How to execute stored procedures in java?

Answer 
      Here is an example on how to execute a stored procedure with JDBC (to use this in a servlet is the same the only thing is that you create the connection and callable statement in the init() of the servlet):

package DBTest;
import java.sql.*;

public class JdbcTest {
private String mysql_url = "jdbc:mysql://localhost:3306/Sample";
private String mysql_driver = "com.mysql.jdbc.Driver";
private Connection connection = null;;
private CallableStatement msProcedure = null;

public JdbcTest() {
try {
Class.forName(mysql_driver).newInstance();
connection = DriverManager.getConnection( mysql_url, "root", "root" );
msProcedure = connection.prepareCall(
"{? = call sp_sav_Bom_Header( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? ) }"
);
msProcedure.registerOutParameter( 1, java.sql.Types.VARCHAR );
msProcedure.setInt( 2, -1 );
msProcedure.setInt( 3, 39 );
msProcedure.setString( 4, "format" );
long ltTest = new java.util.Date().getTime();
System.out.println( "Today: " + ltTest );
msProcedure.setTimestamp( 5, new Timestamp( ltTest ) );
msProcedure.setString( 6, "type" );
msProcedure.setString( 7, "submitter" );
msProcedure.setString( 8, "email" );
msProcedure.setString( 9, "phone" );
msProcedure.setString( 10, "comments" );
msProcedure.setString( 11, "label" );
msProcedure.setInt( 12, 52 );
msProcedure.setBoolean( 13, true );
msProcedure.setBoolean( 14, false );
msProcedure.setInt( 15, 53 );
msProcedure.setString( 16, "runtime" );
msProcedure.setString( 17, "configuration" );
msProcedure.setBoolean( 18, true );
msProcedure.setBoolean( 19, false );
msProcedure.setString( 20, "special instructions" );
msProcedure.setInt( 21, 54 );

ResultSet lrsReturn = null;
System.out.println( "Execute: " + (lrsReturn = msProcedure.executeQuery() ) );
while( lrsReturn.next() ) {
System.out.println( "Got from result set: " + lrsReturn.getInt( 1 ) );
}
System.out.println( "Got from stored procedure: " + msProcedure.getString( 1 ) );
} catch( Throwable e ) {
e.printStackTrace();
} finally {
if (null != connection)
connection.close();
}
}

public static void main(String[] args) {
new JdbcTest();
}
}