public static ArrayList<ResourcePiece> dbGetRSList(String sql){
ArrayList<ResourcePiece> list=new ArrayList<ResourcePiece>();
try{
Statement statement=conn.createStatement();
ResultSet rs=statement.executeQuery(sql);
ResourcePiece oneRS;
while(rs.next()){
oneRS=new ResourcePiece(rs.getInt("id_rs"), rs.getString("name"), rs.getString("type"), rs.getString("country"),
rs.getString("city"), rs.getDouble("quantity"), rs.getString("unit"), rs.getDate("lu_date"));
list.add(oneRS);
}
statement.close();
}catch(Exception ex){