js 对象 xml序列化

function serializeToXML(obj) {
    let xml = '';

    for (let prop in obj) {
        if (obj.hasOwnProperty(prop)) {
            xml += `<${prop}>${serializeToXML(obj[prop])}</${prop}>`;
        }
    }

    return xml ? xml : obj;
}

// 示例对象
const obj = {
    name: "John",
    age: 30,
    address: {
        city: "New York",
        zip: "10001"
    }
};

// 序列化为XML
const xmlString = `<?xml version="1.0" encoding="UTF-8"?><person>${serializeToXML(obj)}</person>`;
console.log(xmlString);

function serializeToXML(obj, visited = new Set()) {
    if (typeof obj !== 'object' || obj === null) {
        return obj;
    }

    if (visited.has(obj)) {
        return ''; // 或者其他处理方式，如：<reference id="..."/>
    }

    visited.add(obj);
    let xml = '';

    for (let prop in obj) {
        if (obj.hasOwnProperty(prop)) {
            xml += `<${prop}>${serializeToXML(obj[prop], visited)}</${prop}>`;
        }
    }

    visited.delete(obj);
    return xml;
}

function escapeXML(str) {
    return str.replace(/&/g, '&')
              .replace(/</g, '&lt;')
              .replace(/>/g, '&gt;')
              .replace(/"/g, '&quot;')
              .replace(/'/g, '&apos;');
}

function serializeToXML(obj, visited = new Set()) {
    if (typeof obj !== 'object' || obj === null) {
        return escapeXML(obj);
    }

    // ...（其他代码保持不变）
}

const { create } = require('xmlbuilder2');

const obj = {
    name: "John",
    age: 30,
    address: {
        city: "New York",
        zip: "10001"
    }
};

const xml = create(obj).end({ prettyPrint: true });
console.log(xml);