Reads a stream of bytes from the specified column offset into the buffer an array starting at the given buffer offset 从指定的列偏移量将字节流读入缓冲区，并将其作为从给定的缓冲区偏移量开始的数组。
Reads a stream of characters from the specified column offset into the buffer as an array , starting at the particular buffer offset 从指定的列偏移量将字符流作为数组从特定的缓冲区偏移量开始读入缓冲区。
Reads a stream of bytes starting at the specified column offset into the buffer as an array starting at the specified buffer offset 将从指定列偏移量开始的字节流作为从指定缓冲区偏移量开始的数组读入缓冲区中。
