java8实现的处理时间工具类(收藏)

时间:2021-06-01 22:08:23

1. 前期准备

① JDK:1.8

② 编辑器:Eclipse

③ Guava(创建集合的时候回用到,可以还原成JDK1.5的创建方式:new)

2. 全部代码展示

package com.drew.util;

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.MonthDay;
import java.time.Period;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalAdjusters;
import java.util.List;

import com.google.common.collect.Lists;

/**
 * 
 * java1.8 的新特性,解决SimpleDateFormat的线程问题<br>
 * <li>Instant代替 Date,</li>
 * <li>LocalDateTime代替 Calendar,</li>
 * <li>DateTimeFormatter 代替 SimpleDateFormat.</li> 注意:如果是共享变量,则可能会出现线程问题。<br>
 * 
 * @author zero 2019/03/30
 */
public class DateUtil8 {
    // 时间元素
    private static final String YEAR = "year";
    private static final String MONTH = "month";
    private static final String WEEK = "week";
    private static final String DAY = "day";
    private static final String HOUR = "hour";
    private static final String MINUTE = "minute";
    private static final String SECOND = "second";

    // 星期元素
    private static final String MONDAY = "MONDAY";// 星期一
    private static final String TUESDAY = "TUESDAY";// 星期二
    private static final String WEDNESDAY = "WEDNESDAY";// 星期三
    private static final String THURSDAY = "THURSDAY";// 星期四
    private static final String FRIDAY = "FRIDAY";// 星期五
    private static final String SATURDAY = "SATURDAY";// 星期六
    private static final String SUNDAY = "SUNDAY";// 星期日

    // 根据指定格式显示日期和时间
    /** yyyy-MM-dd */
    private static final DateTimeFormatter yyyyMMdd_EN = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    /** yyyy-MM-dd HH */
    private static final DateTimeFormatter yyyyMMddHH_EN = DateTimeFormatter.ofPattern("yyyy-MM-dd HH");
    /** yyyy-MM-dd HH:mm */
    private static final DateTimeFormatter yyyyMMddHHmm_EN = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm");
    /** yyyy-MM-dd HH:mm:ss */
    private static final DateTimeFormatter yyyyMMddHHmmss_EN = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    /** HH:mm:ss */
    private static final DateTimeFormatter HHmmss_EN = DateTimeFormatter.ofPattern("HH:mm:ss");
    /** yyyy年MM月dd日 */
    private static final DateTimeFormatter yyyyMMdd_CN = DateTimeFormatter.ofPattern("yyyy年MM月dd日");
    /** yyyy年MM月dd日HH时 */
    private static final DateTimeFormatter yyyyMMddHH_CN = DateTimeFormatter.ofPattern("yyyy年MM月dd日HH时");
    /** yyyy年MM月dd日HH时mm分 */
    private static final DateTimeFormatter yyyyMMddHHmm_CN = DateTimeFormatter.ofPattern("yyyy年MM月dd日HH时mm分");
    /** yyyy年MM月dd日HH时mm分ss秒 */
    private static final DateTimeFormatter yyyyMMddHHmmss_CN = DateTimeFormatter.ofPattern("yyyy年MM月dd日HH时mm分ss秒");
    /** HH时mm分ss秒 */
    private static final DateTimeFormatter HHmmss_CN = DateTimeFormatter.ofPattern("HH时mm分ss秒");

    // 本地时间显示格式:区分中文和外文显示
    private static final DateTimeFormatter shotDate = DateTimeFormatter.ofLocalizedDate(FormatStyle.SHORT);
    private static final DateTimeFormatter fullDate = DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL);
    private static final DateTimeFormatter longDate = DateTimeFormatter.ofLocalizedDate(FormatStyle.LONG);
    private static final DateTimeFormatter mediumDate = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM);

    /**
     * 获取当前日期
     * 
     * @return yyyy-MM-dd
     * @author zero 2019/03/30
     */
    public static String getNowDate_EN() {
        return String.valueOf(LocalDate.now());
    }

    /**
     * 获取当前日期
     * 
     * @return 字符串yyyy-MM-dd HH:mm:ss
     * @author zero 2019/03/30
     */
    public static String getNowTime_EN() {
        return LocalDateTime.now().format(yyyyMMddHHmmss_EN);
    }

    /** 获取当前时间(yyyy-MM-dd HH) */
    public static String getNowTime_EN_yMdH() {
        return LocalDateTime.now().format(yyyyMMddHH_EN);
    }

    /** 获取当前时间(yyyy年MM月dd日) */
    public static String getNowTime_CN_yMdH() {
        return LocalDateTime.now().format(yyyyMMddHH_CN);
    }

    /** 获取当前时间(yyyy-MM-dd HH:mm) */
    public static String getNowTime_EN_yMdHm() {
        return LocalDateTime.now().format(yyyyMMddHHmm_EN);
    }

    /** 获取当前时间(yyyy年MM月dd日HH时mm分) */
    public static String getNowTime_CN_yMdHm() {
        return LocalDateTime.now().format(yyyyMMddHHmm_CN);
    }

    /** 获取当前时间(HH时mm分ss秒) */
    public static String getNowTime_CN_HHmmss() {
        return LocalDateTime.now().format(HHmmss_CN);
    }

    /**
     * 根据日期格式,获取当前时间
     * 
     * @param formatStr 日期格式<br>
     *        <li>yyyy</li>
     *        <li>yyyy-MM-dd</li>
     *        <li>yyyy-MM-dd HH:mm:ss</li>
     *        <li>HH:mm:ss</li>
     * @return
     * @author zero 2019/03/30
     */
    public static String getTime(String formatStr) {
        return LocalDateTime.now().format(DateTimeFormatter.ofPattern(formatStr));
    }

    /**
     * 获取中文的当前日期
     * 
     * @return yyyy年mm月dd日
     * @author zero 2019/03/30
     */
    public static String getNowDate_CN() {
        return LocalDate.now().format(yyyyMMdd_CN);
    }

    /**
     * 获取中文当前时间
     * 
     * @return yyyy年MM月dd日HH时mm分ss秒
     * @author zero 2019/03/30
     */
    public static String getNowTime_CN() {
        return LocalDateTime.now().format(yyyyMMddHHmmss_CN);
    }

    /**
     * 简写本地当前日期:yy-M-dd<br>
     * 例如:19-3-30为2019年3月30日
     * 
     * @return 字符串yy-M-dd
     * @author zero 2019/03/30
     */
    public static String getNowLocalTime_shot() {
        return LocalDateTime.now().format(shotDate);
    }

    /**
     * 根据当地日期显示格式:yyyy年M月dd日 星期?(中国)
     * 
     * @return 形如:2019年3月30日 星期六
     * @author zero 2019/03/30
     */
    public static String getNowLocalTime_full() {
        return LocalDateTime.now().format(fullDate);
    }

    /**
     * 根据当地显示日期格式:yyyy年M月dd日(中国)
     * 
     * @return 形如 2019年3月30日
     * @author zero 2019/03/30
     */
    public static String getNowLocalTime_long() {
        return LocalDateTime.now().format(longDate);
    }

    /**
     * 根据当地显示日期格式:yyyy-M-dd(中国)
     * 
     * @return 形如:2019-3-30
     * @author zero 2019/03/30
     */
    public static String getNowLocalTime_medium() {
        return LocalDateTime.now().format(mediumDate);
    }

    /**
     * 获取当前日期的节点时间(年,月,周,日,时,分,秒)
     * 
     * @param node 日期中的节点元素(年,月,周,日,时,分,秒)
     * @return 节点数字,如创建此方法的时间:年 2019,月 3,日 30,周 6
     * @author zero 2019/03/30 星期六
     */
    public static Integer getNodeTime(String node) {
        LocalDateTime today = LocalDateTime.now();
        Integer resultNode = null;
        switch (node) {
            case YEAR:
                resultNode = today.getYear();
                break;
            case MONTH:
                resultNode = today.getMonthValue();
                break;
            case WEEK:
                resultNode = transformWeekEN2Num(String.valueOf(today.getDayOfWeek()));
                break;
            case DAY:
                resultNode = today.getDayOfMonth();
                break;
            case HOUR:
                resultNode = today.getHour();
                break;
            case MINUTE:
                resultNode = today.getMinute();
                break;
            case SECOND:
                resultNode = today.getSecond();
                break;
            default:
                // 当前日期是当前年的第几天。例如:2019/1/3是2019年的第三天
                resultNode = today.getDayOfYear();
                break;
        }
        return resultNode;
    }

    /**
     * 将英文星期转换成数字
     * 
     * @param enWeek 英文星期
     * @return int,如果数字小于0,则检查,看是否输入错误 or 入参为null
     * @author zero 2019/03/30
     */
    public static int transformWeekEN2Num(String enWeek) {
        if (MONDAY.equals(enWeek)) {
            return 1;
        } else if (TUESDAY.equals(enWeek)) {
            return 2;
        } else if (WEDNESDAY.equals(enWeek)) {
            return 3;
        } else if (THURSDAY.equals(enWeek)) {
            return 4;
        } else if (FRIDAY.equals(enWeek)) {
            return 5;
        } else if (SATURDAY.equals(enWeek)) {
            return 6;
        } else if (SUNDAY.equals(enWeek)) {
            return 7;
        } else {
            return -1;
        }
    }

    /**
     * 获取当前日期之后(之后)的节点事件<br>
     * <ul>
     * 比如当前时间为:2019-03-30 10:20:30
     * </ul>
     * <li>node="hour",num=5L:2019-03-30 15:20:30</li>
     * <li>node="day",num=1L:2019-03-31 10:20:30</li>
     * <li>node="year",num=1L:2020-03-30 10:20:30</li>
     * 
     * @param node 节点元素(“year”,"month","week","day","huor","minute","second")
     * @param num 第几天(+:之后,-:之前)
     * @return 之后或之后的日期
     * @author zero 2019/03/30
     */
    public static String getAfterOrPreNowTime(String node, Long num) {
        LocalDateTime now = LocalDateTime.now();
        if (HOUR.equals(node)) {
            return now.plusHours(num).format(yyyyMMddHHmmss_EN);
        } else if (DAY.equals(node)) {
            return now.plusDays(num).format(yyyyMMddHHmmss_EN);
        } else if (WEEK.equals(node)) {
            return now.plusWeeks(num).format(yyyyMMddHHmmss_EN);
        } else if (MONTH.equals(node)) {
            return now.plusMonths(num).format(yyyyMMddHHmmss_EN);
        } else if (YEAR.equals(node)) {
            return now.plusYears(num).format(yyyyMMddHHmmss_EN);
        } else if (MINUTE.equals(node)) {
            return now.plusMinutes(num).format(yyyyMMddHHmmss_EN);
        } else if (SECOND.equals(node)) {
            return now.plusSeconds(num).format(yyyyMMddHHmmss_EN);
        } else {
            return "Node is Error!";
        }
    }

    /**
     * 获取与当前日期相距num个之后(之前)的日期<br>
     * <ul>
     * 比如当前时间为:2019-03-30 10:20:30的格式日期
     * <li>node="hour",num=5L:2019-03-30 15:20:30</li>
     * <li>node="day",num=1L:2019-03-31 10:20:30</li>
     * <li>node="year",num=1L:2020-03-30 10:20:30</li>
     * </ul>
     * 
     * @param dtf 格式化当前时间格式(dtf = yyyyMMddHHmmss_EN)
     * @param node 节点元素(“year”,"month","week","day","huor","minute","second")
     * @param num (+:之后,-:之前)
     * @return 之后之前的日期
     * @author zero 2019/03/30
     */
    public static String getAfterOrPreNowTimePlus(DateTimeFormatter dtf, String node, Long num) {
        LocalDateTime now = LocalDateTime.now();
        if (HOUR.equals(node)) {
            return now.plusHours(num).format(dtf);
        } else if (DAY.equals(node)) {
            return now.plusDays(num).format(dtf);
        } else if (WEEK.equals(node)) {
            return now.plusWeeks(num).format(dtf);
        } else if (MONTH.equals(node)) {
            return now.plusMonths(num).format(dtf);
        } else if (YEAR.equals(node)) {
            return now.plusYears(num).format(dtf);
        } else if (MINUTE.equals(node)) {
            return now.plusMinutes(num).format(dtf);
        } else if (SECOND.equals(node)) {
            return now.plusSeconds(num).format(dtf);
        } else {
            return "Node is Error!";
        }
    }

    /**
     * 当前时间的hour,minute,second之后(之前)的时刻
     * 
     * @param node 时间节点元素(hour,minute,second)
     * @param num 之后(之后)多久时,分,秒(+:之后,-:之前)
     * @return HH:mm:ss 字符串
     * @author zero 2019/03/30
     */
    public static String getAfterOrPreNowTimeSimp(String node, Long num) {
        LocalTime now = LocalTime.now();
        if (HOUR.equals(node)) {
            return now.plusHours(num).format(HHmmss_EN);
        } else if (MINUTE.equals(node)) {
            return now.plusMinutes(num).format(HHmmss_EN);
        } else if (SECOND.equals(node)) {
            return now.plusSeconds(num).format(HHmmss_EN);
        } else {
            return "Node is Error!";
        }
    }

    /**
     * 检查重复事件,比如生日。TODO This is a example.
     * 
     * @param birthDayStr
     * @return
     * @author zero 2019/03/31
     */
    public static boolean isBirthday(int month, int dayOfMonth) {
        MonthDay birthDay = MonthDay.of(month, dayOfMonth);
        MonthDay curMonthDay = MonthDay.from(LocalDate.now());// MonthDay只存储了月、日。
        if (birthDay.equals(curMonthDay)) {
            return true;
        }
        return false;
    }

    /**
     * 获取当前日期第index日之后(之前)的日期(yyyy-MM-dd)
     * 
     * @param index 第index天
     * @return 日期字符串:yyyy-MM-dd
     * @author zero 2019/03/31
     */
    public static String getAfterOrPreDayDate(int index) {
        return LocalDate.now().plus(index, ChronoUnit.DAYS).format(yyyyMMdd_EN);
    }

    /**
     * 获取当前日期第index周之前(之后)的日期(yyyy-MM-dd)
     * 
     * @param index 第index周(+:之后,-:之前)
     * @return 日期字符串:yyyy-MM-dd
     * @author zero 2019/03/31
     */
    public static String getAfterOrPreWeekDate(int index) {
        return LocalDate.now().plus(index, ChronoUnit.WEEKS).format(yyyyMMdd_EN);
    }

    /**
     * 获取当前日期第index月之前(之后)的日期(yyyy-MM-dd)
     * 
     * @param index 第index月(+:之后,-:之前)
     * @return 日期字符串:yyyy-MM-dd
     * @author zero 2019/03/31
     */
    public static String getAfterOrPreMonthDate(int index) {
        return LocalDate.now().plus(index, ChronoUnit.MONTHS).format(yyyyMMdd_EN);
    }

    /**
     * 获取当前日期第index年之前(之后)的日期(yyyy-MM-dd)
     * 
     * @param index 第index年(+:之后,-:之前)
     * @return 日期字符串:yyyy-MM-dd
     * @author zero 2019/03/31
     */
    public static String getAfterOrPreYearDate(int index) {
        return LocalDate.now().plus(index, ChronoUnit.YEARS).format(yyyyMMdd_EN);
    }

    /**
     * 获取指定日期之前之后的第index的日,周,月,年的日期
     * 
     * @param date 指定日期格式:yyyy-MM-dd
     * @param node 时间节点元素(日周月年)
     * @param index 之前之后第index个日期
     * @return yyyy-MM-dd 日期字符串
     * @author zero 2019/03/31
     */
    public static String getAfterOrPreDate(String date, String node, int index) {
        date = date.trim();
        if (DAY.equals(node)) {
            return LocalDate.parse(date).plus(index, ChronoUnit.DAYS).format(yyyyMMdd_EN);
        } else if (WEEK.equals(node)) {
            return LocalDate.parse(date).plus(index, ChronoUnit.WEEKS).format(yyyyMMdd_EN);
        } else if (MONTH.equals(node)) {
            return LocalDate.parse(date).plus(index, ChronoUnit.MONTHS).format(yyyyMMdd_EN);
        } else if (YEAR.equals(node)) {
            return LocalDate.parse(date).plus(index, ChronoUnit.YEARS).format(yyyyMMdd_EN);
        } else {
            return "Wrong date format!";
        }
    }

    /**
     * 检测:输入年份是否是闰年?
     * 
     * @param date 日期格式:yyyy-MM-dd
     * @return true:闰年,false:平年
     * @author zero 2019/03/31
     */
    public static boolean isLeapYear(String date) {
        return LocalDate.parse(date.trim()).isLeapYear();
    }

    /**
     * 计算两个日期字符串之间相差多少个周期(天,月,年)
     * 
     * @param date1 yyyy-MM-dd
     * @param date2 yyyy-MM-dd
     * @param node 三者之一:(day,month,year)
     * @return 相差多少周期
     * @author zero 2019/03/31
     */
    public static int peridCount(String date1, String date2, String node) {
        date1 = date1.trim();
        date2 = date2.trim();
        if (DAY.equals(node)) {
            return Period.between(LocalDate.parse(date1), LocalDate.parse(date2)).getDays();
        } else if (MONTH.equals(node)) {
            return Period.between(LocalDate.parse(date1), LocalDate.parse(date2)).getMonths();
        } else if (YEAR.equals(node)) {
            return Period.between(LocalDate.parse(date1), LocalDate.parse(date2)).getYears();
        } else {
            return 0;
        }
    }

    /**
     * 切割日期。按照周期切割成小段日期段。例如: <br>
     * 
     * @param startDate 开始日期(yyyy-MM-dd)
     * @param endDate 结束日期(yyyy-MM-dd)
     * @param period 周期(天,周,月,年)
     * @return 切割之后的日期集合
     * @author zero 2019/04/02
     * @example
     *          <li>startDate="2019-02-28",endDate="2019-03-05",period="day"</li>
     *          <li>结果为:[2019-02-28, 2019-03-01, 2019-03-02, 2019-03-03, 2019-03-04, 2019-03-05]</li><br>
     *          <li>startDate="2019-02-28",endDate="2019-03-25",period="week"</li>
     *          <li>结果为:[2019-02-28,2019-03-06, 2019-03-07,2019-03-13, 2019-03-14,2019-03-20,
     *          2019-03-21,2019-03-25]</li><br>
     *          <li>startDate="2019-02-28",endDate="2019-05-25",period="month"</li>
     *          <li>结果为:[2019-02-28,2019-02-28, 2019-03-01,2019-03-31, 2019-04-01,2019-04-30,
     *          2019-05-01,2019-05-25]</li><br>
     *          <li>startDate="2019-02-28",endDate="2020-05-25",period="year"</li>
     *          <li>结果为:[2019-02-28,2019-12-31, 2020-01-01,2020-05-25]</li><br>
     */
    public static List<String> getPieDateRange(String startDate, String endDate, String period) {
        List<String> result = Lists.newArrayList();
        LocalDate end = LocalDate.parse(endDate, yyyyMMdd_EN);
        LocalDate start = LocalDate.parse(startDate, yyyyMMdd_EN);
        LocalDate tmp = start;
        switch (period) {
            case DAY:
                while (start.isBefore(end) || start.isEqual(end)) {
                    result.add(start.toString());
                    start = start.plusDays(1);
                }
                break;
            case WEEK:
                while (tmp.isBefore(end) || tmp.isEqual(end)) {
                    if (tmp.plusDays(6).isAfter(end)) {
                        result.add(tmp.toString() + "," + end);
                    } else {
                        result.add(tmp.toString() + "," + tmp.plusDays(6));
                    }
                    tmp = tmp.plusDays(7);
                }
                break;
            case MONTH:
                while (tmp.isBefore(end) || tmp.isEqual(end)) {
                    LocalDate lastDayOfMonth = tmp.with(TemporalAdjusters.lastDayOfMonth());
                    if (lastDayOfMonth.isAfter(end)) {
                        result.add(tmp.toString() + "," + end);
                    } else {
                        result.add(tmp.toString() + "," + lastDayOfMonth);
                    }
                    tmp = lastDayOfMonth.plusDays(1);
                }
                break;
            case YEAR:
                while (tmp.isBefore(end) || tmp.isEqual(end)) {
                    LocalDate lastDayOfYear = tmp.with(TemporalAdjusters.lastDayOfYear());
                    if (lastDayOfYear.isAfter(end)) {
                        result.add(tmp.toString() + "," + end);
                    } else {
                        result.add(tmp.toString() + "," + lastDayOfYear);
                    }
                    tmp = lastDayOfYear.plusDays(1);
                }
                break;
            default:
                break;
        }
        return result;
    }

    /**
     * 指定日期月的最后一天(yyyy-MM-dd)
     * 
     * @param curDate 日期格式(yyyy-MM-dd)
     * @param firstOrLast true:第一天,false:最后一天
     * @return
     * @author zero 2019/04/13
     */
    public static String getLastDayOfMonth(String curDate, boolean firstOrLast) {
        if (firstOrLast) {
            return LocalDate.parse(curDate, yyyyMMdd_EN).with(TemporalAdjusters.firstDayOfMonth()).toString();
        } else {
            return LocalDate.parse(curDate, yyyyMMdd_EN).with(TemporalAdjusters.lastDayOfMonth()).toString();
        }
    }

    /**
     * 指定日期年的最后一天(yyyy-MM-dd)
     * 
     * @param curDate 指定日期(格式:yyyy-MM-dd)
     * @param firstOrLast true:第一天,false:最后一天
     * @return
     * @author zero 2019/04/13
     */
    public static String getLastDayOfYear(String curDate, boolean firstOrLast) {
        if (firstOrLast) {
            return LocalDate.parse(curDate, yyyyMMdd_EN).with(TemporalAdjusters.firstDayOfYear()).toString();
        } else {
            return LocalDate.parse(curDate, yyyyMMdd_EN).with(TemporalAdjusters.lastDayOfYear()).toString();
        }
    }

    /**
     * 获取下一个星期的日期
     * 
     * @param curDay yyyy-MM-dd
     * @param dayOfWeek monday:1~sunday:7
     * @param isContainCurDay 是否包含当天,true:是,false:不包含
     * @return 日期(yyyy-MM-dd)
     * @author zero 2019/04/02
     */
    public static String getNextWeekDate(String curDay, int dayOfWeek, boolean isContainCurDay) {
        dayOfWeek = dayOfWeek < 1 || dayOfWeek > 7 ? 1 : dayOfWeek;
        if (isContainCurDay) {
            return LocalDate.parse(curDay).with(TemporalAdjusters.nextOrSame(DayOfWeek.of(dayOfWeek))).toString();
        } else {
            return LocalDate.parse(curDay).with(TemporalAdjusters.next(DayOfWeek.of(dayOfWeek))).toString();
        }
    }

    /**
     * 获取上一个星期的日期
     * 
     * @param curDay 指定日期(yyyy-MM-dd)
     * @param dayOfWeek 数字范围(monday:1~sunday:7)
     * @param isCurDay 是否包含当天,true:是,false:不包含
     * @return 日期(yyyy-MM-dd)
     * @author zero 2019/04/02
     */
    public static String getPreWeekDate(String curDay, int dayOfWeek, boolean isCurDay) {
        dayOfWeek = dayOfWeek < 1 || dayOfWeek > 7 ? 1 : dayOfWeek;
        if (isCurDay) {
            return LocalDate.parse(curDay).with(TemporalAdjusters.previousOrSame(DayOfWeek.of(dayOfWeek))).toString();
        } else {
            return LocalDate.parse(curDay).with(TemporalAdjusters.previous(DayOfWeek.of(dayOfWeek))).toString();
        }
    }

    /**
     * 获取指定日期当月的最后或第一个星期日期
     * 
     * @param curDay 指定日期(yyyy-MM-dd)
     * @param dayOfWeek 周几(1~7)
     * @param lastOrFirst true:最后一个,false本月第一个
     * @return 日期(yyyy-MM-dd)
     * @author zero 2019/04/02
     */
    public static String getFirstOrLastWeekDate(String curDay, int dayOfWeek, boolean lastOrFirst) {
        dayOfWeek = dayOfWeek < 1 || dayOfWeek > 7 ? 1 : dayOfWeek;
        if (lastOrFirst) {
            return LocalDate.parse(curDay).with(TemporalAdjusters.lastInMonth(DayOfWeek.of(dayOfWeek))).toString();
        } else {
            return LocalDate.parse(curDay).with(TemporalAdjusters.firstInMonth(DayOfWeek.of(dayOfWeek))).toString();
        }
    }

    public static void main(String[] args) {
        System.out.println("===================");
        // String curDate = "2019-04-10"; // 指定日期
        // System.out.println(getLastDayOfMonth(curDate, true));
        // System.out.println(getLastDayOfMonth(curDate, false));
        // System.out.println(getLastDayOfYear(curDate, true));
        // System.out.println(getLastDayOfYear(curDate, false));
        // System.out.println("===================");
        // String startDate = "2019-02-28", endDate = "2019-03-05", period = DAY;
        // System.out.println(getPieDateRange(startDate, endDate, period));
        // System.out.println("===================");
        // System.out.println(getNextWeekDate("2019-02-28", 1, false));
        // System.out.println(getPieDateRange("2019-12-28", "2020-03-01", DAY));
        // System.out.println("===================");
        // System.out.println(getFirstOrLastWeekDate("2019-04-02", 0, false));
        // System.out.println(getPreWeekDate("2019-04-02", 2, false));
        // System.out.println(getNextWeekDate("2019-04-02", 2, false));
        // System.out.println("===================");
        // System.out.println("当前时间戳:" + Instant.now());
        // System.out.println("当前时间:" + LocalDateTime.now());
        // System.out.println("===================");
        // System.out.println(peridCount("2019-01-30", "2019-03-31", MONTH));
        // System.out.println(isLeapYear("2019-03-31"));
        // System.out.println(LocalDate.now().isLeapYear());
        // System.out.println("===================");
        // System.out.println(getAfterOrPreDate("2019-03-31", WEEK, -1));
        // System.out.println(getAfterOrPreDayDate(-5));
        // System.out.println(getAfterOrPreDayDate(-3));
        // System.out.println(getAfterOrPreDayDate(6));
        // System.out.println(getAfterOrPreYearDate(6));
        // System.out.println(getAfterOrPreWeekDate(1));
        // System.out.println("===================");
        // clock();
        // isBirthday(7, 13);
        // LocalDate date0 = LocalDate.of(2019, Month.OCTOBER, 31);
        // LocalDate date = LocalDate.of(2019, 3, 31);
        // System.out.println(date0.equals(LocalDate.now()));
        // System.out.println(date.getYear() + "-" + date.getMonthValue() + "-" + date.getDayOfMonth());
        // System.out.println(getNowTime_EN());
        // System.out.println(getAfterNowTimeSimp(SECOND, 5L));
        // System.out.println("===================");
        // System.out.println(getAfterNowTime(SECOND, 5L));
        // System.out.println(getAfterNowTimePlus(yyyyMMddHHmm_EN, SECOND, 5L));
        // System.out.println("===================");
        // System.out.println(getNowDate_EN());
        // System.out.println(getNowDate_CN());
        // System.out.println(getTime("HH:mm:ss"));
        // System.out.println(getNowTime_EN());
        // System.out.println(getNowTime_CN());
        // System.out.println(getNowLocalTime_shot());
        // System.out.println(getNowLocalTime_full());
        // System.out.println(getNowLocalTime_long());
        // System.out.println(getNowLocalTime_medium());
        // System.out.println(getNodeTime("week"));
        // System.out.println(transformWeekEN2Num(null));
        // System.out.println("===================");
    }

}

3. 测试使用说明

测试时,将注释按照等号线一部分一部分取消。(块中方法相关联便于理解)