获取的任何文件的二进制值 [英] Get binary value of any file

问题描述

如果假设我有一个文件，如的music.mp3 或 image.jpg的或任何文件时要考虑。我如何获得这些文件的二进制重新presentation Java中的字符串值，这样我可以查看它？

If suppose I have a file such as music.mp3 or image.jpg or any file to be considered. How do i get the binary representation of those files to a string value in java so that i can view it ??

例如：假设我有文件名为'vid​​eo.mp4 则必须重新presented为 101011010101000111010 或内存类似的东西，我需要获得的价值，并将其存储在字符串如一个String =101011010101000111010

Eg: Suppose I have file called 'video.mp4' then it must be represented as 101011010101000111010 or something like that in memory i need to get the value and store it in String like String s = "101011010101000111010"

有没有人对如何做到这一点在Java中？任何想法

Does anyone have any idea on how to do this in java ??

编辑2
我怎样才能将字符串转换回实际文件??

EDIT 2 How can i convert back the string to the actual file ??

推荐答案

我建议十六进制，它更加紧凑和可读性

I would suggest hexadecimal, it's much more compact and readable

    StringBuilder sb = new StringBuilder();
    try (BufferedInputStream is = new BufferedInputStream(new FileInputStream("1.txt"))) {
        for (int b; (b = is.read()) != -1;) {
            String s = Integer.toHexString(b).toUpperCase();
            if (s.length() == 1) {
                sb.append('0');
            }
            sb.append(s).append(' ');
        }
    }
    System.out.println(sb);

输出

71 77 65 77 65 72 0D 0A 71 77 72 65 0D 0A 72 77 65 72 0D 0A 

有关二进制字符串改变code

for binary string change the code

            String s = "0000000" + Integer.toBinaryString(b);
            s = s.substring(s.length() - 8); 
            sb.append(s).append(' ');

和得到这个输出

01110001 01110111 01100101 01110111 01100101 01110010 00001101 00001010 

这是如何解析字符串和写回文件

and this is how to parse the string and write back to a file

    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("2.txt"));
    Scanner sc = new Scanner(s);
    while (sc.hasNextInt()) {
        int b = sc.nextInt(2);
        out.write(b);
    }
    out.close();

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