使用如下方式写入，可以将多个 buffer 的数据填充至 channel
try (RandomAccessFile file = new RandomAccessFile("helloword/3parts.txt", "rw")) { FileChannel channel = file.getChannel(); ByteBuffer d = ByteBuffer.allocate(4); ByteBuffer e = ByteBuffer.allocate(4); channel.position(11);
d.put(new byte[]{'f', 'o', 'u', 'r'});
e.put(new byte[]{'f', 'i', 'v', 'e'});
d.flip();
e.flip();
debug(d);
debug(e);
channel.write(new ByteBuffer[]{d, e});
} catch (IOException e) { e.printStackTrace(); }
结果 +-------------------------------------------------+ | 0 1 2 3 4 5 6 7 8 9 a b c d e f | +--------+-------------------------------------------------+----------------+ |00000000| 66 6f 75 72 |four | +--------+-------------------------------------------------+----------------+ +-------------------------------------------------+ | 0 1 2 3 4 5 6 7 8 9 a b c d e f | +--------+-------------------------------------------------+----------------+ |00000000| 66 69 76 65 |five
文件内容 onetwothreefourfive|
