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
}
}
This is what the Democrats are centered on,’ mentioned Ohio Republican Rep.
African curls, in distinction, current a different picture.
This comfort issue plays a big function in patient satisfaction, because it reduces the time and effort required to entry psychological health care services.
What are your investment targets?
Nonetheless, before you may decide to purchase a property or take a home on rent, it is critical to grasp all the mandatory intricacies of property administration Baltimore.
Spruce up your kitchen with this tremendous cute Sewn Hanging Dish Towel Pattern.
No farmers, no meals.
Реально ли приобрести диплом стоматолога? Основные этапы
Предлагаем услуги профессиональных инженеров офицальной мастерской.
Еслли вы искали официальный сервисный центр xiaomi, можете посмотреть на сайте: сервисный центр xiaomi
Наши мастера оперативно устранят неисправности вашего устройства в сервисе или с выездом на дом!
The state prohibited folks from selling Christmas bushes.
Как купить диплом о высшем образовании с минимальными рисками
deutschekleidung.com/read-blog/15660
The newspaper believed that the railroad didn’t need to rebuild on the primary Avenue site due to the Hygeria Brewing Company and Muhs & Amour packing plants that existed subsequent to the railroad.
On the planet of in the present day to make full use of fashionable residence inside designs which assist to create clean as well as organized interiors.
There has been criticism within the difference of schemes used in the nation equivalent to the colour of bins, whether the recycling is collected from wheelie bins, colored plastic bins or plastic luggage, and in addition the fact that the bins, packing containers and luggage obstruct the roads and pavements, and how the additional collection automobiles and waste assortment services wanted also contribute to site visitors congestion and produce carbon dioxide emissions.
Процесс получения диплома стоматолога: реально ли это сделать быстро?
George Clifford Ashman Greetham, Chief Structural Engineer, Ministry of Works.
Kline additionally produced detail concerning the freight sidings in Passaic and the effect a grade crossing elimination project would do to them.
UK – With the distinctive summer time within the UK, festival season has been basking in a bumper 12 months and comfortable images of crowds enjoying their outside experiences in glorious sunshine are being printed on a weekly foundation.
Предлагаем услуги профессиональных инженеров офицальной мастерской.
Еслли вы искали сервисный центр xiaomi, можете посмотреть на сайте: официальный сервисный центр xiaomi
Наши мастера оперативно устранят неисправности вашего устройства в сервисе или с выездом на дом!
. https://www.editorialfox.com/fun-activities-for-couples-best-date-ideas/ .
Link Building Services
]link building seo services
Hey there, future SEO rockstar! Ready to skyrocket your business to new heights? Let’s dive into the exciting world of link building services that can seriously amp up your online presence. Whether you’re just starting out or looking to boost your existing strategy, we’ve got the lowdown on the coolest methods out there—think crowd marketing, guest posting, PBNs, and more!
Why Link Building is Your New Best Friend
First things first: why should you care about link building? Well, in the digital universe, backlinks are like high-fives from other websites telling search engines, “Hey, this site is pretty cool!” The more quality high-fives you get, the more popular you become in the eyes of Google and friends. And you know what that means—higher rankings, more traffic, and a whole lot of new customers knocking on your virtual door.
Guest Posting: Share Your Voice with the World
Imagine getting to share your ideas on someone else’s platform and gaining their audience’s trust. That’s guest posting in a nutshell! You create killer content for other websites in your niche, and in return, you get a sweet backlink to your site. Why It’s Cool: You tap into new audiences, build your brand’s credibility, and boost your SEO. Pro Tip: Make sure your content is top-notch and adds real value. No one likes fluff!
Crowd Marketing: Join the Conversation
Crowd marketing is all about jumping into online communities—forums, social media groups, you name it—and sharing your wisdom. It’s not about shameless plugs; it’s about being genuinely helpful. Why It’s Cool: You build relationships, establish yourself as an expert, and earn organic backlinks. Pro Tip: Be authentic. People can spot a fake from a mile away.
Узнай все о лапароскопия варикоцеле заболевание варикоцеле
Let me say this is not a very stimulating subject, I know, however that’s why it’s so vital that we keep bringing this deficit down to stability the price range.
Immerse the ornaments of Irani Feroza gemstone in the Gangajal, uncooked milk, & Tulsi leaves for cleansing and activation.
Anthony Charles Harding, Police Constable, Metropolitan Police.
Peggy Sophia Wooden. For providers to Charity.
Процесс получения диплома стоматолога: реально ли это сделать быстро?
Our towels are excessive-high quality and affordable.
can i purchase generic clomid pill clomid can i order generic clomid now
Before you go into any negotiations, look and see what the truthful market rates in the realm are like.