JDBC Get Connection
The JDBC Get Connection is the mean of establishing a connection between url and database. Whenever get Connection method is called, The Driver Manager search a suitable driver from loaded at initialization.
Understand with Example
The Tutorial help you to understand a code from JDBC Get Connection. The code describe you connection status between url and database. For this we have a class Jdbc Get Connection. The class include loading a driver by calling class.forName ( ),which accept com.mysql.jdbc.Driver as parameter. The Driver Manager class call a get Connection ( ) method ,which return you a connection object. The con.close ( ) close the connection between url and database. In the first println print false for the connection is closed because con.close is called afterward the first println statement. The second println return true for the connection is closed,As connection object calls close ( ) is called before it
In case there is an exception in the code ,The catch block caught and handle the exception.
JdbcGetConnection.java
import java.sql.*;
public class JdbcGetConnection {
public static void main(String args[]) {
Connection con = null;
Statement st = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/komal", "root", "root");
System.out.println("Connection is closed : " + con.isClosed());
con.close();
System.out.println("Connection is closed : " + con.isClosed());
} catch (Exception e) {
System.out.println(e);
}
}
}
Output
Connection is closed : false Connection is closed : true |