Java File to Byte Array getBytesFromFile(File file)

Description

get Bytes From File

License

Apache License

Declaration

public static byte[] getBytesFromFile(File file) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.*;

public class Main {

    public static byte[] getBytesFromFile(File file) {
        byte[] ret = null;
        try {/*from  w  w  w .  j av  a  2 s  . c  o m*/
            if (file == null) {
                // log.error("helper:the file is null!");
                return null;
            }
            FileInputStream in = new FileInputStream(file);
            ByteArrayOutputStream out = new ByteArrayOutputStream(4096);
            byte[] b = new byte[4096];
            int n;
            while ((n = in.read(b)) != -1) {
                out.write(b, 0, n);
            }
            in.close();
            out.close();
            ret = out.toByteArray();
        } catch (IOException e) {
            // log.error("helper:get bytes from file process error!");
            e.printStackTrace();
        }
        return ret;
    }
}

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