Monday, 24 October 2016

Get connection from DB

Get the connection from the Database

  • To get the connection, we need to call getConnection() method.
  • getConnection() method is presents in java.sql.DriverManager class
public static Connection getConnection(String url,String username, String password) throws SQLException
  • url = jdbc:oracle:thin:@localhost:1521:xe
  • Oracle Data base user name = scott
  • Oracle Data base password = tiger
Connection con = DriverManager("jdbc:oracle:thin:@localhost:1521:xe","system","nireekshan");

From jdbc:oracle:thin:@localhost:1521:xe
    • jdbc is the JDBC API,
    • oracle is name of the database,
    • thin is name of the driver,
    • localhost is name of the server on which oracle is running,
    • 1521 is port number
    • xe is name of the Oracle Service name.

Program         :       Demo to get the connection from database
Program name  :
Output             :         
 Driver is Registered successfully
 got Connection from DB success
import java.sql.*;
class DBConnect2
public static void main(String args[])throws SQLException
//step-1:Register the JDBC driver
Driver d=new oracle.jdbc.driver.OracleDriver();
System.out.println(“Driver is Registered successfully”);

//step-2: get the connection from DB server
System.out.println("got Connection from DB success"+con);


To compile above java program we have to set the class path to ojdbc14.jar, so, keep this jar in corresponding directory then set the class path.
Set class path:
  • C:\Nireekshan\JDBC>set classpath=ojdbc14.jar;.;
Compile      :          javac
Run            :          java DBConnect1
Output        :         
Driver is Registered successfully
got Connection from DB success
Thanks for your time.