Question

我正在使用Twitter4j库检索推文，但我的目的并不足够。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，比如做

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少1。为了解决这个问题，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：行

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

应该是：

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

因为你should always use the interface in case you want to add a different implementation。当然，如果你在Processing 2.x上，那么在开始时需要这个：

import java.util.List;

Answer 2

这是我根据过去的答案为我的应用做的功能。谢谢大家的解决方案。

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

void getTweets(String term)
{
int wantedTweets = 112;
long lastSearchID = Long.MAX_VALUE;
int remainingTweets = wantedTweets;
Query query = new Query(term);
 try
{ 

  while(remainingTweets > 0)
  {
    remainingTweets = wantedTweets - tweets.size();
    if(remainingTweets > 100)
    {
      query.count(100);
    }
    else
    {
     query.count(remainingTweets); 
    }
    QueryResult result = twitter.search(query);
    tweets.addAll(result.getTweets());
    Status s = tweets.get(tweets.size()-1);
    firstQueryID = s.getId();
    query.setMaxId(firstQueryID);
    remainingTweets = wantedTweets - tweets.size();
  }

  println("tweets.size() "+tweets.size() );
}
catch(TwitterException te)
{
  System.out.println("Failed to search tweets: " + te.getMessage());
  System.exit(-1);
}
}

Answer 3

只需跟踪最低Status个ID，然后使用该ID为后续max_id次来电设置search。这将允许您一次退回结果100，直到您已经足够，例如：

boolean finished = false;
while (!finished) {
    final QueryResult result = twitter.search(query);    

    final List<Status> statuses = result.getTweets();
    long lowestStatusId = Long.MAX_VALUE;
    for (Status status : statuses) {
        // do your processing here and work out if you are 'finished' etc... 

        // Capture the lowest (earliest) Status id
        lowestStatusId = Math.min(status.getId(), lowestStatusId);
    }

    // Subtracting one here because 'max_id' is inclusive
    query.setMaxId(lowestStatusId - 1);
}

有关详细信息，请参阅有关Working with Timelines的Twitter指南。

如何使用Twitter4j检索超过100个结果

3 个答案: