Solved Encoding Inventory with Base64

Inventory to string and string to Inventory
EDIT: Fixed, here are the two working methods for any to use:

Code:

public String inventoryToString(Inventory inventory) {
    try {
        ByteArrayOutputStream str = new ByteArrayOutputStream();
        BukkitObjectOutputStream data = new BukkitObjectOutputStream(str);
        data.writeInt(inventory.getSize());
        data.writeObject(inventory.getName());
        for (int i = 0; i < inventory.getSize(); i++) {
            data.writeObject(inventory.getItem(i));
        }
        data.close();
        return Base64.getEncoder().encodeToString(str.toByteArray());
    } catch (Exception e) {
        e.printStackTrace();
    }
    return "";
}

public Inventory stringToInventory(String inventoryData) {
    try {
        ByteArrayInputStream stream = new ByteArrayInputStream(Base64.getDecoder().decode(inventoryData));
        BukkitObjectInputStream data = new BukkitObjectInputStream(stream);
        Inventory inventory = Bukkit.createInventory(null, data.readInt(), data.readObject().toString());
        for (int i = 0; i < inventory.getSize(); i++) {
            inventory.setItem(i, (ItemStack) data.readObject());
        }
        data.close();
        return inventory;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}