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xuwujing
2018-12-19 17:10:27 +08:00
parent 5e3d7d0e16
commit 55fdf0d393
1 changed files with 0 additions and 116 deletions
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src/main/java/com/pancm/jdk8/TimeTest.java
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package com.pancm.jdk8;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.Month;
import java.time.Period;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
/**
* @Title: TimeTest
* @Description:
* 时间测试
* @Version:1.0.0
* @author pancm
* @date 2018年6月21日
*/
public class TimeTest {
/**
* @param args
*/
public static void main(String[] args) {
test();
test2();
test3();
test4();
}
/**
* 时间测试
*/
private static void test(){
//获取当前的时间，包括毫秒
LocalDateTime ldt = LocalDateTime.now();
// String time="2018-06-29 09:19:45.498";
String time2="2018-01-04T09:19:29.499";
//格式化时间
LocalDateTime ldt2=LocalDateTime.parse(time2);
System.out.println("当前年:"+ldt.getYear()); //2018
System.out.println("当前年份天数:"+ldt.getDayOfYear());//172
System.out.println("当前月:"+ldt.getMonthValue());
System.out.println("当前时:"+ldt.getHour());
System.out.println("当前分:"+ldt.getMinute());
System.out.println("当前时间:"+ldt.toString());
System.out.println("格式化时间:"+ ldt.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS")));
System.out.println("前5天时间:"+ldt.minusDays(5).format(DateTimeFormatter.ofPattern("yyyy-MM-dd"))); //2018-06-16
System.out.println("后5天时间:"+ldt.plusDays(5));
System.out.println("指定2099年的当前时间:"+ldt.withYear(2099)); //2099-06-21T15:07:39.506
System.out.println("前一个月的时间:"+ldt2.minusMonths(1).format(DateTimeFormatter.ofPattern("yyyyMM"))); //2018-06-16
System.out.println("后一个月的时间:"+ldt2.plusMonths(1)); //2018-06-16
System.out.println("得到的时间:"+ldt2.toString());
System.out.println("格式化时间:"+ldt2.format(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
}
/**
*
*/
private static void test2(){
LocalDate ld=LocalDate.parse("2017-11-17");
LocalDate ld2=LocalDate.parse("2018-01-05");
LocalDate ld3=LocalDate.of(2017, 11, 01);
LocalDate ld4=LocalDate.of(2018, 01, 01);
//jdk1.8的类，用于比较时间
//可以得到相差年、月、日
Period p=Period.between(ld, ld2);
System.out.println("相差年: "+p.getYears()+" 相差月 :"+p.getMonths() +" 相差天:"+p.getDays());
System.out.println("增加2个月: "+ld.plusMonths(2));
// 相差年: 0 相差月 :1 相差天:19
Period p2=Period.between(ld3, ld4);
System.out.println("相差年: "+p2.getYears()+" 相差月 :"+p2.getMonths() +" 相差天:"+p2.getDays()+"--"+p2.toTotalMonths());
//相差年: 0 相差月 :2 相差天:0
}
/**
*
*/
private static void test3(){
Instant inst1 = Instant.now();
System.out.println("Inst1 : " + inst1);
Instant inst2 = inst1.plus(Duration.ofSeconds(10));
System.out.println("Inst2 : " + inst2);
System.out.println("相差毫秒 : " + Duration.between(inst1, inst2).toMillis());
System.out.println("相毫秒 : " + Duration.between(inst1, inst2).getSeconds());
}
/**
* 单个时间单位内测量一段时间
*/
private static void test4(){
//2017-11-19
LocalDate startDate = LocalDate.of(2017, Month.NOVEMBER, 01);
System.out.println("开始时间 : " + startDate);
//2018-1-16
LocalDate endDate = LocalDate.of(2018, Month.JANUARY, 01);
System.out.println("结束时间 : " + endDate);
System.out.println("相差月份:"+ChronoUnit.MONTHS.between(startDate, endDate));
long daysDiff = ChronoUnit.DAYS.between(startDate, endDate);
System.out.println("两天之间的差在天数 : " + daysDiff);
}
}