Java With JDBC

Create database with JDBC

In this, we gonna a study how to create a Database using the JDBC application.

    • Before executing the following example, make sure you have the following in place −
    • You should have the admin privilege to create a database in the given schema. To execute the following example, you need to replace the username and password with your actual user name and password.
    • Your MySQL or whatever database you are using is up and running.

Required Steps

The following steps are required to create a new Database using the 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 the database server.

    To create a new database, you need not give any database name while preparing the 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 the 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 the above example as follows −

C:\>javac JDBCExample.java
C:\>

When you run JDBCExample, it produces the following result −

C:\>java JDBCExample
Connecting to database...
Creating database...
Database created successfully...
Goodbye!
C:\>

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