JavaScript:根据UTF-8值创建字符串或char [英] JavaScript: create a string or char from an UTF-8 value

问题描述

与与此相同的问题，但是使用UTF-8而不是ASCII

Same question as this, but with UTF-8 instead of ASCII

在JavaScript中，如何获取UTF-8值的字符串表示形式?

In JavaScript, how can you get a string representation of a UTF-8 value?

例如如何将"c385"转换为Å"?

e.g. how to turn "c385" into "Å" ?

或如何将"E28093"转换为"—"(破折号)?

or how to turn "E28093" into "—" (m dash) ?

或如何将"E282AC"转换为€"(欧元符号)?

or how to turn "E282AC" into "€" (euro sign) ?

我的问题不是 Hex2Asc 的重复项>.您可以自己看到:hex2a("E282AC")会将字符串转换为â¬"，而不是将其转换为€"(欧元符号)！

My question is NOT a duplicate of Hex2Asc. You can see for yourself: hex2a("E282AC") will transform the string into "â¬" instead of transforming it into "€" (euro sign) !!

推荐答案

我认为这可以满足您的要求:

I think this will do what you want:

function convertHexToString(input) {

    // split input into groups of two
    var hex = input.match(/[\s\S]{2}/g) || [];
    var output = '';

    // build a hex-encoded representation of your string
    for (var i = 0, j = hex.length; i < j; i++) {
        output += '%' + ('0' + hex[i]).slice(-2);
    }

    // decode it using this trick
    output = decodeURIComponent(output);

    return output;
}

console.log("'" + convertHexToString('c385') + "'");   // => 'Å'
console.log("'" + convertHexToString('E28093') + "'"); // => '–'
console.log("'" + convertHexToString('E282AC') + "'"); // => '€'

演示

DEMO

积分:

• 将字符串拆分为段长n个字符
• 将整数数组转换为JavaScript字符串
  • https://stackoverflow.com/a/14028246/74757
  • Javascript elegant way to split string into segments n characters long
  • Convert integer array to string at javascript
    • https://stackoverflow.com/a/14028246/74757

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