package com.zs.boot.controller;
import org.junit.Test;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAdjusters;
import java.util.Set;
public class TestlocalDateTime {
//5. DateTimeFormatter : 解析和格式化日期或时间
@Test
public void test(){
//默认的
//DateTimeFormatter dtf = DateTimeFormatter.ISO_LOCAL_DATE;
//我们自己指定的格式
//DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy年MM月dd日 HH:mm:ss E");
LocalDateTime ldt = LocalDateTime.now();
String strDate = ldt.format(dtf);
System.out.println(strDate);//2021年12月05日 11:39:14 星期日
LocalDateTime newLdt = ldt.parse(strDate, dtf);
System.out.println(newLdt);//2021-12-05T11:42:10
}
@Test
public void test6(){
//获取所有时区时区信息
Set<String> set = ZoneId.getAvailableZoneIds();
set.forEach(System.out::println);
}
//6.ZonedDate、ZonedTime、ZonedDateTime :带时区的时间或日期
@Test
public void test7(){
LocalDateTime ldt = LocalDateTime.now(ZoneId.of("Asia/Shanghai"));
System.out.println(ldt);//2021-12-05T11:53:32.613
LocalDateTime ldt1 = LocalDateTime.now(ZoneId.of("Asia/Shanghai"));
ZonedDateTime zz = ldt1.atZone(ZoneId.of("Asia/Shanghai"));
System.out.println(zz);//2021-12-05T11:53:32.614+08:00[Asia/Shanghai]
ZonedDateTime zdt = ZonedDateTime.now(ZoneId.of("US/Pacific"));
System.out.println(zdt);//2021-12-04T19:53:32.628-08:00[US/Pacific]
}
}