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]
    }


}