vue中用H5实现文件上传的方法实例代码

 <img v-if="personInfo.photoUrl" :src="headPreFix + personInfo.photoUrl" style="height:126px;max-width:133px;margin: 25px 0;"> <img v-else src="../../assets/default.png" style="height:126px;max-width:133px;margin: 25px 0;">

<form id="form1" enctype="multipart/form-data" method="post" action="">        <div style="height:0px; overflow:hidden; position:absolute;">         <input type="file" tabIndex="-1" accept="image/jpeg,image/x-png,image/gif" name="file" style="padding-left:10px" id="fileToUpload" @change="fileSelected()"/>        </div>        <button type="button" class="btn btn-default btn-xs" onclick="document.getElementById('fileToUpload').click()">上传</button>        <button type="button" class="btn btn-default btn-xs" @click="deleteImg">删除</button>       </form>

// 上传图片  'fileSelected': function () {   var that = this   let files = document.getElementById('fileToUpload').files   if (files && files.length) {    var fd = new FormData()    fd.append('file', files[0])    var reader = new window.FileReader()    // 图片大小 100KB    var fileSize = 100 * 1024    reader.readAsDataURL(files[0])    reader.onload = function (e) {     if (e.target.result.length > fileSize) {      that.$dispatch('show-alert', 'msg_1016')      document.getElementById('fileToUpload').value = ''     } else {      var xhr = new XMLHttpRequest()      xhr.addEventListener('load', that.uploadComplete, false)      xhr.open('POST', that.$root.appBaseUrl + 'fileUpload/singleFileUpload')      xhr.send(fd)     }    }   }  },  // 上传成功  'uploadComplete': function (evt) {   this.personInfo.photoUrl = (evt.target.responseText).replace('//', '/')   document.getElementById('fileToUpload').value = ''  },  // 删除图片  'deleteImg': function () {   this.personInfo.photoUrl = ''  },

computed: {  headPreFix: function () {   let params = window.localdicts.dicts.ph_params.systemParam   if (params.storageType === 1) {    return params.storageUrl   }   return this.$root.appBaseUrl  }}