因项目需要，需要对身份证进行拍照或者扫描，获取到所有相关信息，现就对百度云的OCR技术做个小demo，复制完代码直接可以运行，简单方便，也可以根据自己项目需求做更改！
第一步还是导入相关依赖：
<!--百度文字识别接口-->
<dependency>
<groupId>com.baidu.aip</groupId>
<artifactId>java-sdk</artifactId>
<version>4.3.2</version>
</dependency>
/**
* 百度文字识别demo
* 1.获取access_token
*/
public class BaiDuOcr {
/**
* 获取权限token
* @return 返回示例：
* {
* "access_token": "24.c9303e47f0729c40f2bc2be6f8f3d589.2592000.1530936208.282335-1234567",
* "expires_in":2592000
* }
*/
public static String getAuth() {
// 官网获取的 API Key
String clientId = "API Key";
// 官网获取的 Secret Key
String clientSecret = "Secret Key";
return getAuth(clientId, clientSecret);
}
/**
*
* 获取API访问token
* 该token有一定的有效期，需要自行管理，当失效时需重新获取.
* @param ak - 百度云的 API Key
* @param sk - 百度云的 Securet Key
* @return assess_token 示例：
* "24.c9303e47f0729c40f2bc2be6f8f3d589.2592000.1530936208.282335-1234567"
*
*/
@SuppressWarnings("unused")
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();
connection.setRequestMethod("POST");//百度推荐使用POST请求
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> 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.err.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;
}
/*public static void main(String[] args) {
System.out.println(getAuth());
}*/
}
/**
* 2.将本地图片进行Base64位编码
*
* @param imgUrl
* 图片的url路径，如e:\\123.png
* @return
*/
public class BASE64 {
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 {
FileInputStream in = new FileInputStream(imageFile);
int count=0;
while(count==0){
count=in.available();//InputStream类的available()方法:读取数据
}
data = new byte[count];
in.read(data);
in.close();
} catch (Exception e) {
e.printStackTrace();
}
// 对字节数组Base64编码
BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(data);// 返回Base64编码过的字节数组字符串
}
}
/**
* 3.文字识别
* 身份证识别
* @author zl
* @date 2018/08/30
*
*/
public class RequestIdentityCard {
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",API Key);
//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;
}
/**
* 4.获取到的结果是json格式，于是我把他转换成了HashMap
* @param jsonResult
* @return
*/
@SuppressWarnings("unchecked")
public static HashMap<String,String> getHashMapByJson(String jsonResult){
@SuppressWarnings("rawtypes")
HashMap map = new HashMap<String,String>();
try {
JSONObject jsonObject = new JSONObject(jsonResult);
JSONObject words_result= jsonObject.getJSONObject("words_result");
Iterator<String> it = words_result.keys();
while (it.hasNext()){
String key = it.next();
// System.out.println("1111"+key);
JSONObject result = words_result.getJSONObject(key);
String value=result.getString("words");
switch (key){
case "姓名":
map.put("name",value);
break;
case "民族":
map.put("nation",value);
break;
case "住址":
map.put("address",value);
break;
case "公民身份号码":
map.put("IDCard",value);
break;
case "出生":
map.put("Birth",value);
break;
case "性别":
map.put("sex",value);
break;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return map;
}
public static void main(String[] args) {
//获取本地的绝对路径图片
File file = new File("d:/pohoto/123.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();
String httpArg = "detect_direction=true&id_card_side=front&image="+imageBase;
String jsonResult = request(httpUrl, httpArg);
System.out.println("返回的结果--------->"+jsonResult);
HashMap<String, String> map = getHashMapByJson(jsonResult);
Collection<String> values=map.values();
Iterator<String> iterator2=values.iterator();
while (iterator2.hasNext()){
System.out.print(iterator2.next()+", ");
}
}
}