1、JSON解析为XML

function parseJSONToXML(json) {let xmlDoc = document.implementation.createDocument(null, '');function parseValue(value, parentElement) {if (Array.isArray(value)) {for (let item of value) {let arrayElement = xmlDoc.createElement(parentElement.tagName);parseValue(item, arrayElement);if (parentElement) {parentElement.appendChild(arrayElement);}}} else if (typeof value === 'object') {parseObject(value, parentElement);} else {parentElement.textContent = value;}}function parseObject(obj, parentElement) {for (let key in obj) {if (obj.hasOwnProperty(key)) {let value = obj[key];let element = xmlDoc.createElement(key);parseValue(value, element);if (parentElement) {parentElement.appendChild(element);} else {xmlDoc.appendChild(element);}}}}parseObject(json, null);let serializer = new XMLSerializer();return '<?xml version="1.0" encoding="UTF-8"?>' + serializer.serializeToString(xmlDoc);
}// 使用示例
let json = {root: {name: 'John',age: 30,addresses: [{ street: 'Main St', city: 'City1' },{ street: 'Second St', city: 'City2' }]}
};let xmlString = parseJSONToXML(json);
console.log(xmlString);

2、XML解析为JSON

function parseXMLToJSON(xml) {let parser = new DOMParser();let xmlDoc = parser.parseFromString(xml, 'text/xml');function parseElement(element) {let obj = {};if (element.hasChildNodes()) {let nestedElements = Array.from(element.children);if (nestedElements.length > 0) {nestedElements.forEach((nestedElement) => {let key = nestedElement.tagName;let value = parseElement(nestedElement);if (obj.hasOwnProperty(key)) {if (!Array.isArray(obj[key])) {obj[key] = [obj[key]];}obj[key].push(value);} else {obj[key] = value;}});} else {obj = element.textContent;}}return obj;}let rootNode = xmlDoc.documentElement;let json = {};let rootElement = parseElement(rootNode);json[rootNode.tagName] = rootElement;return JSON.stringify(json);
}// 使用示例
let xmlString = '<?xml version="1.0" encoding="UTF-8"?><root><name>John</name><age>30</age><addresses><street>Main St</street><city>City1</city></addresses><addresses><street>Second St</street><city>City2</city></addresses></root>';let json = parseXMLToJSON(xmlString);
console.log(json);