public static String readContent(String filename) throws IOException { FileChannel fc = null; try { fc = new RandomAccessFile(filename, "r").getChannel(); MappedByteBuffer byteBuffer = fc.map(MapMode.READ_ONLY, 0, fc.size()).load(); byte[] result = new byte[(int) fc.size()]; if (byteBuffer.remaining() > 0) { byteBuffer.get(result, 0, byteBuffer.remaining()); } String content = new String(result, CHARSET); return content; } catch (IOException e) { e.printStackTrace (); throw e; } finally { try { fc.close(); } catch (IOException e) { e.printStackTrace (); } } }
java fast read large file
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