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;

     }