Java代码调用阿里人脸比对接口

拼搏现实的明天。 2022-03-14 10:48 203阅读 0赞

基于对阿里的信任购买了阿里的人脸比对服，结果测试了好久，个人将阿里提供的demo进行了一下修改  
阿里提供的demo：[API校验规范][API]  
不知道为什么我用他提供的这个url（ `String url = "https://shujuapi.aliyun.com/face/verify";`）无法调用接口，一直报错403，无奈，最终提交工单客服给了我另一个接口`https://dtplus-cn-shanghai.data.aliyuncs.com/face/verify`，我是真的没找到这个借口啊！！！！  
下面是我个人封装的一个人脸比对的调用，基于阿里提供的demo之上：

public class FaceUtil {
    
    	private static final String ak_id = "*****************";
    
    	private static final String ak_secret = "******************************";
    
    	private static final String url = "https://dtplus-cn-shanghai.data.aliyuncs.com/face/verify";
    
    	/*
    	 * 计算MD5+BASE64
    	 */
    	public static String MD5Base64(String s) {
    		if (s == null)
    			return null;
    		String encodeStr = "";
    		byte[] utfBytes = s.getBytes();
    		MessageDigest mdTemp;
    		try {
    			mdTemp = MessageDigest.getInstance("MD5");
    			mdTemp.update(utfBytes);
    			byte[] md5Bytes = mdTemp.digest();
    			BASE64Encoder b64Encoder = new BASE64Encoder();
    			encodeStr = b64Encoder.encode(md5Bytes);
    		} catch (Exception e) {
    			throw new Error("Failed to generate MD5 : " + e.getMessage());
    		}
    		return encodeStr;
    	}
    
    	/*
    	 * 计算 HMAC-SHA1
    	 */
    	public static String HMACSha1(String data, String key) {
    		String result;
    		try {
    			SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), "HmacSHA1");
    			Mac mac = Mac.getInstance("HmacSHA1");
    			mac.init(signingKey);
    			byte[] rawHmac = mac.doFinal(data.getBytes());
    			result = (new BASE64Encoder()).encode(rawHmac);
    		} catch (Exception e) {
    			throw new Error("Failed to generate HMAC : " + e.getMessage());
    		}
    		return result;
    	}
    
    	/*
    	 * 等同于javaScript中的 new Date().toUTCString();
    	 */
    	public static String toGMTString(Date date) {
    		SimpleDateFormat df = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss z", Locale.UK);
    		df.setTimeZone(new java.util.SimpleTimeZone(0, "GMT"));
    		return df.format(date);
    	}
    
    	/*
    	 * 发送POST请求
    	 */
    	public static String sendPost(String url1, String url2) throws Exception {
    		String body = "{\"image_url_1\": \"" + url1 + "\", \"image_url_2\":\"" + url2 + "\"}";
    		PrintWriter out = null;
    		BufferedReader in = null;
    		String result = "";
    		int statusCode = 200;
    		try {
    			URL realUrl = new URL(url);
    			/*
    			 * http header 参数
    			 */
    			String method = "POST";
    			// 返回值类型
    			String accept = "application/json";
    			// 请求内容类型
    			String content_type = "application/json";
    			String path = realUrl.getFile();
    			// GMT时间
    			String date = toGMTString(new Date());
    			// 1.对body做MD5+BASE64加密
    			String bodyMd5 = MD5Base64(body);
    			String stringToSign = method + "\n" + accept + "\n" + bodyMd5 + "\n" + content_type + "\n" + date + "\n"
    					+ path;
    			// 2.计算 HMAC-SHA1
    			String signature = HMACSha1(stringToSign, ak_secret);
    			// 3.得到 authorization header
    			String authHeader = "Dataplus " + ak_id + ":" + signature;
    			// 打开和URL之间的连接
    			URLConnection conn = realUrl.openConnection();
    			// 设置通用的请求属性
    			conn.setRequestProperty("Accept", accept);
    			conn.setRequestProperty("Content-type", content_type);
    			conn.setRequestProperty("Date", date);
    			// 认证信息
    			conn.setRequestProperty("Authorization", authHeader);
    			// 发送POST请求必须设置如下两行
    			conn.setDoOutput(true);
    			conn.setDoInput(true);
    			// 获取URLConnection对象对应的输出流
    			out = new PrintWriter(conn.getOutputStream());
    			// 发送请求参数
    			out.print(body);
    			// flush输出流的缓冲
    			out.flush();
    			// 定义BufferedReader输入流来读取URL的响应
    			statusCode = ((HttpURLConnection) conn).getResponseCode();
    			if (statusCode != 200) {
    				in = new BufferedReader(new InputStreamReader(((HttpURLConnection) conn).getErrorStream()));
    			} else {
    				in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    			}
    			String line;
    			while ((line = in.readLine()) != null) {
    				result += line;
    			}
    		} catch (Exception e) {
    			e.printStackTrace();
    		} finally {
    			try {
    				if (out != null) {
    					out.close();
    				}
    				if (in != null) {
    					in.close();
    				}
    			} catch (IOException ex) {
    				ex.printStackTrace();
    			}
    		}
    		if (statusCode != 200) {
    			throw new IOException("\nHttp StatusCode: " + statusCode + "\nErrorMessage: " + result);
    		}
    		return result;
    	}
    
    	public static void main(String[] args) throws Exception {
    		String url1 = "http://112.86.129.73:2000/upload/001.jpg";
    		String url2 = "http://112.86.129.73:2000/upload/003.jpg";
    		String response = sendPost(url1, url2);
    		JSONObject strj = new JSONObject(response);
    		System.out.println(strj.toString());
    		System.out.println(strj.getDouble("confidence"));
    	}
    }

Access\_Id和Access\_secret改成自己的，这样的话就只需要将两张图片的url放上来就可以了，返回值阿里的API文档中有解释

[API]: https://help.aliyun.com/document_detail/67818.html?spm=a2c4g.11186623.6.559.10347798jqVS1a