RandomAccessFile randomAccessFile = new RandomAccessFile(file,"rw"); FileChannel fileChannel = randomAccessFile.getChannel(); long size = fileChannel.size(); MappedByteBuffer mappedByteBuffer = fileChannel.map(FileChannel.MapMode.READ_WRITE,0,size); for ( int i = 0 ; i < size; i++){ byte b = mappedByteBuffer.get(i); mappedByteBuffer.put(i,b); } randomAccessFile.close(); fileChannel.close(); file = null; fileChannel = null; size = 0; mappedByteBuffer = null;
MappedByteBuffer读取大文件
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