src/org/nutz/filepool/NutFilePool.java
public static FilePool getOrCreatePool(String path, long limit) {
        FilePool pool = pools.get(path);
        if (pool == null) {
            pool = new NutFilePool(path, limit);
            pool = new SynchronizedFilePool(pool);
            pools.put(path, pool);
        }
        return pool;
    }
public static FilePool getOrCreatePool(String path, long limit) {
        FilePool pool = pools.get(path);
        if (pool == null) {
            pool = new NutFilePool(path, limit);
            pool = new SynchronizedFilePool(pool);
            pools.put(path, pool);
        }
        return pool;
    }
获取指定路径下的FilePool,如果没有就新建一个
@param path 临时文件夹
@param limit 最大文件数量
@return 已有或新建的FilePool同步实例