Advance Java Tutorial | J2EE, Java Servlets, JSP, JDBC | Java Certification Training | Edureka

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01 Introduction To Advanced Java
02 Introduction to J2EE & JDBC
03 JDBC Fundamentals
04 Steps to create Application
05 JDBC Driver Types
06 JDBC Connections
07 JDBC Statements
Topics For Today’s Discussion
JDBC

06 JDBC Connections
07 JDBC Statements
01 Introduction To Servlets
02 Servlet Life Cycle
03 Steps to create Servlet
04 Session Tracking
05 Introduction to Cookies
06 Useful methods of Cookie
07 Creating a cookie
JDBC
Servlets

06 JDBC Connections
07 JDBC Statements
01 Introduction To Servlets
02 Servlet Life Cycle
03 Steps to create Servlet
04 Session Tracking
05 Introduction to Cookies
06 Useful methods of Cookie
07 Creating a cookie
01 IntroductionTo JSP
02 JSP Life Cycle
03 Advantages of JSP vs Servlet
04 JSP Scripting Elements
JDBC Servlets
JSP

Introduction To Advanced Java
Web & Enterprise Application
Client & Server Architecture
Servlets, Web, JSP, JDBC etc.
Next level Java Programming

✓ Used for developing desktop applications, forms
the core/base API.
✓ Helpful for client side standalone applications
Different Editions of Java
Java 2 Standard
Edition
J2SE

✓ Used for client side
✓ Used for applications which run on servers, for
example web sites.
✓ Includes Servlets, Java Server Pages, Java
ServerFaces
J2EE
J2SE
Java 2 Enterprise
Edition

J2ME
J2EE
J2SE
Java Development Kit
✓ JRE is the environment within which the JVM runs
✓ It contains a set of libraries + other files that JVM
uses at runtime
✓ Also called Java RTE
✓ Runs on resource constrained devices (small
scale devices) like cell phones, for example
games.
Java 2 Micro
Edition

Java 2 Enterprise Edition
A platform Independent,
Java Centric environment
for developing, building &
deploying Web-based
applications online.
Simplifies the
complexity of building
n-tier Applications
Standardizes an API between
components and application
server container
J2EE application server and
container provide the
framework services
Why J2EE?

What is JDBC?
It is a standard Java API for database-independent connectivity between the Java
programming language and a wide range of databases.
Connection 01
Create SQL 02
Execute SQL 03
Viewing 04

JDBC Architecture

JDBC SQL Syntax
Drop table
Create table
Insert data
Create database
Drop database
SQL> CREATE DATABASE DATABASE_NAME;

JDBC SQL Syntax
Drop table
Create table
Insert data
Create database
Drop database
SQL> DROP DATABASE DATABASE_NAME;

JDBC SQL Syntax
Drop table
Create table
Insert data
Create database
Drop database
SQL> CREATE TABLE table_name ( column_name
column_data_type, column_name
column_data_type, column_name
column_data_type ... );

JDBC SQL Syntax
Drop table
Create table
Insert data
Create database
Drop database
SQL> DROP TABLE TABLE_NAME;

JDBC SQL Syntax
Drop table
Create table
Insert data
Create database
Drop database
SQL> INSERT INTO table_name VALUES
(column1, column2, ...);

Steps to create a JDBC Application
Import the packages
Register Driver & Open Connection
Execute a Query
Extract data from result set
Clean up the environment

JDBC DRIVER
TYPES
JDBCODBC
BRIDGE
JDBCNATIVEAPI
JDBCNOTPURE
100%JAVAPURE

JDBCODBC
BRIDGE
JDBCNATIVEAPI
JDBCNOTpure
JDBC ODBC DriverJDBCNETpure
100%Pure
Java
Local Computer
JavaApplicationsProprietary Vendor Specific
Protocol
Network Communication
Database Server
DB Vendor
Driver

JDBCODBC
BRIDGE
JDBCNATIVEAPI
JDBCNOTpure
JDBC ODBC DriverJDBCNETpure
100%Pure
Java
Local Computer
JavaApplications
Proprietary Vendor
Specific Protocol
Database Server
JDBC Type 1
JDBC Type 2
JDBC Type 3
Middleware Server

JDBCODBC
BRIDGE
JDBCNATIVEAPI
JDBCNOTpure
JDBC ODBC Driver
JDBCNETpure
100%Pure
Java
Local Computer
JavaApplications
Proprietary Vendor Specific
Protocol
Database Server

JDBC Connections
Create connection object
DB URL Formation
Close connection
Import JDBC Packages
Register JDBC Driver
import java.sql.* ; // for standard JDBC programs
import java.math.* ; // for BigDecimal and BigInteger support

JDBC Connections
DB URL Formation
Close connection
Register JDBC Driver Approach I - Class.forName()
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
}
catch(ClassNotFoundException ex) {
System.out.println("Error: unable to load driver class!");
System.exit(1);
}

JDBC Connections
DB URL Formation
Close connection
Register JDBC Driver Approach II - DriverManager.registerDriver()
try {
Driver myDriver = new
oracle.jdbc.driver.OracleDriver();
DriverManager.registerDriver( myDriver );
} catch(ClassNotFoundException ex) {
System.out.println("Error: unable to load
driver class!");
System.exit(1);
}

JDBC Connections
DB URL Formation
Close connection
RDBMS JDBC Driver Name URL
MYSQL com.mysql.jdbc.Driver
jdbc:mysql://hostname/
databaseName
Sybase com.Sybase.jdbc.SybDriver
jdbc:sybase:Tds:hostname: port
Number/databaseName
DB2
COM.ibm.db2.jdbc.net.DB2Driver
jdbc:db2:hostname:port
Number/databaseName
Oracle oracle.jdbc.driver.OracleDriver
jdbc:oracle:thin:@hostname:port
Number:databaseName
getConnection(String url)
getConnection(String url, Properties prop)
getConnection(String url, String user, String password)

JDBC Connections
DB URL Formation
Close connection
Register JDBC Driver Using a Database URL with a username and password
Using Only a Database URL
Using a Database URL and a Properties Object

JDBC Connections
DB URL Formation
Close connection
To ensure that a connection is closed, you could
provide a 'finally' block in your code
conn.close();

JDBC Statements
Statement
Prepared
Statement
Callable
Statement

What are Servlets?
Request
Response is generated at runtimeResponse is sent to client
Client Server

What are Servlets?
Creates Web Application
Provides Interfaces & Classes
Must be implemented to create Servlet
Robust & Scalable
Deployed to create Web Page
Responds to any incoming requests

Servlet Life Cycle
Handling Request
Loading &
Instantiation
Initialized
End
Start
Stop
init()
service()
destroy()
End of
Request
thread

Steps to create a simple servlet
Create and compile servlet source code
Copy servlet class file & add mappings to web.xml file
Start Apache Tomcat
Start Web Browser & Request the Servlet

Session Tracking in Servlets
Session tracking is a way to maintain state(data) of an user.
1. Request(new)
3. Second new request
2. Response
Client
Server

Cookies
URL
rewriting
Hidden
form field
Http
session

Cookies in Servlet
It is a small piece of information that is persisted between the multiple client requests.
1. Request
2. Request + Cookies
3. Response + Cookies

Useful Methods of Cookie Class
public void setMaxAge(int expiry) Sets the maximum age of the cookies in seconds
public String getName() Returns the name of the cookie. Name cannot be changed after creation
public String getValue() Returns the value of the cookie
public void setName(String name) Changes the name of the cookie
public void setValue(String value) Changes the value of the cookie

Creating & Deleting a Cookie
Deletion
Creation
1.Cookie ck=new Cookie("user",“Edureka");//creating cookie object
2.response.addCookie(ck);//adding cookie in the response
1.Cookie ck=new Cookie("user","");//deleting value of cookie
2.ck.setMaxAge(0);//changing the maximum age to 0 seconds
3.response.addCookie(ck);//adding cookie in the response

Pros & Cons of Cookies
Useful & Easy Technique to maintain the state
Maintained at client side
Wont work if cookie is disabled form browser
Only textual information can be set in cookie object

What is JSP?
It is used to create web application just like Servlet technology. Also called as extension of servlet
Fast Development
Tracking User
Easy to maintain
Portable
Powerful
Flexible

Advantages of JSP over Servlets
JSP
Operation
Servlets
▪ Extension to Servlet ▪ It is not a extension of JSP
▪ No need to recompile and redeploy ▪ Code needs to be recompiled
▪ Less code than servlet ▪ More code comparatively
▪ Easy to maintain ▪ Bit complicated

Life Cycle of JSP
Buffer
(dynamic content)
Servlet Object
JRE
JSP
Servlet (.java File)
Class file
Compiler
JSP Translator

JSP Scripting Elements
<% java source code %>scriptlet
<%= statement %>expression
<%! field or method declaration %>declaration

Advance Java Tutorial | J2EE, Java Servlets, JSP, JDBC | Java Certification Training | Edureka

Advance Java Tutorial | J2EE, Java Servlets, JSP, JDBC | Java Certification Training | Edureka

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