gistfile1.txt

    public static String inventoryToBase64(Inventory playerInventory) throws IllegalStateException {
        //get the main content part, this doesn't return the armor
        String content = toBase64(playerInventory);

        return content;
    }

    public static String toBase64(Inventory inventory) throws IllegalStateException {
        try {
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            BukkitObjectOutputStream dataOutput = new BukkitObjectOutputStream(outputStream);

            // Write the size of the inventory
            dataOutput.writeInt(inventory.getSize());

            // Save every element in the list
            for (int i = 0; i < inventory.getSize(); i++) {
                dataOutput.writeObject(inventory.getItem(i));
            }

            // Serialize that array
            dataOutput.close();
            return Base64Coder.encodeLines(outputStream.toByteArray());
        } catch (Exception e) {
            throw new IllegalStateException("Unable to save item stacks.", e);
        }
    }

    public static ItemStack[] itemStackArrayFromBase64(String data) throws IOException {
        try {
            ByteArrayInputStream inputStream = new ByteArrayInputStream(Base64Coder.decodeLines(data));
            BukkitObjectInputStream dataInput = new BukkitObjectInputStream(inputStream);
            ItemStack[] items = new ItemStack[dataInput.readInt()];

            // Read the serialized inventory
            for (int i = 0; i < items.length; i++) {
                items[i] = (ItemStack) dataInput.readObject();
            }

            dataInput.close();
            return items;
        } catch (ClassNotFoundException e) {
            throw new IOException("Unable to decode class type.", e);
        }
    }

    public static Inventory fromBase64(String data) throws IOException {
        try {
            ByteArrayInputStream inputStream = new ByteArrayInputStream(Base64Coder.decodeLines(data));
            BukkitObjectInputStream dataInput = new BukkitObjectInputStream(inputStream);
            Inventory inventory = Bukkit.getServer().createInventory(null, dataInput.readInt());

            // Read the serialized inventory
            for (int i = 0; i < inventory.getSize(); i++) {
                inventory.setItem(i, (ItemStack) dataInput.readObject());
            }

            dataInput.close();
            return inventory;
        } catch (ClassNotFoundException e) {
            throw new IOException("Unable to decode class type.", e);
        }
    }

    public static String itemStackArrayToBase64(ItemStack[] items) throws IllegalStateException {
        try {
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            BukkitObjectOutputStream dataOutput = new BukkitObjectOutputStream(outputStream);

            // Write the size of the inventory
            dataOutput.writeInt(items.length);

            // Save every element in the list
            for (int i = 0; i < items.length; i++) {
                dataOutput.writeObject(items[i]);
            }

            // Serialize that array
            dataOutput.close();
            return Base64Coder.encodeLines(outputStream.toByteArray());
        } catch (Exception e) {
            throw new IllegalStateException("Unable to save item stacks.", e);
        }
    }