treert.github.io/char_code_tool/index.html at master · treert/treert.github.io · GitHub

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<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="initial-scale=1">
    <link rel="stylesheet" type="text/css" href="../global.css">
    <script src="../js/jquery.min.js"></script>
    <title>字符串编码转换小工具</title>
    <style>
        #m-input{
            height: 400px;
            width: 600px;
            font-size: 24px;
        }
    </style>
</head>
<body>

<div>
    <script>
        function keySend(){
            if(event.keyCode == 13 && event.ctrlKey){
                convertToUtf();
            }
        }

        function ConvertToUtf8String(code){
            if(code < 0x80){
                return String.fromCharCode(code);
            }
            var utf = code;
            var mask = -1<<6;
            var pad = 0x80;
            do{
                if(utf&mask){
                    utf = (utf&(~mask))|((utf&mask)<<2)|((~mask)+1)<<1;
                }else{
                    if(utf&pad){
                        pad |=pad>>1;
                        pad <<=8;
                    }
                    utf |= pad;
                    break;
                }
                mask<<=8;
                pad |=pad>>1;
                pad <<=8;
            }while(true);
            var out = [];
            for(var j = 24; j >=0 ; j-=8){
                var t = (utf>>j)&0xff;
                if(t){
                    out.push(t.toString(16).toUpperCase());
                }
            }
            return '\\x'+out.join('\\x');
        }

        function convertToUtf()
        {
            var val = $("#m-input").val();
            var out = [];
            for(var i = 0; i < val.length; i++){
                var code = val.charCodeAt(i);
                out.push(ConvertToUtf8String(code));
                continue;

                var utf = 0;
                if(code<0x80){
                    utf = code;

                }else{
                    utf = code;
                    var mask = -1<<6;
                    var pad = 0x80;
                    do{
                        if(utf&mask){
                            utf = (utf&(~mask))|((utf&mask)<<2)|((~mask)+1)<<1;
                        }else{
                            if(utf&pad){
                                pad |=pad>>1;
                                pad <<=8;
                            }
                            utf |= pad;
                            break;
                        }
                        mask<<=8;
                        pad |=pad>>1;
                        pad <<=8;
                    }while(true);
                }
                for(var j = 24; j >=0 ; j-=8){
                    var t = (utf>>j)&0xff;
                    if(t){
                        out.push(t.toString(16).toUpperCase());
                    }
                }
            }
            $("#m-before").html(val);
            $("#m-after").html(out.join(""));
        }
    </script>
    <textarea id="m-input" onkeydown="keySend();">输入要转换的字符串</textarea>
    <br/>
    <button onclick="convertToUtf();">转UTF-8</button>
    <h5>原文</h5>
    <p id="m-before"></p>
    <h5>转义字符串</h5>
    <pre id="m-after" style="outline: solid red 1px"></pre>
</div>


</body>
</html>