String propertyKey = "new.key";
List<String> propertyValueList = Arrays.asList( "new.value" );
//
TableRow tableRow = new TableRow();
tableRow.addAll( tableRowList.get( tableRowList.size() - 1 ) );
tableRow.set( 1, propertyKey );
tableRow.set( 2, propertyValueList.get( 0 ) );
xlsFile.getTableRowList().add( tableRow );
//