Question

所以我一直试图找到一种方法来保存文件的“长”值。我正在使用Twitter4j包。当我得到一个关注者ID列表时，它会将它们保存为一个长变量。我可以对值进行系统输出打印，但我无法将其写入文件。我会在代码中显示它。

//First of course I put all this stuff in. This is not the Problem though.
String consumerKey = "************"; 
String consumerSecret = "**************";
String accessToken = "*******************************";
String accessTokenSecret = "*****************";
TwitterFactory twitterFactory = new TwitterFactory();
Twitter twitter = twitterFactory.getInstance();
twitter.setOAuthConsumer(consumerKey, consumerSecret);
twitter.setOAuthAccessToken(new AccessToken(accessToken, accessTokenSecret));

//Then add the cursor value and call the command
long cursor = -1;                
IDs ids = twitter.getFollowersIDs("username_foo",cursor);

//If I want to the next cursor value
System.out.print(ids.getNextCursor());

//It works to do a system out print of the IDs
for (long id : ids.getIDs()) {System.out.println(id);}

//So how do I write it into a file? This sure don't work.
file.write(getIDs());

万一你想知道，我正在使用FileOutputStream和DataOutputSream。

Answer 1

要将其顺式写入纯文本文件，请使用BufferedWriter并写下每行的值，如下所示：

File outputFile = new File("/path/to/file.txt");
Writer writer = new BufferedWriter(
                new OutputStreamWriter(
                new FileOutputStream(outputFile), "UTF-8"));
for (long id : ids.getIDs()) {
    writer.write(id + "\n");
}
writer.close();

（相比之下DataOutputStream不会给你一种人类可读的格式。）

Answer 2

假设＆＃39;文件＆＃39;是你的DataOutputStream：

for (long id : ids.getIDs()) file.writeLong(id);

如何将Java long值保存到文件？

2 个答案: