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package java8;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.Period;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.Calendar;
import java.util.Date;
/**
* Created by yahier on 2018/1/22.
* 测试api 新的日期和时间
*/
public class TimeTest {
public static void main(String[] args) {
test1();
test2();
test3();
test4();
test5();
test6();
practice1();
practice4();
}
//时间线Instant 和时间间隔 Duration
static void test1() {
Instant instant = Instant.now();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Instant instant2 = Instant.now();
Duration duration = Duration.between(instant, instant2);
println("test1", duration.getSeconds() + "");
Duration duration2 = duration.multipliedBy(10);
println("test1", duration2.getSeconds() + "");
}
//本地日期 LocalDate
static void test2() {
LocalDate dateNow = LocalDate.now();
LocalDate date = LocalDate.of(2018, 1, 1);
date = date.plusDays(100);
int year = date.getYear();
int month = date.getMonthValue();
int day = date.getDayOfMonth();
int weekDay = date.getDayOfWeek().getValue();//星期一调用 返回1
println("test2", year + "-" + month + "-" + day + " 星期" + weekDay);
if (date.isBefore(dateNow)) {
println("test2", "date.isBefore(dateNow)");
}
}
//本地时间 LocalTime
static void test3() {
LocalTime time = LocalTime.of(8, 0);
//LocalTime time = LocalTime.now();
int hour = time.getHour();
int minutes = time.getMinute();
int second = time.getSecond();
println("test3", hour + ":" + minutes + ":" + second);
}
//ZonedDateTime
static void test4() {
ZonedDateTime dateTime = ZonedDateTime.of(LocalDate.now(), LocalTime.now(), ZoneId.of("Asia/Shanghai"));
int year = dateTime.getYear();
int month = dateTime.getMonthValue();
int day = dateTime.getDayOfMonth();
int hour = dateTime.getHour();
int minutes = dateTime.getMinute();
println("test4", year + "-" + month + "-" + day + " " + hour + ":" + minutes);
}
//格式化日期
static void test5() {
//DateTimeFormatter formatter = DateTimeFormatter.ISO_DATE;//2018-01-23
//DateTimeFormatter formatter = DateTimeFormatter.ISO_LOCAL_DATE;//2018-01-23
//DateTimeFormatter formatter = DateTimeFormatter.ISO_LOCAL_TIME;//09:09:24.254
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");//2018-01-23 09:12:05
LocalDateTime dateTime = LocalDateTime.now();
String format1 = dateTime.format(formatter);
println("test5", format1);
//将格式化的String还原回日期
DateTimeFormatter formatter2 = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
LocalDateTime localDateTime = LocalDateTime.parse("2018-01-23 15:02", formatter2);
println("test5", "hour:" + localDateTime.getHour());
DateTimeFormatter formatter3 = DateTimeFormatter.ofPattern("yyyy MM dd");
LocalDate date = LocalDate.parse("2017 06 17", formatter3);
println("test5", "date:" + formatter3.format(date));
}
//与旧有类交互
static void test6() {
Date date = new Date();
Instant instant = date.toInstant();
Calendar calendar = Calendar.getInstance();
Date date2 = calendar.getTime();
println("test6", date.getTime() + ":" + date2.getTime());
LocalDate localDate = LocalDate.now();
//date calendar怎么与LocalDate LocalTime转换是不知道了。
ZonedDateTime zonedDateTime = instant.atZone(ZoneId.of("Asia/Shanghai"));
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");//2018-01-23 09:12:05
String formatTime2 = zonedDateTime.format(formatter);
println("test6", formatTime2);
}
//计算今年的程序员节的日期(每年的第256天
static void practice1() {
LocalDate date = LocalDate.of(2018, 1, 1);
date = date.plusDays(255);
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
println("practice1", date.format(formatter));
//不使用plus方法的话
}
//计算活了多少天
static void practice4() {
LocalDate dateNow = LocalDate.now();
LocalDate dateBirth = LocalDate.of(1990, 1, 11);
Period period = Period.between(dateBirth, dateNow);
int years = period.getYears();
int months = period.getMonths();
int days = period.getDays();
println("practice4", years + "," + months + "," + days);
//以上的算法太麻烦了
//最简单的计算
long daysDiff = ChronoUnit.DAYS.between(dateBirth, dateNow);
println("practice4", "daysDiff: " + daysDiff);//good
LocalTime time1 = LocalTime.of(14, 5);
LocalTime time2 = LocalTime.of(16, 23);
long timeDiff = ChronoUnit.MINUTES.between(time1, time2);
println("practice4", "timeDiff: " + timeDiff);//good
}
private static void println(String tag, String value) {
System.out.println(tag + "," + value);
System.out.println();
}
}