前面章节已经介绍使用code换取Token的整个流程了，这里不再重复阐述了，下面我们获取到用户token以后如何帮用户自动关注别人。需要参数关注者的用户ID（token授权用户）以及关注的目标用户ID。用户ID如何获取可以看上一章节获取用户信息里面就有用户ID参数。
1.引入相关依赖Maven
<dependency><groupId>oauth.signpost</groupId><artifactId>signpost-core</artifactId><version>1.2.1.2</version>
</dependency><dependency><groupId>oauth.signpost</groupId><artifactId>signpost-commonshttp4</artifactId><version>1.2.1.2</version>
</dependency><dependency><groupId>com.twitter</groupId><artifactId>twitter-api-java-sdk</artifactId><version>1.1.4</version>
</dependency><dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.1</version>
</dependency><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>29.0-jre</version>
</dependency>
2.相关的配置类
/*** 推特相关配置*/
public class TwitterConfig {/*** 客户id和客户私钥*/public static final String CLIENT_ID = "c3dqY111tjbnFPNDM6MTpjaQ";public static final String CLIENT_SECRET = "kf1119fmdeXZHpOV-fjv9umx55ZdccCkNONjea";/*** 应用KYE和私钥*/public static final String CONSUMER_KEY = "lhyfiD111MffGeHMR";public static final String CONSUMER_SECRET = "BRNxnV5Lx111jtptduIkcwjB";/*** 应用的TOKEN*/public static final String ACCESS_TOKEN = "14821111633-A8xyN5111FgkbStu";public static final String ACCESS_TOKEN_SECRET = "oZaKBphpoo111SZvzoXPAQ";}@Data
@Accessors(chain = true)
public class AttentionDto {/*** true 表示关注成功 false 表示关注失败（目标用户没有公开推文的情况，因为他们必须批准关注者请求）*/private Boolean following;/*** 指示目标用户是否需要批准关注请求。请注意，只有当目标用户批准传入的关注者请求时，经过身份验证的用户才会关注目标用户 false就是正常的*/private Boolean pending_follow;} /*** 用户关注* @param token 授权换取的用户token* @param userId 用户自己的ID* @return* @throws Exception*/public AttentionDto attention(String token, String userId) throws Exception {String urlAdress = "https://api.twitter.com/2/users/" + userId + "/following";URL url12 = new URL(urlAdress);HttpURLConnection connection = (HttpURLConnection) url12.openConnection();connection.setRequestMethod("POST");connection.setRequestProperty("Content-Type", "application/json");connection.setRequestProperty("Authorization", "Bearer " + token);JSONObject requestBody = new JSONObject();//需要关注的用户IDrequestBody.put("target_user_id", "148294855969111111");String requestBodyString = requestBody.toString();connection.setDoOutput(true);OutputStream outputStream = connection.getOutputStream();outputStream.write(requestBodyString.getBytes());outputStream.flush();outputStream.close();int responseCode = connection.getResponseCode();InputStream inputStream;if (responseCode >= 200 && responseCode < 400) {inputStream = connection.getInputStream();} else {inputStream = connection.getErrorStream();}BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));String line;StringBuilder responseBuilder = new StringBuilder();while ((line = reader.readLine()) != null) {responseBuilder.append(line);}reader.close();String response = responseBuilder.toString();if(JSON.parseObject(response).get("data") != null){JSONObject json = JSON.parseObject(JSON.parseObject(response).get("data").toString());AttentionDto attentionDto = new AttentionDto();Object ret = json.get("following");attentionDto.setFollowing(Boolean.parseBoolean(ret == null ? "false" : ret.toString()));ret = json.get("pending_follow");attentionDto.setPending_follow(Boolean.parseBoolean(ret == null ? "false" : ret.toString()));return attentionDto;}return null;}
)
)