java io ---文件读取为byte数组

直接上代码

/**
  * 以字节为单位读取文件，常用于读二进制文件，如图片、声音、影像等文件。
  */
 public static byte[] readFileByBytes(String fileName) {
  InputStream in = null;
  ByteArrayOutputStream out = new ByteArrayOutputStream();
  try {
   in = new FileInputStream(fileName);
   byte[] buf = new byte[1024];
   int length = 0;
   while ((length = in.read(buf)) != -1) {
    out.write(buf, 0, length);
   }
  } catch (Exception e1) {
   e1.printStackTrace();
  } finally {
   if (in != null) {
    try {
     in.close();
    } catch (IOException e1) {
    }
   }
  }
  return out.toByteArray();
 }

java io ---文件读取为byte数组

原文：http://blog.csdn.net/smile0198/article/details/19015027