Java – Convert File to byte[]
This tutorial shows several ways to convert a File object to a byte[] array in Java. 1- Traditional way The traditional conversion way is through using read() method of InputStream as the following:
1 2 3 4 5 6 7 8 9 10 11 12 13 | public static byte[] convertUsingTraditionalWay(File file) { byte[] fileBytes = new byte[(int) file.length()]; try(FileInputStream inputStream = new FileInputStream(file)) { inputStream.read(fileBytes); } catch (Exception ex) { ex.printStackTrace(); } return fileBytes; } |
2- Java NIO With Java 7, you can do the conversion using Files utility class of nio package:
1 2 3 4 5 6 7 8 9 10 11 12 13 | public static byte[] convertUsingJavaNIO(File file) { byte[] fileBytes = null; try { fileBytes = Files.readAllBytes(file.toPath()); } catch (Exception ex) { ex.printStackTrace(); } return fileBytes; } |
3- Apache Commons IO Besides JDK, you can...