Java 各種時間上的操作範例
分享一些在專案中用到JAVA與日期相關的操作，包括：
- 取得目前的年、月、日
- 判斷兩個日期的大小
- 計算兩個日期的差距
- 取得昨天的日期
- 取得上個月的開始與結束日
package CDIT.stanley;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Calendar;
public class dateOperation {
public static int differentDays(Date date1,Date date2){
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
int day1= cal1.get(Calendar.DAY_OF_YEAR);
int day2 = cal2.get(Calendar.DAY_OF_YEAR);
int year1 = cal1.get(Calendar.YEAR);
int year2 = cal2.get(Calendar.YEAR);
if(year1 != year2){
int timeDistance = 0 ;
for(int i = year1 ; i < year2 ; i ++){
if(i%4==0 && i%100!=0 || i%400==0){
timeDistance += 366;
}
else{
timeDistance += 365;
}
}
return timeDistance + (day2-day1) ;
}
else{
return day2-day1;
}
}
public static Date getFirstMonthDay(Calendar calendar) {
calendar.set(Calendar.DATE, calendar.getActualMinimum(Calendar.DATE));
return calendar.getTime();
}
public static Date getLastMonthDay(Calendar calendar) {
calendar.set(Calendar.DATE, calendar.getActualMaximum(Calendar.DATE));
return calendar.getTime();
}
public static void main(String[] args) throws ParseException {
//取得目前的年、月、日
Calendar calendar = Calendar.getInstance();
System.out.println("今天是" + calendar.get(Calendar.YEAR) + "年" + (calendar.get(Calendar.MONTH) + 1) + "月" + calendar.get(Calendar.DAY_OF_MONTH) + "日");
System.out.println("==================================================");
//輸出：今天是2017年8月24日
//判斷兩個日期的大小
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd", Locale.TAIWAN);
Date date1 = sdf.parse("2017-08-23");
Date date2 = sdf.parse("2016-09-22");
System.out.println("Date1 < Date2 : " + date1.before(date2));
System.out.println("Date1 > Date2 : " + date1.after(date2));
System.out.println("==================================================");
//輸出：Date1 < Date2 : false、Date1 > Date2 : true
//計算兩個日期的差距
System.out.println("Date1 & Date2 差距 : " + differentDays(date1 , date2) + "天");
System.out.println("==================================================");
//輸出：Date1 & Date2 差距 : 31天
//取得昨天的日期
calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, -1);
String yestedayDate = sdf.format(calendar.getTime());
System.out.println("昨天是" + yestedayDate);
System.out.println("==================================================");
//輸出：昨天是2017-08-23
//取得上個月的開始與結束日
calendar = Calendar.getInstance();
calendar.add(Calendar.MONTH,-1);
String monthDayFirst = sdf.format(getFirstMonthDay(calendar));
String monthDayLast = sdf.format(getLastMonthDay(calendar));
System.out.println("上個月的第一天是" + monthDayFirst);
System.out.println("上個月的最後一天是" + monthDayLast);
System.out.println("==================================================");
//輸出：上個月的第一天是2017-07-01、上個月的最後一天是2017-07-31
}
}
I have discovered that charges for on-line degree specialists tend to be an awesome value. Like a full 4-year college Degree in Communication from The University of Phoenix Online consists of Sixty credits at $515/credit or $30,900. Also American Intercontinental University Online offers a Bachelors of Business Administration with a complete course feature of 180 units and a price of $30,560. Online degree learning has made having your degree been so cool because you might earn your own degree in the comfort of your dwelling place and when you finish working. Thanks for all your other tips I’ve learned through the site.
http://hoahaubansacviet.com.vn
Thanks for your interesting article. Other thing is that mesothelioma cancer is generally the result of the breathing of materials from asbestos fiber, which is a extremely dangerous material. Its commonly found among personnel in the engineering industry with long experience of asbestos. It can be caused by moving into asbestos protected buildings for long periods of time, Your age plays a crucial role, and some persons are more vulnerable towards the risk than others.
Nice blog right here! Additionally your site rather a lot up very fast! What host are you the usage of? Can I am getting your affiliate link for your host? I want my web site loaded up as quickly as yours lol
Thanks for the marvelous posting! I really enjoyed reading it, you can be a great author.I will be sure to bookmark your blog and may come back down the road. I want to encourage you continue your great job, have a nice holiday weekend!
I?ve been exploring for a bit for any high quality articles or weblog posts on this sort of space . Exploring in Yahoo I finally stumbled upon this website. Studying this information So i am satisfied to express that I have a very good uncanny feeling I came upon just what I needed. I most surely will make certain to don?t forget this web site and provides it a look regularly.
I have been exploring for a little for any high-quality articles or blog posts on this sort of area . Exploring in Yahoo I at last stumbled upon this site. Reading this info So i?m happy to convey that I’ve an incredibly good uncanny feeling I discovered just what I needed. I most certainly will make certain to don?t forget this website and give it a look on a constant basis.
Hi my loved one! I want to say that this post is amazing, nice written and include almost all significant infos. I?d like to see extra posts like this .
Hi there this is kind of of off topic but I was wanting to know if blogs use WYSIWYG editors or if you have to manually code with HTML. I’m starting a blog soon but have no coding expertise so I wanted to get advice from someone with experience. Any help would be greatly appreciated!
politictoday.ru/page/39В
russianecuador.com/member.php?tab=visitor_messaging&u=13207&page=20В
custom-engravable-jewelry.com/bracelet.phpВ
51.15.223.140/forum/member.php?tab=visitor_messaging&u=76509&page=6В
truyen.biz/doi-anh-em-ba-dao-chapter-22/В
I know this if off topic but I’m looking into starting my own weblog and was curious what all is required to get set up? I’m assuming having a blog like yours would cost a pretty penny? I’m not very internet smart so I’m not 100 certain. Any suggestions or advice would be greatly appreciated. Thank you
Yet another issue is really that video gaming became one of the all-time most significant forms of recreation for people of all ages. Kids engage in video games, and adults do, too. The particular XBox 360 is amongst the favorite games systems for many who love to have a huge variety of activities available to them, in addition to who like to learn live with other folks all over the world. Many thanks for sharing your notions.
lucky jet 1win lucky jet 1win .
Thanks for the thoughts you are giving on this blog site. Another thing I would like to say is getting hold of copies of your credit rating in order to check accuracy of the detail is one first action you have to conduct in credit score improvement. You are looking to thoroughly clean your credit reports from detrimental details problems that screw up your credit score.
What?s Happening i am new to this, I stumbled upon this I have found It positively helpful and it has aided me out loads. I hope to contribute & assist other users like its helped me. Good job.
Thanks for making me to achieve new tips about computer systems. I also have belief that certain of the best ways to help keep your laptop in best condition is with a hard plastic case, or shell, that matches over the top of one’s computer. These kinds of protective gear tend to be model precise since they are made to fit perfectly across the natural housing. You can buy them directly from the vendor, or from third party sources if they are intended for your mobile computer, however not every laptop can have a cover on the market. Again, thanks for your guidelines.
Jogue em um cassino confiavel Blaze
Hello! I could have sworn I’ve been to this blog before but after checking through some of the post I realized it’s new to me. Nonetheless, I’m definitely happy I found it and I’ll be book-marking and checking back often!
Ganhe no cassino mais confiavel Blaze
Thank you for another informative site. Where else could I get that kind of information written in such a perfect way? I’ve a project that I am just now working on, and I have been on the look out for such info.
I was recommended this web site by means of my cousin. I am not sure whether or not this put up is written through him as nobody else understand such targeted approximately my problem. You’re wonderful! Thank you!
Отличный сайт! Всем рекомендую!Тут Вы можете приобреститовары для охоты
I learned more a new challenge on this fat loss issue. One particular issue is a good nutrition is highly vital whenever dieting. A tremendous reduction in junk food, sugary ingredients, fried foods, sweet foods, red meat, and white flour products might be necessary. Possessing wastes parasitic organisms, and harmful toxins may prevent desired goals for shedding fat. While specified drugs briefly solve the situation, the nasty side effects aren’t worth it, and so they never present more than a short-term solution. It’s a known idea that 95 of fad diet plans fail. Thanks for sharing your ideas on this website.
Wonderful website. Lots of useful info here. I am sending it to some friends ans also sharing in delicious. And naturally, thanks for your sweat!
dapagliflozin 10 mg cheap – precose sale acarbose 50mg uk
These days of austerity as well as relative stress and anxiety about incurring debt, lots of people balk contrary to the idea of using a credit card to make acquisition of merchandise or perhaps pay for any occasion, preferring, instead just to rely on the particular tried as well as trusted technique of making payment – raw cash. However, if you possess the cash available to make the purchase 100 , then, paradoxically, that’s the best time to use the cards for several factors.
You really make it seem so easy with your presentation but I find this matter to be really something which I think I would never understand. It seems too complicated and very broad for me. I am looking forward for your next post, I?ll try to get the hang of it!
В нашем обществе, где аттестат становится началом успешной карьеры в любой области, многие ищут максимально простой путь получения качественного образования. Наличие официального документа об образовании сложно переоценить. Ведь диплом открывает дверь перед любым человеком, желающим вступить в профессиональное сообщество или учиться в любом ВУЗе.
Предлагаем максимально быстро получить этот необходимый документ. Вы сможете приобрести аттестат нового или старого образца, что становится отличным решением для человека, который не смог закончить обучение или потерял документ. Каждый аттестат изготавливается аккуратно, с особым вниманием к мельчайшим элементам, чтобы в итоге получился продукт, максимально соответствующий оригиналу.
Преимущества данного решения заключаются не только в том, что вы оперативно получите свой аттестат. Процесс организован удобно, с профессиональной поддержкой. От выбора нужного образца до консультации по заполнению персональной информации и доставки по России — все находится под абсолютным контролем квалифицированных специалистов.
В итоге, для тех, кто ищет быстрый способ получения необходимого документа, наша компания предлагает выгодное решение. Купить аттестат – значит избежать продолжительного обучения и сразу переходить к достижению личных целей: к поступлению в университет или к началу удачной карьеры.
https://violetshop.vn/
I have not checked in here for a while as I thought it was getting boring, but the last few posts are great quality so I guess I?ll add you back to my everyday bloglist. You deserve it my friend 🙂
I love your blog.. very nice colors & theme. Did you create this website yourself or did you hire someone to do it for you? Plz answer back as I’m looking to create my own blog and would like to find out where u got this from. cheers
Thanks for expressing your ideas. The one thing is that students have a choice between government student loan and also a private student loan where it truly is easier to go with student loan debt consolidation loan than through the federal student loan.