vue
调用事件createInputFile(id可删,url服务器路径)

createInputFile(id, url) {
      const file = document.createElement('input')
      file.name = 'fileName'
      file.type = 'file'
      file.accept =
        'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'//xlsx文件，可改
      file.click()
      file.addEventListener('change', this.submitFile(id, url))
    },
    submitFile(id, url) {
      return (event) => {
        console.log(id, url)
        let formdata = new FormData()
        formdata.append('file', event.target.files[0])
        console.log(event.target.files[0])
        // console.log(formdata.get('file'))
        //将formdata作为函数体上传到url，请求方式post照常
      }
    },