将XML文件转换为JSON

function xmlToJSON(xml) {
    var obj = {};
    
    if (xml.nodeType === 1) {
        if (xml.attributes.length > 0) {
            obj["@attributes"] = {};
            
            for (var i = 0; i < xml.attributes.length; i++) {
                var attribute = xml.attributes[i];
                obj["@attributes"][attribute.nodeName] = attribute.nodeValue;
            }
        }
    } else if (xml.nodeType === 3) {
        obj = xml.nodeValue;
    }
    
    if (xml.hasChildNodes()) {
        for (var j = 0; j < xml.childNodes.length; j++) {
            var child = xml.childNodes[j];
            var nodeName = child.nodeName;
            
            if (typeof(obj[nodeName]) === "undefined") {
                obj[nodeName] = xmlToJSON(child);
            } else {
                if (typeof(obj[nodeName].push) === "undefined") {
                    var oldObj = obj[nodeName];
                    obj[nodeName] = [];
                    obj[nodeName].push(oldObj);
                }
                
                obj[nodeName].push(xmlToJSON(child));
            }
        }
    }
    
    return obj;
}

// 使用示例
var xmlString = '<root><name>John Doe</name><age>30</age></root>';
var parser = new DOMParser();
var xmlDoc = parser.parseFromString(xmlString, "text/xml");
var json = xmlToJSON(xmlDoc);
console.log(json);