微信小程序实现同时上传多张图片

data: { 
 images: [], //选择的图片 
 },

wx.chooseImage({
 var that = this
 count: 9,
 sizeType: ['original', 'compressed'],
 sourceType: ['album', 'camera'],
 success: function(res){ 
 var successUp = 0; //成功，初始化为0
 var failUp = 0; //失败，初始化为0
 var length = that.data.images.length; //总共上传的数量
 var count = 0; //第几张，初始化为0
 var url = serverUrl + '/secondHand/uploadImg?id=' + secondHandId; //上传的接口
 //调用上传图片的公共函数
 that.uploadOneByOne(url, that.data.images, successUp, failUp, count, length);
 }, 
 });

/**
 * 上传图片：递归的方式上传
 * url:上传地址
 * imgPaths：上传的图片列表
 * successUp：上传成功的个数，初始化为0
 * failUp：上传失败的个数，初始化为0
 * count：第几张
 * length：图片列表的长度
 */
 uploadOneByOne(url, imgPaths, successUp, failUp, count, length) {
 var that = this;
 wx.uploadFile({
 url: url, //上传地址地址
 filePath: imgPaths[count],
 name: "file", //后台接收的文件名
 success: function(e) {
 successUp++; //成功+1
 },
 fail: function(e) {
 failUp++; //失败+1
 },
 complete: function(e) {
 count++; //下一张
 if (count == length) {
 TODO: 上传完毕后跳转页面
 wx.showToast({
 title: '发布成功',
 icon: 'success',
 duration: 2000
 })
 }
 else {
 //递归调用，上传下一张
 that.uploadOneByOne(url, imgPaths, successUp, failUp, count, length);
 }
 }
 })
 },

@PostMapping("/uploadImg")
public String addSecondHandImg(String id, @RequestParam("file") MultipartFile[] files) {
 //该接口被多次调用，这里写自己的业务，省略。。。
 return "";
}