vue 文件上传

vue 文件上传

• 首先 先说一下想要实现的效果
  
  就如截图所见，需要将企业和需要上传的文件提交到后台处理，那么接下来就说如何实现

• vue 实现
  vue 页面代码

  <el-upload
        class="upload-demo"
        ref="upload"
        action="doUpload"
        :limit="1"
        :file-list="fileList"
        :before-upload="beforeUpload">
        <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
        <a href="./static/moban.xlsx" download="模板"><el-button size="small" type="success">下载模板</el-button></a>
        <!-- <el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button> -->
        <div slot="tip" class="el-upload__tip">只能上传excel文件，且不超过5MB</div>
        <div slot="tip" class="el-upload-list__item-name">{{fileName}}</div>
  </el-upload> 
    <span slot="footer" class="dialog-footer">
      <el-button @click="visible = false">取消</el-button>
      <el-button type="primary" @click="submitUpload()">确定</el-button>
    </span>

 data () {
      return {
        files:"",
        fileName: '',
        fileList: []
      }
    },

上传之前的大小校验

beforeUpload(file){
        debugger
        console.log(file,'文件');
        this.files = file;
        const extension = file.name.split('.')[1] === 'xls'
        const extension2 = file.name.split('.')[1] === 'xlsx'
        const isLt2M = file.size / 1024 / 1024 < 5
        if (!extension && !extension2) {
          this.$message.warning('上传模板只能是 xls、xlsx格式!')
          return
        }
        if (!isLt2M) {
          this.$message.warning('上传模板大小不能超过 5MB!')
          return
        }
        this.fileName = file.name;
        return false // 返回false不会自动上传
      },

手动上传确认提交

submitUpload() {
        debugger
        console.log('上传'+this.files.name)
        if(this.fileName == ""){
          this.$message.warning('请选择要上传的文件！')
          return false
        }
        let fileFormData = new FormData();
        fileFormData.append('file', this.files, this.fileName);//filename是键，file是值，就是要传的文件，test.zip是要传的文件名
        let requestConfig = {
          headers: {
            'Content-Type': 'multipart/form-data'
          },
        }
        this.$http.post(`/basedata/oesmembers/upload?companyId=`+this.company, fileFormData, requestConfig).then((res) => {
            debugger
            if (data && data.code === 0) {
            this.$message({
              message: '操作成功',
              type: 'success',
              duration: 1500,
              onClose: () => {
                this.visible = false
                this.$emit('refreshDataList')
              }
            })
          } else {
            this.$message.error(data.msg)
          }
        })  
      }

• 后台

    /**
     * 上传文件
     */
    @PostMapping("/upload")
    @RequiresPermissions("basedata:oesmembers:upload")
    public R upload(@RequestParam("file") MultipartFile file, @RequestParam("companyId") Integer companyId) {
        System.out.println(companyId);
        if (file.isEmpty()) {
            throw new RRException("上传文件不能为空");
        }
        //上传文件 相关逻辑

        return R.ok();
    }