java - 需要使用java文件读取概念找出具有今天修改日期的特定文件

Question

一个文件夹中有多个文件。如何仅获取仅在今天日期修改的特定文件(带有修改日期和时间的文件名)？

Answer 1

public static void main(String[] args) {
    long now = new Date().getTime();
    long todayMidnightTS = midnightTimeStamp(now);
    //Mind the path used to list children... And also, you may want to retain only child files if that's required.
    List<File> filesModifiedToday = Arrays.asList(new File(".").list()).stream().map(fileName -> new File(fileName)).filter(file -> todayMidnightTS == midnightTimeStamp(file.getCanonicalFile().lastModified())).collect(Collectors.toList());
}
//Returns the timestamp at midnight of the given date time stamp.
//If you use commons-lang, you could call DateUtils.trunc
static long midnightTimeStamp(long dateTS) {
    return dateTS - (dateTS % (24 * 60 * 60000));
}