js xml转换成json

function xmlToJson(xml) {
    // 创建返回的对象
    let obj = {};

    if (xml.nodeType === 1) { // 元素节点
        // 处理属性
        if (xml.attributes.length > 0) {
            obj["@attributes"] = {};
            for (let j = 0; j < xml.attributes.length; j++) {
                let attribute = xml.attributes.item(j);
                obj["@attributes"][attribute.nodeName] = attribute.nodeValue;
            }
        }
    } else if (xml.nodeType === 3) { // 文本节点
        obj = xml.nodeValue.trim();
    }

    // 处理子节点
    if (xml.hasChildNodes()) {
        for (let i = 0; i < xml.childNodes.length; i++) {
            let item = xml.childNodes.item(i);
            let nodeName = item.nodeName;
            if (typeof obj[nodeName] === "undefined") {
                obj[nodeName] = xmlToJson(item);
            } else {
                if (typeof obj[nodeName].push === "undefined") {
                    let old = obj[nodeName];
                    obj[nodeName] = [];
                    obj[nodeName].push(old);
                }
                obj[nodeName].push(xmlToJson(item));
            }
        }
    }
    return obj;
}

// 使用示例
let xmlString = "<root><name>John</name><age>30</age><cars><car>Toyota</car><car>Honda</car></cars></root>";
let parser = new DOMParser();
let xml = parser.parseFromString(xmlString, "application/xml");
let json = xmlToJson(xml);
console.log(JSON.stringify(json, null, 2));

const xml2js = require('xml2js');

let xmlString = "<root><name>John</name><age>30</age><cars><car>Toyota</car><car>Honda</car></cars></root>";

xml2js.parseString(xmlString, {explicitArray: false}, (err, result) => {
    if (err) {
        console.error(err);
        return;
    }
    console.log(JSON.stringify(result, null, 2));
});