java中二进制和流的相互转换

流转二进制

  public static byte[] toByteArray(InputStream in) throws IOException {
         ByteArrayOutputStream out=new ByteArrayOutputStream();
         byte[] buffer=new byte[1024*4];
         int n=0;
         while ( (n=in.read(buffer)) !=-1) {
             out.write(buffer,0,n);
         }
         return out.toByteArray();
   }

二进制转流

 public static byte[] toInputStream(byte[] b) throws IOException {
    returnInputStream inputStream = new ByteArrayInputStream(b);
 }