oracle BaseDao

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class BaseDao {
String url="jdbc:oracle:thin:localhost:1521:orcl";
String driver="oracle.jdbc.driver.OracleDriver";
public Connection getConnection(){
  try {
   Class.forName(driver);
   return DriverManager.getConnection(url,"scott","sb");
  } catch (ClassNotFoundException e) {
   e.printStackTrace();
  } catch (SQLException e) {
   e.printStackTrace();
  }
  return null;
}
public void closeAll(Connection con,PreparedStatement st){
 
  if(st!=null){
   try {
    st.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
  if(con!=null){
   try {
    con.close();
   } catch (SQLException e) {
    e.printStackTrace();
   }
  }
}
}