Bukkit之yaml动态读取

在使用bukkit框架写插件的时候会经常使用到yml格式的文件来存储配置或者玩家数据，这里来说一下实现yml中数据的动态读写：

先来看一下yml文件中的内容结构

public boolean addBanSyntheseItem(CommandSender sender, Command cmd, String[] args) {
        List list = new ArrayList<>();
        Player player = (Player) sender;
        ItemStack itemStack = player.getItemInHand();
        File airdropFile = new File(Pickaxe.CONFIGPATH);
        if(airdropFile.exists()) {
            YamlConfiguration yc = new YamlConfiguration();
            try {
                yc.load(airdropFile);
            } catch (Exception e) {
                e.printStackTrace();
                return false;
            }
            Set set = yc.getConfigurationSection("banItemList").getKeys(false);
            int count = set.size();
            //如果yml配置文件是空的，创建根节点，并且添加内容
            if(count == 0) {
                ConfigurationSection listSection = yc.createSection("banItemList");
                 Map<String, Object> item = new HashMap();
                 item.put("id",itemStack.getTypeId());
                 item.put("durability", (int)itemStack.getDurability());
                 item.put("type", itemStack.getType().toString());
                 item.put("displayName", itemStack.getItemMeta().getDisplayName());
                 item.put("lore", itemStack.getItemMeta().getLore());
                 listSection.createSection(Integer.toString(itemStack.getTypeId()),item); 
                 try {
                    yc.save(Pickaxe.CONFIGPATH);
                    return true;
                } catch (IOException e) {
                    e.printStackTrace();
                    return false;
                }
            }else if(count>0) {    //如果yml中有内容，这直接在其后面追加内容
                ConfigurationSection section = yc.getConfigurationSection("banItemList");
                 Map<String, Object> item = new HashMap();
                item.put("id",itemStack.getTypeId());
                item.put("durability", (int)itemStack.getDurability());
                item.put("type", itemStack.getType().toString());
                item.put("displayName", itemStack.getItemMeta().getDisplayName());
                item.put("lore", itemStack.getItemMeta().getLore());
                section.createSection(Integer.toString(itemStack.getTypeId()),item);
                try {
                    yc.save(Pickaxe.CONFIGPATH);
                    return true;
                } catch (IOException e) {
                    e.printStackTrace();
                    return false;
                }
            }
        }
        return false;
        
    }