Holen Sie sich Daten aus Datei - gepufferter Reader

Question

Ich hätte nur die ID, den Inhalt und den Hashtag und die Zeit von jedem Tweet in einer Textdatei, und ich weiß nicht, wie Infomationen in Listen von Tweet speichern, Ich habe einen Tweet erstellt Klasse wie folgt:

  public class Tweet { 
private String type; 
private String origin; 
private String tweetText; 
private String url; 
private String tweetID; 
private String tweetDate; 
private int retCount; 
private String favourit; 
private String mEntities; 
private String hashtags; 

public Tweet(String tweetID,String origin) { 
    this.tweetID = tweetID; 
    this.origin = origin; 
} 

public Tweet(String type, String origin, String tweetText, String url, String tweetID, String tweetDate, int retCount, String favourit, String mEntities, String hashtags) { 
    this.type = type; 
    this.origin = origin; 
    this.tweetText = tweetText; 
    this.url = url; 
    this.tweetID = tweetID; 
    this.tweetDate = tweetDate; 
    this.retCount = retCount; 
    this.favourit = favourit; 
    this.mEntities = mEntities; 
    this.hashtags = hashtags; 
} 




public String getType() { 
    return type; 
} 

public void setType(String type) { 
    this.type = type; 
} 

public String getOrigin() { 
    return origin; 
} 

public void setOrigin(String origin) { 
    this.origin = origin; 
} 

public String getTweetText() { 
    return tweetText; 
} 

public void setTweetText(String tweetText) { 
    this.tweetText = tweetText; 
} 

public String getUrl() { 
    return url; 
} 

public void setUrl(String url) { 
    this.url = url; 
} 

public String getTweetID() { 
    return tweetID; 
} 

public void setTweetID(String tweetID) { 
    this.tweetID = tweetID; 
} 

public String getTweetDate() { 
    return tweetDate; 
} 

public void setTweetDate(String tweetDate) { 
    this.tweetDate = tweetDate; 
} 

public int getRetCount() { 
    return retCount; 
} 

public void setRetCount(int retCount) { 
    this.retCount = retCount; 
} 

public String getFavourit() { 
    return favourit; 
} 

public void setFavourit(String favourit) { 
    this.favourit = favourit; 
} 

public String getmEntities() { 
    return mEntities; 
} 

public void setmEntities(String mEntities) { 
    this.mEntities = mEntities; 
} 

public String getHashtags() { 
    return hashtags; 
} 

public void setHashtags(String hashtags) { 
    this.hashtags = hashtags; 
} 

und meine Datendatei hat folgendes Format:

   *** 
      *** 
      Type:status 
      Origin: Here's link to listen live to our discussion of #debtceiling #politics : 
      Text: Here's link to listen live to our discussion of : 
      URL: 
      ID: 96944336150867968 
      Time: Fri Jul 29 09:05:05 CDT 2011 
      RetCount: 0 
      Favorite: false 
      MentionedEntities: 
      Hashtags: debtceiling politics 
      *** 
      *** 
      Type:status 
      Origin: Now we're talking #debtceiling w/ Dick Polman @NewsWorksWHYY @PhillyInquirer & Bill Galston @BrookingsInst @NoLabelsOrg 
      Text: Now we're talking w/ Dick Polman & Bill Galston 
      URL: 
      ID: 96943803600089088 
      Time: Fri Jul 29 09:02:58 CDT 2011 
      RetCount: 1 
      Favorite: false 
      MentionedEntities: 136337303 151106990 14495726 15161791 
      Hashtags: debtceiling 
      *** 
      *** 

ich mag diese Datei und Bestandsinformationen in Listen lesen, ich mit diesem Code beginnen, aber ich weiß nicht, wie um das zu lösen

  public static List<String> readTweets(File file) throws IOException { 
    List<String> tweets = new ArrayList<String>(); 
    //logger.info("Read tweets from {}", file.getAbsolutePath()); 
    BufferedReader reader = new BufferedReader(new FileReader(file)); 
    String line; 
    String[] fields; 
    while ((line = reader.readLine()) != null) { 
     fields = line.split(","); 
     if (fields.length > 1) 
      tweets.add(fields[1]); 
    } 
    return tweets; 
} 

Answer 1

Durch das Aussehen des Code, den Sie mit experimentiert wird, ist es das, was ich tun würde:

public static List<String> readTweets(File file) throws IOException { 
    List<String> tweets = new ArrayList<String>(); 
    List<String> lines = Files.readAllLines(file.toPath()); 
    for(int i = 0; i < lines.length(); i++){ 
     String line = lines.get(i); 
     String[] part = line.split(","); 
     if(part.length < 1) tweets.add(part[i]); 
    } 
} 

Aber, wenn ich eine Anwendung geschrieben, die rein zum Drucken der Inhalte von Tweets war in die Konsole, hier ist, wie ich es tun würde:

TweetReader.java

package Testers; 

import java.io.BufferedWriter; 
import java.io.File; 
import java.io.FileWriter; 
import java.io.IOException; 
import java.nio.file.Files; 
import java.util.ArrayList; 
import java.util.List; 

public class TweetReader { 

    public static List<Tweet> readTweets(File file) throws IOException { 
     boolean processEnd = false; 
     String type = ""; 
     String origin = ""; 
     String tweetText = ""; 
     String url = ""; 
     String tweetID = ""; 
     String tweetDate = ""; 
     int retCount = 0; 
     String favourite = ""; 
     String mEntities = ""; 
     String hashTags = ""; 
     List<Tweet> tweets = new ArrayList<Tweet>(); 
     List<String> lines = Files.readAllLines(file.toPath()); 
     for(int i = 0; i < lines.size(); i++){ 
      String line = lines.get(i); 
      line = line.trim(); 
      if(line.equals("***")){ 
       if(processEnd){ 
        Tweet tweet = new Tweet(type, origin, tweetText, url, tweetID, tweetDate, retCount, favourite, mEntities, hashTags); 
        tweets.add(tweet); 
        processEnd = false; 
       }else processEnd = true; 
      }else{ 
       if(line.contains(":")){ 
        String header = line.substring(0, line.indexOf(":")); 
        //System.out.println(header); //You can uncomment this for troubleshooting 
        if(header.equals("Type")) type = line.substring(line.length() > 5 ? 5 : line.length()); 
        else if(header.equals("Origin")) origin = line.substring(line.length() > 8 ? 8 : line.length()); 
        else if(header.equals("Text")) tweetText = line.substring(line.length() > 6 ? 6 : line.length()); 
        else if(header.equals("URL")) url = line.substring(line.length() > 5 ? 5 : line.length()); 
        else if(header.equals("ID")) tweetID = line.substring(line.length() > 4 ? 4 : line.length()); 
        else if(header.equals("Time")) tweetDate = line.substring(line.length() > 6 ? 6 : line.length()); 
        else if(header.equals("RetCount")) retCount = Integer.parseInt(line.substring(line.length() > 10 ? 10 : line.length())); 
        else if(header.equals("Favorite")) favourite = line.substring(line.length() > 11 ? 11 : line.length()); 
        else if(header.equals("MentionedEntities")) mEntities = line.substring(line.length() > 19 ? 19 : line.length()); 
        else if(header.equals("Hashtags")) hashTags = line.substring(line.length() > 10 ? 10 : line.length()); 
        else throw new IOException("Line cannot be identified as part of a tweet:" + line); 
       }else throw new IOException("Line cannot be processed:" + line); 
      } 
     } 
     return tweets; 
    } 

    public static void main(String[] args){ 
     File log = new File("log.txt"); 
     List<Tweet> tweets = new ArrayList<Tweet>(); 
     try { 
      File f = new File(".").getAbsoluteFile(); 
      File[] array = f.listFiles(); 
      for(int i = 0; i < array.length; i++){ 
       File tweet = array[i]; 
       if(tweet.isFile() && !tweet.getName().contains("log.txt") && !tweet.getName().contains(".jar")){ 
        log("Reading file: " + tweet.getAbsolutePath(), log); 
        List<Tweet> tweetlist = readTweets(tweet); 
        tweets.addAll(tweetlist); 
       } 
      } 
      System.out.println("Reading tweets now"); 
      for(int i = 0; i < tweets.size(); i++){ 
       Tweet t = tweets.get(i); 
       log("Type = " + t.getType(), log); 
       log("Origin = " + t.getOrigin(), log); 
       log("Text = " + t.getTweetText(), log); 
       log("URL = " + t.getURL(), log); 
       log("ID = " + t.getTweetID(), log); 
       log("Date = " + t.getTweetDate(), log); 
       log("Ret count = " + t.getRetCount(), log); 
       log("Favourite = " + t.getFavourite(), log); 
       log("Mentioned entities = " + t.getMentionedEntities(), log); 
       log("Hashtags = " + t.getHashtags(), log); 
       log("Tweet finished", log); 
      } 
     } catch (IOException e) { 
      log(e, log); 
     } 
     log("Finished reading tweets.", log); 
    } 

    private static void log(IOException e, File log) { 
     log(e.getMessage(), log); 
     StackTraceElement[] array = e.getStackTrace(); 
     for(int i = 0; i < array.length; i++){ 
      log("  " + array[i], log); 
     } 
    } 

    private static void log(String string, File log) { 
     try { 
      BufferedWriter writer = new BufferedWriter(new FileWriter(log, true)); 
      writer.write(string); 
      writer.newLine(); 
      writer.close(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

} 

Tweet.java

package Testers; 

public class Tweet { 
private String type; 
private String origin; 
private String tweetText; 
private String url; 
private String tweetID; 
private String tweetDate; 
private int retCount; 
private String favourit; 
private String mEntities; 
private String hashtags; 

public Tweet(String tweetID,String origin) { 
    this.tweetID = tweetID; 
    this.origin = origin; 
} 

public Tweet(String type, String origin, String tweetText, String url, String tweetID, String tweetDate, int retCount, String favourit, String mEntities, String hashtags) { 
    this.type = type; 
    this.origin = origin; 
    this.tweetText = tweetText; 
    this.url = url; 
    this.tweetID = tweetID; 
    this.tweetDate = tweetDate; 
    this.retCount = retCount; 
    this.favourit = favourit; 
    this.mEntities = mEntities; 
    this.hashtags = hashtags; 
} 




public String getType() { 
    return type; 
} 

public String getOrigin(){ 
    return origin; 
} 

public String getTweetText(){ 
    return tweetText; 
} 

public String getURL(){ 
    return url; 
} 

public String getTweetID(){ 
    return tweetID; 
} 

public String getTweetDate(){ 
    return tweetDate; 
} 

public int getRetCount(){ 
    return retCount; 
} 

public String getFavourite(){ 
    return favourit; 
} 

public String getMentionedEntities(){ 
    return mEntities; 
} 

public String getHashtags(){ 
    return hashtags; 
} 

} 

Answer 2

//global attribute 
List<Tweet> tweetList = new ArrayList<>(); 

String line = ""; 
String[] fields; 
while (line != null) { 
    line = reader.readLine(); 
    line = reader.readLine(); 
    //these two are for *** 
    for(int i = 0;i<10;i++){ 
     line = reader.readLine(); 
     tweets.add(line); 
    // these are for the other data 
    } 
    Tweet tweet = createTweetFromList(tweets); 
    tweetList.add(tweet); 
}