格式化xml

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>


</body>

</html>
<script>

    //var jsonObj = JSON.parse(后端返回的json字符串);
    //var result = JSON.stringify(jsonObj, null, 2);//格式化

    String.prototype.removeLineEnd = function () {
        return this.replace(/(<.+?\s+?)(?:\n\s*?(.+?=".*?"))/g, '$1 $2');
    }

    function formatXml(text) {
        //去掉多余的空格
        text = '\n' + text.replace(/(<\w+)(\s.*?>)/g,
            function ($0, name, props) {
                return name + ' ' + props.replace(/\s+(\w+=)/g, " $1");
            }).replace(/>\s*?</g, ">\n<");

        //把注释编码
        text = text.replace(/\n/g, '\r').replace(/<!--(.+?)-->/g,
            function ($0, text) {
                var ret = '<!--' + escape(text) + '-->';
                return ret;
            }).replace(/\r/g, '\n');

        //调整格式
        var rgx = /\n(<(([^\?]).+?)(?:\s|\s*?>|\s*?(\/)>)(?:.*?(?:(?:(\/)>)|(?:<(\/)\2>)))?)/mg;
        var nodeStack = [];
        var output = text.replace(rgx, function ($0, all, name, isBegin, isCloseFull1, isCloseFull2, isFull1, isFull2) {
            var isClosed = (isCloseFull1 == '/') || (isCloseFull2 == '/') || (isFull1 == '/') || (isFull2 == '/');
            var prefix = '';
            if (isBegin == '!') {
                prefix = getPrefix(nodeStack.length);
            } else {
                if (isBegin != '/') {
                    prefix = getPrefix(nodeStack.length);
                    if (!isClosed) {
                        nodeStack.push(name);
                    }
                } else {
                    nodeStack.pop();
                    prefix = getPrefix(nodeStack.length);
                }
            }
            var ret = '\n' + prefix + all;
            return ret;
        });

        var prefixSpace = -1;
        var outputText = output.substring(1);

        //把注释还原并解码，调格式
        outputText = outputText.replace(/\n/g, '\r').replace(/(\s*)<!--(.+?)-->/g,
            function ($0, prefix, text) {
                if (prefix.charAt(0) == '\r') prefix = prefix.substring(1);
                text = unescape(text).replace(/\r/g, '\n');
                var ret = '\n' + prefix + '<!--' + text.replace(/^\s*/mg, prefix) + '-->';
                return ret;
            });
        return outputText.replace(/\s+$/g, '').replace(/\r/g, '\r\n');
    }

    function getPrefix(prefixIndex) {
        var span = '    ';
        var output = [];
        for (var i = 0; i < prefixIndex; ++i) {
            output.push(span);
        }
        return output.join('');
    }

    // 2) 、调用方法进行格式化
    var result = formatXml("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<InterfaceFile><statues></statues></InterfaceFile>");
  console.log(result)

</script>
格式化xml

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