java通过百度AI开发平台提取身份证图片中的文字信息
废话不多说，直接上代码。。。
IdCardDemo.java
1 package com.wulss.baidubce;
2
3 import java.io.BufferedReader;
4 import java.io.InputStreamReader;
5 import java.net.HttpURLConnection;
6 import java.net.URL;
7 import java.net.URLEncoder;
8 import java.util.Map;
9
10 import com.wulss.utils.Base64Util;
11 import com.wulss.utils.FileUtil;
12 import com.wulss.utils.HttpUtil;
13
14 /**
15 *
16 * @Descript TODO (身份证图片识别 案例)
17 * @author yeting
18 * @date 2019年4月18日
19 *
20 */
21 public class IdCardDemo {
22
23 private static final String URL_IDCARD = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard";//身份证识别地址
24 private static final String URL_ACCESSTOKEN = "https://aip.baidubce.com/oauth/2.0/token?"; // 百度AI开发平台 获取token的地址
25 private static final String API_KEY = "afdH343CAt342YFT7F"; // 百度AI开发平台 获取的 API Key 更新为你注册的
26 private static final String SECRET_KEY = "js45sdfqRFF65gOd667sd1R7sdr"; // 百度AI开发平台 获取的 Secret Key 更新为你注册的
27
28 /**
29 * 获取API访问token
30 * 该token有一定的有效期，需要自行管理，当失效时需重新获取.
31 * @param ak - 百度云官网获取的 API Key
32 * @param sk - 百度云官网获取的 Securet Key
33 * @return assess_token 示例：
34 * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"
35 */
36 public static String getAccessToken() {
37 String getAccessTokenUrl = URL_ACCESSTOKEN
38 + "grant_type = client_credentials" // 1. grant_type为固定参数
39 + "&client_id = " + API_KEY // 2. 官网获取的 API Key
40 + "&client_secret = " + SECRET_KEY; // 3. 官网获取的 Secret Key
41 String accessToken = "";
42 try {
43 URL realUrl = new URL(getAccessTokenUrl);
44
45 // 打开和URL之间的连接
46 HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
47 connection.setRequestMethod("GET");
48 connection.connect();
49
50 // 获取所有响应头字段
51 // Map<String, List<String>> map = connection.getHeaderFields();
52 // 遍历所有的响应头字段
53 // for (String key : map.keySet()) {
54 // System.err.println(key + "--->" + map.get(key));
55 // }
56
57 // 定义 BufferedReader输入流来读取URL的响应
58 BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
59 String result = "";
60 String line;
61 while ((line = in.readLine()) != null) {
62 result += line;
63 }
64
65 System.err.println("result:" + result);
66
67 org.json.JSONObject jsonObject = new org.json.JSONObject(result);
68 accessToken = jsonObject.getString("access_token");
69 } catch (Exception e) {
70 System.err.printf("获取token失败！");
71 e.printStackTrace(System.err);
72 }
73 return accessToken;
74 }
75
76 /**
77 * 身份证识别请求
78 * @param side 识别身份证正面 front;识别身份证背面 back;
79 * @param filePath 图片路径
80 * @param accessToken 线上环境有过期时间， 客户端可自行缓存，过期后重新获取。
81 * @return 返回身份证号码
82 */
83 public static String requestIdCard(String side,String filePath,String accessToken) {
84 String result = "";
85
86 try {
87 //1.请求获取结果
88 String requestParams = "id_card_side = " + side
89 + "&" + URLEncoder.encode("image", "UTF-8")
90 + "=" + URLEncoder.encode(Base64Util.encode(FileUtil.readFileByBytes(filePath)), "UTF-8");
91
92 result = HttpUtil.post(URL_IDCARD, accessToken, requestParams);//返回json格式的结果
93 System.out.println(result);
94
95 // 请求返回结果eg:
96 // String result =
97 // "[{\"log_id\": 3812339812321238679, \"words_result_num\": 6,\"direction\": 2, \"image_status\": \"normal\",
98 // \"words_result\": {
99 // \"住址\":{\"location\": {\"width\": 123, \"top\": 123, \"height\": 4423, \"left\":1232}, \"words\": \"湖北省咸宁市茶叶巷\"},
100 // \"出生\": {\"location\":{\"width\": 333, \"top\": 339, \"height\": 2333, \"left\": 3333}, \"words\": \"19191010\"},
101 // \"姓名\": {\"location\": {\"width\": 133, \"top\": 309, \"height\": 303, \"left\": 2205}, \"words\": \"张三\"},
102 // \"公民身份号码\":{\"location\": {\"width\": 111, \"top\": 3333, \"height\": 3335, \"left\":333}, \"words\": \"430124191910101234\"},
103 // \"性别\": {\"location\": {\"width\":222, \"top\": 521, \"height\": 304, \"left\": 2333}, \"words\": \"男\"},
104 // \"民族\": {\"location\": {\"width\": 111, \"top\": 3333, \"height\": 22,\"left\": 1222}, \"words\": \"汉\"}
105 // }
106 // }]";
107
108 // <!-- json转换工具 依赖jar包-->
109 // <dependency>
110 // <groupId>net.sf.json-lib</groupId>
111 // <artifactId>json-lib</artifactId>
112 // <version>2.4</version>
113 // <classifier>jdk15</classifier>
114 // </dependency>
115
116 //2.解析结果
117 Map<String,String> resultMap = (Map<String,String>)net.sf.json.JSONObject
118 .toBean(net.sf.json.JSONObject.fromObject(result),Map.class);
119
120 if(resultMap.get("error_code").equals("110")) {
121 return requestIdCard(side,filePath,getAccessToken()) ;//重新请求
122 }else {
123 String words = "";
124 if(resultMap.get("image_status") != null && resultMap.get("image_status").equals("normal")) {// 正常
125 String wordsResults = resultMap.get("words_result");
126 Map<String,String> wordsResultMap = (Map<String,String>)net.sf.json.JSONObject
127 .toBean(net.sf.json.JSONObject.fromObject(wordsResults),Map.class);
128
129 String idCardNums = wordsResultMap.get("公民身份号码");
130 Map<String,String> idCardNumMap = (Map<String,String>)net.sf.json.JSONObject
131 .toBean(net.sf.json.JSONObject.fromObject(idCardNums),Map.class);
132 words = idCardNumMap.get("words");
133 }
134 return words;
135 }
136 } catch (Exception e) {
137 e.printStackTrace();
138 result = e.getMessage();
139 }
140
141 return result;
142 }
143
144
145 }FileUtil.java
1 package com.wulss.utils;
2 import java.io.*;
3
4 /**
5 * 文件读取工具类
6 */
7 public class FileUtil {
8
9 /**
10 * 读取文件内容，作为字符串返回
11 */
12 public static String readFileAsString(String filePath) throws IOException {
13 File file = new File(filePath);
14 if (!file.exists()) {
15 throw new FileNotFoundException(filePath);
16 }
17
18 if (file.length() > 1024 * 1024 * 1024) {
19 throw new IOException("File is too large");
20 }
21
22 StringBuilder sb = new StringBuilder((int) (file.length()));
23 // 创建字节输入流
24 FileInputStream fis = new FileInputStream(filePath);
25 // 创建一个长度为10240的Buffer
26 byte[] bbuf = new byte[10240];
27 // 用于保存实际读取的字节数
28 int hasRead = 0;
29 while ( (hasRead = fis.read(bbuf)) > 0 ) {
30 sb.append(new String(bbuf, 0, hasRead));
31 }
32 fis.close();
33 return sb.toString();
34 }
35
36 /**
37 * 根据文件路径读取byte[] 数组
38 */
39 public static byte[] readFileByBytes(String filePath) throws IOException {
40 File file = new File(filePath);
41 if (!file.exists()) {
42 throw new FileNotFoundException(filePath);
43 } else {
44 ByteArrayOutputStream bos = new ByteArrayOutputStream((int) file.length());
45 BufferedInputStream in = null;
46
47 try {
48 in = new BufferedInputStream(new FileInputStream(file));
49 short bufSize = 1024;
50 byte[] buffer = new byte[bufSize];
51 int len1;
52 while (-1 != (len1 = in.read(buffer, 0, bufSize))) {
53 bos.write(buffer, 0, len1);
54 }
55
56 byte[] var7 = bos.toByteArray();
57 return var7;
58 } finally {
59 try {
60 if (in != null) {
61 in.close();
62 }
63 } catch (IOException var14) {
64 var14.printStackTrace();
65 }
66
67 bos.close();
68 }
69 }
70 }
71 }Base64Util.java
1 package com.wulss.utils;
2
3
4
5 /**
6 * Base64 工具类
7 */
8 public class Base64Util {
9 private static final char[] ALPHABET;
10 private static final char last2byte;
11 private static final char last4byte;
12 private static final char last6byte;
13 private static final char lead6byte;
14 private static final char lead4byte;
15 private static final char lead2byte;
16 private static final char[] encodeTable;
17 private static int[] toInt;
18
19 static {
20 ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".toCharArray();
21 last2byte = (char)Integer.parseInt("00000011", 2);
22 last4byte = (char)Integer.parseInt("00001111", 2);
23 last6byte = (char)Integer.parseInt("00111111", 2);
24 lead6byte = (char)Integer.parseInt("11111100", 2);
25 lead4byte = (char)Integer.parseInt("11110000", 2);
26 lead2byte = (char)Integer.parseInt("11000000", 2);
27 encodeTable = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };
28 Base64Util.toInt = new int[128];
29 for (int i = 0; i < Base64Util.ALPHABET.length; ++i) {
30 Base64Util.toInt[Base64Util.ALPHABET[i]] = i;
31 }
32 }
33 public Base64Util() {
34 }
35
36 public static String encode(byte[] from) {
37 StringBuilder to = new StringBuilder((int) ((double) from.length * 1.34D) + 3);
38 int num = 0;
39 char currentByte = 0;
40
41 int i;
42 for (i = 0; i < from.length; ++i) {
43 for (num %= 8; num < 8; num += 6) {
44 switch (num) {
45 case 0:
46 currentByte = (char) (from[i] & lead6byte);
47 currentByte = (char) (currentByte >>> 2);
48 case 1:
49 case 3:
50 case 5:
51 default:
52 break;
53 case 2:
54 currentByte = (char) (from[i] & last6byte);
55 break;
56 case 4:
57 currentByte = (char) (from[i] & last4byte);
58 currentByte = (char) (currentByte << 2);
59 if (i + 1 < from.length) {
60 currentByte = (char) (currentByte | (from[i + 1] & lead2byte) >>> 6);
61 }
62 break;
63 case 6:
64 currentByte = (char) (from[i] & last2byte);
65 currentByte = (char) (currentByte << 4);
66 if (i + 1 < from.length) {
67 currentByte = (char) (currentByte | (from[i + 1] & lead4byte) >>> 4);
68 }
69 }
70
71 to.append(encodeTable[currentByte]);
72 }
73 }
74
75 if (to.length() % 4 != 0) {
76 for (i = 4 - to.length() % 4; i > 0; --i) {
77 to.append("=");
78 }
79 }
80
81 return to.toString();
82 }
83
84 public static byte[] decode(final String s) {
85 final int delta = s.endsWith("==") ? 2 : (s.endsWith("=") ? 1 : 0);
86 final byte[] buffer = new byte[s.length() * 3 / 4 - delta];
87 final int mask = 255;
88 int index = 0;
89 for (int i = 0; i < s.length(); i += 4) {
90 final int c0 = Base64Util.toInt[s.charAt(i)];
91 final int c2 = Base64Util.toInt[s.charAt(i + 1)];
92 buffer[index++] = (byte)((c0 << 2 | c2 >> 4) & mask);
93 if (index >= buffer.length) {
94 return buffer;
95 }
96 final int c3 = Base64Util.toInt[s.charAt(i + 2)];
97 buffer[index++] = (byte)((c2 << 4 | c3 >> 2) & mask);
98 if (index >= buffer.length) {
99 return buffer;
100 }
101 final int c4 = Base64Util.toInt[s.charAt(i + 3)];
102 buffer[index++] = (byte)((c3 << 6 | c4) & mask);
103 }
104 return buffer;
105 }
106 }HttpUtil.java
1 package com.wulss.utils;
2
3
4 import java.io.BufferedReader;
5 import java.io.DataOutputStream;
6 import java.io.InputStreamReader;
7 import java.net.HttpURLConnection;
8 import java.net.URL;
9 import java.util.List;
10 import java.util.Map;
11
12 /**
13 * http 工具类
14 */
15 public class HttpUtil {
16
17 public static String post(String requestUrl, String accessToken, String params)
18 throws Exception {
19 String contentType = "application/x-www-form-urlencoded";
20 return HttpUtil.post(requestUrl, accessToken, contentType, params);
21 }
22
23 public static String post(String requestUrl, String accessToken, String contentType, String params)
24 throws Exception {
25 String encoding = "UTF-8";
26 if (requestUrl.contains("nlp")) {
27 encoding = "GBK";
28 }
29 return HttpUtil.post(requestUrl, accessToken, contentType, params, encoding);
30 }
31
32 public static String post(String requestUrl, String accessToken, String contentType, String params, String encoding)
33 throws Exception {
34 String url = requestUrl + "?access_token=" + accessToken;
35 return HttpUtil.postGeneralUrl(url, contentType, params, encoding);
36 }
37
38 public static String postGeneralUrl(String generalUrl, String contentType, String params, String encoding)
39 throws Exception {
40 URL url = new URL(generalUrl);
41 // 打开和URL之间的连接
42 HttpURLConnection connection = (HttpURLConnection) url.openConnection();
43 connection.setRequestMethod("POST");
44 // 设置通用的请求属性
45 connection.setRequestProperty("Content-Type", contentType);
46 connection.setRequestProperty("Connection", "Keep-Alive");
47 connection.setUseCaches(false);
48 connection.setDoOutput(true);
49 connection.setDoInput(true);
50
51 // 得到请求的输出流对象
52 DataOutputStream out = new DataOutputStream(connection.getOutputStream());
53 out.write(params.getBytes(encoding));
54 out.flush();
55 out.close();
56
57 // 建立实际的连接
58 connection.connect();
59 // 获取所有响应头字段
60 Map<String, List<String>> headers = connection.getHeaderFields();
61 // 遍历所有的响应头字段
62 for (String key : headers.keySet()) {
63 System.err.println(key + "--->" + headers.get(key));
64 }
65 // 定义 BufferedReader输入流来读取URL的响应
66 BufferedReader in = null;
67 in = new BufferedReader(
68 new InputStreamReader(connection.getInputStream(), encoding));
69 String result = "";
70 String getLine;
71 while ((getLine = in.readLine()) != null) {
72 result += getLine;
73 }
74 in.close();
75 System.err.println("result:" + result);
76 return result;
77 }
78 }