对于node.js和使用https://github.com/feross/buffer的浏览器

function ab2str(buf: Uint8Array) {
  return Buffer.from(buf).toString('base64');
}
function str2ab(str: string) {
  return new Uint8Array(Buffer.from(str, 'base64'))
}

注意:这里的解决方案对我不起作用。我需要支持node.js和浏览器，只是序列化UInt8Array到一个字符串。我可以将它序列化为一个数字[]，但这会占用不必要的空间。有了这个解决方案，我不需要担心编码，因为它是base64。以防其他人也有同样的问题……我的意见

基于gengkev的回答，我创建了两种方法的函数，因为BlobBuilder可以处理String和ArrayBuffer:

function string2ArrayBuffer(string, callback) {
    var bb = new BlobBuilder();
    bb.append(string);
    var f = new FileReader();
    f.onload = function(e) {
        callback(e.target.result);
    }
    f.readAsArrayBuffer(bb.getBlob());
}

and

function arrayBuffer2String(buf, callback) {
    var bb = new BlobBuilder();
    bb.append(buf);
    var f = new FileReader();
    f.onload = function(e) {
        callback(e.target.result)
    }
    f.readAsText(bb.getBlob());
}

一个简单的测试:

string2ArrayBuffer("abc",
    function (buf) {
        var uInt8 = new Uint8Array(buf);
        console.log(uInt8); // Returns `Uint8Array { 0=97, 1=98, 2=99}`

        arrayBuffer2String(buf, 
            function (string) {
                console.log(string); // returns "abc"
            }
        )
    }
)

我发现这种方法有问题，主要是因为我试图将输出写入一个文件，而它没有正确编码。由于JS似乎使用UCS-2编码(源，源)，我们需要进一步扩展这个解决方案，这是我的增强解决方案，对我来说是有效的。

我对一般文本没有任何困难，但当它变成阿拉伯语或韩语时，输出文件没有所有字符，而是显示错误字符

文件输出: ”、“单位”:“10 K”:“O©iuY喜爱”、“遵循% % {screen_name} {screen_name}”:“U”“O©iu“推特:“¤问题”、“推%{标签}”:“%{标签}’一个¤uEY喜爱”,“推特%{名称}”:“%{名称}U”xA¤uEY喜爱”},柯:{“% {followers_count}的追随者”:“% {followers_count}…X \”,“100 K +”:“100我助教”,“10 K单位”:“我e”,遵循:“\°”,“跟着% {screen_name}”:“% {screen_name}Ø\°X0”,凯西:“œ”,男:“我”,推特:“¸”,“推特%{标签}”:“%{标签}

original: ", " 10 k unit ": "万",follow: "关注"," follow百分之百分之;screen _ name} ": " {screen _ name}先生圆场,tweet: "推特"," tweet百分之百分之{hashtag} ": " {hashtag},推特的"," tweet to百分之百分之{name} ": " {name}先生推到百分之":{},ko " {followers _ count}百分之followers ": " {followers _ count}명의팔로워100 k + ": " 100 ", "만이상"," 10 k unit ": "만단위",follow: "팔로우"," follow百分之百分之{screen _ name} ": " {screen _ name}님팔로우하기",k: "천",米:"백만",tweet: "트윗"," tweet百分之百分之{hashtag} ": " {hashtag}

我从dennis的解决方案和我发现的这个帖子中获取了信息。

这是我的代码:

function encode_utf8(s) {
  return unescape(encodeURIComponent(s));
}

function decode_utf8(s) {
  return decodeURIComponent(escape(s));
}

 function ab2str(buf) {
   var s = String.fromCharCode.apply(null, new Uint8Array(buf));
   return decode_utf8(decode_utf8(s))
 }

function str2ab(str) {
   var s = encode_utf8(str)
   var buf = new ArrayBuffer(s.length); 
   var bufView = new Uint8Array(buf);
   for (var i=0, strLen=s.length; i<strLen; i++) {
     bufView[i] = s.charCodeAt(i);
   }
   return bufView;
 }

这允许我将内容保存到一个文件，而没有编码问题。

How it works: It basically takes the single 8-byte chunks composing a UTF-8 character and saves them as single characters (therefore an UTF-8 character built in this way, could be composed by 1-4 of these characters). UTF-8 encodes characters in a format that variates from 1 to 4 bytes in length. What we do here is encoding the sting in an URI component and then take this component and translate it in the corresponding 8 byte character. In this way we don't lose the information given by UTF8 characters that are more than 1 byte long.

好吧，这里有一种有点复杂的方式来做同样的事情:

var string = "Blah blah blah", output;
var bb = new (window.BlobBuilder||window.WebKitBlobBuilder||window.MozBlobBuilder)();
bb.append(string);
var f = new FileReader();
f.onload = function(e) {
  // do whatever
  output = e.target.result;
}
f.readAsArrayBuffer(bb.getBlob());

编辑:BlobBuilder早已被弃用，取而代之的是Blob构造函数，在我第一次写这篇文章时，它还不存在。这是一个更新版本。(是的，这一直是一个非常愚蠢的转换方式，但它只是为了好玩!)

var string = "Blah blah blah", output;
var f = new FileReader();
f.onload = function(e) {
  // do whatever
  output = e.target.result;
};
f.readAsArrayBuffer(new Blob([string]));

  stringToArrayBuffer(byteString) {
    var byteArray = new Uint8Array(byteString.length);
    for (var i = 0; i < byteString.length; i++) {
      byteArray[i] = byteString.codePointAt(i);
    }
    return byteArray;
  }
  arrayBufferToString(buffer) {
    var byteArray = new Uint8Array(buffer);
    var byteString = '';
    for (var i = 0; i < byteArray.byteLength; i++) {
      byteString += String.fromCodePoint(byteArray[i]);
    }
    return byteString;
  }

var decoder = new TextDecoder ();
var string = decoder.decode (arrayBuffer);

参见https://developer.mozilla.org/en-US/docs/Web/API/TextDecoder/decode