private List<BookModel> select(String[] params){
          final String JDBC_DRIVER="com.mysql.jdbc.Driver";
          final String DB_URL="jdbc:mysql://localhost:3306/sys";
          final String USER = "admin";
          final String PASS = "1234";
          Connection conn=null;
          Statement stmt=null;

          List<BookModel> resultSet = new ArrayList<BookModel>();

          try{
             Class.forName(JDBC_DRIVER);
             conn = DriverManager.getConnection(DB_URL, USER, PASS);
             stmt = conn.createStatement();
             String sql;
             sql = "SELECT * FROM book";
             ResultSet rs = stmt.executeQuery(sql);
             while(rs.next()){
                 BookModel nextBook = new BookModel();
                nextBook.isbn = rs.getString("isbn");
                nextBook.tytul = rs.getString("title");
                nextBook.autor = rs.getString("author");
                nextBook.wydawca = rs.getString("publisher");
                nextBook.data = rs.getString("date");

                resultSet.add(nextBook);
             }
             rs.close();
             stmt.close();
             conn.close();

          }catch(SQLException se){
             se.printStackTrace();
          }catch(Exception e){
             e.printStackTrace();
          }finally{
             try{
                if(stmt!=null)
                   stmt.close();
             }catch(SQLException se2){
             }
             try{
                if(conn!=null)
                conn.close();
             }catch(SQLException se){
                se.printStackTrace();
             }
          }

          return resultSet;
    }