public static databook QueryInfo(String title){
		
		int i = 0;
		double d = 0;
		
		databook bk = new databook();
	    ResultSet restl=null;
	    try{
	    	contct=connector.getConnection();
			Sttt=contct.prepareStatement("select * from bk where title= '"+title+"'");
			restl=Sttt.executeQuery();
			while(restl.next()){
				bk.Sin(restl.getString("isbn"));
				bk.Ste(restl.getString("title"));
				bk.Sad(i);
				bk.Spe(restl.getString("publishdate"));
				bk.Spce(d);
				bk.Spr(restl.getString("publisher"));
			}
		}catch(SQLException e){
			bk=null;
		}if(restl!=null){
			try{
    			restl.close();
    			}catch(SQLException e){}
		}
		connector.Close(contct, Sttt);
		return bk;
	}