diff --git a/src/main/java/org/maxgamer/QuickShop/Util/Util.java b/src/main/java/org/maxgamer/QuickShop/Util/Util.java
index 9533fc9..33959df 100644
--- a/src/main/java/org/maxgamer/QuickShop/Util/Util.java
+++ b/src/main/java/org/maxgamer/QuickShop/Util/Util.java
@@ -1,597 +1,673 @@
-package org.maxgamer.QuickShop.Util;
-
-import java.text.DecimalFormat;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
-import org.bukkit.ChatColor;
-import org.bukkit.Location;
-import org.bukkit.Material;
-import org.bukkit.block.Block;
-import org.bukkit.block.BlockFace;
-import org.bukkit.block.BlockState;
-import org.bukkit.configuration.InvalidConfigurationException;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.enchantments.Enchantment;
-import org.bukkit.inventory.Inventory;
-import org.bukkit.inventory.InventoryHolder;
-import org.bukkit.inventory.ItemStack;
-import org.bukkit.inventory.meta.BookMeta;
-import org.bukkit.inventory.meta.EnchantmentStorageMeta;
-import org.bukkit.inventory.meta.SkullMeta;
-import org.bukkit.material.MaterialData;
-import org.bukkit.material.Sign;
-import org.maxgamer.QuickShop.QuickShop;
-
-import pw.yumc.YumCore.global.L10N;
-
-@SuppressWarnings("deprecation")
-public class Util {
-	private static HashSet<Material> blacklist = new HashSet<>();
-	private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat("#.##");
-	private static QuickShop plugin;
-	private static HashSet<Material> shoppables = new HashSet<>();
-	private static HashSet<Material> tools = new HashSet<>();
-	private static HashSet<Material> transparent = new HashSet<>();
-
-	public static void addTransparentBlock(final Material m) {
-		if (!transparent.add(m)) {
-			System.out.println("已添加透明方块: " + m.toString());
-		}
-		if (!m.isBlock()) {
-			System.out.println(m + " 不是一个方块!");
-		}
-	}
-
-	/**
-	 * Returns true if the given block could be used to make a shop out of.
-	 *
-	 * @param b
-	 *            The block to check. Possibly a chest, dispenser, etc.
-	 * @return True if it can be made into a shop, otherwise false.
-	 */
-	public static boolean canBeShop(final Block b) {
-		try {
-			final BlockState bs = b.getState();
-			return bs instanceof InventoryHolder && shoppables.contains(bs.getType());
-		} catch (final Exception e) {
-			return false;
-		}
-	}
-
-	/**
-	 * Counts the number of items in the given inventory where
-	 * Util.matches(inventory item, item) is true.
-	 *
-	 * @param inv
-	 *            The inventory to search
-	 * @param item
-	 *            The ItemStack to search for
-	 * @return The number of items that match in this inventory.
-	 */
-	public static int countItems(final Inventory inv, final ItemStack item) {
-		int items = 0;
-		for (final ItemStack iStack : inv.getStorageContents()) {
-			if (iStack == null) {
-				continue;
-			}
-			if (Util.matches(item, iStack)) {
-				items += iStack.getAmount();
-			}
-		}
-		return items;
-	}
-
-	/**
-	 * Returns the number of items that can be given to the inventory safely.
-	 *
-	 * @param inv
-	 *            The inventory to count
-	 * @param item
-	 *            The item prototype. Material, durabiltiy and enchants must
-	 *            match for 'stackability' to occur.
-	 * @return The number of items that can be given to the inventory safely.
-	 */
-	public static int countSpace(final Inventory inv, final ItemStack item) {
-		int space = 0;
-		for (final ItemStack iStack : inv.getStorageContents()) {
-			if (iStack == null || iStack.getType() == Material.AIR) {
-				space += item.getMaxStackSize();
-			} else if (matches(item, iStack)) {
-				space += item.getMaxStackSize() - iStack.getAmount();
-			}
-		}
-		return space;
-	}
-
-	public static ItemStack deserialize(final String config) throws InvalidConfigurationException {
-		final YamlConfiguration cfg = new YamlConfiguration();
-		cfg.loadFromString(config);
-		return cfg.getItemStack("item");
-	}
-
-	public static String firstUppercase(final String string) {
-		if (string.length() > 1) {
-			return Character.toUpperCase(string.charAt(0)) + string.substring(1).toLowerCase();
-		}
-		return string.toUpperCase();
-	}
-
-	/**
-	 * Formats the given number according to how vault would like it. E.g. $50
-	 * or 5 dollars.
-	 *
-	 * @return The formatted string.
-	 */
-	public static String format(final double n) {
-		try {
-			return DECIMAL_FORMAT.format(n) + plugin.getEcon().currencyNamePlural();
-		} catch (final NumberFormatException e) {
-			return n + "元";
-		}
-	}
-
-	/**
-	 * Fetches the block which the given sign is attached to
-	 *
-	 * @param b
-	 *            The sign which is attached
-	 * @return The block the sign is attached to
-	 */
-	public static Block getAttached(final Block b) {
-		try {
-			final Sign sign = (Sign) b.getState().getData(); // Throws a NPE
-			// sometimes??
-			final BlockFace attached = sign.getAttachedFace();
-			return attached == null ? null : b.getRelative(attached);
-		} catch (final NullPointerException e) {
-			return null; // /Not sure what causes this.
-		}
-	}
-
-	/**
-	 * Fetches an ItemStack's name - For example, converting INK_SAC:11 to
-	 * Dandellion Yellow, or WOOL:14 to Red Wool
-	 *
-	 * @param i
-	 *            The itemstack to fetch the name of
-	 * @return The human readable item name.
-	 */
-	public static String getName(final ItemStack i) {
-		return L10N.getItemName(i);
-	}
-
-	// Let's make very long names shorter for our sign
-	public static String getNameForSign(final ItemStack itemStack) {
-		String name = getName(itemStack);
-		if (name.length() > 16) {
-			name = name.substring(0, 16);
-		}
-		return name;
-	}
-
-	/**
-	 * Returns the chest attached to the given chest. The given block must be a
-	 * chest.
-	 *
-	 * @param b
-	 *            The chest to check.
-	 * @return the block which is also a chest and connected to b.
-	 */
-	public static Block getSecondHalf(final Block b) {
-		if (!b.getType().toString().contains("CHEST")) {
-			return null;
-		}
-		final Block[] blocks = new Block[4];
-		blocks[0] = b.getRelative(1, 0, 0);
-		blocks[1] = b.getRelative(-1, 0, 0);
-		blocks[2] = b.getRelative(0, 0, 1);
-		blocks[3] = b.getRelative(0, 0, -1);
-		for (final Block c : blocks) {
-			if (c.getType() == b.getType()) {
-				return c;
-			}
-		}
-		return null;
-	}
-
-	/**
-	 * Gets the percentage (Without trailing %) damage on a tool.
-	 *
-	 * @param item
-	 *            The ItemStack of tools to check
-	 * @return The percentage 'health' the tool has. (Opposite of total damage)
-	 */
-	public static String getToolPercentage(final ItemStack item) {
-		final double dura = item.getDurability();
-		final double max = item.getType().getMaxDurability();
-		return String.format("%.2f%%(剩余耐久%s/总耐久%s)", (1 - dura / max) * 100.0, max - dura, max);
-	}
-
-	public static void initialize() {
-		tools.clear();
-		blacklist.clear();
-		shoppables.clear();
-		transparent.clear();
-		plugin = QuickShop.instance;
-		for (final String s : plugin.getConfig().getStringList("shop-blocks")) {
-			Material mat = Material.getMaterial(s.toUpperCase());
-			if (mat == null) {
-				try {
-					mat = Material.getMaterial(Integer.parseInt(s));
-				} catch (final NumberFormatException ignored) {
-				}
-			}
-			if (mat == null) {
-				plugin.getLogger().info("Invalid shop-block: " + s);
-			} else {
-				shoppables.add(mat);
-			}
-		}
-		tools.add(Material.BOW);
-		tools.add(Material.SHEARS);
-		tools.add(Material.FISHING_ROD);
-		tools.add(Material.FLINT_AND_STEEL);
-		tools.add(Material.CHAINMAIL_BOOTS);
-		tools.add(Material.CHAINMAIL_CHESTPLATE);
-		tools.add(Material.CHAINMAIL_HELMET);
-		tools.add(Material.CHAINMAIL_LEGGINGS);
-		tools.add(Material.WOOD_AXE);
-		tools.add(Material.WOOD_HOE);
-		tools.add(Material.WOOD_PICKAXE);
-		tools.add(Material.WOOD_SPADE);
-		tools.add(Material.WOOD_SWORD);
-		tools.add(Material.LEATHER_BOOTS);
-		tools.add(Material.LEATHER_CHESTPLATE);
-		tools.add(Material.LEATHER_HELMET);
-		tools.add(Material.LEATHER_LEGGINGS);
-		tools.add(Material.DIAMOND_AXE);
-		tools.add(Material.DIAMOND_HOE);
-		tools.add(Material.DIAMOND_PICKAXE);
-		tools.add(Material.DIAMOND_SPADE);
-		tools.add(Material.DIAMOND_SWORD);
-		tools.add(Material.DIAMOND_BOOTS);
-		tools.add(Material.DIAMOND_CHESTPLATE);
-		tools.add(Material.DIAMOND_HELMET);
-		tools.add(Material.DIAMOND_LEGGINGS);
-		tools.add(Material.STONE_AXE);
-		tools.add(Material.STONE_HOE);
-		tools.add(Material.STONE_PICKAXE);
-		tools.add(Material.STONE_SPADE);
-		tools.add(Material.STONE_SWORD);
-		tools.add(Material.GOLD_AXE);
-		tools.add(Material.GOLD_HOE);
-		tools.add(Material.GOLD_PICKAXE);
-		tools.add(Material.GOLD_SPADE);
-		tools.add(Material.GOLD_SWORD);
-		tools.add(Material.GOLD_BOOTS);
-		tools.add(Material.GOLD_CHESTPLATE);
-		tools.add(Material.GOLD_HELMET);
-		tools.add(Material.GOLD_LEGGINGS);
-		tools.add(Material.IRON_AXE);
-		tools.add(Material.IRON_HOE);
-		tools.add(Material.IRON_PICKAXE);
-		tools.add(Material.IRON_SPADE);
-		tools.add(Material.IRON_SWORD);
-		tools.add(Material.IRON_BOOTS);
-		tools.add(Material.IRON_CHESTPLATE);
-		tools.add(Material.IRON_HELMET);
-		tools.add(Material.IRON_LEGGINGS);
-		final List<String> configBlacklist = plugin.getConfig().getStringList("blacklist");
-		for (final String s : configBlacklist) {
-			Material mat = Material.getMaterial(s.toUpperCase());
-			if (mat == null) {
-				mat = Material.getMaterial(Integer.parseInt(s));
-				if (mat == null) {
-					plugin.getLogger().info(s + " is not a valid material.  Check your spelling or ID");
-					continue;
-				}
-			}
-			blacklist.add(mat);
-		}
-
-		// ToDo: add extras to config file
-		addTransparentBlock(Material.AIR);
-		/* Misc */
-		addTransparentBlock(Material.CAKE_BLOCK);
-		/* Redstone Material */
-		addTransparentBlock(Material.REDSTONE_WIRE);
-		/* Redstone Torches */
-		addTransparentBlock(Material.REDSTONE_TORCH_OFF);
-		addTransparentBlock(Material.REDSTONE_TORCH_ON);
-		/* Diodes (Repeaters) */
-		addTransparentBlock(Material.DIODE_BLOCK_OFF);
-		addTransparentBlock(Material.DIODE_BLOCK_ON);
-		/* Power Sources */
-		addTransparentBlock(Material.DETECTOR_RAIL);
-		addTransparentBlock(Material.LEVER);
-		addTransparentBlock(Material.STONE_BUTTON);
-		addTransparentBlock(Material.WOOD_BUTTON);
-		addTransparentBlock(Material.STONE_PLATE);
-		addTransparentBlock(Material.WOOD_PLATE);
-		/* Nature Material */
-		addTransparentBlock(Material.RED_MUSHROOM);
-		addTransparentBlock(Material.BROWN_MUSHROOM);
-		addTransparentBlock(Material.RED_ROSE);
-		addTransparentBlock(Material.YELLOW_FLOWER);
-		addTransparentBlock(Material.FLOWER_POT);
-		/* Greens */
-		addTransparentBlock(Material.LONG_GRASS);
-		addTransparentBlock(Material.VINE);
-		addTransparentBlock(Material.WATER_LILY);
-		/* Seedy things */
-		addTransparentBlock(Material.MELON_STEM);
-		addTransparentBlock(Material.PUMPKIN_STEM);
-		addTransparentBlock(Material.CROPS);
-		addTransparentBlock(Material.NETHER_WARTS);
-		/* Semi-nature */
-		addTransparentBlock(Material.SNOW);
-		addTransparentBlock(Material.FIRE);
-		addTransparentBlock(Material.WEB);
-		addTransparentBlock(Material.TRIPWIRE);
-		addTransparentBlock(Material.TRIPWIRE_HOOK);
-		/* Stairs */
-		addTransparentBlock(Material.COBBLESTONE_STAIRS);
-		addTransparentBlock(Material.BRICK_STAIRS);
-		addTransparentBlock(Material.SANDSTONE_STAIRS);
-		addTransparentBlock(Material.NETHER_BRICK_STAIRS);
-		addTransparentBlock(Material.SMOOTH_STAIRS);
-		/* Wood Stairs */
-		addTransparentBlock(Material.BIRCH_WOOD_STAIRS);
-		addTransparentBlock(Material.WOOD_STAIRS);
-		addTransparentBlock(Material.JUNGLE_WOOD_STAIRS);
-		addTransparentBlock(Material.SPRUCE_WOOD_STAIRS);
-		/* Lava & Water */
-		addTransparentBlock(Material.LAVA);
-		addTransparentBlock(Material.STATIONARY_LAVA);
-		addTransparentBlock(Material.WATER);
-		addTransparentBlock(Material.STATIONARY_WATER);
-		/* Saplings and bushes */
-		addTransparentBlock(Material.SAPLING);
-		addTransparentBlock(Material.DEAD_BUSH);
-		/* Construction Material */
-		/* Fences */
-		addTransparentBlock(Material.FENCE);
-		addTransparentBlock(Material.FENCE_GATE);
-		addTransparentBlock(Material.IRON_FENCE);
-		addTransparentBlock(Material.NETHER_FENCE);
-		/* Ladders, Signs */
-		addTransparentBlock(Material.LADDER);
-		addTransparentBlock(Material.SIGN_POST);
-		addTransparentBlock(Material.WALL_SIGN);
-		/* Bed */
-		addTransparentBlock(Material.BED_BLOCK);
-		/* Pistons */
-		addTransparentBlock(Material.PISTON_EXTENSION);
-		addTransparentBlock(Material.PISTON_MOVING_PIECE);
-		addTransparentBlock(Material.RAILS);
-		/* Torch & Trapdoor */
-		addTransparentBlock(Material.TORCH);
-		addTransparentBlock(Material.TRAP_DOOR);
-		/* New */
-		addTransparentBlock(Material.BREWING_STAND);
-		addTransparentBlock(Material.WOODEN_DOOR);
-		addTransparentBlock(Material.WOOD_STEP);
-	}
-
-	/**
-	 * @param m
-	 *            The material to check if it is blacklisted
-	 * @return true if the material is black listed. False if not.
-	 */
-	public static boolean isBlacklisted(final Material m) {
-		return blacklist.contains(m);
-	}
-
-	/**
-	 * Returns true if the given location is loaded or not.
-	 *
-	 * @param loc
-	 *            The location
-	 * @return true if the given location is loaded or not.
-	 */
-	public static boolean isLoaded(final Location loc) {
-		// System.out.println("Checking isLoaded(Location loc)");
-		if (loc.getWorld() == null) {
-			// System.out.println("Is not loaded. (No world)");
-			return false;
-		}
-		// Calculate the chunks coordinates. These are 1,2,3 for each chunk, NOT
-		// location rounded to the nearest 16.
-		if (loc.getWorld().isChunkLoaded(loc.getBlockX() >> 4, loc.getBlockZ() >> 4)) {
-			// System.out.println("Chunk is loaded " + x + ", " + z);
-			return true;
-		}
-		// System.out.println("Chunk is NOT loaded " + x + ", " + z);
-		return false;
-	}
-
-	/**
-	 * @param mat
-	 *            The material to check
-	 * @return Returns true if the item is a tool (Has durability) or false if
-	 *         it doesn't.
-	 */
-	public static boolean isTool(final Material mat) {
-		return tools.contains(mat);
-	}
-
-	public static boolean isTransparent(final Material m) {
-		return transparent.contains(m);
-	}
-
-	/**
-	 * Converts a string into an item from the database.
-	 *
-	 * @param itemString
-	 *            The database string. Is the result of makeString(ItemStack
-	 *            item).
-	 * @return A new itemstack, with the properties given in the string
-	 */
-	public static ItemStack makeItem(final String itemString) {
-		final String[] itemInfo = itemString.split(":");
-		final ItemStack item = new ItemStack(Material.getMaterial(itemInfo[0]));
-		final MaterialData data = new MaterialData(Integer.parseInt(itemInfo[1]));
-		item.setData(data);
-		item.setDurability(Short.parseShort(itemInfo[2]));
-		item.setAmount(Integer.parseInt(itemInfo[3]));
-		for (int i = 4; i < itemInfo.length; i = i + 2) {
-			int level = Integer.parseInt(itemInfo[i + 1]);
-			final Enchantment ench = Enchantment.getByName(itemInfo[i]);
-			if (ench == null) {
-				continue; // Invalid
-			}
-			if (ench.canEnchantItem(item)) {
-				if (level <= 0) {
-					continue;
-				}
-				level = Math.min(ench.getMaxLevel(), level);
-				item.addEnchantment(ench, level);
-			}
-		}
-		return item;
-	}
-
-	/**
-	 * Compares two items to each other. Returns true if they match.
-	 *
-	 * @param stack1
-	 *            The first item stack
-	 * @param stack2
-	 *            The second item stack
-	 * @return true if the itemstacks match. (Material, durability, enchants,
-	 *         name)
-	 */
-	public static boolean matches(final ItemStack stack1, final ItemStack stack2) {
-		if (stack1 == stack2) {
-			return true; // Referring to the same thing, or both are null.
-		}
-		if (stack1 == null || stack2 == null) {
-			return false; // One of them is null (Can't be both, see above)
-		}
-		if (stack1.getType() != stack2.getType()) {
-			return false; // Not the same material
-		}
-		if (stack1.getDurability() != stack2.getDurability()) {
-			return false; // Not the same durability
-		}
-		if (!stack1.getEnchantments().equals(stack2.getEnchantments())) {
-			return false; // They have the same enchants
-		}
-		if (stack1.getItemMeta().hasDisplayName() || stack2.getItemMeta().hasDisplayName()) {
-			if (stack1.getItemMeta().hasDisplayName() && stack2.getItemMeta().hasDisplayName()) {
-				if (!stack1.getItemMeta().getDisplayName().equals(stack2.getItemMeta().getDisplayName())) {
-					return false; // items have different display name
-				}
-			} else {
-				return false; // one of the item stacks have a display name
-			}
-		}
-		if (stack1.getItemMeta().hasLore() || stack2.getItemMeta().hasLore()) {
-			if (stack1.getItemMeta().hasLore() && stack2.getItemMeta().hasLore()) {
-				if (!stack1.getItemMeta().getLore().equals(stack2.getItemMeta().getLore())) {
-					return false; // items have different lore
-				}
-			} else {
-				return false; // one of the item stacks have lore
-			}
-		}
-		// Not the same material and not same durability has returned to false
-		if (stack1.getType() == Material.SKULL_ITEM) {
-			if (stack1.getDurability() == 3) {
-				SkullMeta skullMeta1 = (SkullMeta) stack1.getItemMeta();
-				SkullMeta skullMeta2 = (SkullMeta) stack2.getItemMeta();
-				if (skullMeta1.hasOwner() || skullMeta2.hasOwner()) {
-					if (skullMeta1.hasOwner() && skullMeta2.hasOwner()) {
-						if (!skullMeta1.getOwner().equals(skullMeta1.getOwner())) {
-							return false;
-						}
-					} else {
-						return false;
-					}
-				}
-			}
-
-		}
-		if (stack1.getType() == Material.WRITTEN_BOOK) {
-			if (stack1.hasItemMeta() || stack2.hasItemMeta()) {
-				if (stack1.hasItemMeta() && stack2.hasItemMeta()) {
-					BookMeta bookMeta1 = (BookMeta) stack1.getItemMeta();
-					BookMeta bookMeta2 = (BookMeta) stack2.getItemMeta();
-					// title
-					if (bookMeta1.hasTitle() || bookMeta2.hasTitle()) {
-						if (bookMeta1.hasTitle() && bookMeta2.hasTitle()) {
-							if (!bookMeta1.getTitle().equals(bookMeta2.getTitle())) {
-								return false;
-							}
-						} else {
-							return false;
-						}
-					}
-					// author
-					if (bookMeta1.hasAuthor() || bookMeta2.hasAuthor()) {
-						if (bookMeta1.hasAuthor() && bookMeta2.hasAuthor()) {
-							if (!bookMeta1.getAuthor().equals(bookMeta2.getAuthor())) {
-								return false;
-							}
-						} else {
-							return false;
-						}
-					}
-					// content
-					if (bookMeta1.hasPages() || bookMeta2.hasPages()) {
-						if (bookMeta1.hasPages() && bookMeta2.hasPages()) {
-							if (!bookMeta1.getPages().equals(bookMeta2.getPages())) {
-								return false;
-							}
-						} else {
-							return false;
-						}
-					}
-				} else {
-					return false;
-				}
-			}
-		}
-		try {
-			Class.forName("org.bukkit.inventory.meta.EnchantmentStorageMeta");
-			final boolean book1 = stack1.getItemMeta() instanceof EnchantmentStorageMeta;
-			final boolean book2 = stack2.getItemMeta() instanceof EnchantmentStorageMeta;
-			if (book1 != book2) {
-				return false;// One has enchantment meta, the other does not.
-			}
-			if (book1) { // They are the same here (both true or both
-							// false). So if one is true, the other is
-							// true.
-				final Map<Enchantment, Integer> ench1 = ((EnchantmentStorageMeta) stack1.getItemMeta()).getStoredEnchants();
-				final Map<Enchantment, Integer> ench2 = ((EnchantmentStorageMeta) stack2.getItemMeta()).getStoredEnchants();
-				if (!ench1.equals(ench2)) {
-					return false; // Enchants aren't the same.
-				}
-			}
-		} catch (final ClassNotFoundException e) {
-			// Nothing. They dont have a build high enough to support this.
-		}
-		return true;
-	}
-
-	public static void parseColours(final YamlConfiguration config) {
-		final Set<String> keys = config.getKeys(true);
-		for (final String key : keys) {
-			String filtered = config.getString(key);
-			if (filtered.startsWith("MemorySection")) {
-				continue;
-			}
-			filtered = ChatColor.translateAlternateColorCodes('&', filtered);
-			config.set(key, filtered);
-		}
-	}
-
-	public static String serialize(final ItemStack iStack) {
-		final YamlConfiguration cfg = new YamlConfiguration();
-		cfg.set("item", iStack);
-		return cfg.saveToString();
-	}
-}
+package org.maxgamer.QuickShop.Util;
+
+import java.lang.reflect.Method;
+import java.text.DecimalFormat;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.bukkit.ChatColor;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.BlockState;
+import org.bukkit.configuration.InvalidConfigurationException;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.InventoryHolder;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.BookMeta;
+import org.bukkit.inventory.meta.EnchantmentStorageMeta;
+import org.bukkit.inventory.meta.SkullMeta;
+import org.bukkit.material.MaterialData;
+import org.bukkit.material.Sign;
+import org.maxgamer.QuickShop.QuickShop;
+
+import pw.yumc.YumCore.global.L10N;
+
+@SuppressWarnings("deprecation")
+public class Util {
+
+	private static HashSet<Material> blacklist = new HashSet<>();
+	private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat("#.##");
+	private static QuickShop plugin;
+	private static HashSet<Material> shoppables = new HashSet<>();
+	private static HashSet<Material> tools = new HashSet<>();
+	private static HashSet<Material> transparent = new HashSet<>();
+
+	private static boolean hasCheckedMethodCompatibility = false;
+	private static boolean useNewGetContentMethod = false;
+
+	public static void addTransparentBlock(final Material m) {
+		if (!transparent.add(m)) {
+			System.out.println("已添加透明方块: " + m.toString());
+		}
+		if (!m.isBlock()) {
+			System.out.println(m + " 不是一个方块!");
+		}
+	}
+
+	/**
+	 * Returns true if the given block could be used to make a shop out of.
+	 *
+	 * @param b
+	 *            The block to check. Possibly a chest, dispenser, etc.
+	 * @return True if it can be made into a shop, otherwise false.
+	 */
+	public static boolean canBeShop(final Block b) {
+		try {
+			final BlockState bs = b.getState();
+			return bs instanceof InventoryHolder && shoppables.contains(bs.getType());
+		} catch (final Exception e) {
+			return false;
+		}
+	}
+
+	/**
+	 * Counts the number of items in the given inventory where
+	 * Util.matches(inventory item, item) is true.
+	 *
+	 * @param inv
+	 *            The inventory to search
+	 * @param item
+	 *            The ItemStack to search for
+	 * @return The number of items that match in this inventory.
+	 */
+	public static int countItems(final Inventory inv, final ItemStack item) {
+		if (!hasCheckedMethodCompatibility) {
+			if (hasGetStorageContentsMethod()) {
+				useNewGetContentMethod = true;
+				hasCheckedMethodCompatibility = true;
+				return newCountItems(inv, item);
+			} else {
+				useNewGetContentMethod = false;
+				hasCheckedMethodCompatibility = true;
+				return oldCountItems(inv, item);
+			}
+		}
+		return useNewGetContentMethod ? newCountItems(inv, item) : oldCountItems(inv, item);
+	}
+
+	public static int oldCountItems(final Inventory inv, final ItemStack item) {
+		int items = 0;
+		for (final ItemStack iStack : inv.getContents()) {
+			if (iStack == null) {
+				continue;
+			}
+			if (Util.matches(item, iStack)) {
+				items += iStack.getAmount();
+			}
+		}
+		return items;
+	}
+
+	public static int newCountItems(final Inventory inv, final ItemStack item) {
+		int items = 0;
+		for (final ItemStack iStack : inv.getStorageContents()) {
+			if (iStack == null) {
+				continue;
+			}
+			if (Util.matches(item, iStack)) {
+				items += iStack.getAmount();
+			}
+		}
+		return items;
+	}
+
+	/**
+	 * Returns the number of items that can be given to the inventory safely.
+	 *
+	 * @param inv
+	 *            The inventory to count
+	 * @param item
+	 *            The item prototype. Material, durabiltiy and enchants must
+	 *            match for 'stackability' to occur.
+	 * @return The number of items that can be given to the inventory safely.
+	 */
+	public static int countSpace(final Inventory inv, final ItemStack item) {
+		if (!hasCheckedMethodCompatibility) {
+			if (hasGetStorageContentsMethod()) {
+				useNewGetContentMethod = true;
+				hasCheckedMethodCompatibility = true;
+				return newCountSpace(inv, item);
+			} else {
+				useNewGetContentMethod = false;
+				hasCheckedMethodCompatibility = true;
+				return oldCountSpace(inv, item);
+			}
+		}
+		return useNewGetContentMethod ? newCountSpace(inv, item) : oldCountSpace(inv, item);
+	}
+
+	public static int newCountSpace(final Inventory inv, final ItemStack item) {
+		int space = 0;
+		for (final ItemStack iStack : inv.getStorageContents()) {
+			if (iStack == null || iStack.getType() == Material.AIR) {
+				space += item.getMaxStackSize();
+			} else if (matches(item, iStack)) {
+				space += item.getMaxStackSize() - iStack.getAmount();
+			}
+		}
+		return space;
+	}
+
+	public static int oldCountSpace(final Inventory inv, final ItemStack item) {
+		int space = 0;
+		for (final ItemStack iStack : inv.getContents()) {
+			if (iStack == null || iStack.getType() == Material.AIR) {
+				space += item.getMaxStackSize();
+			} else if (matches(item, iStack)) {
+				space += item.getMaxStackSize() - iStack.getAmount();
+			}
+		}
+		return space;
+	}
+
+	public static ItemStack deserialize(final String config) throws InvalidConfigurationException {
+		final YamlConfiguration cfg = new YamlConfiguration();
+		cfg.loadFromString(config);
+		return cfg.getItemStack("item");
+	}
+
+	public static String firstUppercase(final String string) {
+		if (string.length() > 1) {
+			return Character.toUpperCase(string.charAt(0)) + string.substring(1).toLowerCase();
+		}
+		return string.toUpperCase();
+	}
+
+	/**
+	 * Formats the given number according to how vault would like it. E.g. $50
+	 * or 5 dollars.
+	 *
+	 * @return The formatted string.
+	 */
+	public static String format(final double n) {
+		try {
+			return DECIMAL_FORMAT.format(n) + plugin.getEcon().currencyNamePlural();
+		} catch (final NumberFormatException e) {
+			return n + "元";
+		}
+	}
+
+	/**
+	 * Fetches the block which the given sign is attached to
+	 *
+	 * @param b
+	 *            The sign which is attached
+	 * @return The block the sign is attached to
+	 */
+	public static Block getAttached(final Block b) {
+		try {
+			final Sign sign = (Sign) b.getState().getData(); // Throws a NPE
+			// sometimes??
+			final BlockFace attached = sign.getAttachedFace();
+			return attached == null ? null : b.getRelative(attached);
+		} catch (final NullPointerException e) {
+			return null; // /Not sure what causes this.
+		}
+	}
+
+	/**
+	 * Fetches an ItemStack's name - For example, converting INK_SAC:11 to
+	 * Dandellion Yellow, or WOOL:14 to Red Wool
+	 *
+	 * @param i
+	 *            The itemstack to fetch the name of
+	 * @return The human readable item name.
+	 */
+	public static String getName(final ItemStack i) {
+		return L10N.getItemName(i);
+	}
+
+	// Let's make very long names shorter for our sign
+	public static String getNameForSign(final ItemStack itemStack) {
+		String name = getName(itemStack);
+		if (name.length() > 16) {
+			name = name.substring(0, 16);
+		}
+		return name;
+	}
+
+	/**
+	 * Returns the chest attached to the given chest. The given block must be a
+	 * chest.
+	 *
+	 * @param b
+	 *            The chest to check.
+	 * @return the block which is also a chest and connected to b.
+	 */
+	public static Block getSecondHalf(final Block b) {
+		if (!b.getType().toString().contains("CHEST")) {
+			return null;
+		}
+		final Block[] blocks = new Block[4];
+		blocks[0] = b.getRelative(1, 0, 0);
+		blocks[1] = b.getRelative(-1, 0, 0);
+		blocks[2] = b.getRelative(0, 0, 1);
+		blocks[3] = b.getRelative(0, 0, -1);
+		for (final Block c : blocks) {
+			if (c.getType() == b.getType()) {
+				return c;
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * Gets the percentage (Without trailing %) damage on a tool.
+	 *
+	 * @param item
+	 *            The ItemStack of tools to check
+	 * @return The percentage 'health' the tool has. (Opposite of total damage)
+	 */
+	public static String getToolPercentage(final ItemStack item) {
+		final double dura = item.getDurability();
+		final double max = item.getType().getMaxDurability();
+		return String.format("%.2f%%(剩余耐久%s/总耐久%s)", (1 - dura / max) * 100.0, max - dura, max);
+	}
+
+	public static void initialize() {
+		tools.clear();
+		blacklist.clear();
+		shoppables.clear();
+		transparent.clear();
+		plugin = QuickShop.instance;
+		for (final String s : plugin.getConfig().getStringList("shop-blocks")) {
+			Material mat = Material.getMaterial(s.toUpperCase());
+			if (mat == null) {
+				try {
+					mat = Material.getMaterial(Integer.parseInt(s));
+				} catch (final NumberFormatException ignored) {
+				}
+			}
+			if (mat == null) {
+				plugin.getLogger().info("Invalid shop-block: " + s);
+			} else {
+				shoppables.add(mat);
+			}
+		}
+		tools.add(Material.BOW);
+		tools.add(Material.SHEARS);
+		tools.add(Material.FISHING_ROD);
+		tools.add(Material.FLINT_AND_STEEL);
+		tools.add(Material.CHAINMAIL_BOOTS);
+		tools.add(Material.CHAINMAIL_CHESTPLATE);
+		tools.add(Material.CHAINMAIL_HELMET);
+		tools.add(Material.CHAINMAIL_LEGGINGS);
+		tools.add(Material.WOOD_AXE);
+		tools.add(Material.WOOD_HOE);
+		tools.add(Material.WOOD_PICKAXE);
+		tools.add(Material.WOOD_SPADE);
+		tools.add(Material.WOOD_SWORD);
+		tools.add(Material.LEATHER_BOOTS);
+		tools.add(Material.LEATHER_CHESTPLATE);
+		tools.add(Material.LEATHER_HELMET);
+		tools.add(Material.LEATHER_LEGGINGS);
+		tools.add(Material.DIAMOND_AXE);
+		tools.add(Material.DIAMOND_HOE);
+		tools.add(Material.DIAMOND_PICKAXE);
+		tools.add(Material.DIAMOND_SPADE);
+		tools.add(Material.DIAMOND_SWORD);
+		tools.add(Material.DIAMOND_BOOTS);
+		tools.add(Material.DIAMOND_CHESTPLATE);
+		tools.add(Material.DIAMOND_HELMET);
+		tools.add(Material.DIAMOND_LEGGINGS);
+		tools.add(Material.STONE_AXE);
+		tools.add(Material.STONE_HOE);
+		tools.add(Material.STONE_PICKAXE);
+		tools.add(Material.STONE_SPADE);
+		tools.add(Material.STONE_SWORD);
+		tools.add(Material.GOLD_AXE);
+		tools.add(Material.GOLD_HOE);
+		tools.add(Material.GOLD_PICKAXE);
+		tools.add(Material.GOLD_SPADE);
+		tools.add(Material.GOLD_SWORD);
+		tools.add(Material.GOLD_BOOTS);
+		tools.add(Material.GOLD_CHESTPLATE);
+		tools.add(Material.GOLD_HELMET);
+		tools.add(Material.GOLD_LEGGINGS);
+		tools.add(Material.IRON_AXE);
+		tools.add(Material.IRON_HOE);
+		tools.add(Material.IRON_PICKAXE);
+		tools.add(Material.IRON_SPADE);
+		tools.add(Material.IRON_SWORD);
+		tools.add(Material.IRON_BOOTS);
+		tools.add(Material.IRON_CHESTPLATE);
+		tools.add(Material.IRON_HELMET);
+		tools.add(Material.IRON_LEGGINGS);
+		final List<String> configBlacklist = plugin.getConfig().getStringList("blacklist");
+		for (final String s : configBlacklist) {
+			Material mat = Material.getMaterial(s.toUpperCase());
+			if (mat == null) {
+				mat = Material.getMaterial(Integer.parseInt(s));
+				if (mat == null) {
+					plugin.getLogger().info(s + " is not a valid material.  Check your spelling or ID");
+					continue;
+				}
+			}
+			blacklist.add(mat);
+		}
+
+		// ToDo: add extras to config file
+		addTransparentBlock(Material.AIR);
+		/* Misc */
+		addTransparentBlock(Material.CAKE_BLOCK);
+		/* Redstone Material */
+		addTransparentBlock(Material.REDSTONE_WIRE);
+		/* Redstone Torches */
+		addTransparentBlock(Material.REDSTONE_TORCH_OFF);
+		addTransparentBlock(Material.REDSTONE_TORCH_ON);
+		/* Diodes (Repeaters) */
+		addTransparentBlock(Material.DIODE_BLOCK_OFF);
+		addTransparentBlock(Material.DIODE_BLOCK_ON);
+		/* Power Sources */
+		addTransparentBlock(Material.DETECTOR_RAIL);
+		addTransparentBlock(Material.LEVER);
+		addTransparentBlock(Material.STONE_BUTTON);
+		addTransparentBlock(Material.WOOD_BUTTON);
+		addTransparentBlock(Material.STONE_PLATE);
+		addTransparentBlock(Material.WOOD_PLATE);
+		/* Nature Material */
+		addTransparentBlock(Material.RED_MUSHROOM);
+		addTransparentBlock(Material.BROWN_MUSHROOM);
+		addTransparentBlock(Material.RED_ROSE);
+		addTransparentBlock(Material.YELLOW_FLOWER);
+		addTransparentBlock(Material.FLOWER_POT);
+		/* Greens */
+		addTransparentBlock(Material.LONG_GRASS);
+		addTransparentBlock(Material.VINE);
+		addTransparentBlock(Material.WATER_LILY);
+		/* Seedy things */
+		addTransparentBlock(Material.MELON_STEM);
+		addTransparentBlock(Material.PUMPKIN_STEM);
+		addTransparentBlock(Material.CROPS);
+		addTransparentBlock(Material.NETHER_WARTS);
+		/* Semi-nature */
+		addTransparentBlock(Material.SNOW);
+		addTransparentBlock(Material.FIRE);
+		addTransparentBlock(Material.WEB);
+		addTransparentBlock(Material.TRIPWIRE);
+		addTransparentBlock(Material.TRIPWIRE_HOOK);
+		/* Stairs */
+		addTransparentBlock(Material.COBBLESTONE_STAIRS);
+		addTransparentBlock(Material.BRICK_STAIRS);
+		addTransparentBlock(Material.SANDSTONE_STAIRS);
+		addTransparentBlock(Material.NETHER_BRICK_STAIRS);
+		addTransparentBlock(Material.SMOOTH_STAIRS);
+		/* Wood Stairs */
+		addTransparentBlock(Material.BIRCH_WOOD_STAIRS);
+		addTransparentBlock(Material.WOOD_STAIRS);
+		addTransparentBlock(Material.JUNGLE_WOOD_STAIRS);
+		addTransparentBlock(Material.SPRUCE_WOOD_STAIRS);
+		/* Lava & Water */
+		addTransparentBlock(Material.LAVA);
+		addTransparentBlock(Material.STATIONARY_LAVA);
+		addTransparentBlock(Material.WATER);
+		addTransparentBlock(Material.STATIONARY_WATER);
+		/* Saplings and bushes */
+		addTransparentBlock(Material.SAPLING);
+		addTransparentBlock(Material.DEAD_BUSH);
+		/* Construction Material */
+		/* Fences */
+		addTransparentBlock(Material.FENCE);
+		addTransparentBlock(Material.FENCE_GATE);
+		addTransparentBlock(Material.IRON_FENCE);
+		addTransparentBlock(Material.NETHER_FENCE);
+		/* Ladders, Signs */
+		addTransparentBlock(Material.LADDER);
+		addTransparentBlock(Material.SIGN_POST);
+		addTransparentBlock(Material.WALL_SIGN);
+		/* Bed */
+		addTransparentBlock(Material.BED_BLOCK);
+		/* Pistons */
+		addTransparentBlock(Material.PISTON_EXTENSION);
+		addTransparentBlock(Material.PISTON_MOVING_PIECE);
+		addTransparentBlock(Material.RAILS);
+		/* Torch & Trapdoor */
+		addTransparentBlock(Material.TORCH);
+		addTransparentBlock(Material.TRAP_DOOR);
+		/* New */
+		addTransparentBlock(Material.BREWING_STAND);
+		addTransparentBlock(Material.WOODEN_DOOR);
+		addTransparentBlock(Material.WOOD_STEP);
+	}
+
+	/**
+	 * @param m
+	 *            The material to check if it is blacklisted
+	 * @return true if the material is black listed. False if not.
+	 */
+	public static boolean isBlacklisted(final Material m) {
+		return blacklist.contains(m);
+	}
+
+	/**
+	 * Returns true if the given location is loaded or not.
+	 *
+	 * @param loc
+	 *            The location
+	 * @return true if the given location is loaded or not.
+	 */
+	public static boolean isLoaded(final Location loc) {
+		// System.out.println("Checking isLoaded(Location loc)");
+		if (loc.getWorld() == null) {
+			// System.out.println("Is not loaded. (No world)");
+			return false;
+		}
+		// Calculate the chunks coordinates. These are 1,2,3 for each chunk, NOT
+		// location rounded to the nearest 16.
+		if (loc.getWorld().isChunkLoaded(loc.getBlockX() >> 4, loc.getBlockZ() >> 4)) {
+			// System.out.println("Chunk is loaded " + x + ", " + z);
+			return true;
+		}
+		// System.out.println("Chunk is NOT loaded " + x + ", " + z);
+		return false;
+	}
+
+	/**
+	 * @param mat
+	 *            The material to check
+	 * @return Returns true if the item is a tool (Has durability) or false if
+	 *         it doesn't.
+	 */
+	public static boolean isTool(final Material mat) {
+		return tools.contains(mat);
+	}
+
+	public static boolean isTransparent(final Material m) {
+		return transparent.contains(m);
+	}
+
+	/**
+	 * Converts a string into an item from the database.
+	 *
+	 * @param itemString
+	 *            The database string. Is the result of makeString(ItemStack
+	 *            item).
+	 * @return A new itemstack, with the properties given in the string
+	 */
+	public static ItemStack makeItem(final String itemString) {
+		final String[] itemInfo = itemString.split(":");
+		final ItemStack item = new ItemStack(Material.getMaterial(itemInfo[0]));
+		final MaterialData data = new MaterialData(Integer.parseInt(itemInfo[1]));
+		item.setData(data);
+		item.setDurability(Short.parseShort(itemInfo[2]));
+		item.setAmount(Integer.parseInt(itemInfo[3]));
+		for (int i = 4; i < itemInfo.length; i = i + 2) {
+			int level = Integer.parseInt(itemInfo[i + 1]);
+			final Enchantment ench = Enchantment.getByName(itemInfo[i]);
+			if (ench == null) {
+				continue; // Invalid
+			}
+			if (ench.canEnchantItem(item)) {
+				if (level <= 0) {
+					continue;
+				}
+				level = Math.min(ench.getMaxLevel(), level);
+				item.addEnchantment(ench, level);
+			}
+		}
+		return item;
+	}
+
+	/**
+	 * Compares two items to each other. Returns true if they match.
+	 *
+	 * @param stack1
+	 *            The first item stack
+	 * @param stack2
+	 *            The second item stack
+	 * @return true if the itemstacks match. (Material, durability, enchants,
+	 *         name)
+	 */
+	public static boolean matches(final ItemStack stack1, final ItemStack stack2) {
+		if (stack1 == stack2) {
+			return true; // Referring to the same thing, or both are null.
+		}
+		if (stack1 == null || stack2 == null) {
+			return false; // One of them is null (Can't be both, see above)
+		}
+		if (stack1.getType() != stack2.getType()) {
+			return false; // Not the same material
+		}
+		if (stack1.getDurability() != stack2.getDurability()) {
+			return false; // Not the same durability
+		}
+		if (!stack1.getEnchantments().equals(stack2.getEnchantments())) {
+			return false; // They have the same enchants
+		}
+		if (stack1.getItemMeta().hasDisplayName() || stack2.getItemMeta().hasDisplayName()) {
+			if (stack1.getItemMeta().hasDisplayName() && stack2.getItemMeta().hasDisplayName()) {
+				if (!stack1.getItemMeta().getDisplayName().equals(stack2.getItemMeta().getDisplayName())) {
+					return false; // items have different display name
+				}
+			} else {
+				return false; // one of the item stacks have a display name
+			}
+		}
+		if (stack1.getItemMeta().hasLore() || stack2.getItemMeta().hasLore()) {
+			if (stack1.getItemMeta().hasLore() && stack2.getItemMeta().hasLore()) {
+				if (!stack1.getItemMeta().getLore().equals(stack2.getItemMeta().getLore())) {
+					return false; // items have different lore
+				}
+			} else {
+				return false; // one of the item stacks have lore
+			}
+		}
+		// Not the same material and not same durability has returned to false
+		if (stack1.getType() == Material.SKULL_ITEM) {
+			if (stack1.getDurability() == 3) {
+				SkullMeta skullMeta1 = (SkullMeta) stack1.getItemMeta();
+				SkullMeta skullMeta2 = (SkullMeta) stack2.getItemMeta();
+				if (skullMeta1.hasOwner() || skullMeta2.hasOwner()) {
+					if (skullMeta1.hasOwner() && skullMeta2.hasOwner()) {
+						if (!skullMeta1.getOwner().equals(skullMeta1.getOwner())) {
+							return false;
+						}
+					} else {
+						return false;
+					}
+				}
+			}
+
+		}
+		if (stack1.getType() == Material.WRITTEN_BOOK) {
+			if (stack1.hasItemMeta() || stack2.hasItemMeta()) {
+				if (stack1.hasItemMeta() && stack2.hasItemMeta()) {
+					BookMeta bookMeta1 = (BookMeta) stack1.getItemMeta();
+					BookMeta bookMeta2 = (BookMeta) stack2.getItemMeta();
+					// title
+					if (bookMeta1.hasTitle() || bookMeta2.hasTitle()) {
+						if (bookMeta1.hasTitle() && bookMeta2.hasTitle()) {
+							if (!bookMeta1.getTitle().equals(bookMeta2.getTitle())) {
+								return false;
+							}
+						} else {
+							return false;
+						}
+					}
+					// author
+					if (bookMeta1.hasAuthor() || bookMeta2.hasAuthor()) {
+						if (bookMeta1.hasAuthor() && bookMeta2.hasAuthor()) {
+							if (!bookMeta1.getAuthor().equals(bookMeta2.getAuthor())) {
+								return false;
+							}
+						} else {
+							return false;
+						}
+					}
+					// content
+					if (bookMeta1.hasPages() || bookMeta2.hasPages()) {
+						if (bookMeta1.hasPages() && bookMeta2.hasPages()) {
+							if (!bookMeta1.getPages().equals(bookMeta2.getPages())) {
+								return false;
+							}
+						} else {
+							return false;
+						}
+					}
+				} else {
+					return false;
+				}
+			}
+		}
+		try {
+			Class.forName("org.bukkit.inventory.meta.EnchantmentStorageMeta");
+			final boolean book1 = stack1.getItemMeta() instanceof EnchantmentStorageMeta;
+			final boolean book2 = stack2.getItemMeta() instanceof EnchantmentStorageMeta;
+			if (book1 != book2) {
+				return false;// One has enchantment meta, the other does not.
+			}
+			if (book1) { // They are the same here (both true or both
+							// false). So if one is true, the other is
+							// true.
+				final Map<Enchantment, Integer> ench1 = ((EnchantmentStorageMeta) stack1.getItemMeta()).getStoredEnchants();
+				final Map<Enchantment, Integer> ench2 = ((EnchantmentStorageMeta) stack2.getItemMeta()).getStoredEnchants();
+				if (!ench1.equals(ench2)) {
+					return false; // Enchants aren't the same.
+				}
+			}
+		} catch (final ClassNotFoundException e) {
+			// Nothing. They dont have a build high enough to support this.
+		}
+		return true;
+	}
+
+	public static void parseColours(final YamlConfiguration config) {
+		final Set<String> keys = config.getKeys(true);
+		for (final String key : keys) {
+			String filtered = config.getString(key);
+			if (filtered.startsWith("MemorySection")) {
+				continue;
+			}
+			filtered = ChatColor.translateAlternateColorCodes('&', filtered);
+			config.set(key, filtered);
+		}
+	}
+
+	public static String serialize(final ItemStack iStack) {
+		final YamlConfiguration cfg = new YamlConfiguration();
+		cfg.set("item", iStack);
+		return cfg.saveToString();
+	}
+
+	public static boolean hasGetStorageContentsMethod() {
+		try {
+			Class<?> inventory = Class.forName("org.bukkit.inventory.Inventory");
+			if (inventory != null) {
+				for (Method method : inventory.getDeclaredMethods()) {
+					if (method != null && method.getName().equals("getStorageContents")) {
+						return true;
+					}
+				}
+			}
+			return false;
+		} catch (Exception e) {
+			return false;
+		}
+	}
+}