企业微信小程序上传图片之从微信素材库获取图片并且上传目标服务器

我不是女神ヾ 2024-03-31 15:55 61阅读 0赞

## 一：从微信素材库获取照片 ##

### 1.获取的url ###

get请求

https://qyapi.weixin.qq.com/cgi-bin/media/get

### 2.需要的参数 ###

@Data
    @ApiModel(value = "CompanyWeChatUploadImgDto", description = "企业微信图片上传实体类")
    public class CompanyWeChatUploadImgDto implements Serializable {
        
        private static final long serialVersionUID = 6708935565631318783L;
        @ApiModelProperty("秘钥")
        @NotBlank(message = "秘钥不能为空")
        private String accessToken;
        @ApiModelProperty("图片位置id")
        @NotBlank(message = "图片位置id不能为空")
        private String mediaId;
    }

accessToken和mediaId都是由前端人员传递，后台负责接收就行

### 3.使用restTemplate远程调用获取图片 ###

String url = weChatUrl+ "?access_token=" + accessToken + "&media_id=" + mediaId;
            ResponseEntity<byte[]> exchange = restTemplate.exchange(url, HttpMethod.GET, null, byte[].class);

我们将exchange的返回值定义为byte数组，方便后续转化

### 4.将byte数组转化为inputStream ###

byte[] data = exchange.getBody();
    InputStream inputStream = new ByteArrayInputStream(data);

### 5.将inputStream写入图片要上传的路径 ###

String imgUrl = "image/20221207135456/photo.jpg";
    File newFile = new File(imgUrl );
    FileUtils.copyInputStreamToFile(inputStream, newFile);

## 二：将流文件上传目标服务器 ##

### 1.上传文件 ###

//上传文件
    boolean upload = uploadImg(newFile, imgUrl);

### 2.代码实现 ###

/**
         * 上传文件到服务器
         *
         * @param uploadFile 文件
         * @param imgUrl   文件路径
         * @return 是否上传
         */
        public boolean uploadImg(File uploadFile, String imgUrl) {
        
            if (!uploadFile.exists()) {
        
                return false;
            }
            try {
        
                // 创建ObsClient实例
                ObsClient obsClient = new ObsClient(ak, sk, endPoint);
                PutObjectResult putObjectResult = obsClient.putObject(bucketName, imgUrl, uploadFile);
                if (putObjectResult.getStatusCode() == HttpServletResponse.SC_OK) {
        
                    return true;
                }
                return false;
            } catch (Exception e) {
        
                log.error("文件上传失败obs，文件名：{}", imgUrl);
                return false;
            } finally {
        
                //删除本地文件
                uploadFile.deleteOnExit();
            }
        }

## 三：从上传的服务器获取图片路径 ##

public void dealImgUrl(HttpServletResponse response, String imgUrl) throws IOException {
        
            // 创建ObsClient实例
            ObsClient obsClient = new ObsClient(ak, sk, endPoint);
            ObsObject obsObject = obsClient.getObject(bucketName, imgUrl);
            OutputStream os = response.getOutputStream();
            InputStream is = obsObject.getObjectContent();
            // 只允许 jpeg，png 和 gif
            try {
        
                if (pictureKey.endsWith(".jpeg")) {
        
                    response.setContentType("image/jpeg");
                }
                if (pictureKey.endsWith(".png")) {
        
                    response.setContentType("image/png");
                }
                if (pictureKey.endsWith(".gif")) {
        
                    response.setContentType("image/gif");
                }
                byte[] buf = new byte[1024];
                int len = 0;
                while ((len = is.read(buf)) > 0) {
        
                    os.write(buf, 0, len);
                }
                os.flush();
            } catch (Exception e) {
        
                log.error("FileManagementUtils.downloadFile error = {}", e);
                throw e;
            } finally {
        
                is.close();
                os.close();
            }
        }