1.注册开发人员并查看官网API文档
网址：http://ai.baidu.com/docs
2.在管理中心创建应用及查看相关参数 AppID APIKey SecretKey都需要保存起来
3.开发测试
3.1、调用百度云人脸识别API需要两步
1、首先根据创建的应用，获取token，该token有效期为1个月。token的授权服务地址：https://aip.baidubce.com/oauth/2.0/token；
发送请求（推荐使用POST），并在URL中带上以下参数：
grant_type: 必须参数，固定为“client_credentials”；
client_id: 必须参数，应用的API Key；
client_secret: 必须参数，应用的Secret Key；
2、根据token调用api，服务地址：https://aip.baidubce.com/rest/2.0/face/v1/detect
具体实现代码如下：
package com.zmx.baiduaitest;import org.apache.http.client.methods.CloseableHttpResponse;import java.util.HashMap;import java.util.Map;/** * Created by zhangwenchao on 2017/9/29. */public class FaceAPITest { public static void main(String[] args) { // getToKenTest() ; faceDetecttest(); } //获取token public static void getToKenTest(){ //使用其测试百度云API---获取token //url: http://console.bce.baidu.com/ai String APPID ="10201***"; //管理中心获得 //百度人脸识别应用apikey String API_KEY = "WVsGWvDxyn55hW8P*******"; //管理中心获得 //百度人脸识别应用sercetkey String SERCET_KEY = "z0uSr16LGyTNIMRRnP6f8jCL*****"; //管理中心获得 //百度人脸识别token 有效期一个月 String TOKEN = null; String access_token_url = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials" +"&client_id="+API_KEY +"&client_secret="+SERCET_KEY; CloseableHttpResponse response = HttpClientUtils.doHttpsGet(access_token_url,null); System.out.println(HttpClientUtils.toString(response)); //得到token = 24.1d786b9cdbdd8ac7cf55d56c7f38372b.2592000.1509244497.282335-10201425 } //使用token调用API public static void faceDetecttest(){ String token = "24.1d786b9cdbdd8ac7cf55d56c7f38372b.2592000.1509244497.282335-10201425"; String Filepath = "E:/test.jpg"; String image = Base64ImageUtils.GetImageStrFromPath(Filepath); String url = "https://aip.baidubce.com/rest/2.0/face/v1/detect?access_token="+token; Map<String, String> headers = new HashMap<String, String>(); headers.put("Content-Type", "application/x-www-form-urlencoded"); Map<String, String> bodys = new HashMap<String, String>(); bodys.put("image", image); bodys.put("face_fields", "age,beauty,expression,gender,glasses,race,qualities"); try { CloseableHttpResponse response = HttpClientUtils.doHttpsPost(url,headers,bodys); System.out.println(HttpClientUtils.toString(response)); } catch (Exception e) { e.printStackTrace(); } }}上述用到了几个工具类如下：
HttpClientUtils.java：httpclient工具类用于发起get、post请求
package com.zmx.baiduaitest;import org.apache.http.*;import org.apache.http.client.CookieStore;import org.apache.http.client.config.AuthSchemes;import org.apache.http.client.config.CookieSpecs;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.client.protocol.HttpClientContext;import org.apache.http.config.Registry;import org.apache.http.config.RegistryBuilder;import org.apache.http.conn.socket.ConnectionSocketFactory;import org.apache.http.conn.socket.PlainConnectionSocketFactory;import org.apache.http.conn.ssl.NoopHostnameVerifier;import org.apache.http.conn.ssl.SSLConnectionSocketFactory;import org.apache.http.cookie.Cookie;import org.apache.http.impl.client.*;import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import javax.net.ssl.SSLContext;import javax.net.ssl.TrustManager;import javax.net.ssl.X509TrustManager;import java.io.IOException;import java.security.KeyManagementException;import java.security.NoSuchAlgorithmException;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.Map;/** * HttpClient4.5.X实现的工具类 * 可以实现http和ssl的get/post请求 */public class HttpClientUtils{ //创建HttpClientContext上下文 private static HttpClientContext context = HttpClientContext.create(); //请求配置 private static RequestConfig requestConfig = RequestConfig.custom() .setConnectTimeout(120000) .setSocketTimeout(60000) .setConnectionRequestTimeout(60000) .setCookieSpec(CookieSpecs.STANDARD_STRICT) .setExpectContinueEnabled(true) .setTargetPreferredAuthSchemes(Arrays.asList(AuthSchemes.NTLM, AuthSchemes.DIGEST)) .setProxyPreferredAuthSchemes(Arrays.asList(AuthSchemes.BASIC)).build(); //SSL的连接工厂 private static SSLConnectionSocketFactory socketFactory = null; //信任管理器--用于ssl连接 private static TrustManager manager = new X509TrustManager() { public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException { } public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException { } public X509Certificate[] getAcceptedIssuers() { return null; } }; //ssl请求 private static void enableSSL() { try { SSLContext sslContext = SSLContext.getInstance("TLS"); sslContext.init(null, new TrustManager[]{manager}, null); socketFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } } /** * https get请求 * @param url * @param data * @return * @throws IOException */ public static CloseableHttpResponse doHttpsGet(String url, String data){ enableSSL(); Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create() .register("http", PlainConnectionSocketFactory.INSTANCE) .register("https", socketFactory).build(); PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry); CloseableHttpClient httpClient = HttpClients.custom() .setConnectionManager(connectionManager) .setDefaultRequestConfig(requestConfig).build(); HttpGet httpGet = new HttpGet(url); CloseableHttpResponse response = null; try { response = httpClient.execute(httpGet, context); }catch (Exception e){ e.printStackTrace(); } return response; } /** * https post请求 参数为名值对 * @param url * @param headers * @param bodys * @return * @throws IOException */ public static CloseableHttpResponse doHttpsPost(String url, Map<String, String> headers, Map<String, String> bodys) { enableSSL(); Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create() .register("http", PlainConnectionSocketFactory.INSTANCE) .register("https", socketFactory).build(); PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry); CloseableHttpClient httpClient = HttpClients.custom() .setConnectionManager(connectionManager) .setDefaultRequestConfig(requestConfig).build(); HttpPost httpPost = new HttpPost(url); for (Map.Entry<String, String> e : headers.entrySet()) { httpPost.addHeader(e.getKey(), e.getValue()); } if (bodys != null) { List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>(); for (String key : bodys.keySet()) { nameValuePairList.add(new BasicNameValuePair(key, bodys.get(key))); } UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nameValuePairList, Consts.UTF_8); formEntity.setContentType("application/x-www-form-urlencoded; charset=UTF-8"); httpPost.setEntity(formEntity); } CloseableHttpResponse response = null; try { response = httpClient.execute(httpPost, context); }catch (Exception e){} return response; } /** * https post请求 参数为名值对 * @param url * @param values * @return * @throws IOException */ public static CloseableHttpResponse doHttpsPost(String url, List<NameValuePair> values) { enableSSL(); Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create() .register("http", PlainConnectionSocketFactory.INSTANCE) .register("https", socketFactory).build(); PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(socketFactoryRegistry); CloseableHttpClient httpClient = HttpClients.custom() .setConnectionManager(connectionManager) .setDefaultRequestConfig(requestConfig).build(); HttpPost httpPost = new HttpPost(url); UrlEncodedFormEntity entity = new UrlEncodedFormEntity(values, Consts.UTF_8); httpPost.setEntity(entity); CloseableHttpResponse response = null; try { response = httpClient.execute(httpPost, context); }catch (Exception e){} return response; } /** * http get * @param url * @param data * @return */ public static CloseableHttpResponse doGet(String url, String data) { CookieStore cookieStore = new BasicCookieStore(); CloseableHttpClient httpClient = HttpClientBuilder.create() .setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy()) .setRedirectStrategy(new DefaultRedirectStrategy()) .setDefaultCookieStore(cookieStore) .setDefaultRequestConfig(requestConfig).build(); HttpGet httpGet = new HttpGet(url); CloseableHttpResponse response = null; try { response = httpClient.execute(httpGet, context); }catch (Exception e){} return response; } /** * http post * * @param url * @param values * @return */ public static CloseableHttpResponse doPost(String url, List<NameValuePair> values) { CookieStore cookieStore = new BasicCookieStore(); CloseableHttpClient httpClient = HttpClientBuilder.create() .setKeepAliveStrategy(new DefaultConnectionKeepAliveStrategy()) .setRedirectStrategy(new DefaultRedirectStrategy()) .setDefaultCookieStore(cookieStore) .setDefaultRequestConfig(requestConfig).build(); HttpPost httpPost = new HttpPost(url); UrlEncodedFormEntity entity = new UrlEncodedFormEntity(values, Consts.UTF_8); httpPost.setEntity(entity); CloseableHttpResponse response = null; try { response = httpClient.execute(httpPost, context); }catch (Exception e){} return response; } /** * 直接把Response内的Entity内容转换成String * * @param httpResponse * @return */ public static String toString(CloseableHttpResponse httpResponse) { // 获取响应消息实体 String result = null; try { HttpEntity entity = httpResponse.getEntity(); if (entity != null) { result = EntityUtils.toString(entity,"UTF-8"); } }catch (Exception e){}finally { try { httpResponse.close(); } catch (IOException e) { e.printStackTrace(); } } return result; } public static void main(String[] args){ //使用其测试百度云API---获取token //url: http://console.bce.baidu.com/ai String APPID ="10201425"; //管理中心获得 //百度人脸识别应用apikey String API_KEY = "WVsGWvDxyn55hW8P0UR8shbo"; //管理中心获得 //百度人脸识别应用sercetkey String SERCET_KEY = "z0uSr16LGyTNIMRRnP6f8jCLMLXAYkIj"; //管理中心获得 //百度人脸识别token 有效期一个月 String TOKEN = null; String access_token_url = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials" +"&client_id="+API_KEY +"&client_secret="+SERCET_KEY; CloseableHttpResponse response = HttpClientUtils.doHttpsGet(access_token_url,null); System.out.println(HttpClientUtils.toString(response)); //得到token = 24.1d786b9cdbdd8ac7cf55d56c7f38372b.2592000.1509244497.282335-10201425 }}Base64ImageUtils.java:图片转换工具类，用于图片文件与base64数据格式图片进行互转
package com.zmx.baiduaitest;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.URL;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;/** * Created by zhangwenchao on 2017/9/29. * 本地或者网络图片资源转为Base64字符串 */public class Base64ImageUtils { /** * @Title: GetImageStrFromUrl * @Description: 将一张网络图片转化成Base64字符串 * @param imgURL 网络资源位置 * @return Base64字符串 */ public static String GetImageStrFromUrl(String imgURL) { byte[] data = null; try { // 创建URL URL url = new URL(imgURL); // 创建链接 HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5 * 1000); InputStream inStream = conn.getInputStream(); data = new byte[inStream.available()]; inStream.read(data); inStream.close(); } catch (IOException 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); } /** * @Title: GetImageStrFromPath * @Description: (将一张本地图片转化成Base64字符串) * @param imgPath * @return */ public static String GetImageStrFromPath(String imgPath) { InputStream in = null; byte[] data = null; // 读取图片字节数组 try { in = new FileInputStream(imgPath); data = new byte[in.available()]; in.read(data); in.close(); } catch (IOException 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); } /** * @Title: GenerateImage * @Description: base64字符串转化成图片 * @param imgStr * @param imgFilePath 图片文件名，如“E:/tmp.jpg” * @return */ public static boolean saveImage(String imgStr,String imgFilePath) { if (imgStr == null) // 图像数据为空 return false; BASE64Decoder decoder = new BASE64Decoder(); try { // Base64解码 byte[] b = decoder.decodeBuffer(imgStr); for (int i = 0; i < b.length; ++i) { if (b[i] < 0) {// 调整异常数据 b[i] += 256; } } // 生成jpeg图片 OutputStream out = new FileOutputStream(imgFilePath); out.write(b); out.flush(); out.close(); return true; } catch (Exception e) { return false; } }}3.2、人脸识别API使用方法
功能：检测人脸美丑及年龄
官网：http://ai.baidu.com/docs#FACE官网文档
请求参数：
| 是否必选 | 类型 | 说明 | |
|---|---|---|---|
| image | 是 | string | base64编码后的图片数据，图片大小不超过2M。 |
| max_face_num | 否 | uint32 | 最多处理人脸数目，默认值1 |
| face_fields | 否 | string | 包括age,beauty,expression,faceshape,gender,glasses,landmark,race,qualities信息，逗号分隔，默认只返回人脸框、概率和旋转角度。 |
URL参数：
| 参数 | 值 |
|---|---|
| access_token | 通过API Key和Secret Key获取的access_token,参考“Access Token获取” |
- Header如下：
| 参数 | 值 |
|---|---|
| Content-Type | application/x-www-form-urlencoded |
- Body中数据如下：
| 参数 | 值 |
|---|---|
| image | 图像base64编码 |
| max_face_num | 非必填，默认1 |
| face_fields | 非必填 |
3.3、返回JSON字符串内容解释
age 年龄 （目前官网还是没有说明年龄的误差范围）
beauty 美丑分数 0-100 越大值越美，如花识别年龄38 美丑评分21 表示不太合理
{ "result": [{ "expression": 0, "face_probability": 1, "glasses": 0, "location": { "height": 155, "width": 136, "left": 103, "top": 49 }, "beauty": 21.201513290405, "race": "yellow", "expression_probablity": 0.77510279417038, "rotation_angle": 9, "yaw": 2.6519072055817, "roll": 10.0813331604, "qualities": { "completeness": 0, "occlusion": { "left_eye": 0, "chin": 0, "mouth": 0, "right_cheek": 0, "left_cheek": 0, "nose": 0, "right_eye": 0 }, "blur": 0, "type": { "cartoon": 0.0060238856822252, "human": 0.99397611618042 }, "illumination": 0 }, "gender_probability": 0.93728905916214, "age": 37.866649627686, "gender": "male", "glasses_probability": 0.99999260902405, "race_probability": 0.99436098337173, "pitch": -17.080112457275 }], "result_num": 1, "log_id": 2045651588}对于其他API也是同样的方式进行调用，相信大家都可以举一反三，今天项目用到一些复杂的API可以直接使用第三方提供的API，大体调用方式都类似。