This Class can be used to conenct to any database mysql oracle access and postgresql and use functions to select update insert or update data from database

//package ur_pack;
/**
*
* auth : Ila Idias
* fb.com/idiasila 
*
*/
 
import java.sql.*;
 
public class OuvrConnection {
 
  private String driver = "com.mysql.jdbc.Driver"; // pour Mysql (Wampserver ..etc)
 
  	/***************************************************************************/
 
 	// private String driver = "sun.jdbc.odbc.JdbcOdbcDriver";       // pour access
	// private String driver = "org.postgresql.Driver";        // pour postgresql
	// private String driver = "oracle.jdbc.driver.OracleDriver";    // pour Oracle 
 
	/***************************************************************************/
 
  private String url = "jdbc:mysql://localhost/gcn";  //Pour MySql  ( gcn is the name of my database )
 
  	/***************************************************************************/
 
    // private String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=myDB.mdb;";     //Pour access
    // private String url = "jdbc:postgresql://localhost/gcn";  									//Pour postgresql 
    // private String url = "jdbc:oracle:thin:@localhost:1521:gcn";  							   //Pour Oracle
 
    /***************************************************************************/
 
  private  String dbUserId = "root";   
  private  String dbPassword = ""; 
 
  //  ******************************************************** For Select Requests ***************************
 
 public ResultSet ReqSelect (String My_Sql)    
   {
   try{
		    Class.forName(driver).newInstance();  // instance my driver to connect 
		    Connection cn=DriverManager.getConnection(url,dbUserId,dbPassword);  // get connect to my database 
 
		   PreparedStatement pr;
		           pr = cn.prepareStatement(My_Sql);
		   ResultSet rs;
		           rs = pr.executeQuery();
  	 	return rs;
 
   }catch(Exception e){
          e.printStackTrace();
          return null;
          }
   }
 
   	 //  ******************************************************** For Update & Insert into & Delete Requests ****
 
   public String ReqUID (String My_Sql){
   try{
	    Class.forName(driver).newInstance();  // instance my driver to connect 
		Connection cn=DriverManager.getConnection(url,dbUserId,dbPassword);  // get connect to my database 
 
	   PreparedStatement pr;
	           pr = cn.prepareStatement(My_Sql);
	   int r;
	           r = pr.executeUpdate(My_Sql);
 
      return +r+ "_Done_";
 
   }catch(Exception e){
          e.printStackTrace();
          return null;
          }
 
   }
 
}