java调用阿里云NLP自然语言处理模型

由于SDK调用需要收费,所以采用API调用,每天有50万次免费额度,直接复制就能用

一.开通账号服务

1.百度搜索阿里巴巴自然语言处理开放平台

2.登录后页面

 

3.获取AccessKey和Secret,()找到右上角头像后点击AccessKey管理)

4.自行开通需要的版本

二.代码部分

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import sun.misc.BASE64Encoder;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.net.URI;
import java.net.URLEncoder;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;

public class TestCloud {

    static String key = "xxx"; // 你自己账号对应的AccessKey
    static String secret = "xxx"; // 你自己账号对应的secret
    static String url = "http://alinlp.cn-hangzhou.aliyuncs.com/?";

    public static void main(String[] args) throws Exception {
        //根据自己的region更换
        String sortStr = buildSortedUrl(null);
        String sign = getSign(sortStr);
        String targetUrl = url  + sortStr + "&" + "Signature=" + sign ;

        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();

        String resultString = "";
        CloseableHttpResponse response = null;
        URIBuilder builder = new URIBuilder(targetUrl);
        URI uri = builder.build();

        // 创建http GET请求
        HttpGet httpGet = new HttpGet(uri);

        // 执行请求
        response = httpclient.execute(httpGet);
        // 判断返回状态是否为200
        if (response.getStatusLine().getStatusCode() == 200) {
            resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
        }
//        JSONObject jsonObject = restTemplate.getForObject(URLDecoder.decode(targetUrl), JSONObject.class);
        System.out.println(resultString);
    }

    public static byte[] HmacSHA1Encrypt(String encryptText, String encryptKey) throws Exception {
        String MAC_NAME = "HmacSHA1";
        String ENCODING = "UTF-8";
        byte[] data=encryptKey.getBytes(ENCODING);
        //根据给定的字节数组构造一个密钥,第二参数指定一个密钥算法的名称
        SecretKey secretKey = new SecretKeySpec(data, MAC_NAME);
        //生成一个指定 Mac 算法 的 Mac 对象
        Mac mac = Mac.getInstance(MAC_NAME);
        //用给定密钥初始化 Mac 对象
        mac.init(secretKey);
        byte[] text = encryptText.getBytes(ENCODING);
        //完成 Mac 操作
        return mac.doFinal(text);
    }

    public static String encryptBASE64(byte[] key) {
        return (new BASE64Encoder()).encodeBuffer(key);
    }


    public static String getISO8601Timestamp(Date date){
        TimeZone tz = TimeZone.getTimeZone("UTC");
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        df.setTimeZone(tz);
        String nowAsISO = df.format(date);
        return nowAsISO;
    }

    public static String getSign(String sortUrl) throws Exception {
        String StringToSign = "GET&%2F&" + java.net.URLEncoder.encode(sortUrl);
        byte[] rlt = HmacSHA1Encrypt(StringToSign, secret + "&");
        String sig = encryptBASE64(rlt);
        sig = sig.replace("\r", "").replace("\n", "");
        sig = URLEncoder.encode(sig);
        return sig;
    }

    public static String buildSortedUrl(String nextPageToken){
        Map<String, String> map = new HashMap<>();
        map.put("Format","json");
        map.put("Version","2020-06-29");
        map.put("AccessKeyId",key);
        map.put("SignatureMethod","HMAC-SHA1");
        map.put("Timestamp", getISO8601Timestamp(new Date()));
        map.put("SignatureVersion", "1.0");
        map.put("SignatureNonce", UUID.randomUUID().toString().replace("-",""));
        map.put("Text", "深圳洗剪吹");
        map.put("TokenizerId", "GENERAL_CHN");
        /**
         * xxxx替换为你想要的处理方式
         * 中文分词: GetWsChGeneral
         * 词性标注: GetPosChGeneral
         * 命名实体类别: GetNerChEcom
         * 情感分析: GetSaChGeneral
         * 关键词提取: GetKeywordChEcom
         * 文本分类: GetTcChGeneral
        */
        map.put("Action", "xxxx");
        map.put("ServiceCode", "alinlp");
        List<String> sortList = new ArrayList<>();
        for (String key : map.keySet()) {
            sortList.add(key);
        }
        sortList.sort(Comparator.naturalOrder());
        String sortStr = null;
        for(String key : sortList){
            String temp = URLEncoder.encode(key) + "=" + URLEncoder.encode(map.get(key));
            if(sortStr == null){
                sortStr = temp;
            }else{
                sortStr += "&" + temp;
            }
        }
        sortStr.replace("+","%20").replace("*","%2A").replace("%7E","~");
        return sortStr;
    }

}