• 循环打印

  list.stream().map(Location::getId).forEach(System.out::println);
  

• 属性转List集合

  List<String> skus = list.stream().map(Goods::getSku).collect(Collectors.toList());
  

Set<String> kSet = keys.stream().map(k -> k).collect(Collectors.toSet());

Map<String,InventoryAdjustment>  adjustments = list.stream()
                 .map(InventoryChange::getAdjustment).collect(Collectors.toList())
                 .stream().collect(Collectors.toMap(InventoryAdjustment::getCreatedAt, adjustment->adjustment,(key1, key2)->key1));

List<Integer> goodsIds = list.stream().map(OrderDetail::getGoodsId).distinct().collect(Collectors.toList());

List<MiddleRedisSkuStock> skuStockList = values.stream().filter(StringUtils::isNotBlank).map(
                    value -> JSON.parseObject(value, MiddleRedisSkuStock.class)
            ).collect(Collectors.toList());

• BigDecimal求和

  BigDecimal	amount = list.stream().map(OrderDetail::getAmount).reduce(BigDecimal.ZERO,BigDecimal::add);
  

• Integert求和

  list.stream().mapToInt(SalesOrderDetail::getGoodsSum).sum();
  

• 获取集合属性最小值

  	BigDecimal minUnitPrice = list.stream().map(GoodsSku::getUnitPrice).min((u1, u2)->u1.compareTo(u2)).get();