springboot 整合 百度OCR身份证识别

这次 给大家带来的是百度的身份证图片识别，总体来是属于比较简单的，百度的API开发文档也写的比较清楚：https://ai.baidu.com/docs#/OCR-API-Idcard/41062b1a

使用百度身份证识别前要先申请百度的账号以及申请相对应用  https://cloud.baidu.com/ 

选择  产品-->人工智能-->文字识别-->卡证文字识别    进到里面选择身份证识别

再选择管理应用   点击身份证识别添加应用 

得到等会需要用到的API Key  和 Secret Key

准备工作已经完成了 现在直接上代码，因为比较简单，我就不一一解释，不懂的就留言好了

pom.xml

        
        
            com.baidu.aip
            java-sdk
            4.3.2
        

import org.springframework.boot.configurationprocessor.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public class BaiDuOCR {

    public static String getAuth() {
        // 官网获取的 API Key
        String clientId = "GZaw2gGRPWV4**********";
        // 官网获取的 Secret Key
        String clientSecret = "sBOEHzGShfGC*************";
        return getAuth(clientId, clientSecret);
    }

    /**
     * 获取token
     * @param ak
     * @param sk
     * @return
     */
    public static String getAuth(String ak, String sk) {
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + ak
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + sk;
        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            //百度推荐使用POST请求
            connection.setRequestMethod("POST");
            connection.connect();
            // 获取所有响应头字段
            Map> map = connection.getHeaderFields();
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            //System.out.println("result:" + result);
            JSONObject jsonObject = new JSONObject(result);
            String access_token = jsonObject.getString("access_token");
            return access_token;
        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }


    /**
     * 调用OCR
     * @param httpUrl
     * @param httpArg
     * @return
     */
    public static String request(String httpUrl, String httpArg) {
        BufferedReader reader = null;
        String result = null;
        StringBuffer sbf = new StringBuffer();
        try {
            //用java JDK自带的URL去请求
            URL url = new URL(httpUrl);
            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            //设置该请求的消息头
            //设置HTTP方法：POST
            connection.setRequestMethod("POST");
            //设置其Header的Content-Type参数为application/x-www-form-urlencoded
            connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
            // 填入apikey到HTTP header
            connection.setRequestProperty("apikey", "uml8HFzu2hFd8iEG2LkQGMxm");
            //将第二步获取到的token填入到HTTP header
            connection.setRequestProperty("access_token", BaiDuOCR.getAuth());
            connection.setDoOutput(true);
            connection.getOutputStream().write(httpArg.getBytes("UTF-8"));
            connection.connect();
            InputStream is = connection.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {
                sbf.append(strRead);
                sbf.append("\r\n");
            }
            reader.close();
            result = sbf.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     *身份证参数转换
     * @param jsonResult
     * @return
     */
    public static HashMap getHashMapByJson(String jsonResult) {
        HashMap map = new HashMap();
        try {
            JSONObject jsonObject = new JSONObject(jsonResult);
            JSONObject words_result = jsonObject.getJSONObject("words_result");
            Iterator it = words_result.keys();
            while (it.hasNext()) {
                String key = it.next();
                JSONObject result = words_result.getJSONObject(key);
                String value = result.getString("words");
                switch (key) {
                    case "姓名":
                        map.put("姓名", value);
                        break;
                    case "民族":
                        map.put("民族", value);
                        break;
                    case "住址":
                        map.put("住址", value);
                        break;
                    case "公民身份号码":
                        map.put("公民身份号码", value);
                        break;
                    case "出生":
                        map.put("出生日期", value);
                        break;
                    case "性别":
                        map.put("性别", value);
                        break;
                    case "失效日期":
                        map.put("失效日期", value);
                        break;
                    case "签发日期":
                        map.put("签发日期", value);
                        break;
                    case "签发机关":
                        map.put("签发机关", value);
                        break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return map;
    }

}

base64 本地文件转换

import sun.misc.BASE64Encoder;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

public class BASE64 {
    /**
     * 将本地图片进行Base64位编码
     * 

     * imgUrl 图片的url路径，如e:\\123.png
     *
     * @return
     */
    public static String encodeImgageToBase64(File imageFile) {
        // 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
        // 其进行Base64编码处理
        byte[] data = null;
        // 读取图片字节数组
        try {
            InputStream in = new FileInputStream(imageFile);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        // 对字节数组Base64编码
        BASE64Encoder encoder = new BASE64Encoder();
        // 返回Base64编码过的字节数组字符串
        return encoder.encode(data);
    }
}

接下来 先写一个本地图片识别测试

public static void main(String[] args) {
        //获取本地的绝对路径图片
        File file = new File("F:\\timg2.jpg");
        //进行BASE64位编码
        String imageBase = BASE64.encodeImgageToBase64(file);
        imageBase = imageBase.replaceAll("\r\n", "");
        imageBase = imageBase.replaceAll("\\+", "%2B");
        //百度云的文字识别接口,后面参数为获取到的token
        String httpUrl = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token="+BaiDuOCR.getAuth();
        //id_card_side=front 识别正面    id_card_side=back  识别背面
        String httpArg = "detect_direction=true&id_card_side=front&image=" + imageBase;
        String jsonResult = BaiDuOCR.request(httpUrl, httpArg);
        //System.out.println("返回的结果--------->" + jsonResult);
        HashMap map = BaiDuOCR.getHashMapByJson(jsonResult);
        for (String key : map.keySet()) {
            System.out.println(key +": "+ map.get(key));
        }
    }

然后再给一个是前端 传过来的时进行识别，其实和本地识别区别在于 base64的转换一样，其他都是一样的，所以顺便也给你们贴出来 

/**
     * 图片识别
     * @param picOcr
     * @throws Exception
     */
    @PostMapping("/ocr")
    public void picOCR(@RequestParam("pic") MultipartFile picOcr) throws Exception {
        byte[] data = null;
        BASE64Encoder base64Encoder = new BASE64Encoder();
        String base64 = base64Encoder.encode(picOcr.getBytes());
        base64 = base64.replaceAll("\r\n", "");
        base64 = base64.replaceAll("\\+", "%2B");
        String httpUrl = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token=" + BaiDuOCR.getAuth();
        //正面照
        String httpFront = "detect_direction=true&id_card_side=front&image=" + base64;
        //背面照
        String httpBack = "detect_direction=true&id_card_side=back&image=" + base64;
        String jsonResult = BaiDuOCR.request(httpUrl, httpFront);
        HashMap map = BaiDuOCR.getHashMapByJson(jsonResult);
        for (String key : map.keySet()) {
            System.out.println(key + ": " + map.get(key));
        }
    }

正面识别结果：

背面识别结果： 

百度身份证图片识别完成~~~~~