uni-app 拍照或从相册上传图片

后台使用的是Java SSM框架

<template><view><view class="cu-bar bg-white margin-top"><view class="action">图片上传</view><view class="action">{
   {imgList.length}}/{
   {imgMaxNum}}</view></view><view class="cu-form-group"><view class="grid col-4 grid-square flex-sub"><view class="bg-img" v-for="(item,index) in imgList" :key="index" @tap="ViewImage" :data-url="imgList[index]"><image :src="imgList[index]" mode="aspectFill"></image><view class="cu-tag bg-red" @tap.stop="DelImg" :data-index="index"><text class='cuIcon-close'></text></view></view><view class="solids" @tap="ChooseImage" v-if="imgList.length<4"><text class='cuIcon-cameraadd'></text></view></view></view><view class="cu-form-group upload-btn"><button class="cu-btn block bg-blue margin-tb-sm lg">上传</button></view></view>
</template>

var _this = this;
export default {data() {return {imgList: [],imgMaxNum: 4}},onLoad() {},methods: {ChooseImage() {_this = this;uni.chooseImage({count: 4, //默认9sizeType: ['original'], //可以指定是原图还是压缩图，默认二者都有sourceType: ['camera','album'], //从相机、相册选择success: (res) => {var tempFilePaths = res.tempFilePaths;if (_this.imgList.length+tempFilePaths.length > _this.imgMaxNum) {uni.showToast({title: '超过上传图片的最大数量',icon: 'none'})} else {if (_this.imgList.length != 0) {_this.imgList = _this.imgList.concat(res.tempFilePaths);} else {_this.imgList = res.tempFilePaths;}for (var i = 0; i < tempFilePaths.length; i++) {uni.uploadFile({url: baseUrl + "uploadImgAPP.do",filePath: tempFilePaths[i],name: "file", // 一定要与后台@RequestParam("file") MultipartFile变量名一致success(res) {console.log(res);}});}}}});},ViewImage(e) {uni.previewImage({urls: this.imgList,current: e.currentTarget.dataset.url});},DelImg(e) {this.imgList.splice(e.currentTarget.dataset.index, 1)},}
}

@RequestMapping("uploadImgAPP")
public String uploadImgAPP(@RequestParam("file") MultipartFile file,HttpServletRequest request){String fileName = "";if (file != null && !file.isEmpty()) {try {String targetSrc = request.getServletContext().getRealPath("/")+"files";fileName = file.getOriginalFilename();fileName = fileName.substring(fileName.lastIndexOf("."));fileName = UUID.randomUUID().toString() + fileName;File targetDir = new File(targetSrc);if (!targetDir.exists()) {targetDir.mkdirs();}File targetFile = new File(targetSrc, fileName);if (targetFile.exists()) {targetFile.delete();}file.transferTo(targetFile);} catch (Exception e) {e.printStackTrace();}}return fileName;
}