使用axios请求时,发送formData请求的示例

var formData = new FormData();
formData.append("username", "Groucho");
formData.append("aountnum", 123456);
fetch('/users', {
 method: 'POST',
 body: formData
})

let userObj = {userName: 'xxx', age: '21'}
formData.append('user', userObj)

let param {{name:"张三"},{aa:"222"}}<br>let formData = new FormData(); <br>Object.keys(param).forEach(key => { <br>　　formData.append(key, param[key]); <br>});