadvantages of the servlet.

Servlet(Advantages and Disadvantages of Servlet) is nothing but the java program which is used for calling the particular method for searching the appropriate information inside the web browser upon the HTTP request and sent the final response to the client.

Inside this blog post(Advantages and Disadvantages of Servlet) we will also discuss few important questions related to the servlet like:

What are the advantages of Servlet?
What are the advantages of JSP over servlet?
What is the advantage of Servlet over CGI?
What are the advantages of JSP?
How does a servlet work?
What are Servlet and the life cycle of a servlet?
Are servlets still used?

Advantages and Disadvantages of Servlet:

Advantages of servlet:

Servlets are multithreaded. That is whenever the servlet container receives a request for the execution of a servlet, the servlet container loads the servlet in its main memory., and assigns a thread of this servlet for processing this client requests.

If more clients send the request for the same servlet, the servlet container does not create new servlet instances. Instead, it creates a new thread of the same servlet instance. And allocates these thread instances to the different client requests. This makes the overall processing faster and reduces the memory demands on the servlet container/Web Server.

Because servlet execute inside a controlled environment(Container) they are usually quite stable and simple to deploy.

As Servlets are specific java programs, they inherit all the good features of the java programming language, such as object orientation, inherit security, network capabilities, integration with other Java enterprise technologies, etc.

Disadvantages of Servlet:

The dynamic construction of HTML documents is still low-level, that is fragments of textual HTML are written to an output stream, eventually forming a complete HTML document.

There are no compile-time guarantees that the result is valid according to some schema or even well-formed. For non-trivial programs, it can be more difficult to avoid this kind of bug.

It is difficult to separate the concerns of the programmers and HTML designers.

The control flow through a session involving different servlets can be difficult to follow for the programmer. The connection between the code that generates an HTML document with a form and the code that subsequently handles the form field data is often not obvious.

Moreover, the way session state is managed through the set Attribute/getSttribute mechanism is vulnerable, Since the session control-flow is not always clear, the programmer must be careful about assuming that certain attributes have or have not been set in an earlier interaction.

Also, we have seen it is necessary to downcast all results from getAttribute. Which is an additional source of errors that are not detected statically.

Quick Q&A:

What are the advantages of Servlet?

There are various advantages of servlet which are given below:

It provides better performance as it is capable to create the thread for each request instead of the process.
Because the use of the Java language is easily portable.
It is robust in nature as JVM manages the servlet completely and thus we do not need to worry about the memory leak, garbage collection and etc.
Java makes the servlet more secure.

What is the advantage of Servlet over CGI?

Servlet provides the better performance and there are much more. Refer the above question for the same.

What are the advantages of JSP over servlet?

A JSP page is easier to maintain as it contains both HTML tags and JSP tags and also provides more functionality than the Servlet.

Are servlets still used?

Servlets and JSP are considered outdated technologies and are not chosen for any new projects now. But they are in use in some older and legacy projects. Now, these technologies are overcome by new updated MVC frameworks like Struts, webwork, spring and etc.

Conclusion:

Within this blog post(Advantages and Disadvantages of Servlet), we have gone through the advantages and disadvantages of the java servlet. Servlets are multithreaded and can handle multiple tasks or requests. But in making the dynamic HTML documents, this servlet is still stood at a low level.

Within this blog post(Advantages and Disadvantages of Servlet), we have also discussed few important questions like What are the advantages of Servlet,
What are the advantages of JSP over servlet, What is the advantage of Servlet over CGI, What are the advantages of JSP, How does a servlet work, What are Servlet and the life cycle of a servlet, Are servlets still used.

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Have a great time!

Anurag

I am a blogger by passion, a software engineer by profession, a singer by consideration and rest of things that I do is for my destination.