第三方登录（Facebook） java验证

https://developers.facebook.com/docs/facebook-login/overview    官方文档

facebook登录验证与微信一样

import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.nio.charset.Charset;import java.nio.charset.StandardCharsets;import java.util.Map;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpUriRequest;import org.apache.http.entity.ContentType;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClientBuilder;import org.apache.http.util.EntityUtils;import org.json.JSONObject;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class FacebookAuthService{private static final Logger logger = LoggerFactory.getLogger(FacebookAuthService.class);public static final String FB_AUTH_LOGIN_URL = "https://graph.facebook.com/oauth/access_token";public static final String FB_USERINFO_URL = "https://graph.facebook.com/me";//appid和appSecret 是facebook上申请//AppIdpublic static final String FB_APP_ID = "15751398427*****";//AppSecretpublic static final String FB_APP_KEY = "ac6fb2cda5d855fc20920289a4d*****";//获取用户的那些信息public static final String FB_USER_FIELDS = "id,cover,email,gender,name,languages,timezone,third_party_id,updated_time";public UserInfoData checkLoginWithToken(String accessToken) {try {String userUrl = String.format("%s?access_token=%s&fields=%s",FB_USERINFO_URL, accessToken, FB_USER_FIELDS);String userRet = httpClient.get(userUrl);UserInfoData userInfoData = new UserInfoData();JSONObject json = new JSONObject(userRet);String email = json.optString("email");if (email != null) {email = email.replace("\\u0040", "@");}userInfoData.setLoginId(json.getString("id"));userInfoData.setGender(json.optString("gender"));userInfoData.setIcon(json.optString("cover"));userInfoData.setEmail(email);userInfoData.setName(json.optString("name"));userInfoData.setOpenId(json.optString("third_party_id"));userInfoData.setAuthToken(accessToken);return userInfoData;} catch (Exception ex) {logger.warn("verify the access token failed: {}", ex.getMessage());return null;}}public static String get(String url) {String body = null;try (CloseableHttpClient httpClient = HttpClientBuilder.create().build()) {logger.info("create httppost:" + url);HttpGet get = new HttpGet(url);get.addHeader("Accept-Charset","utf-8");HttpResponse response = sendRequest(httpClient, get);body = parseResponse(response);} catch (IOException e) {logger.error("send post request failed: {}", e.getMessage());}return body;}private static String paramsToString(Map<String, String> params) {StringBuilder sb = new StringBuilder();try{for (String key : params.keySet()) {sb.append(String.format("&%s=%s", key, URLEncoder.encode(params.get(key),StandardCharsets.UTF_8.toString())));}}catch(UnsupportedEncodingException e){logger.warn("{}: encode url parameters failed", e.getMessage());}return sb.length() > 0 ? "?".concat(sb.substring(1)) : "";}private static HttpResponse sendRequest(CloseableHttpClient httpclient, HttpUriRequest httpost)throws ClientProtocolException, IOException {HttpResponse response = null;response = httpclient.execute(httpost);return response;}private static String parseResponse(HttpResponse response) {logger.info("get response from http server..");HttpEntity entity = response.getEntity();logger.info("response status: " + response.getStatusLine());Charset charset = ContentType.getOrDefault(entity).getCharset();if (charset != null) {logger.info(charset.name());}String body = null;try {body = EntityUtils.toString(entity, "utf-8");logger.info("body " + body);} catch (IOException e) {logger.warn("{}: cannot parse the entity", e.getMessage());}return body;}}