E-MARKETING E-ZONE PPT Using ADVANCED JAVA

LOW ENTRY COST
REDUCES TRANSACTION COSTS
ACCESS TO THE GLOBAL MARKET
 SECURE MARKET SHARE

SERVLET
 Used to create web application.
 Resides at server side and generates dynamic
web page.
 Extends capabilities of the servers and respond
to the incoming request.

ADVANTAGES OF SERVLET
 Overcome the disadvantages of CGI.
 Better Performance.
 Portability.
 Robust.
 Secure.

REQUESTDISPATCHER IN SERVLET
 The RequestDispatcher interface provides the
facility of dispatching the request to another
resource it may be html, servlet or jsp.
 getRequestDispatcher() method of ServletRequest
returns the object of RequestDispatcher.
Example of using getRequestDispatcher method
RequestDispatcher rd=request.getRequestDispatcher("servlet2");
//servlet2 is the url-pattern of the second servlet
rd.forward(request, response);
//method may be include or forward

JAVA SERVER PAGES(JSP)
 Used to create web application just like Servlet
technology.
 A JSP page consists of HTML tags and JSP tags.

ADVANTAGE OF JSP OVER SERVLET
 Extension to Servlet.
 Easy to maintain.
 Fast Development: No need to recompile and
redeploy.
 Less code than Servlet.
 Needs no compilation.

CREATING A SIMPLE JSP PAGE
 index.jsp
<html>
<body>
<% out.print(“Hello AOT”); %>
</body>
</html>
It will print Hello AOT on the browser.

GET AND POST
Features of GET requests are
 It can be bookmarked.
 It have length restrictions.
 It can be cached.
 It remains in the browser history.
Features of POST requests are
 This requests cannot be bookmarked.
 This requests have no restrictions on length of data.
 This requests are never cached.
 This requests do not remains in the browser history.

The doGet() Method :
A GET request results from a normal request for a URL or from an HTML
form that has no METHOD specified and it should be handled by doGet()
method.
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
// Servlet code
}
The doPost() Method :
A POST request results from an HTML form that specifically lists POST as
the METHOD and it should be handled by doPost() method.
public void do(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
// Servlet code
}

JAVA DATABASE CONNECTIVITY
Why use JDBC?
Before JDBC, ODBC API was the database API to connect
and execute query with the database. But, ODBC API uses
ODBC driver which is written in C language (i.e. platform
dependent and unsecured). That is why Java has defined
its own API (JDBC API) that uses JDBC drivers (written in
Java language).

 Java JDBC is a java API to connect and execute query with
the database. JDBC API uses jdbc drivers to connect with
the database.

5 Steps to connect to the database in java
Register the driver class.
Creating conection.
Creating statement.
Executing queries.
Closing connection.

 No checkout queues
 Reduce prices
 You can shop anywhere in the world
 Easy access 24 hours a day
 Wide selection to cater for all consumers

 Unable to examine products personally
 Not everyone is connected to the Internet
 There is the possibility of credit card number theft
 On average only 1/9th of stock is available on the net

108- Sudhanshu Kumar
Sah
117- Swarup Kumar
Ghosh
119- Tarun Prasad

E-MARKETING E-ZONE PPT Using ADVANCED JAVA

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