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
}
}
Thanks for sharing all these wonderful posts. In addition, an excellent travel and also medical insurance strategy can often ease those worries that come with visiting abroad. Any medical emergency can in the near future become very costly and that’s certain to quickly set a financial impediment on the family’s finances. Setting up in place the excellent travel insurance program prior to setting off is definitely worth the time and effort. Cheers
Ukrainian President Volodymyr Zelensky will meet US President Joe Biden and Vice President Kamala Harris in Washington on Thursday. Leon Neal/Getty Images
CNN
—
Ukrainian President Volodymyr Zelensky’s visit to the White House on Thursday could be his final chance to convince a receptive American president of his country’s war aims.
[url=https://mega555kf7lsmb54yd6etzginolhxxi4ytdoma2rf77ngq55fhfcnyida.com]megaweb12.at[/url]
The precise details of the “victory plan” Zelensky plans to present in separate meetings to President Joe Biden and Vice President Kamala Harris are unknown, having been closely held until they are presented to the American leaders.
But according to people briefed on its broad contours, the plan reflects the Ukrainian leader’s urgent appeals for more immediate help countering Russia’s invasion. Zelensky is also poised to push for long-term security guarantees that could withstand changes in American leadership ahead of what is widely expected to be a close presidential election between Harris and former President Donald Trump.
The plan, people familiar with it said, acts as Zelensky’s response to growing war weariness even among his staunchest of western allies. It will make the case that Ukraine can still win — and does not need to cede Russian-seized territory for the fighting to end — if enough assistance is rushed in.
That includes again asking permission to fire Western provided long-range weapons deeper into Russian territory, a line Biden once was loathe to cross but which he’s recently appeared more open to as he has come under growing pressure to relent.
Even if Biden decides to allow the long-range fires, it’s unclear whether the change in policy would be announced publicly.
Biden is usually apt to take his time making decisions about providing Ukraine new capabilities. But with November’s election potentially portending a major change in American approach to the war if Trump were to win, Ukrainian officials — and many American ones — believe there is little time to waste.
мега сайт
https://megaweb-12at.com
Trump has claimed he will be able to “settle” the war upon taking office and has suggested he’ll end US support for Kyiv’s war effort.
“Those cities are gone, they’re gone, and we continue to give billions of dollars to a man who refused to make a deal, Zelensky. There was no deal that he could have made that wouldn’t have been better than the situation you have right now. You have a country that has been obliterated, not possible to be rebuilt,” Trump said during a campaign speech in Mint Hill, North Carolina, on Wednesday.
Comments like those have lent new weight to Thursday’s Oval Office talks, according to American and European officials, who have described an imperative to surge assistance to Ukraine while Biden is still in office.
As part of Zelensky’s visit, the US is expected to announce a major new security package, thought it will likely delay the shipping of the equipment due to inventory shortages, CNN previously reported according to two US officials. On Wednesday, the US announced a package of $375 million.
The president previewed Zelensky’s visit to the White House a day beforehand, declaring on the margins of the United Nations General Assembly his administration was “determined to ensure that Ukraine has what it needs to prevail in fight for survival.”
[url=https://mega555kf7lsmb54yd6etzginolhxxi4ytdoma2rf77ngq5fhfcnid.com]megaweb7.at[/url]
“Tomorrow, I will announce a series of actions to accelerate support for Ukraine’s military – but we know Ukraine’s future victory is about more than what happens on the battlefield, it’s also about what Ukrainians do make the most of a free and independent future, which so many have sacrificed so much for,” he said.
Howdy! I simply would like to give an enormous thumbs up for the great data you’ve gotten here on this post. I shall be coming again to your blog for extra soon.
Bulk shopping for makes it straightforward to cater to giant groups with out worrying about running out of supplies.
The Dankso Skilled womens leather-based clogs have such a basic look, with a stupendous leather-based higher and chunky sole.
As of April 7, in case you are an Argentinian citizen or resident, you’ll only have to fill in a sworn assertion about your vaccination status and affirm the absence of signs related to Coronavirus within forty eight hours prior to travel.
Встречайте криптовалютного босса в казино, добейтесь успеха вместе с лучшим криптовалютным казино, возможность выиграть крупный джекпот, освойте мир криптовалютных игр в казино Cryptoboss, стать криптобоссом легко с Cryptoboss casino, захватывающий азарт с криптовалютным боссом, испытайте свою удачу в казино Cryptoboss, участвуйте в захватывающих играх в Cryptoboss casino, удивительные возможности в казино от Cryptoboss, Cryptoboss casino – ваш путь к криптовалютному успеху, революция в криптовалютных играх с Cryptoboss casino, Cryptoboss casino – ваш путеводитель в мире криптовалютных игр, играйте и побеждайте с Cryptoboss casino, следуйте за лидером с Cryptoboss casino, выигрывайте крупные суммы с Cryptoboss casino, Cryptoboss casino – гарант криптовалютных побед.
криптобосс сайт [url=https://ikea-expert.ru/]криптобосс hds5[/url] .
Okay, these Fresh Foam Gobi V2 – Protect Pack from New Balance are technically “trail runners” however they’re extremely water-resistant and nice looking.
I also believe that mesothelioma cancer is a unusual form of cancers that is often found in those people previously subjected to asbestos. Cancerous tissues form inside the mesothelium, which is a safety lining that covers almost all of the body’s areas. These cells ordinarily form inside the lining of your lungs, belly, or the sac that encircles the heart. Thanks for sharing your ideas.
cefdinir over the counter – buy clindamycin without prescription oral clindamycin
Usually I do not read article on blogs, but I would like to say that this write-up very compelled me to take a look at and do it! Your writing style has been amazed me. Thank you, quite great article.
Recently, Walmart grew to become the primary main retailer to demand manufacturers use radio frequency identification know-how (RFID).
Some previous Limoges china patterns are extra frequent than others due to their recognition throughout certain intervals.
furosemida 40 mg: furosemide online – furosemida 40 mg
Notice that supplemental medical evacuation insurance coverage is required on most Antarctica cruises.
Appreciating the hard work you put into your blog and in depth information you present. It’s awesome to come across a blog every once in a while that isn’t the same unwanted rehashed material. Great read! I’ve bookmarked your site and I’m adding your RSS feeds to my Google account.
lasix 100 mg tablet: cheap lasix – furosemide 40mg
Hi there, just became aware of your blog through Google, and found that it’s truly informative. I am going to watch out for brussels. I?ll be grateful if you continue this in future. A lot of people will be benefited from your writing. Cheers!
It?s hard to find educated individuals on this subject, but you sound like you know what you?re talking about! Thanks
On and on we go, reaching the National Park restaurant round mid-day for our lunch stop.
Thanks for the several tips discussed on this blog site. I have observed that many insurance firms offer prospects generous discount rates if they prefer to insure a couple of cars with them. A significant quantity of households include several automobiles these days, particularly those with more mature teenage children still dwelling at home, and also the savings upon policies may soon mount up. So it will pay to look for a good deal.
how much is generic neurontin: neurontin 900 mg – neurontin brand name 800mg best price
ventolin 2.5: Buy Albuterol for nebulizer online – ventolin 4mg tab
The sleek and wet aesthetic of the hairstyle goes completely properly with the dark mullet at the bottom and emerald inexperienced highlights on the highest, making a polished and neat look.
buy rybelsus: rybelsus price – buy rybelsus
ventolin inhaler non prescription: buy Ventolin – ventolin 100 mcg
23in. And 25ins. I made v necks utilizing certainly one of my son’s shirts as a guide.
I enjoy what you guys are usually up too. This type of clever work and exposure! Keep up the fantastic works guys I’ve you guys to blogroll.
Hello, I think your site might be having browser compatibility issues. When I look at your blog in Ie, it looks fine but when opening in Internet Explorer, it has some overlapping. I just wanted to give you a quick heads up! Other then that, fantastic blog!
The plimsolls are made up of rubber soles and a canvas upper – the basic ingredients to comfort.