java 中 2 个日期对象之间的差异（以分钟为单位）

Question

我想在几分钟内得到 java 中两个日期对象之间的差异，以了解用户在我的应用程序中登录了多少分钟。

    String query = "Select * from cabin_info where ip_address = ?";
        ps = con.prepareStatement(query);
        ps.setString(1, IPAddress);
        rs = ps.executeQuery();
        if (rs.next()) {
            cabin_id = rs.getInt("cabin_id");
            start_time = rs.getString("start_time");
            username = rs.getString("username");
        }
        Date st_time = AppConstants.time_format.parse(start_time);

        Date date = AppConstants.time_format.parse(AppConstants.time_format.format(new Date()));
        long diff = date.getTime() - st_time.getTime();
        long diffMinutes = diff / (60 * 1000) % 60;
        System.out.println("Total time = " + diffMinutes);

日期格式为 HH-mm-ss

但我得到的只是时间分钟之间的差异，而不是时间

Answer 1

由于您要查找以分钟为单位的时间间隔，因此只需将毫秒转换为分钟即可。

minutes = milliseconds/(60*1000)

因此，您的代码：

 long diffMinutes = diff / (60 * 1000) % 60;

变为：

 long diffMinutes = diff / (60 * 1000);

如果您想计算小时和分钟，在末尾添加一个模数 60 是有意义的。

Answer 2

long result = ((date.getTime()/60000) - (st_time.getTime()/60000));
System.out.println("Total time = " + result);

将毫秒转换为分钟并减去它

Answer 3

长分钟 = TimeUnit.MINUTES.convert(date.getTime() - st_time.getTime(), TimeUnit.MILLISECONDS)

java 中 2 个日期对象之间的差异（以分钟为单位）

difference between 2 date objects in minutes in java

java

time