//ShopItem
public class ShopItem {

    private final ItemStack item;
    private ItemStack[] price;
    private final int slot;

    public ShopItem(ItemStack item, ItemStack[] price, int slot) {
        this.item = item;
        this.price = price;
        this.slot = slot;
    }

    public ShopItem(NBTTagCompound nbtTagCompound) {
        net.minecraft.server.v1_12_R1.ItemStack originalItem = new net.minecraft.server.v1_12_R1.ItemStack(nbtTagCompound.getCompound("ShopItem"));
        this.item = CraftItemStack.asBukkitCopy(originalItem);

        NBTTagList nbtPrice = nbtTagCompound.getList("ShopPrice", 10);
        this.price = new ItemStack[9];
        for (int i = 0; i < this.price.length; i++) {
            NBTTagCompound part = nbtPrice.get(i);
            if (part.isEmpty()) {
                price[i] = new ItemStack(Material.AIR);
            } else {
                originalItem = new net.minecraft.server.v1_12_R1.ItemStack(part);
                price[i] = CraftItemStack.asBukkitCopy(originalItem);
            }
        }

        this.slot = nbtTagCompound.getInt("ShopSlot");
    }

    public void saveShopItem(NBTTagCompound nbtTagCompound) {
        NBTTagCompound nbtItem = new NBTTagCompound();
        CraftItemStack craft = ShopNBT.getCraftVersion(this.item);
        CraftItemStack.asNMSCopy(craft).save(nbtItem);

        NBTTagList nbtPrice = new NBTTagList();
        for (ItemStack item : this.price) {
            NBTTagCompound part = new NBTTagCompound();
            if (item != null) {
                if (item.getType() != Material.AIR) {
                    craft = ShopNBT.getCraftVersion(item);
                    CraftItemStack.asNMSCopy(craft).save(part);
                }
            }
            nbtPrice.add(part);
        }

        nbtTagCompound.set("ShopItem", nbtItem);
        nbtTagCompound.set("ShopPrice", nbtPrice);
        nbtTagCompound.setInt("ShopSlot", this.slot);
    }

    public ItemStack getItem() {
        return this.item;
    }

    public ItemStack[] getPrice() {
        return this.price;
    }

    public void setPrice(ItemStack[] price) {
        this.price = price;
    }

    public int getSlot() {
        return this.slot;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final ShopItem other = (ShopItem) obj;
        return Objects.equals(this.item, other.item) && Arrays.deepEquals(this.price, other.price);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 11 * hash + Objects.hashCode(this.item);
        hash = 11 * hash + Arrays.deepHashCode(this.price);
        return hash;
    }

}

//Это восстановление ShopItem
    public static Inventory loadShop() {
        File shopFile = new File(folder + File.separator + "shop.dat");
        if (!shopFile.exists()) {
            LOGGER.log(Level.SEVERE, CONSOLE_PREFIX + "Could not load shop from file. File does not exist.");
            return null;
        }
        NBTTagCompound nbtShop = loadNBTTagFromFile(shopFile);
        if (nbtShop == null) {
            return null;
        }

        NBTTagList nbtItems = nbtShop.getList("Shop", 10);
        Inventory shop = new CraftInventoryCustom(null, QDShop.inst().getSettings().getSlots(), "Магазин");
        ShopItem shopItem;
        for (int i = 0; i < shop.getSize(); i++) {
            if (i < nbtItems.size()) {
                shopItem = new ShopItem(nbtItems.get(i));
                QDShop.inst().getShopManager().getShopItems().add(shopItem);
                shop.setItem(shopItem.getSlot(), shopItem.getItem());
            } else {
                break;
            }
        }

        return shop;
    }

//Это методы установки цены для ShopItem. Я включаю режим "установки цены" и клацаю по предмету в магазе, после чего этот метод ставит цену для указанного предмета с нотбара.
    public void setPrice(Player p, ItemStack stack, int slot) {
        ItemStack[] contents = p.getInventory().getContents();
        boolean b = false;
        for (int i = 0; i < 9; i++) {
            if (contents[i] != null) {
                if (contents[i].getType() != Material.AIR) {
                    b = true;
                }
            }
        }

        if (b) {
            ItemStack[] price = new ItemStack[9];
            System.arraycopy(contents, 0, price, 0, 9);
            ShopItem shopItem = getShopItem(stack);
            if (shopItem != null) {
                shopItem.setPrice(price);
                p.sendMessage(CHAT_PREFIX + ChatColor.GREEN + "Обновлён старый ShopItem.");
            } else {
                shopItem = new ShopItem(stack, price, slot);
                shopItems.add(shopItem);
                p.sendMessage(CHAT_PREFIX + ChatColor.GREEN + "Добавлен новый ShopItem.");
            }
        } else {
            p.sendMessage(CHAT_PREFIX + ChatColor.DARK_RED + "Предметов для установки цены нет.");
        }
    }