Java File to Byte Array getBytes(File file)

Description

get Bytes

License

Apache License

Declaration

public static byte[] getBytes(File file) throws IOException 

Method Source Code

//package com.java2s;
/*//from  w ww .  ja v a  2 s .co  m
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.*;

import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Main {
    public static byte[] getBytes(ZipFile archive, ZipEntry entry) throws IOException {
        try (InputStream stream = archive.getInputStream(entry)) {
            return readBytes(stream, (int) entry.getSize());
        }
    }

    public static byte[] getBytes(File file) throws IOException {
        try (FileInputStream stream = new FileInputStream(file)) {
            return readBytes(stream, (int) file.length());
        }
    }

    public static byte[] readBytes(InputStream stream, int length) throws IOException {
        byte[] bytes = new byte[length];

        int n = 0, off = 0;
        while (n < length) {
            int count = stream.read(bytes, off + n, length - n);
            if (count < 0) {
                throw new IOException("premature end of stream");
            }
            n += count;
        }

        return bytes;
    }
}

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2. getBytes(File f)
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8. getBytes(File file)
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