java8中的时间处理

java8中关于时间的处理整理

package com.xb.utils;

import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.util.Date;

/**
 * Author Mr. Guo
 * Create 2019/2/22 - 13:59
 */
public class dateFormatUtils {
    //获取当天的日期(2019-02-26)
    public static LocalDate getCurrentDate = LocalDate.now();
    //获取当前的时间(18:41:32)
    public static LocalTime getCurrentTime = LocalTime.now().withNano(0);

    //指定时间
    public static LocalTime time(int hour, int minute, int second) {
        return LocalTime.of(hour, minute, second);
    }

    public static LocalTime time2(String time) {
        return LocalTime.parse(time);
    }

    //当前时间增加x小时
    public static LocalTime nowTimePlusxHour(int incr) {
        return dateFormatUtils.getCurrentTime.plusHours(incr);
    }

    public static LocalTime nowTimePlusxHosr(int incr) {
        return dateFormatUtils.getCurrentTime.plus(incr, ChronoUnit.HOURS);
    }

    //生日检查或账单日检查
    public static boolean judgeBirthday(int year, int month, int day, int cyear, int cmonth, int cday) {
        LocalDate birthday = LocalDate.of(year, month, day);
        MonthDay birthdayMd = MonthDay.of(birthday.getMonth(), birthday.getDayOfMonth());
        MonthDay today = MonthDay.from(LocalDate.of(cyear, cmonth, cday));
        return today.equals(birthdayMd);
    }

    //比较当前日期是否在指定日期之后
    public static boolean isAfterOrBefore(int year, int month, int day) {
        LocalDate today = LocalDate.now();
        LocalDate specifyDate = LocalDate.of(year, month, day);
        return today.isAfter(specifyDate);
    }

    //获取当前的时区(Asia/Shanghai)
    public static ZoneId currentZone = ZoneId.systemDefault();

    //查看指定时区的当前时间
    public static LocalDateTime pointedDateTime(String zone) {
        return LocalDateTime.now(ZoneId.of(zone));
    }

    //获取带有时区的时间(2019-02-26T19:21:51.669+08:00[Asia/Shanghai])
    public static ZonedDateTime zonedDateTime(String zone) {
        return ZonedDateTime.now(ZoneId.of(zone));
    }

    //比较两个日期的时间差
    public static int periodDate(int syear, int smonth, int sday, String condition) {
        LocalDate today = LocalDate.now();
        LocalDate specifyDate = LocalDate.of(syear, smonth, sday);
        Period period = Period.between(specifyDate, today);
        if ("day".equals(condition))
            return (int) specifyDate.until(today, ChronoUnit.DAYS);
        if ("month".equals(condition))
            return period.getMonths();
        if ("year".equals(condition))
            return period.getYears();
        return -1;
    }

    //日期时间格式解析、格式化
    public static LocalDate dateParse(String specifyDate) {
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.BASIC_ISO_DATE;
        return LocalDate.parse(specifyDate, dateTimeFormatter);
    }

    //转为自定义格式的时间
    public static String dateTimeFormatter(String regxDate, int cyear, int month, int cday, boolean ConverCurrentDate) {
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(regxDate);
        if (ConverCurrentDate)
            return dateTimeFormatter.format(LocalDate.now());
        return dateTimeFormatter.format(LocalDate.of(cyear, month, cday));
    }

    //时间类与Date类的相互转换
    public static Instant DateConverInstant() {
        Instant instant = Instant.now();
        Date date = Date.from(instant);
        Instant instant1 = date.toInstant();
        return instant1;
    }

    //date转换为LocalDateTime
    public static LocalDateTime DateToLocalDateTime() {
        Date date = new Date();
        return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
    }

    //LocalDateTime转换为Date
    public static Date LocalDateTimeToDate() {
        LocalDateTime localDateTime = LocalDateTime.now();
        Instant instant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
        return Date.from(instant);
    }

    //LocalDate转Date
    //LocalDate不包含时间，所以转换date的时候，会默认转为当天时间的，00:00:00
    public static Date LocalDateToDate() {
        LocalDate localDate = LocalDate.now();
        Instant instant = localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant();
        return Date.from(instant);
    }

}