jdbc connection in java

This tutorial provides an example on how to create a Database using JDBC application. Before executing following example, make sure you have the following in place: You should have admin privilege to create a database in the given schema. To execute the following example you need to replace username and password with your actual user name and password. Your MySQL or whatever database you are using is up and running. Required Steps: There are following steps required to create a new Database using JDBC application: Import the packages . Requires that you include the packages containing the JDBC classes needed for database programming. Most often, using import java.sql.* will suffice. Register the JDBC driver . Requires that you initialize a driver so you can open a communications channel with the database. Open a connection . Requires using the DriverManager.getConnection() method to create a Connection object, which represents a physical connection with datbase server. To create a new database, you need not to give any database name while preparing database URL as mentioned in the below example. Execute a query . Requires using an object of type Statement for building and submitting an SQL statement to the database. Clean up the environment . Requires explicitly closing all database resources versus relying on the JVM's garbage collection. Sample Code: Copy and past following example in JDBCExample.java, compile and run as follows: //STEP 1. Import required packages import java.sql.*; public class JDBCExample { // JDBC driver name and database URL static final String JDBC_DRIVER = "com.mysql.jdbc.Driver"; static final String DB_URL = "jdbc:mysql://localhost/"; // Database credentials static final String USER = "username"; static final String PASS = "password"; public static void main(String[] args) { Connection conn = null; Statement stmt = null; try{ //STEP 2: Register JDBC driver Class.forName("com.mysql.jdbc.Driver"); //STEP 3: Open a connection System.out.println("Connecting to database..."); conn = DriverManager.getConnection(DB_URL, USER, PASS); //STEP 4: Execute a query System.out.println("Creating database..."); stmt = conn.createStatement(); String sql = "CREATE DATABASE STUDENTS"; stmt.executeUpdate(sql); System.out.println("Database created successfully..."); }catch(SQLException se){ //Handle errors for JDBC se.printStackTrace(); }catch(Exception e){ //Handle errors for Class.forName e.printStackTrace(); }finally{ //finally block used to close resources try{ if(stmt!=null) stmt.close(); }catch(SQLException se2){ }// nothing we can do try{ if(conn!=null) conn.close(); }catch(SQLException se){ se.printStackTrace(); }//end finally try }//end try System.out.println("Goodbye!"); }//end main }//end JDBCExample Now let us compile above example as follows: C:\>javac JDBCExample.java C:\> When you run JDBCExample, it produces following result: C:\>java JDBCExample Connecting to database... Creating database... Database created successfully... Goodbye! C:\>