Read file as bytes in Java
Description
The following code shows how to read file as bytes.
Example
//w ww. j a va 2s . co m
// Ahy - A pure java CMS.
// Copyright (C) 2010 Sidney Leal (manish.com.br)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//package br.com.manish.ahy.fxadmin;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
public class Main {
public static byte[] readFileAsBytes(String path, Integer start, Integer length) {
byte[] byteData = null;
try {
File file = new File(path);
DataInputStream dis;
dis = new DataInputStream(new FileInputStream(file));
if (dis.available() > Integer.MAX_VALUE) {
System.out.println("dis.available() > Integer.MAX_VALUE");
}
ByteArrayOutputStream os = new ByteArrayOutputStream(length);
byte[] bytes = new byte[length];
dis.skipBytes(start);
int readBytes = dis.read(bytes, 0, length);
os.write(bytes, 0, readBytes);
byteData = os.toByteArray();
dis.close();
os.close();
} catch (Exception e) {
System.out.println(e);
}
return byteData;
}
}