[移动开发]Android/Java获取百度UNIT对话API服务

获取token类
AuthService.java

package com.example.myapp.util;

import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;

/**
 * 获取token类
 */
public class AuthService {
    public static String access_token = "";

    /**
     * 获取权限token
     *
     * @return 返回示例：
     * {
     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     * "expires_in": 2592000
     * }
     */
    public static String getAuth() {
        String clientId = "此处填写官网获取的 API Key";
        String clientSecret = "此处填写官网获取的 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) {

        if (!access_token.equals("")) {
            return access_token;
        }


        // 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("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);
            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;
    }
}

获取Unit服务
UnitService.java

package com.example.myapp.util;


import com.google.gson.Gson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

/*
 * unit对话服务
 */
public class UnitService {
    /**
     * 重要提示代码中所需工具类
     * FileUtil,Base64Util,HttpUtil,GsonUtils请从
     * https://ai.baidu.com/file/658A35ABAB2D404FBF903F64D47C1F72
     * https://ai.baidu.com/file/C8D81F3301E24D2892968F09AE1AD6E2
     * https://ai.baidu.com/file/544D677F5D4E4F17B4122FBD60DB82B3
     * https://ai.baidu.com/file/470B3ACCA3FE43788B5A963BF0B625F3
     * 下载
     */
    public static String utterance(String query,String session_id,String log_id) {
        // 请求URL
        String talkUrl = "https://aip.baidubce.com/rpc/2.0/unit/service/chat";
//        String talkUrl = "https://aip.baidubce.com/rpc/2.0/unit/bot/chat";
        //请求的参数用map封装
        Map<String, Object> map = new HashMap<>();
        Map<String, Object> mapRequest = new HashMap<>();
        Map<String, Object> mapQueryInfo = new HashMap<>();
        Map<String, Object> mapClientSession = new HashMap<>();
        List<String> asrCandidatesList = new ArrayList<>();
        List<String> candidateOptionsList = new ArrayList<>();
        List<String> skillList = new ArrayList<>();
        skillList.add("1094636");
        skillList.add("1094633");
        skillList.add("1094635");
        skillList.add("1094634");
        map.put("request", mapRequest);
        /*
         *  技能唯一标识，在『我的技能』的技能列表中第一列数字即为bot_id
         */
        //map.put("bot_id", 1094636); // 技能id
        map.put("skill_ids", skillList); // 技能id
        map.put("service_id", "S51502"); // 技能id
        map.put("version", "2.0");
        map.put("session_id", session_id);
        map.put("log_id", log_id);
        /**
         *  系统自动发现不置信意图/词槽，
         *  并据此主动发起澄清确认的敏感程度。
         *  取值范围：0(关闭)、1(中敏感度)、2(高敏感度)。
         *  取值越高BOT主动发起澄清的频率就越高，建议值为1
         */
        mapRequest.put("bernard_level", 1);
        mapRequest.put("query", query);
        mapRequest.put("query_info", mapQueryInfo);
        mapRequest.put("updates", "");
        mapRequest.put("user_id", "UNIT_WEB_37819");
        mapQueryInfo.put("asr_candidates", asrCandidatesList);
        // 请求信息来源，可选值："ASR","KEYBOARD"。ASR为语音输入，KEYBOARD为键盘文本输入。针对ASR输入，UNIT平台内置了纠错机制，会尝试解决语音输入中的一些常见错误
        mapQueryInfo.put("source", "KEYBOARD");
        mapQueryInfo.put("type", "TEXT");
        String clientSession = "";
        mapClientSession.put("client_results", "");
        mapClientSession.put("candidate_options", candidateOptionsList);

        mapRequest.put("client_session", clientSession);
//        System.out.println(clientSession);

        try {
            // 请求参数

            String params = new Gson().toJson(map);
//            System.out.println(params);
            String accessToken = AuthService.getAuth();
            String result = post(talkUrl, accessToken, params);
            System.out.println(" result: " + result);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public static String post(String url, String accessToken, String param) {
        OutputStreamWriter out = null;
        BufferedReader reader = null;
        String response = "";

        //创建连接
        try {
            URL httpUrl = null; //HTTP URL类 用这个类来创建连接
            //创建URL
            httpUrl = new URL(url + "?access_token=" + accessToken);
            //建立连接
            HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setRequestProperty("connection", "keep-alive");
            conn.setUseCaches(false);//设置不要缓存
            conn.setInstanceFollowRedirects(true);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.connect();
            //POST请求
            out = new OutputStreamWriter(
                    conn.getOutputStream());
            out.write(param);
            out.flush();
            //读取响应
            reader = new BufferedReader(new InputStreamReader(
                    conn.getInputStream()));
            String lines;
            while ((lines = reader.readLine()) != null) {
                lines = new String(lines.getBytes(), "utf-8");
                response += lines;
            }
            reader.close();
            // 断开连接
            conn.disconnect();

        } 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 (reader != null) {
                    reader.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }

        return response;
    }


}

字符解析工具
StringUtils.java

package com.example.myapp.util;

public class StringUtils {
    public static boolean isEmpty(String str){
        if(str == null || str.length()<=0){
            return true;
        }else{
            return false;
        }
    }
}

AppConfig.java

package com.example.myapp.util;

public class AppConfig {
    public static final String BASE_URl = "http://192.168.31.32:8080/renren-fast";
}

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