How to simple manage NBT structured files?

I want to write a map booster plugin, and I want to add the simple map loading, from map file function to it, but I don't know, how can I access to any NBT structured file without creating a custom decompiler. So I want to access for example this file in my server: world\data\map_0.dat

 

gyurix JNBT.

 

Ok, but where Can I found it?
Is it an external library?
Am I really need anything external, if the nbt management is built-in to Bukkit?

 

gyurix You can google that library's name and you'll find it. And it's not built into the Bukkit API. You're better off just including the library.

 

Really not included? Then how can Bukkit manage these files? Because every Minecraft world data uses this format. So maybe not this library is included, but something must be in the Bukkit, that manage the worlds, player data's etc.

 

https://github.com/Bukkit/CraftBukkit

Hit 't'.

Type 'NBT'.