INDUSTRIAL TRAINING

IN

ADVANCED JAVA

Submitted By:-

Adeeba Nadeem

1364110002

C.S-4th year

ONLINE MUSIC

INTRODUCTION TO ORGANIZATION

INTRODUCTION

• Project Description• Project Purpose SOFTWARE REQUIREMENTS INTRODUCTION TO JAVA J2EE MVC ARCHITECTURE JAVA SERVER PAGES JAVA BEANS

Contents

Contents

SERVLETS SERVLETS AND JSP HOW SERVLETS WORKS?• Servlet API• Servlet Interface• Servlet Life Cycle• Cookies & Session CREATING A SIMPLE SERVLET JDBC Conclusions References

IntRoDUCtIon to oRGAnIZAtIon

A subsidiary of TATA CONSULTANCY SERVICES LIMITED (TCS Ltd), one of the world’s leading information technology consulting, services and business process outsourcing organizations. CMC execute large and complex turnkey projects and have built, managed and supported our customers IT systems across the value chain infrastructure, applications and business processes.

PRojeCt DesCRIPtIon

The purpose of this project is to:

The E-Music World application is an Online Website for an Organization. It is a virtual showcase for different types of products like FILM, GHAZHAL,POP, DEVOTIONAL , and ROCK, CLASSICAL,FOLK etc.

IntRoDUCtIon

PRojeCt PURPose

• The main aim of this project is to play Online music and very easily with free of cost.

• The project “E-Music” after being tested and was found to overcoming all the problems of the existing system. The system is found to be error free and ready for implementation.

FOLLOWING ARE THE FEATURES OF THIS PROJECT:

•Login, View all Songs Request•Upload/delete Songs•Login, View , play a list of Songs•Track song request history

SOFTWARE REQUIRMENTS

• Operating System: Windows 7 or above

• Front End: HTML & JAVA SCRIPT,J2EE(JSPs, Servlets )

• Web Server: Apache Tomcat 8.0.35/Glassfish

• Back End : Oracle• Tools Used: My eclipse/Eclipse/Net Beans

INTRODUCTION TO JAVA

• Java is a programming language initially developed by Sun Microsystems and released as a principal component of Sun Microsystems Java Platform. Although the language gets much of its syntax from C and C++.

• It has a less complicated object model and lesser low-level services. Java applications are typically compiled to byte code (class file) that can run on any Java Virtual Machine (JVM) regardless of computer architecture. Java is a general purpose, object –oriented language that is specially designed to have a few implementation dependencies as possible.

• Java is currently one of the most standard programming languages in use, and is extensively used from application software to web applications.

J2EE

• Short for Java 2 Platform Enterprise Edition,J2EE is a platform independent, Java centric environment from Sun for developing and deploying web based enterprise applications online. The J2EE platform consist of a services, APIs, and protocols that provide the functionality multitier, Web-based applications

• Some of the key features and services of J2EE-• At the client tier, J2EE supports pure HTML, as well as Java

applets or applications. It relies on Java Server Pages and Servlet code to create HTML or other formatted data for the client.

• Enterprise Java Beans (EJBs) provide another layer where the platform’s logic is stored. An EJB server provides functions such as threading, Concurrency, Security, and memory management. These Services are transparent to the author.

MVC ARCHITECTURE

• Model-View –Controller (MVC) is an architecture tat separates the representation of information from the user’s interface with it. The mode consists of application data and business rules, and the controller mediates input, converting it to commands for the model or view. A view can be any output representation data ,such as chart or a diagram. Multiple views of the same data are possible, such as a pie chart for management and a tabular view for accountants .The central idea behind MVC is code reusability and separation of concerns.

JAVA SERVER PAGES

• Java Server Pages(JSP) is technology that helps software developers create dynamically generated web pages based on HTML, XML, or other document types. Released in 1999 by Sun Microsystems. JSP is similar to PHP, but it uses the Java programming language.

• To deploy and run Java Server Pages, a compatible web server with a servlet container, such as Apache Tomcat or Jetty is required.

• Java Server pages is a technology which permits software developers to create dynamic request like HTML, XML in order to answer to client request in the net. The syntax in Java Server Pages includes a supplementary XML tag which is known as JSP actions.

JAVA BEANS

• Java Beans are reusable software components for Java that can be manipulated visually in a builder tool. Practically ,they are classes written in the Java Programming language conforming to a particular convection. They are used to encapsulate many objects into a single object (the bean) so that they can be passed around as a single bean object instead of as multiple individual objects. A Java Bean is a Java Object that is serializable, has a null constructor, and allows access to properties using getter and setter methods.

SERVLETS

• When we run small Java programs within a browser these are referred to as Applets. . .

• so we run small Java programs within a server these are “ Servlet ”

• A servlet is a program designed to process a client request (which requires interactivity).

– It processes arguments and formats its results as a short lived document.

• HTML servlets are becoming a popular mechanism for creating interactive servers.

SERVLETS AND JSP

• Java Server Pages is an extension to the servlets API.• With conventional servlets you embed the HTML that you

need inside a Java program.• With JSP you embed your Java program within a HTML

document (by using special tags).• Works rather like JavaScript but the JSP script runs on the

server before the page is dispatched to the user’s browser.

HOW SERVLET WORKS?

THE JAVA SERVLET API•The Java Servlet API is a set of Java classes which define a standard interface between a Web client and a Web servlet. Client requests are made to the Web server, which then invokes the servlet to service the request through this interface.•The API is composed of two packages:

•Java x .servlet•Java x. Servlet .http•The Servlet interface class is the central abstraction of the Java Servlet API. This class defines the methods which servlets must implement including a service() method for the handling of requests.

SERVLET INTERFACE

• The Servlet interface class is the central abstraction of the Java Servlet API. This class defines the methods which servlets must implement including a service() method for the handling of requests.

• \The generic Servlet class implements this interface, and defines a generic , protocol- independent servlet.

• To write an HTTP servlet for use on the web , we will use an even more specialized class of GenericServlet called Http Servlet. Http Servlet provides additional methods for the processing of HTTP requests such as GET(do Get Method) and POST (do post method). Although our servlets may implement a service method, in most cases we will implement the HTTP specific request handling methods of doGet and doPost.

SERVLETS LIFE CYCLE

The life cycle of a servlet can be categorized into four parts:

•Loading and Instantiation: The servlet container loads the servlet during startup or when the first request is made. The loading of the servlet depends on the attribute <load on startup> of web.xml file. If the attribute <load on startup> has a positive value then the servlet is load with loading of the container otherwise it load when the first request comes for service. After loading of the servlet, the container creates the instances of the servlet.

• Initialization: After creating the instances, the servlet container calls the init() method and passes the servlet initialization parameters to the init() method. The Init() method is called only once throughout the life cycle of the servlet. The servlet will be available for service if it is loaded successfully otherwise the servlet container unloads the servlet.

• Destroying the Servlet: If the servlet is no longer needed for servicing any request, the servlet container calls the destroy() method. Like the init() method this method is also called only once throughout the life cycle of the servlet. Calling the destroy() method indicates to the servlet container not to sent the any request for service and the servlet releases all the resources associated with it. Java Virtual Machine claims for the memory associated with the resources for garbage collection.

COOKIES & SESSIONS

COOKIE•A Cookie is a small piece of text stored on a user’s computer by their browser. Common uses for cookies are authentication, storing of site preferences, shopping cart items, and server session identification.•Only the cookies stored by the browser that relate to the domain in the requested URL will be sent to the server.•In essence , a cookie is a great way of linking one page to the next for a user’s interaction with the web site or wenb application

SESSION• A Session can be defined as a server-side storage of

information that is desired to persist throughout the user’s interaction with the web site or web application.

CrEatINg a SImplE SErvlEt

• Servlets are written in a similar fashion to applets– Write a new servlet class which extends

javax.servlet.http.HttpServlet (or just implements javax.servlet.Servlet)

– Override certain methods to deal with requests– Get your methods to create an HTML document to return

information to the client’s browser – Load the servlet byte codes onto your web server (for

example apache/jserv)

JDBC

• The Java Database Connectivity (JDBC). API is the industry standard for database –Independent connectivity between the Java Programming language and a wide range of databases – SQL databases and other tabular data sources, such as spreadsheets or flat files. The JDBC API provides a call-level API for SQL – based database access.

• JDBC technology allows you to use the programming language to exploit” Write Once, Runs Anywhere” capabilities for applications that require access to enterprise data. With a JDBC technology enabled driver, you can connect all corporate data even in a heterogeneous environment.

CONClUSIONS

• An E Music library is a project developed in Java to manage your music store. User can login, Register and creates its own music library, add songs, request to upload songs to administrator. The main aim of creating this Online Music Store System Java based web application is to provide user friendly tool for music web sites.

rEFErENCES

• For information about HTML try http://www.w3schools.com• You can download Sun’s servlet development kit from their

web site at the http://java.sun.com/products/servlet• You can download apache’s Tomcat server from

http://jakarta.apache.org• For other information about Servlet development try

http://www.servlets.com

THANK YOU