JAVA 查询的数据转成key value 形式

  //加载所有的套餐
        List allCombos =  productComboService.selectProductComboList(new ProductCombo());
        Map commboMap = allCombos.stream().collect(Collectors.toMap(ProductCombo::getId, ProductCombo::getName));

        List list = orderService.selectOrderList(order);
        if(CollectionUtils.isNotEmpty(list)) {
            list.forEach(el -> {
                String comboIds = el.getComboId();
                if(StringUtils.isEmpty(comboIds)) {
                    el.setComboName("-");
                } else {
                    String comboname = Arrays.stream(comboIds.split(","))
                            .map(comboId -> commboMap.get(Long.valueOf(comboId))).collect(Collectors.joining(","));
                    el.setComboName(comboName);
                }
            });
        }