Environment Setup

For developing along with a JDBC, we must setup a environment of JDBC for example we are operating on windows platform.

Install Java

Install J2SE 5.0 (JDK 5.0) from official website of javaWe should the following environment variables to set as below

• CLASSPATH: Environment variable should have proper paths,

e.g. C:\Program Files\Java\jdk1.5.0_20\jre\lib.

• PATH:Environment variable should have proper JRE bin,

e.g. C:\Program Files\Java\jre1.5.0_20\bin.

• Double click on control panel in that settings select the advanced tab and click on Environment
• Then check the variables to set properly are not.

Install Database

For a course running a database with a table is a query and solve.Install a database which is better for you

• MySQL DB:It is an open source database we can download it from MySQL Official website .And download,install administrationof MYSQL   have installed the driver at C:\Program Files\MySQL\mysql-connector-java-5.1.8.

CLASSPATH: variable to C:\Program Files\MySQL\mysql-connector-java-             5.1.8\mysql-connector-java-5.1.8-bin.jar.

• Oracle establishment is managerial apparatus called Enterprise Manager. JDBC drivers are as a piece of the establishment. Install Database Drivers

The JDK involves a JDBC-ODBC Bridge driver which makes a Open Database Connectivity (ODBC) drivers accessible to programmers using a JDBC API.

Connection with Data Base:

There are 5 steps involved to connect java application with data base using a JDBC

• Driver class should be registered
• Creating a connection
• Creating a statement
• Executing a queries
• Closing a connection

1. Register a driver class

   The forName( ) method is used to register a driver class this technique is utilized to powerfully stack the driver class.

           Syntax of forNAME( ) Method :

          Public void static forName(String className)

          throws ClassNotFoundException

2. Create a Connection object( ):

   The getConnection( )strategy for Driver Manager class is utilized to build up association with the database.

        Syntax of getConnection() method:

public static Connection getConnection(String url)throws SQLException

public static Connection getConnection(String url,String name,String password)

          throws SQLException

       3.Create the Statement object:

The createStatement() technique for Connection interface is utilized to make explanation, the question of proclamation is mindful to execute inquiries with the database.

   Syntax of createStatement() method:

public Statement createStatement()throws SQLException

     4.Execute the query:

The executeQuery() technique for Statement interface is utilized to execute questions to the database. This strategy restores the protest of ResultSet that can be utilized to get every one of the records of a table .

  Syntax of executeQuery() method:

  public ResultSet executeQuery(String sql)throws SQLException

  5.Close the connection object:

 The executeQuery() technique for Statement interface is utilized to execute questions  to  the database. This technique restores the protest of ResultSet that can be utilized to get every one of the records of a table.

 Syntax of close() method:  public void close()throws SQLException

Types of JDBC Driver  JDBC Driver is a software module which enables java application to relate with the database. There are 4 types of JDBC drivers.1.    Bridge driver of JDBC-ODBC2.    Driver Native-API3.    Driver Network Protocol4.    Thin driver

1) JDBC-ODBC bridge driver

The JDBC-ODBC connect driver utilizes ODBC driver to associate with the database. The JDBC-ODBC connects driver changes over JDBC technique calls into the ODBC work calls. This is presently demoralized in light of thin driver.

Advantages:

• Using is easy simple to utilize.

For connection of data base is easily associated.                                            JDBC –ODBC Bridge DriverHindrances

• Execution corrupted in light of the fact that JDBC strategy call is changed over into the ODBC work calls.

• The ODBC driver should be introduced on the customer machine.

 2) Native-API driver The Native API driver utilizes the customer side libraries of the database. The driver changes over JDBC technique calls into local calls of the database API. It is not composed completely in java.Advantages:Execution updated than JDBC-ODBC connect driver.Disadvantages:

• The Native driver should be introduced on the every customer machine.
• The Vendor customer library should be introduced on customer machine.

3) Network Protocol driverThe Network Protocol driver utilizes middle ware (application server) that proselytes JDBC calls straightforwardly or by implication into the merchant particular database convention. It is completely composed in java.Advantages:No customer side library is required in light of use server that can perform many errands like reviewing, stack adjusting, logging and so on.Disadvantages:

• System bolster is required on customer machine.
•  Requires database-particular coding to be done in the center level.
•  Upkeep of Network Protocol driver turns out to be expensive on the grounds that it  requires database-particular coding to be done in the center level.

 4) Thin driverThe thin driver changes over JDBC calls straightforwardly into the merchant particular          database convention. That is the reason it is known as thin driver. It is completely composed in Java dialect.Advantages:

•  Preferable execution over every other driver.
• No product is required at customer side or server side.

 Disadvantages:

• Drivers rely upon the Database.

 Driver Manager:The DriverManager example of true excellence as an interface among client and drivers. It monitors the drivers that are accessible and handles setting up an association between a database and the proper driver. The DriverManager class keeps up a rundown of Driver classes that have enlisted themselves by calling the strategy DriverManager. DriverManager Methods: Connection interface:A Connection is the session between java application and database. The Connection interface is a processing plant of Statement, Prepared Statement, and DatabaseMetaData i.e. protest of Connection can be utilized to get question of Statement and DatabaseMetaData.The Connection interface give numerous strategies to exchange administration like submit() rollback().Methods of Connection Interface: