java - 从文件读取时省略所有空行

Question

这个问题已经有答案了:

Checking if a string is empty or null in Java [duplicate] (5 个回答)

已关闭 3 年前。

我目前正在尝试获取大文本并逐句分割文本。我有代码将文本分割成单独的句子，但它当然也包括空格。我需要在代码中添加什么才能使其省略句子数组中的空格？

    String [] sentence
    ArrayList <String> sentenceList = new ArrayList <String> ();
    try {
        Scanner sentenceScanner = new Scanner (new File("data/" + fileName));
        while (sentenceScanner.hasNextLine()) {
            sentenceList.add (sentenceScanner.nextLine());
        }
        sentenceScanner.close();
    } catch (FileNotFoundException e) {
        System.out.println ("File Not Found");
    }

    for (int r = 0; r < sentenceArray.length; r++) {
        sentence = sentenceArray [r].split ("(?<=[.!?])\\s*");
        for (int i = 0; i < sentence.length; i++) {
            System.out.println (sentence [i]);
        }
    }

Answer 1

最好在读取输入数据时进行过滤:

while (sentenceScanner.hasNextLine()) {
    String line = sentenceScanner.nextLine().trim();
    if (!line.isEmpty()) {
        sentenceList.add (line);
    }
}