如何使用Twitter4j检索超过100个结果

Question

我正在使用Twitter4j库来检索推文,但是我的目的并不足够.目前,我从一个页面获得最多100个.如何在Processing中将maxId和sinceId实现为以下代码,以便从Twitter搜索API中检索超过100个结果？我对Processing(以及一般的编程)完全不熟悉,所以对此的任何方向都会很棒!谢谢!

void setup() {

  ConfigurationBuilder cb = new ConfigurationBuilder();
  cb.setOAuthConsumerKey("xxxx");
  cb.setOAuthConsumerSecret("xxxx");
  cb.setOAuthAccessToken("xxxx");
  cb.setOAuthAccessTokenSecret("xxxx");

  Twitter twitter = new TwitterFactory(cb.build()).getInstance();
  Query query = new Query("#peace");
  query.setCount(100);

  try {
    QueryResult result = twitter.search(query);
    ArrayList tweets = (ArrayList) result.getTweets();

    for (int i = 0; i < tweets.size(); i++) {
      Status t = (Status) tweets.get(i);

      GeoLocation loc = t.getGeoLocation();

      if (loc!=null) {
        tweets.get(i++);

        String user = t.getUser().getScreenName();
        String msg = t.getText();

        Double lat = t.getGeoLocation().getLatitude();
        Double lon = t.getGeoLocation().getLongitude();

        println("USER: " + user + " wrote: " + msg + " located at " + lat + ", " + lon);

      }
    }
  }

  catch (TwitterException te) {
    println("Couldn't connect: " + te);
  };
}

void draw() {
}

Answer 1

不幸的是你不能,至少不能直接这样做

query.setCount(101);

正如javadoc所说,它只允许最多100条推文.

为了克服这个问题,您只需要批量询问它们,并且在每个批次设置中,您获得的最大ID比最后一个ID低1.为了将它包装起来,你将每个推文从进程收集到一个ArrayList(顺便说一句,它不应该保持通用,但是它的类型定义为ArrayList<Status>- 一个携带Status对象的ArrayList),然后打印所有内容!这是一个实现:

void setup() {

  ConfigurationBuilder cb = new ConfigurationBuilder();
  cb.setOAuthConsumerKey("xxxx");
  cb.setOAuthConsumerSecret("xxxx");
  cb.setOAuthAccessToken("xxxx");
  cb.setOAuthAccessTokenSecret("xxxx");

  Twitter twitter = new TwitterFactory(cb.build()).getInstance();
  Query query = new Query("#peace");
  int numberOfTweets = 512;
  long lastID = Long.MAX_VALUE;
  ArrayList<Status> tweets = new ArrayList<Status>();
  while (tweets.size () < numberOfTweets) {
    if (numberOfTweets - tweets.size() > 100)
      query.setCount(100);
    else 
      query.setCount(numberOfTweets - tweets.size());
    try {
      QueryResult result = twitter.search(query);
      tweets.addAll(result.getTweets());
      println("Gathered " + tweets.size() + " tweets");
      for (Status t: tweets) 
        if(t.getId() < lastID) lastID = t.getId();

    }

    catch (TwitterException te) {
      println("Couldn't connect: " + te);
    }; 
    query.setMaxId(lastID-1);
  }

  for (int i = 0; i < tweets.size(); i++) {
    Status t = (Status) tweets.get(i);

    GeoLocation loc = t.getGeoLocation();

    String user = t.getUser().getScreenName();
    String msg = t.getText();
    String time = "";
    if (loc!=null) {
      Double lat = t.getGeoLocation().getLatitude();
      Double lon = t.getGeoLocation().getLongitude();
      println(i + " USER: " + user + " wrote: " + msg + " located at " + lat + ", " + lon);
    } 
    else 
      println(i + " USER: " + user + " wrote: " + msg);
  }
}

注意:该行

ArrayList<Status> tweets = new ArrayList<Status>();

应该是:

List<Status> tweets = new ArrayList<Status>();

因为如果要添加其他实现,应始终使用该接口.当然,如果你在Processing 2.x上,那么在开始时需要这个:

import java.util.List;