主要是用到x2这个库

 <script src="https://cdnjs.cloudflare.com/ajax/libs/x2js/1.2.0/xml2json.js"></script>
    <script>
        let x2js = new X2JS();
        let root = {

            name: 'zhangsan',
            age: 18,
            address: {
                city: 'beijing',
                street: 'xxx'
            }
        }
        let xml= x2js.json2xml({root})
        console.log(xml)
    </script>