百度AI--自然语言处理之Java开发

参数：

public class APIConstants {

	//设置APPID/AK/SK
    public static final String APP_ID = "108***";
    public static final String API_KEY = "fWC*****";
    public static final String SECRET_KEY = "CP3***";
    public static final String TOKEN = "24.7f7d825858b9f66819e48f6ab212a8a7.2592000.1522835019.*********";

}

HttpUtil:

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

public class HttpUtil {
    public static String post(String requestUrl, String accessToken, String params)
            throws Exception {
        String contentType = "application/x-www-form-urlencoded";
        System.err.println("post(String requestUrl, String accessToken, String params)");
        return HttpUtil.post(requestUrl, accessToken, contentType, params);
    }

    public static String post(String requestUrl, String accessToken, String contentType, String params)
            throws Exception {
        String encoding = "UTF-8";
        if (requestUrl.contains("nlp")) {
            encoding = "GBK";
        }
        System.err.println("post(String requestUrl, String accessToken, String contentType, String params)");
        return HttpUtil.post(requestUrl, accessToken, contentType, params, encoding);
    }

    public static String post(String requestUrl, String accessToken, String contentType, String params, String encoding)
            throws Exception {
        String url = requestUrl + "?access_token=" + accessToken;
        System.err.println("post(String requestUrl, String accessToken, String contentType, String params, String encoding)");
        return HttpUtil.postGeneralUrl(url, contentType, params, encoding);
    }

    public static String postGeneralUrl(String generalUrl, String contentType, String params, String encoding)
            throws Exception {
        System.err.println("postGeneralUrl(String generalUrl, String contentType, String params, String encoding)");
        URL url = new URL(generalUrl);
        // 打开和URL之间的连接
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        // 设置通用的请求属性
        connection.setRequestProperty("Content-Type", contentType);
        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setUseCaches(false);
        connection.setDoOutput(true);
        connection.setDoInput(true);

        // 得到请求的输出流对象
        DataOutputStream out = new DataOutputStream(connection.getOutputStream());
        out.write(params.getBytes(encoding));
        out.flush();
        out.close();

        // 建立实际的连接
        connection.connect();
        // 获取所有响应头字段
        Map<String, List<String>> headers = connection.getHeaderFields();
        // 遍历所有的响应头字段
        for (String key : headers.keySet()) {
            System.err.println(key + "--->" + headers.get(key));
        }
        // 定义 BufferedReader输入流来读取URL的响应
        BufferedReader in = null;
        in = new BufferedReader(
                new InputStreamReader(connection.getInputStream(), encoding));
        String result = "";
        String getLine;
        while ((getLine = in.readLine()) != null) {
            result += getLine;
        }
        in.close();
        System.err.println("result:" + result);
        return result;
    }

}

测试：

public class Test {

    public static void main(String[] args) throws Exception {  

        String url = "https://aip.baidubce.com/rpc/2.0/nlp/v1/sentiment_classify";
        String params = "{\n" +        "    \"text\": \"苹果是一家伟大的公司\" \n" +        "}";

try { 　　HttpUtil httpUtil = new HttpUtil(); 　　String result = httpUtil.post(url, APIConstants.TOKEN, params); System.out.println(result); 　　} catch (Exception e) { 　　　　e.printStackTrace(); 　　} 

} }

获取token:

import com.huawei.hst.nps.bdAI.APIConstants;;
public class AccessToken {

    public static void main(String[] args) throws Exception {;
    String access_token_url = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials" +
            "&client_id="+APIConstants.API_KEY
           +"&client_secret="+ APIConstants.SECRET_KEY;
    //HttpResponse response = HttpUtil.post(access_token_url,new HashMap<String, String>(),new HashMap<String, String>());
    //System.out.println(EntityUtils.toString(response.getEntity()));

    }
}

资料：

连接1：http://blog.csdn.net/u010651369/article/details/64439090

连接2：http://blog.csdn.net/zmx729618/article/details/78132942

链接3：http://aixiaoshuai.mydoc.io/?t=234826

链接4：http://ai.baidu.com/tech/nlp/sentiment_classify