暮色呼如
好的，这个问题已经很老了，但是FileChannels自Java 1.4起就存在了，我不知道为什么在替换或插入文件内容的问题上没有提到它们。FileChannel很快，请使用它们。这是一个示例(忽略异常和其他内容)：public void insert(String filename, long offset, byte[] content) { RandomAccessFile r = new RandomAccessFile(new File(filename), "rw"); RandomAccessFile rtemp = new RandomAccessFile(new File(filename + "~"), "rw"); long fileSize = r.length(); FileChannel sourceChannel = r.getChannel(); FileChannel targetChannel = rtemp.getChannel(); sourceChannel.transferTo(offset, (fileSize - offset), targetChannel); sourceChannel.truncate(offset); r.seek(offset); r.write(content); long newOffset = r.getFilePointer(); targetChannel.position(0L); sourceChannel.transferFrom(targetChannel, newOffset, (fileSize - offset)); sourceChannel.close(); targetChannel.close();}