代码如下：
这里调用的图像识别接口是百度ai-细粒度图像识别；
识别后对植物详细介绍的接口为欧拉蜜-百科。
图像识别支持植物、动物、车型等识别，这里以植物识别为例。
需要识别的图片的限制：图像数据，base64编码，要求base64编码后大小不超过4M，最短边至少15px，最长边最大4096px,支持jpg/png/bmp格式。
识别图为：
运行结果为：
名称:绿萝产地:原产中美、南美的热带雨林地区。现国内各地上海、江苏、福建、台湾、广东、广西等地均有人工园林居室养植。门:被子植物门生活型:藤本植物界:植物界种:绿萝目:泽泻目习性:绿萝属阴性植物，忌阳光直射，喜散射光，较耐阴。室内栽培可置窗旁，但要避免阳光直射。阳光过强会灼伤绿萝的叶片，过阴会使叶面上美丽的斑纹消失，通常以接受四小时的散射光，绿萝的生长发育最好。土壤:在一般环境下均能生长，性喜温暖、潮湿环境，要求土壤疏松、肥沃、排水良好科:天南星科纲:单子叶植物纲分布:原产中美、南美的热带雨林地区。现国内各地上海、江苏、福建、台湾、广东、广西等地均有人工园林居室养植。属:绿萝属域:真核域大型常绿藤本植物。生长于热带地区常攀援生长在雨林的岩石和树干上，可长成巨大的藤本植物。绿色的叶片上有黄色的斑块。其缠绕性强，气根发达，既可让其攀附于用棕扎成的圆柱上，摆于门厅、宾馆，也可培养成悬垂状置于书房、窗台，是一种较适合室内摆放的花卉。
1、ImageRec.java
package imageRecognition;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.PrintWriter;import .URL;import .URLConnection;import .URLEncoder;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;public class ImageRec {public static byte[] getImageByte(String imgFile) {InputStream inputStream = null;byte[] data = null;try {inputStream = new FileInputStream(imgFile);data = new byte[inputStream.available()];inputStream.read(data);inputStream.close();} catch (IOException e) {e.printStackTrace();}return data;}public static String plant() {String url = "/rest/2.0/image-classify/v1/plant";try {// 本地文件路径String filePath = "D:\\test.jpg";byte[] imgData = getImageByte(filePath);String imgStr = Base64Util.encode(imgData);String imgParam = URLEncoder.encode(imgStr, "UTF-8");String param = "image=" + imgParam;// 注意这里仅为了简化编码每一次请求都去获取access_token，线上环境access_token有过期时间， 客户端可自行缓存，过期后重新获取。String accessToken = AuthService.getAuth();String resultStr = sendPost(url+"?access_token="+accessToken, param); JSONObject jsobj = JSONObject.parseObject(resultStr);JSONArray jsary = jsobj.getJSONArray("result");String name = jsary.getJSONObject(0).getString("name"); return getIntroduce(name);} catch (Exception e) {e.printStackTrace();}return "fail";}public static String getIntroduce(String keyword){return new NLIProcess().parse("介绍"+keyword);}public static String sendPost(String url, String param) {PrintWriter out = null;BufferedReader in = null;String result = "";try {URL realUrl = new URL(url);// 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", "*/*");conn.setRequestProperty("connection", "Keep-Alive");conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");// 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(param);// flush输出流的缓冲out.flush();// 定义BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(conn.getInputStream()));String line;while ((line = in.readLine()) != null) {result += line;}} catch (Exception e) {System.out.println("发送 POST 请求出现异常！" + e);e.printStackTrace();}// 使用finally块来关闭输出流、输入流finally {try {if (out != null) {out.close();}if (in != null) {in.close();}} catch (IOException ex) {ex.printStackTrace();}}return result;}public static void main(String[] args) {// TODO Auto-generated method stubSystem.out.println(plant());}}
2、NLIProcess.java (调用欧拉蜜接口介绍植物)
package imageRecognition;import java.io.UnsupportedEncodingException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.ArrayList;import java.util.Calendar;import java.util.List;import org.apache.http.HttpEntity;import org.apache.http.NameValuePair;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONException;import com.alibaba.fastjson.JSONObject;public class NLIProcess {private static final String url = "https://cn.olami.ai/cloudservice/api";private static final String Appkey = "7aa0153fd3cc422abbccfe4d3f9efdb5";private static final String Appsecret = "bc2f7fd436464b089be1548083765851";private static final String api = "nli"; public JSONObject process (String input) {JSONObject NLIresult = new JSONObject();List<NameValuePair> params = new ArrayList<NameValuePair>();params.add(new BasicNameValuePair("appkey", Appkey));params.add(new BasicNameValuePair("api", api));long timestamp = Calendar.getInstance().getTimeInMillis();params.add(new BasicNameValuePair("timestamp", String.valueOf(timestamp)));params.add(new BasicNameValuePair("sign", generateSign(timestamp)));JSONObject request = new JSONObject();JSONObject data = new JSONObject();try {data.put("input_type", 0);data.put("text", input);request.put("data_type", "stt");request.put("data", data);} catch (JSONException e1) {e1.printStackTrace();return NLIresult;}params.add(new BasicNameValuePair("rq", request.toString()));params.add(new BasicNameValuePair("cusid", "asdfghj"));CloseableHttpClient httpclient = HttpClients.createDefault();HttpPost httppost = new HttpPost(url);try {httppost.setEntity(new UrlEncodedFormEntity(params, "UTF-8"));CloseableHttpResponse response = httpclient.execute(httppost);try {HttpEntity entity = response.getEntity();if (entity != null) {String contnt = EntityUtils.toString(entity);NLIresult = JSONObject.parseObject(contnt);}} finally {response.close();}} catch (Exception e) {e.printStackTrace();return NLIresult;} finally {try {httpclient.close();} catch (Exception e) {e.printStackTrace();}}return NLIresult;}private String generateSign(long timestamp) {String sign = Appsecret + "api=" + api + "appkey=" + Appkey + "timestamp=" + timestamp + Appsecret;return MD5String(sign);}public String MD5String(String str) {try {MessageDigest msgDigest = MessageDigest.getInstance("MD5");msgDigest.reset();msgDigest.update(str.getBytes("UTF-8"));byte[] byteArrary = msgDigest.digest();StringBuffer md5StrBuff = new StringBuffer();for (int i = 0; i < byteArrary.length; i++) {String tmp = Integer.toHexString(0xFF & byteArrary[i]);if (tmp.length() == 1) {md5StrBuff.append(0).append(tmp);} else {md5StrBuff.append(tmp);}}return md5StrBuff.toString();} catch (NoSuchAlgorithmException e) {e.printStackTrace();return null;} catch (UnsupportedEncodingException e) {e.printStackTrace();return null;}} public String parse(String input) {JSONObject semantic = process(input);if (semantic == null || !"ok".equalsIgnoreCase(semantic.getString("status"))) return "";JSONObject data = semantic.getJSONObject("data");JSONArray s_list = data.getJSONArray("nli");JSONObject s_first = s_list.getJSONObject(0);JSONObject data_obj = s_first.getJSONArray("data_obj").getJSONObject(0);String description = data_obj.getString("description");List<Object> field_name = data_obj.getJSONArray("field_name");List<Object> field_value = data_obj.getJSONArray("field_value");StringBuffer str = new StringBuffer();for(int i = 0; i<field_name.size(); i++){str.append(field_name.get(i) + ":" + field_value.get(i) + "\n"); }str.append(description);return str.toString();}}
3、Base64Util.java (base64编码)
package imageRecognition;public class Base64Util {private static final char last2byte = (char) Integer.parseInt("00000011", 2);private static final char last4byte = (char) Integer.parseInt("00001111", 2);private static final char last6byte = (char) Integer.parseInt("00111111", 2);private static final char lead6byte = (char) Integer.parseInt("11111100", 2);private static final char lead4byte = (char) Integer.parseInt("11110000", 2);private static final char lead2byte = (char) Integer.parseInt("11000000", 2);private static final char[] 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', '+', '/' };public static String encode(byte[] from) {StringBuilder to = new StringBuilder((int) (from.length * 1.34) + 3);int num = 0;char currentByte = 0;for (int i = 0; i < from.length; i++) {num = num % 8;while (num < 8) {switch (num) {case 0:currentByte = (char) (from[i] & lead6byte);currentByte = (char) (currentByte >>> 2);break;case 2:currentByte = (char) (from[i] & last6byte);break;case 4:currentByte = (char) (from[i] & last4byte);currentByte = (char) (currentByte << 2);if ((i + 1) < from.length) {currentByte |= (from[i + 1] & lead2byte) >>> 6;}break;case 6:currentByte = (char) (from[i] & last2byte);currentByte = (char) (currentByte << 4);if ((i + 1) < from.length) {currentByte |= (from[i + 1] & lead4byte) >>> 4;}break;default:break;}to.append(encodeTable[currentByte]);num += 6;}}if (to.length() % 4 != 0) {for (int i = 4 - to.length() % 4; i > 0; i--) {to.append("=");}}return to.toString();}}
4、AuthService.java (获取token)
package imageRecognition;import org.json.JSONObject;import java.io.BufferedReader;import java.io.InputStreamReader;import .HttpURLConnection;import .URL;import java.util.List;import java.util.Map;/*** 获取token类*/public class AuthService {public static String getAuth() {// 官网获取的 API Key 更新为你注册的String clientId = "G3MCKHWKpDhVANcTSyhqqbHa";// 官网获取的 Secret Key 更新为你注册的String clientSecret = "OgoWRHPtfcGdoHBGLWV5TcsQzh5DWS4C";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 - 百度云官网获取的 API Key* @param sk - 百度云官网获取的 Securet Key* @return assess_token 示例：* "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"*/public static String getAuth(String ak, String sk) {// 获取token地址String authHost = "/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("GET");connection.connect();// 获取所有响应头字段Map<String, List<String>> map = connection.getHeaderFields();// 遍历所有的响应头字段for (String key : map.keySet()) {System.err.println(key + "--->" + map.get(key));}// 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;}/*** 返回结果示例*/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;}}
