INTRODUCTION
Servlet and JSP are two of the most popular Java web technologies for
generating dynamic content in Java web applications, there is a fundamental
difference between them. For example, the servlet is designed for Java
developers, since most coding is done in Java, while the JSP was designed and
developed for the Web GUI developer, for example, faces that write HTML and
JavaScript and that's why you see the encoding in the JSP is based on the tags.
Even if you can use HTML tags as a string within Servlet and Java code as
Scriptlet within JSP, both are considered bad practice and should be avoided at
all costs because they are very difficult to maintain. The different nature of
Servlet and JSP also allows frontend and backend developers to work in
parallel, JSP work is done mainly by frontend developers, while Servlet work is
done by the backend developers.
In the design and structure MVC pattern, the View part is implemented
using JSP while the controller is implemented using servlet. The models are
nothing more than simple old Java objects. This is also one of the main
differences between Servlet and JSP, one is used as a preview and another is
used as a driver. Let's see one more difference to better answer this question.
Difference between Servlet and JSP
Here are some of the easiest differences between Servlet and JSP. Some
of the points are very important to mention, and. How the JSP is translated and
compiled into the servlet and how it affects the response time. Others are more
to show that you have a good knowledge of the technologies you are using.
1) The first and main difference between Servlet and JSP is that a JSP
is a web page scripting language that can generate dynamic content while
Servlets are Java programs that are already compiled and that also create
dynamic web content.
2) The second difference between the Servlet and the JSP is that the JSP
is actually translated and compiled into the Servlet by the web container when
the first request arrives , on the other hand, the Servlet is already a Java
program, whose instance is created and managed by the web container.
3) As the JSP is translated and compiled into the servlet, they run
faster compared to the JSP.
4) The JSP is designed for HTML developers who do not know Java, but are
familiar with tag-based markup language, such as HTML, while the servlet is
designed for Java developers who like Java code.
5) In the MVC design pattern, the JSP (Java Server Pages) acts as a
preview and the servlet acts as a controller.
6) JSP are generally preferred when there is not much data processing
required. But Servlets are better for use when there is more processing and
manipulation involved. Your JSP should be the most donkey possible, that is, it
should not contain any logic, all logic must go to Servlets. The work of the
JSP should only show the data provided by the model to him. If your JSP starts
to contain logic, it will be difficult to maintain it.
7) The advantage of JSP programming over Servlet is that we can build
custom tags that can call Java beans directly. There is no such ease in
servlets. On the other hand, the JSTL is the popular tag library that allows
you to completely remove the Java from the JSP. Using the expression language
and the JSTL core tag library, you can make your JSP free of Java.
8) We can get JSP functionality on the client side by running JavaScript
on the client side. There are no methods for servlets.
This is all about the difference between Servlet and JSP. As a Java web
developer, you should be familiar with Servlet and JSP and have a good
understanding of how and where to use them. The JSP is generally used in the
front-end or in the GUI layer to create views, while the Servlet is used
primarily in the backend as Controller in the MVC standard whose job it is to
capture and redirect the HTTP request for further processing. In summary, a
servlet is HTML in Java, whereas a JSP is Java in HTML.
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