文件上传和下载

上传实现流程

1、 el-upload

<el-upload
ref="upload"
:limit="1"
accept=".jpg, .png"
:action="upload.url"
:headers="upload.headers"
:file-list="upload.fileList"
:on-progress="handleFileUploadProgress"
:on-success="handleFileSuccess"
:auto-upload="false">
<el-button slot="trigger" size="small" type="primary">选取文件</el-button>
<el-button style="margin-left: 10px;" size="small" type="success" :loading="upload.isUploading" @click="submitUpload">上传到服务器</el-button>
<div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
</el-upload>

2、data 中添加属性

// 上传参数
upload: {
  // 是否禁用上传
  isUploading: false,
  // 设置上传的请求头部
  headers: { Authorization: "Bearer " + token },
  // 上传的地址
  url: process.env.VUE_APP_BASE_API + "/common/upload",
  // 上传的文件列表
  fileList: []
},

3、添加对应事件

// 文件提交处理
submitUpload() {
  this.$refs.upload.submit();
},
// 文件上传中处理
handleFileUploadProgress(event, file, fileList) {
  this.upload.isUploading = true;
},
// 文件上传成功处理
handleFileSuccess(response, file, fileList) {
  this.upload.isUploading = false;
  this.form.filePath = response.url;
  this.msgSuccess(response.msg);
}

下载实现流程

1、添加对应按钮和事件

<el-button
  size="mini"
  type="text"
  icon="el-icon-edit"
  @click="handleDownload(scope.row)"
>下载</el-button>

2、实现文件下载

// 文件下载处理
    handleDownload(row) {
      var name = row.fileName;
      var url = row.filePath;
      var suffix = url.substring(url.lastIndexOf("."), url.length);
      const a = document.createElement('a')
      a.setAttribute('download', name + suffix)
      a.setAttribute('target', '_blank')
      a.setAttribute('href', url)
      a.click()
    }