java - 如何在Java中返回LocalTime的总和

Question

它不会得到 session 记录。我需要返回分钟数。如何在 Java 中迭代 Localtime 时返回分钟总和？

public String userLunchHoursSum(String username) {
    List<WorkHour> workHours = workHourRepository.findWorkHoursByUsername(username);
    System.out.println(Arrays.toString(workHours.toArray()));
    long diff = 0;
    LocalTime lunchTime;
    long minutes = 0;
    LocalTime plusMinutes = null;
    for (WorkHour workHour : workHours) {
        lunchTime = workHour.getLunch_time().toLocalTime(); //00:30:00
        plusMinutes = lunchTime.plusMinutes(lunchTime.getMinute());
    }
    if(workHours.size()!= 0) {
        return Long.toString(plusMinutes.getMinute());
    }
    return "00:00";
}

getLunch_time 返回java.sql.Time。

Answer 1

如上所述，您应该存储持续时间而不是本地时间。如果这是您无法控制的，请考虑迁移数据库或创建中间解析函数。我还没有运行示例代码，因为我不知道 WorkHour 中有什么。

// leave the string formatting to other functions
public long userLunchHoursSum(String username) {
    List<WorkHour> workHours = workHourRepository.findWorkHoursByUsername(username);
    Duration totalDuration = Duration.ZERO;
    for (WorkHour workHour : workHours) {
        // save your time in the appropriate format beforehand
        // do not use local time to store duration.
        Duration lunchTime = Duration.between(LocalTime.MIDNIGHT, workHour.getLunch_time().toLocalTime()); //00:30:00
        totalDuration = totalDuration.plus(lunchTime);
    }
    return totalDuration.toMinutes();
}