UNIT 1 PPT- FINAL.pptx Advance Java JDBC

Amity School of Engineering &
Technology
B. Tech (CSE), Semester 6
Subject: Advanced Java Programming
Course Code: IT404
MODULE-1
Amity School of Engineering and Technology

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Unit-1: JDBC Programming
1. Introduction
2. JDBC API
3. The JDBC Connectivity Model
4. JDBC Architecture
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
10. Types of Statement
11. ResultSet Interface
12. ResultSetMetaData Interface
13. Executing SQL updates
14. Transaction Management
15. Batch Processing in JDBC
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JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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Introduction
 Database
• Collection of data
 DBMS
• Database Management System
• Storing and organizing data
 SQL
• Relational database
• Structured Query Language
 JDBC
• Java Database Connectivity
• JDBC driver
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Introduction: JDBC
Example
Oracle
MS Access
My SQL
SQL Server
..
.
5
JDBC is an API used to
communicate Java application to
database in database independent
and platform independent
manner.
JDBC (Java Database Connectivity) is used to
connect java application with database.
It provides classes and interfaces
to connect or communicate Java
application with database.

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Introduction: JDBC
 JDBC (Java Database Connection) is the standard method of
accessing databases from Java application.
 JDBC is a specification from Sun Microsystem that provides a
standard API for java application to communicate with different
database.
 JDBC is a platform independent interface between relational
database and java applications.
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JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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What is an API?
 Application Program Interface
 A set of routines, protocols, and tools for building software
applications.
 JDBC is an API, which is used in java programming for interacting
with database.
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Introduction: JDBC API
 JDBC API allows java programs to
i. Make a connection with database
ii. Creating SQL statements
iii. Execute SQL statement
iv. Viewing & Modifying the resulting records
1. Open a Connection
2. Send a statement
3. Retrieve results
4. Close a connection 1. Create a connection
Session
2. Execute statement
3. Send results
4. Close the session
Java Application
DBMS Engine
Java DB API

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1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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The JDBC Connectivity Model
JAVA
Application
JDBC API
JDBC Driver
Database
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JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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JDBC Architecture
Java Application
JDBC API
JDBC Driver
Manager
JDBC Driver JDBC Driver JDBC Driver
Oracle SQL Server
ODBC Data
Source
A Java program that runs stand
alone in a client or server.
It provides classes & interfaces
to connect or communicate
Java application with database.
This class manages a list of
database drivers.
It ensures that the correct
driver is used to access each
data source.
This interface handles the
communications with the
database
Database is a
collection of
organized
information

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1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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JDBC Driver
 API: Set of interfaces independent of the RDBMS
 Driver: RDBMS-specific implementation of API interfaces
e.g. Oracle, DB2, MySQL, etc.
Just like Java aims for “Write once, Run anywhere",
JDBC strives for “Write once, Run with any database".
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JDBC Driver: Type1 (JDBC-ODBC Driver)
 Depends on support for ODBC
 Not portable
 Translate JDBC calls into ODBC calls and use Windows ODBC built in
drivers
 ODBC must be set up on every client
• for server side servlets ODBC must be set up on web server
 driver sun.jdbc.odbc.JdbcOdbc provided by JavaSoft with JDK
 No support from JDK 1.8 (Java 8)
E.g. MS Access
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JDBC Driver: Type 1 (JDBC-ODBC Driver)
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Application Code
Type 1
JDBC ODBC Bridge
ODBC
Driver
DB Vendor
Driver
Local
DBMS
Local Computer
Java Application
Database Server
Vendor Specific Protocol Network Communication

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JDBC Driver: Type 1 (JDBC-ODBC Driver)
Advantages :
 Allow to communicate with all database supported by ODBC driver
 It is vendor independent driver
Disadvantages:
 Due to large number of translations, execution speed is decreased
 Dependent on the ODBC driver
 ODBC binary code or ODBC client library to be installed in every client
machine
 Uses java native interface to make ODBC call
Because of listed disadvantage, type1 driver is not used in production
environment. It can only be used, when database doesn’t have any other
JDBC driver implementation.
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JDBC Driver: Type 2 (Native Code Driver)
 JDBC API calls are converted into native API calls, which are unique to
the database.
 These drivers are typically provided by the database vendors and
used in the same manner as the JDBC-ODBC Bridge.
 Native code Driver are usually written in C, C++.
 The vendor-specific driver must be installed on each client machine.
 Type 2 Driver is suitable to use with server side applications.
 E.g. Oracle OCI driver, Weblogic OCI driver, Type2 for Sybase
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Application Code
Type 2
Native API
DB Vendor Driver
Local
DBMS
Local Computer
Java Application
Database Server

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Advantages
 As there is no implementation of JDBC-ODBC bridge, it may be
considerably faster than a Type 1 driver.
Disadvantages
 The vendor client library needs to be installed on the client
machine.
 This driver is platform dependent.
 This driver supports all java applications except applets.
 It may increase cost of application, if it needs to run on different
platform (since we may require buying the native libraries for all of
the platform).
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JDBC Driver: Type 3 (Java Protocol)
 Pure Java Driver
 Depends on Middleware server
 Can interface to multiple databases – Not vendor specific.
 Follows a three-tier communication approach.
 The JDBC clients use standard network sockets to communicate with a
middleware application server.
 The socket information is then translated by the middleware application server
into the call format required by the DBMS.
 This kind of driver is extremely flexible, since it requires no code installed on
the client and a single driver can actually provide access to multiple databases.
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Application Code
Type 3
JDBC-Net pure Java
JDBC Type 1 Driver
Local Computer
Java Application
Database Server
JDBC Type 2 Driver
JDBC Type 4 Driver
Middleware Server

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Advantages
 Since the communication between client and the middleware
server is database independent, there is no need for the database
vendor library on the client.
 A single driver can handle any database, provided the middleware
supports it.
 We can switch from one database to other without changing the
client-side driver class, by just changing configurations of
middleware server.
 E.g.: IDS Driver, Weblogic RMI Driver
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Disadvantages
 Compared to Type 2 drivers, Type 3 drivers are slow due to
increased number of network calls.
 Requires database-specific coding to be done in the middle tier.
 The middleware layer added may result in additional latency, but
is typically overcome by using better middleware services.
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JDBC Driver: Type 4 (Database Protocol)
 It is known as the Direct to Database Pure Java Driver
 Need to download a new driver for each database engine
e.g. Oracle, MySQL
 Type 4 driver, a pure Java-based driver communicates directly with
the vendor's database through socket connection.
 This kind of driver is extremely flexible, you don't need to install
special software on the client or server.
 Such drivers are implemented by DBMS vendors.
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Application Code
Type 4
100% Pure Java Local
DBMS
Local Computer
Java Application
Database Server

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Advantages
 Completely implemented in Java to achieve platform independence.
 No native libraries are required to be installed in client machine.
 These drivers don't translate the requests into an intermediary format (such
as ODBC).
 Secure to use since, it uses database server specific protocol.
 The client application connects directly to the database server.
 No translation or middleware layers are used, improving performance.
 The JVM manages all the aspects of the application-to-database
connection.
Disadvantage
 This Driver uses database specific protocol and it is DBMS vendor
dependent.
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JDBC Driver
Thin Driver You can connect to a database without the client installed on your
machine. E.g. Type 4.
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Thick Driver Thick client would need the client installation.
E.g. Type 1 and Type 2.

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Comparison between JDBC Drivers
Type: Type 1 Type 2 Type 3 Type 4
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Name: JDBC-ODBC
Bridge
Native Code
Driver/ JNI
Java Protocol/
Middleware
Database Protocol
Vendor
Specific:
No Yes No Yes
Portable No No Yes Yes
Working JDBC-> ODBC
call
ODBC -> native
call
JDBC call -> native
specific call
JDBC call ->
middleware
specific.
Middleware ->
native call
JDBC call ->DB
specific call
Pure
Java
Driver
No No Yes Yes
Multiple
DB
Yes
[only ODBC
supported DB]
No Yes
[DB Driver should
be in middleware]
No

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Comparison between JDBC Drivers
Type: Type 1 Type 2 Type 3 Type 4
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Name: JDBC-ODBC
Bridge
Native Code
Driver/ JNI
Java Protocol/
Middleware
Database Protocol
Example MS Access Oracle OCI driver IDA Server MySQL
Executio
n Speed
Slowest among
all
Faster Compared
to Type1
Slower Compared
to Type2
Fastest among all
Driver Thick Driver Thick Driver Thin Driver Thin Driver

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Which Driver should be Used?
 If you are accessing one type of database such as MySql, Oracle,
Sybase or IBM etc., the preferred driver type is 4.
 If your Java application is accessing multiple types of databases at
the same time, type 3 is the preferred driver.
 Type 2 drivers are useful in situations, where a type 3 or type 4
driver is not available yet for your database.
 The type 1 driver is not considered a deployment-level driver, and
is typically used for development and testing purposes only.
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JDBC with different RDBMS
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RDBMS JDBC driver name URL format
MySQL com.mysql.jdbc.Driver jdbc:mysql://hostname/ databaseName
ORACLE oracle.jdbc.driver.OracleDriver jdbc:oracle:thin:@hostname:port
Number:databaseName
DB2 com.ibm.db2.jdbc.net.DB2Driver jdbc:db2:hostname:port Number
/databaseName
SQLServer com.microsoft.sqlserver.jdbc.SQLServ
erDriver
jdbc:microsoft:sqlserver:
//hostname:1433;DatabaseName
Sybase com.sybase.jdbc.SybDriver jdbc:sybase:Tds:<host>:<port>
SQLite org.sqlite.JDBC jdbc:sqlite:C:/sqlite/db/databaseName
Derby org.apache.derby.jdbc.ClientDriver "jdbc:derby://localhost:1527/
DB;user=APP;password=APP"

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Questions : JDBC
1 What is JDBC? List out all various types of JDBC Driver. Explain
Thick and Thin driver. Write code snippet for each type of JDBC
connection. Comment on selection of driver. [7 Marks]
Sum’16
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2 What is JDBC? Explain the types of JDBC drivers? Write a code
snippet for each type of JDBC connection. [7 Marks]
Win’16
3 Explain JDBC driver types in detail.[7 Marks] Sum’17
4 List the different types of JDBC drivers. Compare the various
driver types for their advantages and disadvantages.
Sum’18
5 List different types of JDBC drivers and explain any two of them.
[7 Marks]
Win’18
6 List types of diver used in JDBC. Explain Thin driver. [3 Marks] Win’19

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JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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JDBC Components
The JDBC API provides the following interfaces and classes
DriverManager
Connection
Driver
Statement
SQLException
ResultSet
It acts as an interface between user and
drivers. It keeps track of the drivers that
are available and handles establishing a
connection between a database and the
appropriate driver.
Class
Interface
Exception
Package java.sql
This interface handles the
communications with the database
server. Driver interface provides vendor-
specific implementations of the abstract
classes provided by the JDBC API.
This Interface is the session between java
application and database. It contains all
methods for contacting a database.
This class handles any errors that occur in a
database application.
This interface is used to submit the SQL
statements to the database.
These objects hold data retrieved from a
database after you execute an SQL query
using Statement objects. It acts as an
iterator to allow you to move through its
data.
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37
JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
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JDBC Package
java.sql
 Contains core java objects of JDBC API.
 It includes java data objects, that provides basics for connecting to
DBMS and interacting with data stored in DBMS.
 This package performs JDBC core operations such as Creating and
Executing query.
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JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
39

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JDBC Process
Step 1: Loading JDBC Driver
Step 2: Connection to DBMS
Step 3: Creating and executing statement
Step 4: Processing data returned by the DBMS
Step 5: Terminating Connection with DBMS
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Step 1: Loading JDBC Driver
 Create an instance of the driver
 Register driver in the driver manager
 Loading the driver or drivers
for example, you want to use driver for mysql, the following code
will load it:
Class.forName("com.mysql.jdbc.Driver”);
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Class that represent
classes and interfaces in
a running Java
application.
Returns the Class object associated with the
class or interface with the given string name.
Main Pakage
Sub-Pakage
Class.forName() is used
for loading class dynamically
It is used to initiate
Driver at runtime

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 After you've loaded the driver, you can establish a connection
using the DriverManager class (java.sql.DriverManager).
Method: DriverManager
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public static Connection
getConnection(String url) throws
SQLException
Attempts to establish a connection to the given
database URL. The DriverManager attempts to
select an appropriate driver from the set of
registered JDBC drivers.
public static Connection
getConnection(String url,
String user,
String password
)
throws SQLException
Attempts to establish a connection to the given
database URL.
url - a database url of the
form jdbc:subprotocol:subname
user - the database user on whose behalf the
connection is being made
password - the user's password

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Syntax:
Connection conn=
DriverManager.getConnection(URL,USER_NM,PASS)
;
Example:
Connection conn = DriverManager.getConnection
("jdbc:mysql://localhost:3306/amity","root", “ ");
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Interface of java.sql package
Class of java.sql package
Database Name

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Step 3: Creating statement
 Once a connection is obtained, we can interact with the database.
 The JDBC Statement interfaces define the methods and properties
that enable you to send SQL or PL/SQL commands and receive
data from your database.
Statement st=con.createStatement();
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Interface is used for general-
purpose access to your database,
when using static SQL statements at
runtime.
Statement createStatement()
throws SQLException
Creates a Statement object for sending
SQL statements to the database.

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Step 3:Executing Statement
 Once you've created a Statement object, you can then use it to
execute an SQL statement with one of its three execute methods.
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ResultSet executeQuery(String sql)
throws SQLException
Returns a ResultSet object. Use this method
when you expect to get a result set, as you
would with a SELECT statement.
Boolean execute(String sql)
throws SQLException
Returns a boolean value of true if a ResultSet
object can be retrieved; otherwise, it returns
false.
int executeUpdate(String sql)
throws SQLException
Returns the number of rows affected by the
execution of the SQL statement.
for example, an INSERT, UPDATE, or DELETE
statement.

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Step 3: Executing Statement
Syntax:
ResultSet rs=st.executeQuery(“query”);
Example
ResultSet rs = stmt.executeQuery
("SELECT * from thirdcse");
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It holds data retrieved from a
database after you execute an SQL
query using Statement objects. It
acts as an iterator to allow you to
move through its data.
Returns a ResultSet object. Use this
method when you expect to get a
result set, as you would with a
SELECT statement.

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("SELECT * from
babaria");
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Database
Enr_no Name Branch
601 abc ce
602 pqr me
603 rst ec
604 def Ci
ResultSet rs

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("SELECT * FROM thirdcse WHERE
rollno = '"+sid+"'");
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Database
Enr_no Name Branch
601 abc ce
602 pqr me
ResultSet rs

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Step 4:Processing data returned by the DBMS
 Method: Resultset
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boolean next()
Throws SQLException
Moves the cursor forward one row from its
current position.
String getString
(int col_Index)
throws SQLException
Retrieves the value of the designated column in
the current row of this ResultSet object as
a String
int getInt
(int columnIndex) throws
SQLException
Returns the int in the current row in the
specified column index.
String getString
(String col_Label)
throws SQLException
a String in the Java programming language.
int getInt
(String columnLabel)
throws SQLException
the current row

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Processing data returned by the DBMS
 Example
while(rs.next())
{
res="The student name
is"+rs.getString(2)+" mark
is"+rs.getInt(4); }
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Returns the v
specified Column

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Step 5:Terminating Connection with DBMS
 The connection of DBMS is terminated by using close() method.
Example
rs.close();
st.close();
con.close();
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Releases this ResultSet object's
database and JDBC resources
immediately
Releases this Statement object's
immediately
Releases this Connection object's
immediately

52
JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
52

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JDBC Program
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Class.forName("com.mysql.jdbc.Driver");
Connection conn=
DriverManager.getConnection
("jdbc:mysql://localhost:3306/babaria",
“root”, “ ”);
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT
* from
babaria");
while(rs.next())
System.out.print(rs.getString(1));
stmt.close();
conn.close();

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JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
55

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Types of Statement
 The JDBC Statement, PreparedStatement and
CallableStatement interface define the methods and
properties that enable you to send SQL or PL/SQL commands and
receive data from your database.
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Statement
PreparedStatement
CallableStatement
java.sql interface
Used when you want to access the
database stored procedures. The
CallableStatement interface can also
accept runtime input parameters.
Used when you plan to use the SQL
statements multiple times. The
PreparedStatement interface accepts
input parameters at runtime.
Used for general-purpose access to your
database.
Useful for static SQL statements.
Cannot accept parameters.

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Prepared Statement
 The PreparedStatement interface extends the Statement interface.
 It represents a precompiled SQL statement.
 A SQL statement is precompiled and stored in a Prepared
Statement object.
 This object can then be used to efficiently execute this statement
multiple times.
Example
String query="insert into thirdcse values(?,?,?)";
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Table Name
Parameter 2
Parameter 1
Parameter 3

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Methods of PreparedStatement interface
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public void
setInt(int paramIndex, int value)
Sets the integer value to the given parameter
index.
public void
setString(int paramIndex, String value)
Sets the String value to the given parameter
index.
public void
setFloat(int paramIndex, float value)
Sets the float value to the given parameter
index.
public void
setDouble(int paramIndex, double value)
Sets the double value to the given parameter
index.
public int executeUpdate() Executes the query. It is used for create, drop,
insert, update, delete etc.
public ResultSet executeQuery() Executes the select query. It returns an instance
of ResultSet.

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Prepared Statement
 Now to create table in mysql.
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CREATE TABLE
`babaria`.`thirdcse` ( `rollno` VARCHAR
(10) NOT NULL , `name` VARCHAR(20) NOT
NULL , `address` VARCHAR(30) NOT
NULL , `mark` INT(10) NOT
NULL , PRIMARY KEY (`rollno`))
regno name address mobile

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Example of PreparedStatement that inserts the record
1. import java.sql.*;
2. public class PreparedInsert {
3. public static void main(String[] args) {
4. try {
5. Class.forName("com.mysql.jdbc.Driver");
6. Connection conn= DriverManager.getConnection
7. ("jdbc:mysql://localhost:3306/babaria", "root",“
");
8. String query="insert into thirdcse values(?,?,?,?)";
9. PreparedStatement ps=conn.prepareStatement(query);
10. ps.setString(1, “A1003"); //rollno
11. ps.setString(2, “jinu"); //Name
12. ps.setString(3, “Delhi"); //address
13. ps.setString(4, “20"); //mark
14. int i=ps.executeUpdate();
15. System.out.println("no. of rows updated ="+i);
16. ps.close();
17. conn.close();
18. }catch(Exception e){System.out.println(e.toString());} }//PSVM
}//class 60

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Why to use PreparedStatement?
Improves performance:
 The performance of the application will be faster, if you use
PreparedStatement interface because query is compiled only
once.
 This is because creating a PreparedStatement object by explicitly
giving the SQL statement causes the statement to be precompiled
within the database immediately.
 Thus, when the PreparedStatement is later executed, the DBMS
does not have to recompile the SQL statement.
 Late binding and compilation is done by DBMS.
 Provides the programmatic approach to set the values.
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Exam Question
1. Show the use of PreparedStatement object to run
precompiled SQL statement. Also write example of
java snippet for PreparedStaement.[7]
Sum’16
2. Explain the use of PreparedStatement with
appropriate example.[7]
Win’16
3. Explain role of Prepared Statement with example.[7] Sum’17
4. Write a program to insert student records to
database using prepared statement.[7]
Win’17
5. Explain the use of the PreparedStatement object of
the JDBC with an appropriate example.[7]
Win’18
6. Write difference between statement and prepared
statement interface.[3]
Win’19
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63
JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
63

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Method: ResultSet
Categories
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1. Navigational methods Used to move the cursor around.
2. Get methods Used to view the data in the columns of the current row
being pointed by the cursor.
3. Update methods Used to update the data in the columns of the current
row. The updates can then be updated in the underlying
database as well.

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ResultSet: Navigational methods
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boolean first()
throws SQLException
Moves the cursor to the first row.
boolean last()
throws SQLException
Moves the cursor to the last row.
boolean next()
throws SQL Exception
Moves the cursor to the next row. This method
returns false if there are no more rows in the result
set.
boolean previous()
throws SQLException
Moves the cursor to the previous row. This method
returns false if the previous row is off the result set.
boolean absolute(int row) throws
SQLException
Moves the cursor to the specified row.
boolean relative(int row) throws
SQLException
Moves the cursor the given number of rows forward
or backward, from where it is currently pointing.
int getRow()
throws SQLException
Returns the row number that the cursor is pointing to.

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ResultSet: Get methods
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int getInt(String columnName)
throws SQLException
Returns the int in the current row in the column
named columnName.
int getInt(int columnIndex) throws
SQLException
Returns the int in the current row in the specified
column index. The column index starts at 1,
meaning the first column of a row is 1, the second
column of a row is 2, and so on.
String getString(String columnLabel)
throws SQLException
String getString(int columnIndex)
throws SQLException

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ResultSet: Update methods
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void updateString(int col_Index, String s)
throws SQLException
Changes the String in the specified column to
the value of s.
void updateInt(int col_Index, int x)
throws SQLException
Updates the designated column with
an int value.
void updateFloat(int col_Index, float x)
throws SQLException
a float value.
void updateDouble(int col_Index,double x)
throws SQLException
a double value.

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Types of ResultSet
68
Type Description
ResultSet.TYPE_FORWARD_ONLY The cursor can only move forward in the
result set.
Default
Type
ResultSet.TYPE_SCROLL_INSENSITIVE The cursor can scroll forward and
backward, and the result set is not sensitive
to changes made by others to the database
that occur after the result set was created.
ResultSet.TYPE_SCROLL_SENSITIVE The cursor can scroll forward and
backward, and the result set is sensitive to
changes made by others to the database
that occur after the result set was created.

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Concurrency of ResultSet
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Concurrency Description
ResultSet.CONCUR_READ_ONLY Creates a read-only result set.
Default
Type
ResultSet.CONCUR_UPDATABLE Creates an updateable result set.

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ResultSet
try {
Statement stmt = conn.createStatement(
ResultSet.TYPE_FORWARD_ONLY,
ResultSet.CONCUR_READ_ONLY);
}
catch(Exception ex)
{
....
}
70
ResultSet Type
ResultSet Concurrency

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Exam Question
1. What is ResultSet interface. Write various method for
ResultSet interface. Write a code to update record
using this interface.[7]
Win’19
71

72
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
72

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ResultSetMetaData Interface
 The metadata means data about data.
 If you have to get metadata of a table like
i. total number of column
ii. column name
iii. column type etc.
 ResultSetMetaData interface is useful because it provides
methods to get metadata from the ResultSet object.
73

74
Method: ResultSetMetaData
74
int getColumnCount()
throws SQLException
it returns the total number of columns in the
ResultSet object.
String getColumnName(int index)
throws SQLException
it returns the column name of the specified column
index.
String getColumnTypeName(int
index)
throws SQLException
it returns the column type name for the specified
index.

75
ResultSetMetaData
2. public class MetadataDemo {
3. public static void main(String[] args) {
4. try {Class.forName("com.mysql.jdbc.Driver");
5. Connection conn= DriverManager.getConnection
6. ("jdbc:mysql://localhost:3306/babaria", "root",“");
7. Statement stmt = conn.createStatement
(ResultSet.TYPE_FORWARD_ONLY,ResultSet.CONCUR_READ_ONLY);
8. ResultSet rs = stmt.executeQuery("SELECT * from thirdcse");
9. ResultSetMetaData rsmd=rs.getMetaData();
10. System.out.println("Total columns: "+rsmd.getColumnCount());
11. System.out.println("Column Name of 1st column:
"+rsmd.getColumnName(1));
12. System.out.println("Column Type Name of 1st column:“
+rsmd.getColumnTypeName(1));
13. stmt.close();
14. conn.close();
15. }catch(Exception e){System.out.println(e.toString());}
16. }//PSVM
17.}//class
75

76
DatabaseMetadata
 DatabaseMetaData interface provides methods to get meta data
of a database such as
1. database product name,
2. database product version,
3. driver name,
4. name of total number of tables etc.
76

77
DatabaseMetadata
1. Connection con = DriverManager.getConnection
("jdbc:mysql://localhost:3306/temp6","root","root");
2. DatabaseMetaData dbmd=con.getMetaData();
3. System.out.println("getDatabaseProductName:“
+dbmd.getDatabaseProductName());
4. System.out.println("getDatabaseProductVersion():“
+dbmd.getDatabaseProductVersion());
5. System.out.println("getDriverName():"+dbmd.getDriverName());
6. System.out.println("getDriverVersion():“
+dbmd.getDriverVersion());
7. System.out.println("getURL():"+dbmd.getURL());
8. System.out.println("getUserName():"+dbmd.getUserName());
77

78
Exam Question
1. Explain use of DatabaseMetaData with example.[3] Sum’18
Win’18
2. Explain ResultSetMetaData with suitable program.
[3]
Win’18
78

79
JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
79

80
Executing SQL updates
2. class UpdateDemo{
3. public static void main(String args[]){
4. try{ Class.forName("com.mysql.jdbc.Driver");
5. Connection con=DriverManager.getConnection(
6. "jdbc:mysql://localhost:3306/babaria","root","");
7. Statement stmt=con.createStatement();
8. String query="update thirdcse set name=‘sheena' where
rollno=A1002";
9. int i=stmt.executeUpdate(query);
10. System.out.println("total no. of rows updated="+i);
11. stmt.close();
12. con.close();
13. }catch(Exception e){ System.out.println(e);}
14.} }
80

81
JDBC Programming
1. Introduction
2. JDBC API
5. JDBC Driver
6. JDBC Components
7. JDBC Package
8. JDBC Process
9. JDBC Program
81

82
Transaction Management
82
Transaction
Initial State
Commit
Rollback
Transaction Succeed
Transaction Failed

83
Transaction Management
 In JDBC, Connection interface provides methods to manage
transaction.
83
void setAutoCommit(boolean status) It is true by default, means each
transaction is committed bydefault.
void commit() commits the transaction.
void rollback() cancels the transaction.

84
Transaction Management:commit
2. class CommitDemo{
4. try{
8. con.setAutoCommit(false);//bydefault it is true
10. int i=stmt.executeUpdate("insert into thirdcse
values(‘A1006’,‘sri',‘goa‘,’25’ )");
11. System.out.println("no. of rows inserted="+i);
12. con.commit();//commit transaction
13. con.close();
15.}}
84

85
Transaction Management:rollback
2. class RollbackDemo{
4. try{ Class.forName("com.mysql.jdbc.Driver");
7. con.setAutoCommit(false);//bydeafault it is true
9. int i=stmt.executeUpdate("insert into thirdcse values
(‘A1007’,‘varna',‘nagland‘,’55’ )");
10. con.commit(); //Commit Transaction
11. i+=stmt.executeUpdate("insert into thirdcse values
('A1007',‘vinay',‘bhopal',‘50')"
12. System.out.println("no. of rows inserted="+i);
13. con.rollback(); //Rollback Transaction
14. con.close();
16.}}
85

86
Important Questions:
1. What is JDBC?
List out different types of JDBC driver and explain role of each.
Write code snippet for each type of JDBC connection.
Explain Thick and Thin driver.
Comment on selection of driver.
[Sum -16]
[Win -16]
[Sum -18]
[Win -18]
[Win -19]
86
2. Explain Prepared statements with suitable example [Sum -16]
[Win -16]
[Win -17]
[Win -18]
4. What is phantom read in JDBC? Which isolation level prevents it? [Sum -16]
3. Give the use of Statement, PreparedStatement and CallableStatement
object. Write code to insert three records into student table using
PreparedStatement (assume student table with Name, RollNo, and Branch
field).
[Win -14]
5. Discuss CallableStatement with example. [Win -17]
[Win -18]
6. What is ResultSet interface. Write various method for ResultSet interface.
Write a code to update record using this interface.
[Win -19]

87
Important Questions:
7. Explain JDBC Transaction Management in detail. [Win -19]
8. Explain use of DatabaseMetaData with example. [Sum -18]
[Win -18]
9. Explain ResultSetMetaData with suitable program. [Win -18]
10. Write a sample code to store image in Database. [Win -19]
87

• A J2EE application contains four components or
tiers: Presentation, Application, Business, and
Resource adapter components.
• The presentation component is the client side
component that is visible to the client and runs on
the client’s server.
• The Application component is web side layer that
runs on the J2EE server.
• The business component is the business layer
which includes server-side business logic such as
JavaBeans, and it is also run on the J2EE server.
• The resource adaptor component comprises an
enterprise information system.

91
Servlet with JDBC
1. import java.io.*;
3. import javax.servlet.*;
4. import javax.servlet.http.*;
5. public class JDBCServlet extends HttpServlet
6. {
7. public void doGet(HttpServletRequest request,
HttpServletResponse response)
8. throws ServletException,IOException
9. { response.setContentType("text/html");
10. PrintWriter out=response.getWriter();
//Program continued in next slide…
...

92
Servlet with JDBC
11. try{
13. Connection con=DriverManager.getConnection
("jdbc:mysql://localhost:3306/ajava","root","");
14. Statement st=con.createStatement();
15. ResultSet rs=st.executeQuery("select * from cxcy");
16. while(rs.next())
17. { out.println("<p>"+rs.getInt(1));
18. out.println(rs.getString(2));
19. out.println(rs.getString(3)+"</p>");
20. }
21. }catch(Exception e)
22. {out.println("<p>inside exception"+e.toString()+"</p>");}
23. }//doGet()
24. }//Class

UNIT 1 PPT- FINAL.pptx Advance Java JDBC

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