效果图：
目录结构:
单独定义文件上传方法，在你需要的地方引入就可以了
httputil.js
function send_photo(data, successfun) { var that = this for (let i = 0; i < data.length; i++) { console.log("data长度=" + data.length) console.log(data) wx.uploadFile({ url: BASE_Server + "/FileUpLoadController/upload.action", //仅为示例，非真实的接口地址 自己写映射你Java接口的路径 filePath: data[i] + "", name: 'file', success: function(res) { successfun(res) } }) } } module.exports = { send_photo: send_photo }
引用：
.js
1 var app = getApp(); 2 const httputil = require("../../base/js/httputil.js") //一定要引入，根据你自己写的上传文件路径 3 4 Page({ 5 data: { 6 photos: "/images/photo.png", 7 photos2: "/images/photo.png", 8 photos3: "/images/photo.png" 9 }, 10 formSubmit: function(e) { 11 var photo = [this.data.photos, this.data.photos2, this.data.photos3] 12 httputil.send_photo(photo, function(res) { 13 //成功回调函数 你随便做操作 17 } 18 }, 19 touchphoto: function(e) { 20 var that = this 21 var no = e.currentTarget.id; 22 if (no == "1") { 23 wx.chooseImage({ 24 count: 1, // 默认9 25 sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有 26 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有 27 success: function(res) { 28 // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片 29 var tempFilePaths = res.tempFilePaths 30 that.setData({ 31 photos: tempFilePaths 32 }) 33 console.log(that.data.photos) 34 } 35 }) 36 } else if (no == "2") { 37 wx.chooseImage({ 38 count: 1, // 默认9 39 sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有 40 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有 41 success: function(res) { 42 // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片 43 var tempFilePaths = res.tempFilePaths 44 that.setData({ 45 photos2: tempFilePaths 46 }) 47 console.log(that.data.photos) 48 } 49 }) 50 } else if (no == "3") { 51 wx.chooseImage({ 52 count: 1, // 默认9 53 sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有 54 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有 55 success: function(res) { 56 // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片 57 var tempFilePaths = res.tempFilePaths 58 that.setData({ 59 photos3: tempFilePaths 60 }) 61 console.log(that.data.photos) 62 } 63 }) 64 } 65 } 66 })
wxml
<text class='textp'>身份证照片</text> <text class='textpp'>驾驶证照片</text> <view class='photo'> <image class='ph' src='{{photos}}'id="1" bindtap='touchphoto' mode='aspectFit'></image> <image class='ph' src='{{photos2}}' id="2" bindtap='touchphoto' mode='aspectFit'></image> <image class='phright' src='{{photos3}}' id="3" bindtap='touchphoto' mode='aspectFit'></image> </view> <text class='text'>正面</text><text class='text2'>反面</text><text class='text3'>人像面</text>
wxss
.photo { display: flex; margin-top: 10px; height: 100px; } .ph { border: 1px dashed #909090; margin-right: 30px; width: 80px; height: 60px; } .phzz { border: 1px dashed #909090; margin-right: 70px; margin-left: 70px; width: 100px; height: 60px; } .phright{ border: 1px dashed #909090; margin-left: 20px; width: 80px; height: 60px; } .textp{ margin-left: 70px; font-size: 14px; } .text{ margin-left: 25px; font-size: 14px; } .text2{ margin-left: 80px; font-size: 14px; } .text3{ margin-left: 98px; font-size: 14px; }
java代码：
import com.alibaba.fastjson.JSON; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.util.HashMap; import java.util.List; /** * Created by majl on 2017/9/1. */ @Controller @RequestMapping("/upload") public class UploadController { private static final Logger logger = LoggerFactory.getLogger(UploadController.class); @RequestMapping("/picture") public void uploadPicture(HttpServletRequest request, HttpServletResponse response) throws Exception { //获取文件需要上传到的路径 String path = request.getRealPath("/upload") + "/"; File dir = new File(path); if (!dir.exists()) { dir.mkdir(); } logger.debug("path=" + path); request.setCharacterEncoding("utf-8"); //设置编码 //获得磁盘文件条目工厂 DiskFileItemFactory factory = new DiskFileItemFactory(); //如果没以下两行设置的话,上传大的文件会占用很多内存， //设置暂时存放的存储室,这个存储室可以和最终存储文件的目录不同 /** * 原理: 它是先存到暂时存储室，然后再真正写到对应目录的硬盘上， * 按理来说当上传一个文件时，其实是上传了两份，第一个是以 .tem 格式的 * 然后再将其真正写到对应目录的硬盘上 */ factory.setRepository(dir); //设置缓存的大小，当上传文件的容量超过该缓存时，直接放到暂时存储室 factory.setSizeThreshold(1024 * 1024); //高水平的API文件上传处理 ServletFileUpload upload = new ServletFileUpload(factory); try { List<FileItem> list = upload.parseRequest(request); FileItem picture = null; for (FileItem item : list) { //获取表单的属性名字 String name = item.getFieldName(); //如果获取的表单信息是普通的 文本 信息 if (item.isFormField()) { //获取用户具体输入的字符串 String value = item.getString(); request.setAttribute(name, value); logger.debug("name=" + name + ",value=" + value); } else { picture = item; } } //自定义上传图片的名字为userId.jpg String fileName = request.getAttribute("userId") + ".jpg"; String destPath = path + fileName; logger.debug("destPath=" + destPath); //真正写到磁盘上 File file = new File(destPath); OutputStream out = new FileOutputStream(file); InputStream in = picture.getInputStream(); int length = 0; byte[] buf = new byte[1024]; // in.read(buf) 每次读到的数据存放在buf 数组中 while ((length = in.read(buf)) != -1) { //在buf数组中取出数据写到（输出流）磁盘上 out.write(buf, 0, length); } in.close(); out.close(); } catch (FileUploadException e1) { logger.error("", e1); } catch (Exception e) { logger.error("", e); } PrintWriter printWriter = response.getWriter(); response.setContentType("application/json"); response.setCharacterEncoding("utf-8"); HashMap<String, Object> res = new HashMap<String, Object>(); res.put("success", true); printWriter.write(JSON.toJSONString(res)); printWriter.flush(); } --------------------- 作者：庭然 来源：CSDN 这段代码我在网上找的最简单好用的，我本地写的接口封装类过多，就不写了