使用FileChannel：Java从RandomAccessFile读取特定字节

Question

I have a RandomAccessFile and its FileChannel. What I'm trying to do is read a specific section of the bytes from said file; however, while looking over the FileChannel read methods, I didn't see overloads that would help with what I'm trying to do, only methods which would read the entire content, or read content to a specific position in the buffer that the read method takes in. Is there a method that I'm missing that will help me accomplish my goal of reading a specific chunk of bytes, or will I need to read in the entire channel into the buffer and then parse out the section somehow?

Answer 1

您可以使用FileChannel#position(long)转到文件中的特定位置，然后read所需大小的缓冲区。