使用示例：

import {
    
     fileDownload } from '@/utils/fileDownload'

fileDownload({
    
     url: process.env.VUE_APP_BASE_URL + `/statistic/pageList/export`, method: 'post', data: data })

工具类：

import store from '../store/index'
import {
    
    
    getAccessToken
} from '@/utils'
import axios from 'axios'
const token = store.getters.token || getAccessToken()
// 单个文件下载
export const fileDownload = (obj) => {
    
    
    let axiosParams = {
    
    
        method: obj.method,
        url: process.env.VUE_APP_apipath + obj.url,
        responseType: 'blob',
        headers: {
    
    
            'Authorization': `Bearer ${
      
      token}`
        }
    }
    if (obj.method && 'POST' === obj.method.toUpperCase()) {
    
    
        axiosParams.data = obj.data ? obj.data : {
    
    }
    }
    if (obj.method && 'GET' === obj.method.toUpperCase()) {
    
    
        axiosParams.params = obj.params ? obj.params : {
    
    }
    }
    return axios(axiosParams).then(res => {
    
    
        if (res && res.data) {
    
    
            const url = window.URL.createObjectURL(
                new Blob([res.data], {
    
    
                    type: 'application/octet-stream'
                })
            )
            if (obj.noLink) {
    
    
                return url
            }
            const link = document.createElement('a')
            link.style.display = 'none'
            link.href = url
            if (res.headers['content-disposition']) {
    
    
                console.log(decodeURI(
                    res.headers['content-disposition'].slice(
                        res.headers['content-disposition'].indexOf('=') + 1,
                        res.headers['content-disposition'].indexOf('.')
                    )
                ))
                link.download =
                    decodeURI(
                        res.headers['content-disposition'].slice(
                            res.headers['content-disposition'].indexOf('=') + 1,
                            res.headers['content-disposition'].indexOf('.')
                        )
                    ) +
                    res.headers['content-disposition'].slice(
                        res.headers['content-disposition'].indexOf('.')
                    )
            } else {
    
    
                if (obj.fileName) {
    
    
                    link.download = obj.fileName
                }
            }

            document.body.appendChild(link)
            link.click()
            window.URL.revokeObjectURL(url)
        }
    })
}

后端返回设置：

/**
 * excel内容类型
 */
private static final String CONTENT_TYPE_EXCEL = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

/**
 * 编码
 */
private static final String ENCODE = "UTF-8";

/**
 * Content-disposition
 */
private static final String CONTENT_DISPOSITION = "Content-disposition";

response.setContentType(CONTENT_TYPE_EXCEL);
response.setCharacterEncoding(ENCODE);
// 防止文件名的中文乱码
fileName = URLEncoder.encode(fileName, ENCODE).replaceAll("\\+", "%20");
response.setHeader(CONTENT_DISPOSITION, "attachment;filename=" + fileName + ".xlsx");