上传文件

<el-upload class="upload-demo" action accept=".mp4" :show-file-list="true" :auto-upload="false" :on-change="fileChange" :file-list="fileList">

      <el-button slot="trigger" size="small" type="primary" class="white">选择文件</el-button>

      <el-button class="blue" @click="video_upload">上传</el-button>

</el-upload>

upload() {

      const formData = new FormData(); //定义一个空的文件

      formData.append("file", this.files);  //添加参数，this.files轼通过  fileChange() 事件获取；需要几个参数就formData.append("参数名", 参数)几次

      uploadVideo(formData).then((res) => {  //调上传接口

        if (res.data.retMsg == "成功") {

          this.fileList = [];

          this.$message.success("上传成功");

        } else {

          this.$message.error("上传失败");

        }

      });

    },