package com.olm.util;

import cn.hutool.core.date.DateUtil;

import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;

/**
 * ClassName:DateTime2Millis Package:com.olm.util Date:2020/8/6 Auth:penghui@olm.com.cn
 */
public class DateTime2Millis {
    private static final String FORMAT_STR = "yyyy-MM-dd HH:mm:ss";

    public static void main(String[] args) {
        System.out.println("====== JDK7及之前 ======");
        Long l1 = getMillis1();
        Long l2 = date2Millis(new Date());
        Long l3 = calendar2Millis(Calendar.getInstance());
        Long l4 = string2Millis(new SimpleDateFormat(FORMAT_STR).format(new Date()), FORMAT_STR);//为了与以上几个保持一致
        System.out.println(l1 + "\n" + l2 + "\n" + l3 + "\n" + l4);//会有几毫秒的差别

        System.out.println("====== JDK8 ======");
        Long l5 = getMillis2();
        Long l6 = localDateTime2Millis(LocalDateTime.now());
        Long l7 = localDate2Millis(LocalDate.now());
        Long l8 = clock2Millis(Clock.systemUTC());
        Long l9 = zoneDateTime2Millis(ZonedDateTime.now());
        Long l10 = string2MillisWithJDK8(LocalDateTime.now().format(DateTimeFormatter.ofPattern(FORMAT_STR)), FORMAT_STR);//为了与以上几个保持一致
        System.out.println(l5 + "\n" + l6 + "\n" + l7 + "\n" + l8 + "\n" + l9 + "\n" + l10);//会有几毫秒的差别
        //上上个月26号到上个月25号
        //首先判断是否是1号

        //2转long型号
        long customItem52__c = Long.valueOf("2").longValue();
        System.out.println(customItem52__c);
        Calendar d = Calendar.getInstance();
        Date lld = new LasMonth.LastLastMonthDate().convert(d);
        System.out.println(lld);

        Date startDate = DateUtil.parseDate("2022-09-09");
        System.out.println(startDate);
    }

    /**
     * 获取时间戳
     */
    public static Long getMillis1() {
        return System.currentTimeMillis();
    }

    /* JDK7及之前 */

    /**
     * Date转时间戳
     */
    public static Long date2Millis(Date date) {
        return date.getTime();
    }

    /**
     * Calendar转时间戳
     */
    public static Long calendar2Millis(Calendar calendar) {
        return calendar.getTime().getTime();
    }

    /**
     * 日期字符串转时间戳
     */
    public static Long string2Millis(String dateStr, String formatStr) {
        try {
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formatStr);
            return simpleDateFormat.parse(dateStr).getTime();
        } catch (Exception e) {
            return 0L;
        }
    }

    /**
     * 获取时间戳
     */
    public static Long getMillis2() {
        return Instant.now().toEpochMilli();
    }

    /* JDK8 */

    /**
     * LocalDateTime转时间戳
     */
    public static Long localDateTime2Millis(LocalDateTime localDateTime) {
        return localDateTime.toInstant(ZoneOffset.ofHours(8)).toEpochMilli();
    }

    /**
     * LocalDate转时间戳
     */
    public static Long localDate2Millis(LocalDate localDate) {
        return LocalDateTime.of(localDate, LocalTime.MIN).toInstant(ZoneOffset.ofHours(8)).toEpochMilli();
    }

    /**
     * Clock转时间戳
     */
    public static Long clock2Millis(Clock clock) {
        return clock.millis();
    }

    /**
     * ZoneDateTIme转时间戳(这个不常用吧~)
     */
    public static Long zoneDateTime2Millis(ZonedDateTime zonedDateTime) {
        return zonedDateTime.toLocalDateTime().toInstant(ZoneOffset.ofHours(8)).toEpochMilli();//!!!好费劲
    }

    /**
     * String转时间戳(JDK8)
     */
    public static Long string2MillisWithJDK8(String dateStr, String formatStr) {
        return LocalDateTime.parse(dateStr, DateTimeFormatter.ofPattern(formatStr)).toInstant(ZoneOffset.ofHours(8)).toEpochMilli();
    }

    /**
     * 获取前月的第一天
     */
    public String getFisrtDayOfMonth() {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Calendar cale = Calendar.getInstance();
        cale = Calendar.getInstance();
        cale.add(Calendar.MONTH, 0);
        cale.set(Calendar.DAY_OF_MONTH, 1);
        String firstday = format.format(cale.getTime());
        System.out.println("当月第一天:" + firstday);
        return firstday;
    }

}