code: public static void splitFile(String filePath, long[] splitPoints, String storageFolder) throws IOException {
          splitFile(new File(filePath), splitPoints, storageFolder);
      }
docs: 拆分文件
  
  @param filePath 文件路径
  @param splitPoints 拆分点数组（函数将根据拆分点来分割文件）
  @param storageFolder 保存路径
  
  @throws IOException 异常