整理文档，搜刮出一个vue中用H5实现文件上传的方法实例代码，稍微整理精简一下做下分享。

1.图片上传

<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 }}

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