问题描述
我想使用 Date 和 Calendar 类计算 java 中两个日期/时间之间的差异.我的格式是2012-01-24 12:30:00 PM".
I want to calculate the difference between two date/time in java using Date and Calendar classes. The format that I have is "2012-01-24 12:30:00 PM".
我已经实现了我自己的方法,并在谷歌上搜索它以与其他人一起工作,但没有得到正确的提示来处理 AM 和 PM 值.
I have implemented my own method and also google it to work with others, but haven't getting the right hint to handle AM and PM values.
只要时间中有 12(AM/PM),日期/时间差异就会受到影响.例如,如果我的日期/时间为2012-01-24 12:30:00 PM"和2012-01-24 02:30:00 PM",则显示时差为 10 小时.
The date/time difference got troubled whenever the time have 12(AM/PM) in it. For example if I have date/time "2012-01-24 12:30:00 PM" and "2012-01-24 02:30:00 PM" it shows the difference is 10 hours.
考虑 此链接上的代码 如何修改它来处理 AM 和 PM.
Considering the code on this link how can it be modified to handle AM and PM.
要将字符串日期转换为日期,我使用以下代码:
To convert String date into Date I use following code:
String sessionTimeStart = "2012-01-24 12:30:00 PM";
String sessionTimerEndOrCurrent = "2012-01-24 02:30:00 PM";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss a");
Date d1 = null;
Date d0 = null;
try {
d1 = format.parse(sessionTimeStart);
d0 = format.parse(sessionTimerEndOrCurrent);
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
推荐答案
问题是你的日期格式:而不是 yyyy-MM-dd HH:mm:ss a
使用 yyyy-MM-dd hh:mm:ss a
.
The problem is your date format: instead of yyyy-MM-dd HH:mm:ss a
use yyyy-MM-dd hh:mm:ss a
.
HH
将是一天中的小时 (0-23),而 hh
将是 AM/PM (1-12) 中的小时.因此,您的日期格式 02:30:00 将被解析为那样,而不是被转换为 PM 版本(一天中的小时为 14:30:00).
HH
will be the hour in day (0-23) whereas hh
will be the hour in AM/PM (1-12). Thus with your date format 02:30:00 will be parsed as just that instead of being converted to the PM version (which in hour of day would be 14:30:00).
这篇关于考虑 AM/PM 计算 Java 中的日期/时间差的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!