JAVA EE: JDBC - CallableStatement with Input Parameter(Mysql)

Friday 15 May 2015

JDBC - CallableStatement with Input Parameter(Mysql)

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JDBC - CallableStatement with Input Parameter(Mysql)

Create Stored Procedure

DELIMITER $$
 
CREATE PROCEDURE world.getCitiesBasedOnCountryCode (IN CITY_COUNTRY_CODE_INPUT CHAR(35))

BEGIN
  
  SELECT * from city where CountryCode=CITY_COUNTRY_CODE_INPUT;      
 
END$$
 
DELIMITER ;

Call Stored Procedure

CALL `getCitiesBasedOnCountryCode`('IND');

CALL `getCitiesBasedOnCountryCode`('PAK');

JDBCCallableStatementDemo.java

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCCallableStatementDemo
{
    // JDBC driver name and database URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://localhost:3306/world";

    // Database credentials
    static final String USERNAME = "root";
    static final String PASSWORD = "root";

    public static void main(String[] args)
    {
        JDBCCallableStatementDemo jdbcCallableStatementDemo = new JDBCCallableStatementDemo();

        Scanner scanner = new Scanner(System.in);
        while (true)
        {
            System.out.print("Enter City Country Code :");
            String cityCountrycode = scanner.nextLine();

            if (cityCountrycode.equals("exit"))
            {
                break;
            }

            jdbcCallableStatementDemo.getCitiesInfo(cityCountrycode);

        }
        scanner.close();
    }

    private void getCitiesInfo(String cityCountrycode)
    {
        Connection connection = null;
        CallableStatement callableStatement = null;
        try
        {
            /*
             * Register the JDBC driver in DriverManager
             */

            Class.forName(JDBC_DRIVER);

            /*
             * Establish connection to the Database using DriverManager
             */

            connection = DriverManager
                    .getConnection(DB_URL, USERNAME, PASSWORD);

            String plSql = "{call getCitiesBasedOnCountryCode(?)}";

            /*
             * Creates a CallableStatement object for calling database stored
             * procedures. The CallableStatement object provides methods for
             * setting up its IN and OUT parameters, and methods for executing
             * the call to a stored procedure.
             */

            callableStatement = connection.prepareCall(plSql);

            /*
             * Bind IN parameter first, then bind OUT parameters
             */

            callableStatement.setString(1, cityCountrycode);

            /*
             * Use execute method to run the stored procedure.
             */
            ResultSet rs = callableStatement.executeQuery();

            while (rs.next())
            {
                int id = rs.getInt(1);
                String name = rs.getString(2);
                String countryCode = rs.getString(3);
                String district = rs.getString(4);
                int population = rs.getInt(5);

                /*
                 * Display values
                 */
                System.out.print("ID: " + id);
                System.out.print(", Name: " + name);
                System.out.print(", CountryCode: " + countryCode);
                System.out.print(", District: " + district);
                System.out.println(", Population: " + population);
            }

        }
        catch (SQLException se)
        {
            se.printStackTrace();
        }
        catch (ClassNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            /*
             * finally block used to close resources
             */
            try
            {
                if (callableStatement != null)
                {
                    callableStatement.close();
                }
            }
            catch (SQLException sqlException)
            {
                sqlException.printStackTrace();
            }
            try
            {
                if (connection != null)
                {
                    connection.close();
                }
            }
            catch (SQLException sqlException)
            {
                sqlException.printStackTrace();
            }
        }

    }
}

Output

Enter City Country Code :IND
ID: 1024, Name: Mumbai (Bombay), CountryCode: IND, District: Maharashtra, Population: 10500000
ID: 1025, Name: Delhi, CountryCode: IND, District: Delhi, Population: 7206704
ID: 1026, Name: Calcutta [Kolkata], CountryCode: IND, District: West Bengali, Population: 4399819
ID: 1027, Name: Chennai (Madras), CountryCode: IND, District: Tamil Nadu, Population: 3841396
ID: 1028, Name: Hyderabad, CountryCode: IND, District: Andhra Pradesh, Population: 2964638
ID: 1029, Name: Ahmedabad, CountryCode: IND, District: Gujarat, Population: 2876710
ID: 1030, Name: Bangalore, CountryCode: IND, District: Karnataka, Population: 2660088
ID: 1031, Name: Kanpur, CountryCode: IND, District: Uttar Pradesh, Population: 1874409
....
....
Enter City Country Code :PAK
ID: 2822, Name: Karachi, CountryCode: PAK, District: Sindh, Population: 9269265
ID: 2823, Name: Lahore, CountryCode: PAK, District: Punjab, Population: 5063499
ID: 2824, Name: Faisalabad, CountryCode: PAK, District: Punjab, Population: 1977246
ID: 2825, Name: Rawalpindi, CountryCode: PAK, District: Punjab, Population: 1406214
ID: 2826, Name: Multan, CountryCode: PAK, District: Punjab, Population: 1182441
ID: 2827, Name: Hyderabad, CountryCode: PAK, District: Sindh, Population: 1151274
ID: 2828, Name: Gujranwala, CountryCode: PAK, District: Punjab, Population: 1124749
....
....