The presentation contains description about: Servlets Frameworks MVC architecture Struts2 ORM framework Hibernate framework snapshot of various projects developed by myself.

1. PROJECT ON
STUDENT
INFORMATION
SYSTEM
Submitted by:
Prateek Chauhan

2. A STORY

28. MVC
• Model- Entity solely concerned with getting the
data, providing the data and being the data itself.
(The role of cook)
• View- Renders the model into a form that is actually
displayable. (The role of decorator)
• Controller- Orchestrates the entire
architecture, passes the necessary details to models
and then calls the right view in order to do the
presentation. (The roll of stickman)

29. Why MVC
• Controller is separated from Model. (Concept of
multiple cooks)
• View is separated from Model. (Cook doesn’t worry
about the presentation of food)
• View is separated from Controller. (Stickmen
doesn’t worry about the presentation)

30. MVC Frameworks
• Different MVC frameworks have different
implementations of these concepts.
• They provide prebuilt classes.
• They are extensible.

31. Popular Java MVC frameworks
•
•
•
•
•
•
•
Struts
Struts 2
Springs MVC
Play
JSF
Wicket
Many More

33. Pattern vs. Framework
• Pattern is a set of guidelines
on how to architect the
application
• When we implement a
pattern we need to have
some classes and libraries
• Thus, pattern is the way
you can architect your
application.
• Framework helps us to
follow a particular pattern
when we are building a web
application
• These prebuilt classes and
libraries are provided by the
MVC framework.
• Framework provides
foundation classes and
libraries.

34. Advantages of Frameworks
• Gets us started really quickly- If we are developing a
number of web applications on a similar pattern, then instead
of rewriting the same classes again and again, we have a set
of classes and libraries that make our work easier.
• Leverages industries best practices- If we use MVC
framework, it proves to be really helpful, because the way the
framework has been designed, it consumes a lot of real world
experience.

35. BUSINESS LOGIC
SERVLETS
JSPs

39. STRUTS 2 DISPATCHER: web.xml
• Verifies the request URI and determine which action to
invoke.
• Two types of dispatchers are used
– Filter Dispatcher (org.apache.struts2.dispatcher.FilterDispatcher)

40. STRUTS 2 DISPATCHER: web.xml
– StrutsPrepareAndExecuteFilter (org.apache.struts2.dispatcher.ng.filter
.StrutsPrepareAndExecuteFilter)

41. STRUTS 2 MODEL and VIEW

42. STRUTS 2 MODEL and VIEW
admin

43. STRUTS 2 MODEL and VIEW

44. STRUTS 2 MODEL and VIEW

45. STRUTS 2 CONTROLLERS- struts.xml

46. ABOUT STRUTS 2
• It’s an MVC framework
• Version 2
• Gives us prebuilt classes for MVC that we can
use / extend

47. HIBERNATE: AN APPROACH OF
ORM

48. JDBC
• Standard Java API for database-independent connectivity between
the Java programming language and a wide range of databases.
• JDBC provides a flexible architecture to write a database
independent applications that can run on different platforms and
interact with different DBMS without any modification.
• JDBC includes APIs for each of the task commonly associated with
database usage:
–
–
–
–
Making a connection to a database.
Creating SQL statements.
Executing SQL queries in the database.
Viewing & modifying the resulting records.

49. JDBC
Pros of JDBC
• Clean and simple SQL
processing
• Good performance with
small data
• Very good for small
applications
• Simple syntax so easy to
learn
Cons of JDBC
• Complex if it is used in large
projects
• Large programming
overhead
• No encapsulation
• Hard to implement MVC
concept
• Query is DBMS specific

50. HIBERNATE
• An ORM tool
• Used in the data layer of application, for
persisting application data into database
• Implements JPA
– This means that it follows a set of standards for
implementing persistence, so that in future if we want to
change from Hibernate, we can easily do it without any
performance issues.

51. The Problem

52. The Problem
•
•
•
•
Mapping member variables to columns
Mapping Relationships
Handling data types (esp. Boolean)
Managing changes to object state

53. The Problem
Relational
Object
Mapping!

54. ORM
• Converts data between relational databases and
object oriented programming languages
• Advantages over JDBC
–
–
–
–
–
–
Lets business code access objects rather than DB tables
Hides details of SQL queries from OO logic
Based on JDBC ‘under the hood’
No need to deal with database implementation
Transaction Management and automatic key generation
Fast development of applications

55. JAVA ORM Frameworks
•
•
•
•
•
•
•
Enterprise JavaBeans Entity Beans
Java Data Objects
Castor
TopLink
Springs DAO
Hibernate
Many More

56. Saving without Hibernate
•
•
•
•
•
JDBC Database Configuration
The Model Object
Service method to create the model object
Database Design
DAO method to save the object using SQL
queries

57. The Hibernate Way
• JDBC Database Configuration – Hibernate
Configuration
• The Model object – Annotations
• Service method to create the model object –
Use the Hibernate API
• Database Design – Not Needed !
• DAO method to save the objects using SQL
queries – Not Needed !

58. Supported Databases
•
•
•
•
•
•
•
•
HSQL
DB2
MySQL
PostgreSQL
FrontBase
Oracle
H2
Sybase and many more

59. Supported Technologies
•
•
•
•
Xdoclet Spring
J2EE
Eclipse plug-ins
Maven

60. Hibernate Architecture

61. HIBERNATE CONFIGURATION
• Refers to the hibernate configuration file that is
hibernate.cfg.xml
• This file is read first by the hibernate framework and the data
flow is done accordingly
• Consists of properties and mapping resource
• Mapping resource can consist of a xml file or a POJO class
with annotations
• Consists of properties such as connection url, driver class,
username, password, dialect and hbm2ddl.auto

63. HIBERNATE show_sql

64. Hibernate Mapping Resource

65. Hibernate Table Creation

66. Features of Hibernate
•
•
•
•
Implementation of JPA
ORM tool
Has data caching abilities
Provides an entire different SQL implementation known as
HQL, which is the basis of NoSQL databases
• Can persist the following relations in database, using
annotations as well as xml files.
–
–
–
–
One to One
One to Many
Many to One
Many to many

67. PROJECT MODULE:
CONTACT MANAGER

68. HOME PAGE

69. Deleting a Record

70. Deleting a Record

71. PROJECT SUMMARY
HARDWARE
SPECIFICATION
SOFTWARE
VERSION
MEMORY
10 GB
IDE
MyEclipse 8.0
RAM
128 MB
Server
Apache Tomcat 6.x
PROCESSOR
1.6 GHz
Front End
Struts 2.1.5
OS
WINDOWS 8
Back End
Hibernate 4 +
Oracle 10G XE

72. Trainee At
• ROAD AHEAD TECHNOLOGIES, JAIPUR
• Mentor: Mr. Abhishek Jain

73. THANK YOU