如何将文件流转换成byte[]数组如何将文件流转换成byte[]数组

将文件流转换成byte[]数组
将文件转为byte[]，通过ByteArrayOutputStream实现

通过文件路径转换byte[]
将bitmap对象

将文件流转换成byte[]数组

InputStream is = new FileInputStream(new File("D://a.txt")); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); byte[] bytes = new byte[1024]; int temp; while ((temp = is.read(bytes)) != -1) {outputStream.write(bytes, 0, temp); }//转换后的byte[]byte[] finalBytes = outputStream.toByteArray();

将文件转为byte[]，通过ByteArrayOutputStream实现
通过文件路径转换byte[]
【如何将文件流转换成byte[]数组】通过ByteArrayOutputStream实现

/*** 将文件转为byte[]* @param filePath 文件路径* @return*/public static byte[] getBytes(String filePath){File file = new File(filePath); ByteArrayOutputStream out = null; try {FileInputStream in = new FileInputStream(file); out = new ByteArrayOutputStream(); byte[] b = new byte[1024]; int i = 0; while ((i = in.read(b)) != -1) {out.write(b, 0, b.length); }out.close(); in.close(); } catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace(); } catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace(); }byte[] s = out.toByteArray(); return s; }

将bitmap对象
转为byte[] 并进行Base64压缩

/*** bitmap转为base64* * @param bitmap* @return*/public static String bitmapToBase64(Bitmap bitmap) {String result = null; ByteArrayOutputStream baos = null; try {if (bitmap != null) {baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); baos.flush(); baos.close(); byte[] bitmapBytes = baos.toByteArray(); result = Base64.encodeToString(bitmapBytes, Base64.DEFAULT); }} catch (IOException e) {e.printStackTrace(); } finally {try {if (baos != null) {baos.flush(); baos.close(); }} catch (IOException e) {e.printStackTrace(); }}return result; }

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。