在javascript中将十六进制转换为二进制 [英] convert hex to binary in javascript

问题描述

我需要使用javascript将十六进制转换为二进制.

I need to convert hex into binary using javascript.

示例:21 23 00 6A D0 0F 69 4C E1 20

example: 21 23 00 6A D0 0F 69 4C E1 20

应导致:0010000100100011000000000110101011010000000011110110100101001100

should result in: ‭0010000100100011000000000110101011010000000011110110100101001100‬

有人知道我可能会使用的JavaScript库吗?

Does anyone know of a javascript library I might use to accomplish this?

Harriet

推荐答案

您可以创建一个将十六进制数转换为二进制的函数，如下所示:

You can create a function converting a hex number to binary with something like this :

function hex2bin(hex){
    return ("00000000" + (parseInt(hex, 16)).toString(2)).substr(-8);
}

对于格式设置，您只需将8 0 填充为字符串，然后连接数字.然后，要进行转换，您要做的基本上是获取一个字符串或数字，将 parseInt 函数与输入数字值及其基数(此处为16的十六进制数)一起使用，然后将其打印为基数2使用 toString 函数.最后，您提取最后8个字符以获取格式化的字符串.

For formatting you just fill a string with 8 0, and you concatenate your number. Then, for converting, what you do is basicaly getting a string or number, use the parseInt function with the input number value and its base (base 16 for hex here), then you print it to base 2 with the toString function. And finally, you extract the last 8 characters to get your formatted string.

由于此答案仍在阅读中，我想使用ES8(ECMAScript 2017)为该函数的主体提供另一种语法

As this answer is still being read, I wanted to provide another syntax for the function's body, using the ES8 (ECMAScript 2017) String.padStart() method :

function hex2bin(hex){
    return (parseInt(hex, 16).toString(2)).padStart(8, '0');
}

使用 padStart 将填充字符串，直到其长度与第一个参数匹配，第二个参数为填充符(默认为空白).

Using padStart will fill the string until its lengths matches the first parameter, and the second parameter is the filler character (blank space by default).

编辑结束

要在像您这样的完整字符串上使用此字符串，请使用简单的 forEach :

To use this on a full string like yours, use a simple forEach :

var result = ""
"21 23 00 6A D0 0F 69 4C E1 20".split(" ").forEach(str => {
  result += hex2bin(str)
})
console.log(result)

输出将是:

00100001001000110000000001101010110100000000111101101001010011001110000100100000

00100001001000110000000001101010110100000000111101101001010011001110000100100000

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