前言

這里我并沒有使用一些oss、七牛云等服務(wù)器上傳文件惰爬，而是采用的本地文件上傳喊暖，具體代碼如下:

后端

1、POM文件

    <parent>
        <artifactId>shangyou-parent</artifactId>
        <groupId>com.cluck.video</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
   
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
       
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
    </dependencies>

2撕瞧、application.yml文件

upload:
  file-space: E:\code\My Code\app\upload ###你自己想存放的文件路徑

3陵叽、servie層

    /** 文件上傳父目錄 */
    @Value("${upload.file-space}")
    private String fileSpace;
    @Override
    @Transactional
    public ResponseVo uploadFace(String userId, MultipartFile[] files) throws IOException {
        String token = redisTemplate.opsForValue().get(USER_REDIS_SESSION + ":" + userId);
        if (StringUtils.isEmpty(token) || StringUtils.isEmpty(userId)) {
            return ResponseVo.error("用戶id不能為空");
        }
        //數(shù)據(jù)庫(kù)相對(duì)路徑
        String uploadPathDB = "/" + userId + "/face";

        FileOutputStream outputStream = null;
        InputStream inputStream = null;
        String imageName = UUID.randomUUID().toString();

        try {
            if (files != null && files.length > 0) {
                //文件名稱
                String fileName = files[0].getOriginalFilename();
                fileName = imageName + (fileName.substring(fileName.lastIndexOf(".")));
                System.out.println("文件名稱:" + fileName);
                if (StringUtil.isNotEmpty(fileName)) {
                    //最終路徑
                    String filePathFace = fileSpace + uploadPathDB + "/" + fileName;
                    System.out.println(filePathFace);
                    //數(shù)據(jù)庫(kù)保存路徑
                    uploadPathDB += ("/" + fileName);

                    File file = new File(filePathFace);
                    if (file.getParentFile() != null || file.getParentFile().isDirectory()) {
                        //創(chuàng)建父文件夾
                        file.getParentFile().mkdirs();
                    }

                    outputStream = new FileOutputStream(file);
                    inputStream = files[0].getInputStream();

                    IOUtils.copy(inputStream, outputStream);
                }
            } else {
                return ResponseVo.error("上傳失敗~");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                outputStream.flush();
                outputStream.close();
            }
        }

        //TODO這里你可以把圖片地址保存到數(shù)據(jù)庫(kù)等等
       
        return ResponseVo.success(uploadPathDB);
    }

4、Controller層

    @PostMapping("/uploadFace")
    public ResponseVo uploadFace(String userId,
                                 @RequestParam("file")MultipartFile[] files) throws IOException {

        return usersService.uploadFace(userId, files);
    }

5.配置類

@Configuration
public class WebConfig implements WebMvcConfigurer {

    /** 文件上傳父目錄 */
    @Value("${upload.file-space}")
    private String fileSpace;

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**")
                .addResourceLocations("file:" + fileSpace + "/");
    }
}

后端代碼主要是想從前端接收到用戶id丛版，然后把用戶id當(dāng)成每個(gè)用戶的文件目錄巩掺，
類似于E:\code\My Code\app\upload\557a99f2-48d0-4bb0-b076-8f950a3e042b\face
然后你就可以通過http://127.0.0.1:8080/557a99f2-48d0-4bb0-b076-8f950a3e042b\face\1.jpg訪問圖片了

小程序端代碼

• 小程序開發(fā)文檔 https://developers.weixin.qq.com/miniprogram/dev/framework/
• 從本地相冊(cè)選擇圖片或使用相機(jī)拍照API。https://developers.weixin.qq.com/miniprogram/dev/api/media/image/wx.chooseImage.html
• 將本地資源上傳到服務(wù)器API页畦。https://developers.weixin.qq.com/miniprogram/dev/api/network/upload/wx.uploadFile.html
• 發(fā)起 HTTPS 網(wǎng)絡(luò)請(qǐng)求API胖替。https://developers.weixin.qq.com/miniprogram/dev/api/network/request/wx.request.html
  具體詳情可以參照小程序開發(fā)文檔

1、app.js

App({
  serverUrl: "http://127.0.0.1:8080",
  userInfo: null
})

2、upload.wxml

<image src="{{faceUrl}}" class="face" bindtap='changeFace'></image>

3独令、upload.js

const app = getApp()
Page({
  faceUrl: '../resource/image/1.jpg', //默認(rèn)圖片地址
}),
//上傳文件
changeFace:function() {
    //獲取全局變量
    var me = this;

    wx.chooseImage({//選擇文件
      success (res) {
        const tempFilePaths = res.tempFilePaths
        wx.showLoading({
          title: '上傳中...',
        })

        var user = app.userInfo
        var serverUrl = app.serverUrl
        //校驗(yàn)用戶id和圖片
        if(user.id == null || tempFilePaths[0].length <= 0) {
          wx.showToast({
            title: '用戶id或圖片不存在~',
          })
        }
        wx.uploadFile({//文件上傳
          url: serverUrl +'/user/uploadFace?userId=' + user.id,  //后端請(qǐng)求路徑
          filePath: tempFilePaths[0],
          name: 'file',
          header: {
            'content-type': 'application/json'
          },
          success (res){
            
           var data = JSON.parse(res.data);
           if(data.status == 0) {
             wx.hideLoading();
             wx.showToast({
               title: '頭像上傳成功',
               icon: 'success',
               duration: 1500
             })
            
             me.setData({ // 設(shè)置圖片
              faceUrl: serverUrl + data.msg
             })
           }
          }
        })

前端也都比較簡(jiǎn)單端朵，主要都是參考的api文檔那里也有具體示例，需要注意的就是文件上傳后success回調(diào)函數(shù)里data是個(gè)字符串燃箭，你需要把它轉(zhuǎn)為json也就是var data = JSON.parse(res.data);不然會(huì)出現(xiàn)undefined