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by Dinesh Thakur Category: introduction to Servlet

The three important resources of servlet API.

1. javax.servlet.Servlet

2. javax.servlet.GenericServlet      (Abstract class)

3. javax.servlet.http.httpServlet    (Abstract class)



 
by Dinesh Thakur Category: introduction to Servlet

HttpServlet is an abstract class given under the servlet-api present. It is present in javax.servlet.http package and has no abstract methods. It extends GenericServlet class.



 
by Dinesh Thakur Category: introduction to Servlet

HTML exhibits high performance by taking less time to load in the browser. However, when we use HTML page for important user details, by default, all the parameters that are passed appended in the URL. This compromises with the security. On the other hand, applet takes more time to load but there is no problem with Java security. This is an advantage of this technique.



 
by Dinesh Thakur Category: introduction to Servlet

A web resource application is a combination of static as well as dynamic web resource programs, images, etc. A static web resource resides in server and is executed in client side web browser, e.g., HTML. A dynamic web resource program resides in server, is executed in context of server and gives response back to the client, e.g., servlet, JSP. In web application, static web resource takes data from client side and takes it to the dynamic web resource as per request. The dynamic web resource processes the data and sends the response back to client in the form of response.



 
by Dinesh Thakur Category: introduction to Servlet

Process based Server Side Technology

• The procedure of transferring control from one process to another process or from one thread to another thread is called as the scheduling based control jumping or context switching.

 
by Dinesh Thakur Category: introduction to Servlet

Accessing data in a database or in any other data sources is a significant operation in web programming. Data access from JSPs and servlets is done through Java Database Connectivity (JDBC).



 
by Dinesh Thakur Category: introduction to Servlet

• The text that allows non-sequential access through hyper link is called as “hyper text”.

• Protocol http defines set of rules that are required to pass hyper text between browser to server and server to browser.

 
by Dinesh Thakur Category: introduction to Servlet

Internet and WWW are often used interchangeably but both are different. Internet is the global network of computer networks whereas Web is one of the services provided over Internet. That is, Web is an application running over Internet. While creating web applications, the main goal is to perform most of the processing on the browser side, there by, reducing processing load on the server side.



 
by Dinesh Thakur Category: introduction to Servlet

Both are send input values to target web resource program like servlet program along with the request. The difference are



 
by Dinesh Thakur Category: introduction to Servlet

Client side programs can be written using different client side technologies. These are given to develop client side web resources such as html (Web), JavaScript (Netscape), VBScript (Microsoft), AJAX (asynchronous JavaScript and xml) programming languages.

 

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About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to contact us.



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