关于下载文件上传文件

<a-upload
            :customRequest="customRequest"
            :multiple="true"
            :showUploadList="false"
            name="file"
            v-if="hasPerm('sysFileInfo:upload')"
          >
            <a-button> <a-icon type="upload" />上传文件</a-button>
          </a-upload>

　　js

/**
       * 上传文件
       */
      customRequest (data) {
        const formData = new FormData()
        formData.append('file', data.file)
        sysFileInfoUpload(formData).then((res) => {
          if (res.success) {
            this.$message.success('上传成功')
            this.$refs.table.refresh()
          } else {
            this.$message.error('上传失败：' + res.message)
          }
        })
      },

　　

Blob转换

downloadfile (res) {
        var blob = new Blob([res.data], { type: 'application/octet-stream;charset=UTF-8' })
        var contentDisposition = res.headers['content-disposition']
        var patt = new RegExp('filename=([^;]+\\.[^\\.;]+);*')
        var result = patt.exec(contentDisposition)
        var filename = result[1]
        var downloadElement = document.createElement('a')
        var href = window.URL.createObjectURL(blob) // 创建下载的链接
        var reg = /^["](.*)["]$/g
        downloadElement.style.display = 'none'
        downloadElement.href = href
        downloadElement.download = decodeURI(filename.replace(reg, '$1')) // 下载后文件名
        document.body.appendChild(downloadElement)
        downloadElement.click() // 点击下载
        document.body.removeChild(downloadElement) // 下载完成移除元素
        window.URL.revokeObjectURL(href)
      },