首先在请求里加上responseType: 'blob'

http({url: '',method: 'post',headers: {'Content-Type': 'application/json'},responseType: 'blob',data: saveObj
})

然后再返参里下载

http({url: '',method: 'post',headers: {'Content-Type': 'application/json'},responseType: 'blob',data: saveObj}).then(res => {const currentDate = new Date()const year = currentDate.getFullYear()const month = currentDate.getMonth() + 1const day = currentDate.getDate()const formattedDate = `${fileName}导入数据${year}_${month}_${day}`const blob = new Blob([res])// 开始下载const elink = document.createElement('a')elink.download = `${formattedDate}.xlsx`elink.style.display = 'none'elink.href = URL.createObjectURL(blob)document.body.appendChild(elink)elink.click()URL.revokeObjectURL(elink.href) // 释放URL 对象document.body.removeChild(elink)})