从文件中逐行读取字符串

1. IO流读取

• Inputstream字节流按字节读取
• Reader字符流按字符读取
• InputStreamReader将字节流包装为字符流
• BufferedReader将InputStreamReader包装实现逐行读取

public static List<String> getListFromfile(String file) {
        List<String> wordList = new ArrayList<>();
        try (InputStream inputStream = PyProcessService.class.getResourceAsStream(file);
             BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {
            String word;
            while ((word = reader.readLine()) != null) {
                wordList.add(word.trim());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return wordList;
}

2. Files.lines方法

• Path表示文件路径可以不用考虑不同平台路径分割符的差异
• Files.lines方法获得文件每行字符串构成的流，方便快捷

public static void main(String[] args) {
        try (Stream<String> lines = Files.lines(Paths.get("./src/main/resources/suggest_words.csv"))) {
            lines.forEach(System.out::println);
        } catch (IOException e) {
            e.printStackTrace();
        }
}