一、生成微信小程序二维码
微信官网API文档
1.下载到本地
@Overridepublic String getWxRemovalCode() {String appId = "微信小程序AppID";String secret = "微信小程序AppSecret";//获取凭证String token = weiXinService.getAccessToken(appId, secret);Map<String, Object> params = new HashMap<>();//前端页面需要的数据params.put("scene", value);//扫码后进入小程序的页面位置params.put("path", "https://argentian.com.cn/home/home"); //不是必须，需要的宽度，默认430x430，最小280最大1280params.put("width", 280);//默认是false，是否需要透明底色，为 true 时，生成透明底色的小程序params.put("is_hyaline", true);CloseableHttpClient httpClient = HttpClientBuilder.create().build();HttpPost httpPost = new HttpPost("https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + token);httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");String body = JSON.toJSONString(params);//必须是json模式的 postStringEntity entity = null;try {InputStream inputStream = null;try {entity = new StringEntity(body);entity.setContentType("image/png");httpPost.setEntity(entity);HttpResponse response;response = httpClient.execute(httpPost);inputStream = response.getEntity().getContent();String path = "D:\\\\code\\wx";//文件路径//生成图片文件File file = new File(path);//如果文件夹不存在就创建文件夹if (!file.exists()) {file.mkdirs();}OutputStream os = null;try {os = new FileOutputStream(file + "\\文件名");int len = 0;byte[] buffer = new byte[8192];while ((len = inputStream.read(buffer)) != -1) {os.write(buffer, 0, len);}} finally {os.close();inputStream.close();}} catch (Exception e) {e.printStackTrace();return "生成失败";}} catch (Exception e) {e.printStackTrace();return "生成失败";}}return "生成微信小程序二维码成功";}
2.存到图片服务器（实例：阿里云图片服务器）
@Overridepublic String getWxRemovalCode() {String appId = "微信小程序AppID";String secret = "微信小程序AppSecret";//获取凭证String token = weiXinService.getAccessToken(appId, secret);Map<String, Object> params = new HashMap<>();//前端页面需要的数据params.put("scene", value);//扫码后进入小程序的页面位置params.put("path", "https://argentian.com.cn/home/home"); //不是必须，需要的宽度，默认430x430，最小280最大1280params.put("width", 280);//默认是false，是否需要透明底色，为 true 时，生成透明底色的小程序params.put("is_hyaline", true);CloseableHttpClient httpClient = HttpClientBuilder.create().build();HttpPost httpPost = new HttpPost("https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + token);httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");String body = JSON.toJSONString(params);//必须是json模式的 postStringEntity entity = null;try {InputStream inputStream = null;try {entity = new StringEntity(body);entity.setContentType("image/png");httpPost.setEntity(entity);HttpResponse response;response = httpClient.execute(httpPost);inputStream = response.getEntity().getContent();Date date = new Date();Long timestamp = date.getTime();String fileName = timestamp.toString() + ".png";//文件名//生成图片文件File file = new File(fileName );OutputStream os = null;try {os = new FileOutputStream(file);int len = 0;byte[] buffer = new byte[8192];while ((len = inputStream.read(buffer)) != -1) {os.write(buffer, 0, len);}} finally {os.close();inputStream.close();}//转成文件格式DiskFileItem fileItem = (DiskFileItem) new DiskFileItemFactory().createItem("file",MediaType.ALL_VALUE, true, file.getName());try (InputStream input = new FileInputStream(file); OutputStream os = fileItem.getOutputStream()) {IOUtils.copy(input, os);} catch (Exception e) {throw new IllegalArgumentException("Invalid file: " + e, e);}MultipartFile multipartFile = new CommonsMultipartFile(fileItem);//调用阿里云静态方法上传到阿里云服务器并返回图片地址String url = FileUpload.aliyunUpload(multipartFile);return url;} catch (Exception e) {e.printStackTrace();}} catch (Exception e) {e.printStackTrace();}return "操作失败";}
public static String aliyunUpload(MultipartFile myFile) {// 上传路径String dateString = DateUtil.getDate(new Date(), DateUtil.YYYYMMDD);String oldFileName = myFile.getOriginalFilename();if(!oldFileName.contains(".")){oldFileName=myFile.getName();}String objectName = dateString + SLASH + UUID.randomUUID().toString().replaceAll("-", "") +oldFileName.substring(oldFileName.lastIndexOf("."));// 创建OSSClient实例。OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);try {InputStream inputStream = myFile.getInputStream();ObjectMetadata meta = new ObjectMetadata();meta.setContentType("image/jpg");// 创建PutObject请求。ossClient.putObject(bucketName, objectName, inputStream, meta);} catch (Exception oe) {} finally {if (ossClient != null) {ossClient.shutdown();}}//访问图片路径String urlPrefix = "argentian";//前缀return urlPrefix + objectName;}
二、生成支付宝小程序二维码
支付宝官方API文档
@Override
public String getZfbRemovalCode(HttpServletResponse response2) {String appId = "支付宝小程序appId";String privateKey = "应用私钥";String alipayPublicKey = "支付宝公钥";AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do",appId, privateKey, "json", "UTF-8", alipayPublicKey, "RSA2");AlipayOpenAppQrcodeCreateRequest request = new AlipayOpenAppQrcodeCreateRequest();AlipayOpenAppQrcodeCreateModel model = new AlipayOpenAppQrcodeCreateModel();model.setUrlParam("/pages/home/home");model.setDescribe("小程序二维码");//自定义数据 key=valuemodel.setQueryParam("key=" + value);request.setBizModel(model);AlipayOpenAppQrcodeCreateResponse response = alipayClient.execute(request);if (response.isSuccess()) {//获取响应数据里面的蓝底圆码链接地址String url = response.getQrCodeUrlCircleBlue();//将普通下载到本地指定文件夹下String imageUrl = downloadWithUrl(url, response2);//裁剪图片（生成的二维码下放有 “打开支付宝[扫一扫]” 文字描述，将文字描述裁剪掉）cutOutImage(imageUrl, "裁剪后本地存放路径","裁剪后文件名" , 14, 14, 270, 270);}} catch (AlipayApiException e) {log.error("AlipayApiException:", e);} catch (Exception e) {log.error("AdminException:", e);}}return "生成支付宝二维码成功";}
/*** 通过URL下载文件*/public String downloadWithUrl(String path, HttpServletResponse response) throws IOException {//设置响应参数response.setCharacterEncoding("UTF-8");response.setContentType("multipart/form-data");//response.setHeader("Content-Disposition", " attachment; filename=" + fileName);//使用此会导致中文变“_”下划线response.setHeader("Content-Disposition", " attachment; filename=" + new String(fileName.getBytes(), "iso-8859-1"));InputStream is = null;OutputStream os = null;;String filePath = "";//文件路径//生成图片文件File file = new File(filePath );if (!file.exists()) {file.mkdirs();}try {//创建数据流，执行下载URL url = new URL(path);is = url.openStream();os = new FileOutputStream(file + "\\文件名");byte[] bytes = IOUtils.toByteArray(is);os.write(bytes);return file + "\\文件名";} finally {if (null != os)os.close();if (null != is)is.close();}}
/*** 图片裁剪** @param imagePath 图片地址* @param outputDir 临时目录* @param name 文件名* @param startX 裁剪起始x坐标* @param startY 裁剪起始y坐标* @param weight 裁剪宽度* @param height 裁剪高度* @throws Exception 异常*/public static String cutOutImage(String imagePath,String outputDir,String name,Integer startX,Integer startY,Integer weight,Integer height)throws Exception {List<String> paths = Splitter.on(".").splitToList(imagePath);String ext = paths.get(paths.size() - 1);if (!Arrays.asList("png", "jpg").contains(ext)) {throw new Exception("format error");}//生成文件名String resultPath =Joiner.on(File.separator).join(Arrays.asList(outputDir, IdUtil.simpleUUID() + "." + ext));//自定义文件名String path = outputDir + "\\" + name;String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);ProcessBuilder builder =new ProcessBuilder(ffmpeg,"-i",imagePath,"-vf",MessageFormat.format("crop={0}:{1}:{2}:{3}",String.valueOf(weight),String.valueOf(height),String.valueOf(startX),String.valueOf(startY)),"-y",path//生成文件名or自定义文件名);builder.inheritIO().start().waitFor();return path;}
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