let form = new FormData();
        // 后端接受参数 ，可以接受多个参数
        form.append("submittime",date1)
        form.append("file",this.file)
        form.append("planId",this.uploadId)
        form.append("pmId",this.$globalData.pmId)
        // console.log(this.file,"这是上传的文件")
        const loading = this.$loading({
          lock: true,
          text: '正在上传请稍后',
          spinner: 'el-icon-loading',
          background: 'rgba(0, 0, 0, 0.7)'
        });
        addPdf(form).then(res=>{
          loading.close();
          console.log(res)
          console.log("这是上传成功的东西")
          this.$message({
            type: 'success',
            message: "上传成功"
          }) 
            this.selectGenerate()
            this.listVisible=false
            this.fileList=[]
          }).catch(err=>{
            console.log(err)
            loading.close();
          })

  <!-- 上传文件form -->
            <form
              enctype="multipart/form-data"
              method="post"
              id="uploadForm"
            >
              <a
                href="javascript:;"
                class="file"
              >选择文件
                <label class="file-upload">
                  <input
                    class="drawUI-button"
                    type="file"
                    name="file"
                    id="inFile"
                    accept="application/zip"
                    @change="handleChange"
                  />
                </label>
              </a>
            </form>

 handleChange(e) {
      this.uploadFile = e.target.files[0];
     console.log(e.target.files[0], "这是上传的文件");
      // this.$emit("drawMap", document.getElementById("uploadForm"));
     //有些地方（api）要的是 form 的节点 
}