How to learn Servlets and JSP?

This article guides provides you the information for getting started with the Servlet programming and provides you the tutorials for learning Servlets.

How to learn Servlets and JSP?

As we are all aware, a Servlet is a Java programming language class meant for the extension of capabilities of servers. These servers in question host applications accessed through a request-response programming model.  Servlets usually cater to web servers in spite of their ability to answer to any type of requirement. These applications lead to the defining of HTTP-specific Servlet classes with the aid of Java Servlet technology. The Javax.Servlet and the Javax.Servlet.http proffer package interfaces and classes meant for creating Servlets.

Servlets catering to web servers are counterparts of other vibrant Web content technologies like PHP and ASP.NET. You need to use the WebServlet annotation in order to label a Servlet component in a web application. This consists of metadata on the Servlet being declared. The Servlet must specify a minimum of one URL pattern utilizing UrlPatterns or value attributes on the annotations. The other attributes do not require any utilization. The value attribute is used only in case of the only attribute on the annotation being the URL pattern. If that is not the case, use the URL patterns attribute in case other attributes are used, too.

The Web container initialises a Servlet following a Servlet class being loaded and prior to delivering requests from potential customers. The Servlet needs to read persistent configuration data, initialize resources and carry out some one-time actions. In order to make this possible, you need to override the init method of the Servlet interface or specify the initParams attribute of the of the @WebServlet annotation.  If the initialization process is entirely performed a Servlet throws an UnavailableException. An initialization parameter is needed to provide data for a particular Servlet. On the other hand, a context parameter proffers data that is available to all components of a web application.

JSP, abbreviation for Java Server Pages, is a server side technology that is required to prepare web pages dynamically with the utilization of Java as a programming language.  It has been created by Sun Microsystems in the year 1999. It is also an extension to Servlet API. JSP programs are encoded as .jsp files. Dynamic web pages that contain static and dynamic content are prepared with this technology. The static contents have formats based on texts like HTML, XML, etc. The dynamic contents are catered to by the JSP elements.

Servlets are Java programs that support HTML tags. In an enterprise application, it is used to enhance the business layer. Professionals working on Java development usually prepare and maintain them. JSP is an HTML code that support Java statements too. In an enterprise application, it is used to enhance the presentation layer. It can be used to carry out high-end website designing.

JSP is more useful than Servlets. It is a good development on Java technology and its features, like multithreading and exception handling. It has a role in differentiating content generation and content presentation which leads to its being more compliant than other programs. A lot of information can be displayed by web designers with JSP. Web Application Programmers can build the required information with the aid of the JSP. In order to run Java Server Pages, a compatible Web Server with Servlet containers like Apache Tomcat or Jetty, is needed.

In reality, the JSP is a high-end abstraction of the Servlets. At runtime, the JSP is translated into Servlets. Then the Servlet is cached and re-used. This carries on until the original JSP is modified. SO, JSPs have some advantage over Servlets and with all the information you have above you can make a decision whether you want to learn the languages online or attending classes physically.

Here are the tutorials for learning Java Servlets?

• Servlet Tutorials home

• Introduction to Web Server

• Introduction to Servlet

• Servlet vs. other technologies

• Different between Servlet and CGI

• Introduction to Servlet Container

• Servlet APIs

• Servlet Versions

• Overview of different Servlet versions

• Types of Servlets

• Configuring And Running Servlet Program into tomcat 6

• Servlet Life Cycle

• Configuring Eclipse to Tomcat 6

• Some Basic Servlet Examples

  • Writing a servlet class

  • HelloWorld Example

  • Multiple CheckBox Example

  • RadioButton Example

  • Displaying date Into the Servlet

  • Getting Request from Client

  • Extracting HTML form parameters Example

  • Servlet Life Example

  • GetInitParameterNames

  • Counter In init() method

  • Counter in Init and Destroy method

  • Page Visit Count Example

  • GettingRequestHeader

  • Server Snoop

  • Set Language using Locale

  • UpdatingTime Example

  • Reading Text file in Servlet

  • SetStatus in Servlet

  • Getting Client's Address in Servlet

  • RedirectPage Servlet Example

  • Redirect The Page Randomly

  • ColorSelection

  • RollingDice Example

  • Java Servlet Factorial Program Using Recursion Example

  • Java Servlet Radians to Degrees Example

  • Java Servlet Degrees to Radians Example

  • Servlet File Upload

  • Servlet File Download

  • Servlet Project in Maven

  • Getting all the Header Attributes

  • Servlet Get Client Information

  • Servlet Internationalization

• Servlet Context

  • Introduction to Servlet Context

  • ServletContextExample

  • Adding Parameter to Servlet context

  • Getting Parameter from Servlet Context

  • ContextAttribute in Servlet

  • ServletContextListenerExample

  • Retrieving HTTP request headers

  • Servlet RequestDispatcher

• Using Cookie with Servlet

  • Introduction to Cookie

  • Cookies in Servlet

  • Storing data to Cookie

  • Retrieving data from Cookie

  • Deleting Cookie.

• Servlet Session

  • Introduction to Session Management

  • Creating a Session

  • session id in servlet Example

  • Destroying a Session

  • Session Information

  • Checking the Session Existence

  • Setting Session time out

  • Checking Status of Session

  • GetMaxInterval Session

  • Accessing Time

  • Setting and getting attributes into request

  • Setting and getting attributes from Session

  • Login Logout example

  • Forwarding request from one servlet to other

  • Different between RequestDispatcher() and sendRedirect()

  • URL Rewriting in Servlet

• Servlet Filters

  • Introduction to Servlet filters

  • Advantage of Servlet Filters

  • Configuring filter in web.xml

  • Login filter

  • IP filter

• Servlet Listeners

  • Introduction to Servlet Listener

  • Types of Listener

  • Configuring Listener in web.xml

  • Context Listener Example

  • ServletContextAttributeListenerExample

  • Session Listener Example

• Servlet with Database Basic works

  • Database Connectivity in Servlet

  • Create table using servlet

  • Insert data into table java servlet

  • Prepared statement insert in java

  • Get data from database in servlet

  • Add New Column Into Table using servlet

  • Find column name using servlet

  • Find the number of columns using servlet

  • Delete an existing Column from Table using servlet

  • Find Number of Rows using Servlet

  • Delete Row using Servlet

  • Delete all rows using servlet

  • Servlet delete table

• Servlet with Database advance works

  • Servlet Examples with Mysql SELECT

  • Servlet Examples with Mysql JOIN

  • Servlet Examples with Mysql UNION

  • Servlet Examples with Mysql Aggregate Function

  • Servlet Examples with Mysql ALTER

  • Servlet Examples with Mysql DATE Function

  • Servlet Examples with Mysql String Function

  • Servlet Examples with Mysql Math Function

  • Servlet examples with Mysql Comparison functions and operators

  • INSERT INTO SELECT FROM statement Servlet

  • MySQL CREATE INDEX USING JAVA SERVLET

• Ajax with Servlet

  • Basics of Ajax

  • Access Servlet Using Ajax Request

  • Ajax POST Servlet

  • Ajax GET Servlet

  • Parsing XML file

  • Ajax Servlet Form Submit

  • Ajax Login Servlet

  • Ajax Servlet Filter

  • Ajax Jquery Autocomplete Servlet

Check our Java Server Pages programming section for learn JSP.

Today we have provided you the information for learning the Servlet, your search for "How to learn Servlets?" ends here. You can learn Servlets programming on our website with the help of above tutorials.