Element UI Upload上传

1、设置按钮，点击弹出文件上传对话框

        <el-button
          type="primary"
          icon="el-icon-upload2"
          @click="handleImport" 
          >
          文件上传
        </el-button>

2、上传文件对话框

    <el-dialog
      :title="upload.title"
      :visible.sync="upload.open"
      width="400px"
      append-to-body
    >
      <el-upload
        ref="upload"
        :limit="1"      
        accept=".xlsx, .xls"
        :headers="upload.headers"
        :action="upload.url"
        :disabled="upload.isUploading"
        :on-progress="handleFileUploadProgress"
        :on-success="handleFileSuccess"
        :auto-upload="false"
        :on-error="handleFileError"
        :before-upload="handleBeforeUpload"
        :on-change="handChange"
        :on-remove="handRemove"
        drag
      >
        <i class="el-icon-upload"></i>
        <div class="el-upload__text">
          将文件拖到此处，或
          <em>点击上传</em>
        </div>
        <div class="el-upload__tip text-center" slot="tip">
          <span>仅允许导入xls、xlsx格式文件。</span>
          <el-link
            type="primary"
            :underline="false"
            style="font-size: 12px; vertical-align: baseline"
            @click="importTemplate"
            >下载模板</el-link
          >
        </div>
      </el-upload>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitFileForm">确 定</el-button>
        <el-button @click="upload.open = false">取 消</el-button>
      </div>
    </el-dialog>

属性设置：官网地址组件 | Elementhttps://element.eleme.cn/#/zh-CN/component/upload

3、data

  data() {
    return {
      upload: {
        // 是否显示弹出层
        open: false,
        // 是否禁用上传
        isUploading: false,
        title: "",
        // 设置上传的请求头部
        headers:,
        // 上传的地址，自己设置
        url: , 
      },
     
    };
  },

 4、  methods方法

methods: {
    /** 导入按钮操作 */
    handleImport() {
      this.upload.title = "文件上传";
      this.upload.open = true;
    },

    //文件上传之前
    handleBeforeUpload(file) {
      // 限制文件上传大小
      const limit = file.size / 1024 / 1024 < 5;
      if (!limit ) {
        this.$message.error("上传文件大小不能超过 5MB!");
        this.upload.isUploading = false;
        return false;
      }
    },

    // 文件上传中处理
    handleFileUploadProgress(event, file, fileList) {
      this.upload.isUploading = true;
    },

    //文件上传错误
    handleFileError() {
      this.$message.error("文件上传失败");
      this.fullScreenLoading?.close();
    },

    //文件变化
    handChange(file, fileList) {
       console.log("文件改变")
    },

    //删除移除
    handRemove(file, fileList) {
       console.log("文件移除")
    },

    // 文件上传成功处理
    handleFileSuccess(response, file, fileList) {
      this.upload.open = false;
      this.upload.isUploading = false;
      this.$refs.upload.clearFiles();
      if (response.code == 200) {
         this.msgSuccess("上传成功"); 
    },

    // 提交上传文件
    submitFileForm() {
        this.$refs.upload.submit();
      }
    },
}

4、效果图

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