vue 上传file文件

需要用到formData,然后单独使用axios，修改请求头为"multipart/form-data"

                var formData = new FormData()
                    formData.append('file1', data.file)
                    formData.append('file2', data.file)
                    axios({
                        url: 'url',
                        method: 'post',
                        headers: { "Content-Type": "multipart/form-data" },
                        data: formData
                    }).then(res => {
                        console.log(res
                    }).catch(err => {
                        console.log(err)
                    })