private static final int start = 0;
public static void main(String[] args) throws IOException {
RandomAccessFile raf = new RandomAccessFile("D:/mapper.txt", "rw");
FileChannel fileChannel = raf.getChannel();
String a = "我要寫入文件";
MappedByteBuffer mbb = fileChannel.map(FileChannel.MapMode.READ_WRITE, start, a.getBytes().length+1);
mbb.put(a.getBytes());
mbb.flip();
byte[] bb = new byte[mbb.capacity()];
while (mbb.hasRemaining()){
byte b = mbb.get();
bb[mbb.position()]=b;
}
System.out.println(new String(bb));
raf.close();
}
MappedByteBuffer 高效讀寫文件
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