我尝试逐块比较两个文件。如果块相等 - 获取下一个块并比较它们。如果最终块相等 - 返回 true;所有其他变体 - 返回 false。我不明白如何正确处理下一个块以及如何获得文件结尾。
private static boolean getBlocks(File file1, File file2, int count) throws IOException {
RandomAccessFile raf1 = new RandomAccessFile(file1, "r");
RandomAccessFile raf2 = new RandomAccessFile(file2, "r");
int point = count * 512;
FileChannel fc1 = raf1.getChannel();
FileChannel fc2 = raf2.getChannel();
MappedByteBuffer buffer1 = fc1.map(FileChannel.MapMode.READ_ONLY, point, 512);
MappedByteBuffer buffer2 = fc2.map(FileChannel.MapMode.READ_ONLY, point, 512);
byte[] bytes1 = new byte[512];
byte[] bytes2 = new byte[512];
buffer1.get(bytes1);
buffer2.get(bytes2);
if (bytes1.length == bytes2.length) {
for (int i = 0; i < bytes1.length; i++) {
if(bytes1[i] != bytes2[i]) {
return false;
}
}
if (true) {
count++;
getBlocks(file1, file2, point);
}
}
buffer1.clear();
buffer2.clear();
return true;
}