我已经实现了Table()函数,以便保存应用程序生成的结果。但是,应用程序中的Timer函数似乎会导致应用程序在每次运行时都覆盖现有的CSV文件。我想将最新的搜索结果附加到现有的CSV文件,而不是覆盖现有的CSV文件。有没有办法做到这一点?如果结果以不同的格式(如JSON)存储,是否更容易追加结果?
Timer timer;
import java.util.List;
Table table;
long lastID = Long.MAX_VALUE;
void setup() {
timer = new Timer(30000);
timer.start();
goTwitter();
table = new Table();
table.addColumn("id");
table.addColumn("latitude");
table.addColumn("longitude");
}
void draw(){
if (timer.isFinished()){
goTwitter();
timer.start();
}
}
void goTwitter(){
ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setOAuthConsumerKey("");
cb.setOAuthConsumerSecret("");
cb.setOAuthAccessToken("");
cb.setOAuthAccessTokenSecret("");
Twitter twitter = new TwitterFactory(cb.build()).getInstance();
Query query = new Query("#love");
int numberOfTweets = 300;
ArrayList<Status> tweets = new ArrayList<Status>();
while (tweets.size () < numberOfTweets) {
if (numberOfTweets - tweets.size() > 100)
query.setCount(100);
else
query.setCount(numberOfTweets - tweets.size());
//long lastID = Long.MAX_VALUE;
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.setSinceId(lastID);
}
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);
TableRow newRow = table.addRow();
newRow.setString("id", user);
newRow.setDouble("latitude", lat);
newRow.setDouble("longitude", lon);
saveTable(table, "data2/syria_16500_5.csv");
}
}
println("lastID= " + lastID);
}
class Timer {
int savedTime;
int totalTime;
Timer (int tempTotalTime) {
totalTime = tempTotalTime;
}
void start(){
savedTime = millis();
}
boolean isFinished() {
int passedTime = millis() - savedTime;
if (passedTime > totalTime){
return true;
} else {
return false;
}
}
}
答案 0 :(得分:1)
好吧,似乎没有直接实现附加到表,所以你将不得不诉诸一个hack:在处理中加载表,写入并重新保存它,有点像这样: / p>
processing.data.Table table;
void setup() {
File f = new File(sketchPath("") + "data2/syria_16500_5.csv");
println(f.getAbsolutePath());
if (!f.exists()) {
table = new processing.data.Table();
table.addColumn("id");
table.addColumn("latitude");
table.addColumn("longitude");
}
else
table = loadTable("data2/syria_16500_5.csv", "header, csv");
TableRow newRow = table.addRow();
newRow.setString("id", "asad");
newRow.setDouble("latitude", 234);
newRow.setDouble("longitude", 2523);
saveTable(table, "data2/syria_16500_5.csv");
}
草图首先检查文件是否存在。如果没有,则会创建一个新表,否则会使用其标头加载旧表。 请注意,这不是特别安全......如果您更改列(例如,在文本编辑器中)并尝试再次运行草图,您将获得异常。