最近作者项目中用到了身份证识别跟营业执照的OCR识别，就研究了一下百度云跟腾讯云的OCR产品接口。
1.腾讯云OCR
收费：身份证OCR和营业执照OCR接口，每个接口每个月各有1000次的免费调用
接口说明：
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https://cloud.tencent.com/document/product/866/33524
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https://cloud.tencent.com/document/product/866/17598
身份证-OCR接入
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引入腾讯的SDK及JSON
com.tencentcloudapi tencentcloud-sdk-java 3.0.58 net.sf.json-lib json-lib 2.4 jdk15
2.前端html代码
3.后端代码
@PostMapping("uploadFile") @ResponseBody public IDCardOCRResponse OCRIdCardTest(@RequestParam(value = "file") MultipartFile file,@RequestParam(value = "card_side") String cardSize,Model model){ try { Credential cred = new Credential("AKIDGQfhYTqEs0DMvUQH93wXKsIX", "7adThzEEH6mK6zg9MMwX0"); HttpProfile httpProfile = new HttpProfile(); httpProfile.setEndpoint("ocr.tencentcloudapi.com"); ClientProfile clientProfile = new ClientProfile(); clientProfile.setHttpProfile(httpProfile); OcrClient client = new OcrClient(cred, "ap-beijing", clientProfile); Map params = new HashMap<>(); params.put("ImageBase64", getBase64FromInputStream(file.getInputStream())); params.put("CardSide", cardSize); System.out.println(getBase64FromInputStream(file.getInputStream())); IDCardOCRRequest req = IDCardOCRRequest.fromJsonString(JSONObject.fromObject(params).toString(), IDCardOCRRequest.class); IDCardOCRResponse resp = client.IDCardOCR(req); return resp; } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } return null; } 说明：new Credential("secretId","secretKey"),这两个参数在腾讯云控制台申请
4.getBase64FromInputStream代码，把MultipartFile 转为base64
public static String getBase64FromInputStream(InputStream in) { // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理 byte[] data = null; // 读取图片字节数组 try { ByteArrayOutputStream swapStream = new ByteArrayOutputStream(); byte[] buff = new byte[100]; int rc = 0; while ((rc = in.read(buff, 0, 100)) > 0) { swapStream.write(buff, 0, rc); } data = swapStream.toByteArray(); } catch (IOException e) { e.printStackTrace(); } finally { if (in != null) { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } return new String(Base64.encodeBase64(data)); }
运行前端html码，选择身份证图片，点击提交就可以返回身份证的信息了。
营业执照-OCR
1.前端html代码
2.后端代码
@PostMapping("bizlicense") @ResponseBody public String OCRBizlicenseTest(@RequestParam(value = "file") MultipartFile file) throws Exception{ RestTemplate restTemplate = new RestTemplate(); String apiUrl="https://recognition.image.myqcloud.com/ocr/bizlicense"; HttpHeaders headers = new HttpHeaders(); headers.set("host", "recognition.image.myqcloud.com"); headers.set("content-type", "application/json"); String authorization=QQOCRSignUtils.appSign(XXXX, "AKIDGQfhYTqEs0DXXX", "7adThzEEH6mKXXX", "", 10L); headers.set("authorization",authorization ); JSONObject params = new JSONObject(); params.put("appid", "XXX"); params.put("image", getBase64FromInputStream(file.getInputStream())); HttpEntity entity = new HttpEntity (params, headers); HttpEntity response = restTemplate.postForEntity(apiUrl, entity, String.class); return response.getBody(); }
3.QQOCRSignUtils.appSign
/** * 生成 Authorization 签名字段 * * @param appId * @param secretId * @param secretKey * @param bucketName * @param expired * @return * @throws Exception */ public static String appSign(long appId, String secretId, String secretKey, String bucketName, long expired) throws Exception { long now = System.currentTimeMillis() / 1000; int rdm = Math.abs(new Random().nextInt()); String plainText = String.format("a=%d&b=%s&k=%s&t=%d&e=%d&r=%d", appId, bucketName, secretId, now, now + expired, rdm); byte[] hmacDigest = HmacSha1(plainText, secretKey); byte[] signContent = new byte[hmacDigest.length + plainText.getBytes().length]; System.arraycopy(hmacDigest, 0, signContent, 0, hmacDigest.length); System.arraycopy(plainText.getBytes(), 0, signContent, hmacDigest.length, plainText.getBytes().length); return Base64Encode(signContent); } 运行前端html码，选择营业执照图片，点击提交就可以返回营业执照的信息了。
2.百度OCR
通过以下步骤创建OCR应用，作者当时在这一步花了很长时间
创建完之后就可以拿到appId，API Key，Secret Key，就可以调用百度提供的api了
收费：身份证OCR和营业执照OCR接口，每个接口每天各有500次的免费调用
接口说明：
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https://cloud.baidu.com/doc/OCR/OCR-API.html#.E8.BA.AB.E4.BB.BD.E8.AF.81.E8.AF.86.E5.88.AB
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https://cloud.baidu.com/doc/OCR/OCR-API.html#.E8.90.A5.E4.B8.9A.E6.89.A7.E7.85.A7.E8.AF.86.E5.88.AB
身份证OCR
只列出后端的代码，前端代码跟腾讯的一样，只不过前后面身份证枚举值不一样，参考接口文档说明。
@PostMapping("ocridcard") @ResponseBody public String OCRIdCardTest(@RequestParam(value = "file") MultipartFile file,@RequestParam(value = "card_side") String cardSize,Model model){ try { RestTemplate restTemplate = new RestTemplate(); HttpEntity response = restTemplate.postForEntity("https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=XXXXXX&client_secret=XXXXXX",null,String.class); JSONObject jsonObject = JSONObject.fromObject(response.getBody()); System.out.println(response.getBody()); String accessToken = jsonObject.getString("access_token"); String apiUrl="https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token="+accessToken; HttpHeaders headers = new HttpHeaders(); headers.set("content-type", "application/x-www-form-urlencoded"); MultiValueMap params = new LinkedMultiValueMap<>(); params.add("detect_direction", "true"); params.add("id_card_side", cardSize); params.add("image", Base64Utils.getBase64FromInputStream(file.getInputStream())); params.add("detect_risk", "true"); System.out.println(Base64Utils.getBase64FromInputStream(file.getInputStream())); System.out.println(URLDecoder.decode(URLEncoder.encode(Base64Utils.getBase64FromInputStream(file.getInputStream()),"UTF-8"),"UTF-8")); HttpEntity > entity = new HttpEntity<>(params, headers); response = restTemplate.postForEntity(apiUrl, entity, String.class); return response.getBody(); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } return null; } 营业执照OCR
@PostMapping("ocrbusinesslicense") @ResponseBody public String OCRBusinessLicenseTest(@RequestParam(value = "file") MultipartFile file,Model model){ try { RestTemplate restTemplate = new RestTemplate(); HttpEntity response = restTemplate.postForEntity("https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=XXXXX&client_secret=XXXXXX",null,String.class); JSONObject jsonObject = JSONObject.fromObject(response.getBody()); System.out.println(response.getBody()); String accessToken = jsonObject.getString("access_token"); String apiUrl="https://aip.baidubce.com/rest/2.0/ocr/v1/business_license?access_token="+accessToken; HttpHeaders headers = new HttpHeaders(); headers.set("content-type", "application/x-www-form-urlencoded"); MultiValueMap params = new LinkedMultiValueMap<>(); params.add("detect_direction", "true"); params.add("image", Base64Utils.getBase64FromInputStream(file.getInputStream())); System.out.println(Base64Utils.getBase64FromInputStream(file.getInputStream())); System.out.println(URLDecoder.decode(URLEncoder.encode(Base64Utils.getBase64FromInputStream(file.getInputStream()),"UTF-8"),"UTF-8")); HttpEntity > entity = new HttpEntity<>(params, headers); response = restTemplate.postForEntity(apiUrl, entity, String.class); return response.getBody(); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } return null; }
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