最近有很人说怎么把类文件里的地图数据转成文件形式存储起来.以便节省内存.所有小弟把自己的共享出来.方便大家使用.-Recently, people have said is how the type of file into the map data stored in document form. In order to save memory. All the boy put out his own share. To facilitate the use of everyone.