Small program image upload function

Applet code:

UpImages.wxml

<button bindtap='uploadPhoto'>拍照选取照片上传</button>

 Simply draw a page, use the button to adjust the default upload (page, path) method of the applet, the default supports a single upload of a picture, which can be modified

 Upimages.js

Page({
  data: {
    imgData: []
  },
  uploadPhoto() { // 拍摄或从相册选取上传
    let that = this;
    wx.chooseImage({
      count: 1, // 默认9
      sizeType: ['compressed'], // 可以指定是原图还是压缩图，默认二者都有
      sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
      success(res) {
        let tempFilePaths = res.tempFilePaths; // 返回选定照片的本地路径列表 
        that.upload(that, tempFilePaths);
      }
    })
  },
  
  upload(page, path) { // 上传图片
    wx.showToast({
      icon: "loading",
      title: "正在上传……"
    });
    wx.uploadFile({
      url: '', //本地后端接口
      filePath: path[0],
      name: 'file',
      header: {
        "Content-Type": "multipart/form-data"   //必须是multipart/form-data格式才能上传文件
      },
      formData: {
        //和服务器约定的token, 一般也可以放在header中
        'session_token': wx.getStorageSync('session_token')
        },
      success(res) {
        console.log(res)
        if (res.statusCode != 200) {
          wx.showModal({
            title: '提示',
            content: '上传失败',
            showCancel: false
          });
          return;
        } else {
          wx.showModal({
            title: '提示',
            content: '上传成功',
            success: function (res) {
              if (res.confirm) { //这里是点击了确定以后
                console.log('用户点击确定')
                wx.navigateTo({
                  url: "../index/index" //这里是上传成功后确定返回页面
                })
              } else { //这里是点击了取消以后
                console.log('用户点击取消')
                wx.navigateTo({
                  url: "../index/index" //这里是上传成功后取消返回页面
                })
              }
            }
          })
        }
      },
      fail(e) {
        wx.showModal({
          title: '提示',
          content: '上传失败',
          showCancel: false
        });
      },
      complete() {
        wx.hideToast(); //隐藏Toast
      }
    })
  }
})

 backend receiving

I am currently using the SSM framework and need to add configuration in springmvc.xml

 springmvc.xml

<!-- 配置文件上传相关 -->
    <!--配置文件解析器对象，有了它就可以进行文件上传-->
    <!-- 配置文件解析器-->
    <!-- 此处id为固定写法，不能随便取名-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="1048576"></property>
    </bean>

 Controller layer code

//接收小程序上传的图片
    @RequestMapping(value = "/upload", method = {RequestMethod.POST, RequestMethod.GET})
    @ResponseBody
    public String[] uploadfile(MultipartFile[] file, HttpServletRequest request) {
        //本地服务器图片文件地址
        String dir = "D:\\images";
        String[] b = null;
        for (MultipartFile files : file) {
            String filename = files.getOriginalFilename();
            String suffix = filename.substring(filename.lastIndexOf("."));
            String path = filename;
            //创建要保存文件的路径
            String time = new Date().getTime() + "." + suffix;
            String[] a = {path, time};
            File dirFile = new File(dir, time);
            if (!dirFile.exists()) {
                dirFile.mkdirs();
            }
            try {
                //将文件写入创建的路径
                files.transferTo(dirFile);
                return a;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return b;
    }

 Remember the most important point: the name file of the applet and the name file received by the background Controller must be consistent in order to transfer the picture to the background