微信小程序获取base64头像上传

小程序端

onChooseAvatar(e) {
  const { avatarUrl } = e.detail;
  this.avatarUrl = avatarUrl;
  let that = this;

  uni.getFileSystemManager().readFile({
    filePath: that.avatarUrl,
    encoding: "base64",
    success(res) {
      that.base64Avatar = res.data;
      //将base64图片上传到服务器
      that.uploadpic(that.base64Avatar);
    },
    fail(e) {
      that.$util.Tips({
        title: "头像读取失败,请稍后再试",
        icon: "error",
      });
    },
  });
}

uploadpic(base64Str) {
  let that = this;
  uni.request({
    url: HTTP_ADMIN_URL + "/api/admin/upload/base64Image",
    method: "POST",
    header: {
      "Content-Type": "application/x-www-form-urlencoded",
    },
    data: {
      base64Str,
    },
    success: function (res) {
      uni.hideLoading();
      if (res.data.code === 400) {
        that.$util.Tips({
          title: res.data.message,
        });
      } else {
        let data = res.data;
        if (data.code === 200) {
          that.avatarUrl = data.message;
          that.$util.Tips({
            title: "头像上传成功",
          });
        } else {
          that.$util.Tips({
            title: "头像上传失败",
          });
        }
      }
    },
    fail: function (res) {
      uni.hideLoading();
      that.$util.Tips({
        title: "上传图片失败",
      });
    },
  });
}

服务器端

@Override
public String imageBase64Upload(String base64Str) throws IOException {


//uploadUrl = bucketName+region 比如test.oss-cn-hangzhou.aliyuncs.com
// accessKey osskey
// secretKey  ossSecretKey
// storeageName bucketName
// storageRegion oss-cn-hangzhou.aliyuncs.com

    OSS ossClient = new OSSClientBuilder().build(region, accessKey, secretKey);
//解码图片base64
    byte[] bytesFile = Base64.decode(base64Str);
    try {
        // 创建PutObject请求。
        InputStream inputStream = new ByteArrayInputStream(bytesFile);
        String rootPath = DateUtil.nowDate(Constants.DATE_FORMAT_DATE).replace("-", "/") + "/";
        String filePath =  "wechat/head/"+rootPath (年/月日的文件夹);
        //随机文件夹名称
        String name =  Uuid()+".png";
        //要存到oss哪个路径,什么名称
        String fileName = filePath+name;
      //发起请求 bucketName就是oss创建的bucketName
        ossClient.putObject(bucketName, fileName, inputStream);
        //uploadUrl 就是由bucketName+region组成的路径
        String url = uploadUrl + "/" + fileName;
        return url;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    } finally {
        if (ossClient != null) {
            ossClient.shutdown();
        }
    }

}

返回oss的图片路径,再发起微信授权的时候把这个路径保存到数据库
在用户 token没失效的时候可以使用这个路径
如果失效了得重新上传，这里不知道怎么解决好