element-ui upload组件多文件上传的示例代码

<el-form ref="newform" :model="newform" :rules="rules">    <el-form-item prop="expName" label="">     <el-input v-model="newform.expName" placeholder="" style="width:75%">     </el-input>    </el-form-item>    <el-form-item prop="expSn" label="">     <el-input v-model="newform.expSn" placeholder="" style="width:75%">     </el-input>    </el-form-item>    <el-form-item label='' prop="groupName">     <el-select v-model="newform.groupName" placeholder="" style="width:75%" @change="newSelectGroup($event)">      <el-option      v-for="item in groupOptions"      :key="item.groupId"      :label="item.groupName"      :value="item.groupId">      </el-option>     </el-select>    </el-form-item>    <el-form-item label="" prop="subGroupName">     <el-select v-model="newform.subGroupName" placeholder="" style="width:75%" @change="newSelectSubGroup($event)">      <el-option      v-for="item in subGroupOptions"      :key="item.subGroupId"      :label="item.subGroupName"      :value="item.subGroupId">      </el-option>     </el-select>    </el-form-item>    <el-form-item label="" prop="expvmDifficulty">     <el-rate v-model="newform.expvmDifficulty" :max="5" style="line-height: 2;"></el-rate>    </el-form-item>    <el-form-item label="" prop="expvmInstruction">     <el-upload      class="upload-demo"      drag      ref="uploadhtml"      :action="upload_url"      :auto-upload="false"      :before-upload="newHtml"      accept=".html, .htm">      <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>      <div slot="tip" class="el-upload__tip">实验信息上传，只能传(.html/.htm)文件</div>     </el-upload>    </el-form-item>    <el-form-item label="" prop="expvmFiles">     <el-upload      class="upload-demo"      drag      ref="uploadfile"      :action="upload_url"      :auto-upload="false"      :before-upload="newFiles"      multiple>      <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>      <div slot="tip" class="el-upload__tip">实验信息附件上传，只能传(.file)文件</div>     </el-upload>    </el-form-item>    <el-form-item label="" prop="expvmVideo">     <el-upload      class="upload-demo"      drag      ref="uploadvideo"      :action="upload_url"      :auto-upload="false"      :before-upload="newVideo"      accept=".mp4">      <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>      <div slot="tip" class="el-upload__tip">实验视频上传，只能传(.mp4)文件</div>     </el-upload>    </el-form-item>    <el-form-item style="text-align:center">     <el-button type="primary" @click="newSubmitForm()" class="yes-btn">     确 定     </el-button>     <el-button @click="resetForm('newform')">     重 置     </el-button>    </el-form-item>   </el-form>

data () {  return {　　　 upload_url: 'aaa',    // 随便填一个，但一定要有　　  uploadForm: new FormData(),  // 一个formdata   rules: {},   // 用到的规则   newform: {    expName: '',    groupName: '',    expSn: '',    subGroupName: '',    expvmDifficulty: 1   }  } }

newSubmitForm () {   this.$refs['newform'].validate((valid) => {    if (valid) {     this.uploadForm.append('expName', this.newform.expName)     this.uploadForm.append('expSn', this.newform.expSn)     this.uploadForm.append('groupId', this.newgroupId)     this.uploadForm.append('subGroupId', this.newsubgroupId)     this.uploadForm.append('expvmDifficulty', this.newform.expvmDifficulty)          newExp(this.uploadForm).then(res => {      if (res.code === 400) {       this.$message.error(res.error)      } else if (res.code === 200) {       this.$message.success('上传成功！')            }     })     this.$refs.uploadhtml.submit()  // 提交时触发了before-upload函数     this.$refs.uploadfile.submit()     this.$refs.uploadvideo.submit()         } else {     console.log('error submit!!')     return false    }   })  },  newHtml (file) {  // before-upload   this.uploadForm.append('html', file)   return false  },  newFiles (file) {   this.uploadForm.append('file[]', file)   return false  },  newVideo (file) {   this.uploadForm.append('video', file)   return false  }newExp函数是作为一个前后端交互的函数export function newExp (data) { return axios({  method: 'post', // 方式一定是post  url: '你的后台接收函数路径',  timeout: 20000,  data: data    // 参数需要是单一的formData形式 })}

public function newExp() {   $param = $this->request->post();     // 获取页面表单传值   $files = $this->request->file();     // 接收到的文件 }

this.uploadForm.append('file[]', file)