js 选择文件部分
//选择上传文件方式
chooseFile: function () {
var that = this;
wx.showActionSheet({
itemList: [‘选择文件’, ‘拍照或相册’],
success: function (res) {
if (!res.cancel) {
if (res.tapIndex==0){
// 选择对话再选择文件
wx.chooseMessageFile({
count: 10, //能选择文件的数量
type: ‘file’, //能选择文件的类型,我这里只允许上传文件.还有视频,图片,或者都可以
success(res) {
if (res.tempFiles.length > 0) {
//循环比较
for (var i = 0; i < res.tempFiles.length; i++) {
var newupfilelist = that.data.allpath.concat(res.tempFiles[i].path) + ‘,’;
var newfilename = that.data.allfilename.concat(res.tempFiles[i].name) + ‘,’ + ‘\n’;
that.setData({
allpath: newupfilelist, //将文件的路径保存在页面的变量上,方便 wx.uploadFile调用
allfilename: newfilename //渲染到wxml方便用户知道自己选择了什么文件
})
}
}
}
})
}else{
wx.chooseImage({
count: 9,
sizeType: [‘original’, ‘compressed’],
sourceType: [‘album’, ‘camera’],
success(res) {
// tempFilePath可以作为img标签的src属性显示图片
const tempFilePaths = res.tempFilePaths
if (tempFilePaths.length > 0) {
//循环比较
for (var i = 0; i < tempFilePaths.length; i++) {
var imgname = tempFilePaths[i].split("")[1].substring(tempFilePaths[i].split("")[1].length - 20, tempFilePaths[i].split("_")[1].length);
var newupfilelist = that.data.allpath.concat(tempFilePaths[i]) + ‘,’;
var newfilename = that.data.allfilename.concat(imgname) + ‘,’ + ‘\n’;
that.setData({
allpath: newupfilelist, //将文件的路径保存在页面的变量上,方便 wx.uploadFile调用
allfilename: newfilename //渲染到wxml方便用户知道自己选择了什么文件
})
}
}
}
})
}
}
}
});
}

循环上传部分

          var allpaths = that.data.allpath.split(","); 
          var allfilenames = that.data.allfilename.split(","); 
          wx.showToast({
            title: "请等待，附件上传中...",
            icon: "none"
          })
          //将图片路径循环赋值给filePath参数
          for (var i = 0; i < allpaths.length-1; i++) {
            var imgUrl = allpaths[i];
            var filename = allfilenames[i];
            wx.uploadFile({
              //上传图片的网路请求地址
              url: wx.getStorageSync('serverurl') + '/advisoryRecord/xcxAddUploadFile',
              //选择
              filePath: imgUrl,
              name: 'file',
              formData: {
                'ordId': orderinfId,   
                'filename': filename,
                'userid': wx.getStorageSync('openId'), 
                'unionid': wx.getStorageSync('unionId')
              },
              success: function (res) {
                wx.showToast({
                  title: "发布成功",
                  icon: "none"
                })
                  // 加跳转
                wx.navigateBack({
                  delta: 1,
                  success: function (e) {
                    var page = getCurrentPages().pop();
                    if (page == undefined || page == null) return;
                    page.onLoad();
                  }
                }) 
              },
              fail: function (res) {
                wx.showToast({
                  title: "文件上传失败",
                  icon: "none"
                })
              }
            });
          }//for循环结束 
          
          
          
          后台Java部分
          
          /**
 * 循环上传图片文件 发布咨询的时候
 * 
 * @param orderInf
 * @return
 * @param orderInf
 * @return
 * @param userid
 *            state usertype comname comcode insurancedetail expertrate insuranceuser expertcompany title tags desc accessories username imagecontents accuratePrice conditions
 * @return jsonobject
 */
@RequestMapping(value = "/xcxAddUploadFile", method = RequestMethod.POST)
@ResponseBody
public JSONObject xcxAddUploadFile(HttpServletRequest request) {
	JSONObject jsondata = new JSONObject();

	try {
		MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;

		// 对应前端的upload的name参数"file"
		MultipartFile multipartFile = req.getFile("file");
		String ordId = req.getParameter("ordId");
		String userid = req.getParameter("userid");
		String unionid = req.getParameter("unionid");
		String filename = req.getParameter("filename");
		System.out.println(ordId);
		// 服务器项目路径
		String pathRoot = request.getSession().getServletContext().getRealPath("");
		String realPath = pathRoot.substring(0, pathRoot.lastIndexOf("\\")) + "\\insurancepic\\";

		// 取得图片的格式后缀
		String originalLastName = multipartFile.getOriginalFilename();
		String picLastName = originalLastName.substring(originalLastName.lastIndexOf("."));

		// 拼接：名字+时间戳+后缀
		String picName = UUID.generate() + picLastName;
		String accessories = "/insurancepic/" + picName;
		System.out.println("accessories:" + accessories);
		try {
			File dir = new File(realPath);
			// 如果文件目录不存在，创建文件目录
			if (!dir.exists()) {
				dir.mkdir();
				System.out.println("创建文件目录成功：" + realPath);
			}
			File file = new File(realPath, picName);
			multipartFile.transferTo(file);
			if (!StringUtils.isEmpty(ordId)) {
				AdvisoryRecord advisoryRecord = new AdvisoryRecord();
				advisoryRecord.setId(UUID.generate());
				advisoryRecord.setUserid(userid);
				advisoryRecord.setUnionid(unionid);
				advisoryRecord.setOrdId(ordId);
				advisoryRecord.setAccessories(accessories);
				advisoryRecord.setType(ConstantUtils.RECORD_TYPE_ZERO);
				if (filename == null || "".equals(filename)) {
					advisoryRecord.setContents(originalLastName);
				} else {
					advisoryRecord.setContents(filename);
				}

				// 增加新纪录
				Boolean result = advisoryRecordDAO.addAdvisoryRecord(advisoryRecord);
				// 如果增加失败
				if (result == false) {
					jsondata.put(ConstantUtils.STATUS, ConstantUtils.ZERO);
					jsondata.put(ConstantUtils.MSG, "提交失败");
					log.error(advisoryRecord.getOrdId() + "提交失败");
					return jsondata;
				}
			}
			jsondata.put(ConstantUtils.STATUS, ConstantUtils.ONE);
			jsondata.put(ConstantUtils.MSG, ConstantUtils.SUCCESS);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (IllegalStateException e) {
			e.printStackTrace();
		}
		jsondata.put(ConstantUtils.STATUS, ConstantUtils.ONE);
	} catch (Exception e) {
		jsondata.put(ConstantUtils.STATUS, ConstantUtils.ZERO);
		jsondata.put(ConstantUtils.MSG, "上传文件失败");
		log.error("文件上传失败", e);
		return jsondata;
	}
	return jsondata;
}