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();
}
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作者：庭然
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