/**
     * LocalDate的初始化方法
     * 此處單元測試的注解是采用:org.junit.Test
     */
    @Test
    public void init(){
        //1.創(chuàng)建LocalDate,LocalDate對(duì)象直接調(diào)用now(),獲取到當(dāng)前日期
        LocalDate localDateNow = LocalDate.now();
        System.out.println("1.直接調(diào)用now()創(chuàng)建：" + localDateNow);
        //2.直接根據(jù)（年月日）創(chuàng)建,如：2021-05-20
        LocalDate localDateOf = LocalDate.of(2021, 5, 20);
        System.out.println("2.根據(jù)年月日創(chuàng)建：" + localDateOf);
        //3.直接根據(jù)某一年的某一天創(chuàng)建,如 2021年中第200天
        LocalDate localDateOfYearDay = LocalDate.ofYearDay(2021, 200);
        System.out.println("3.根據(jù)某一年的某一天創(chuàng)建：" + localDateOfYearDay);
        //4.根據(jù)java.time.temporal.TemporalAccessor創(chuàng)建(包括LocalDate,LocalDateTime等等)
        LocalDate localDateFrom = LocalDate.from(LocalDate.now());
        System.out.println("4.根據(jù)TemporalAccessor創(chuàng)建：" + localDateFrom);
        //5.根據(jù)時(shí)間字符串轉(zhuǎn)化創(chuàng)建,調(diào)用parse(CharSequence text)方法,此方法只支持yyyy-MM-dd格式的值
        LocalDate localDateParse = LocalDate.parse("2021-05-11");
        System.out.println("5.根據(jù)時(shí)間字符串轉(zhuǎn)化創(chuàng)建:" + localDateParse);
        //6.根據(jù)時(shí)間字符串轉(zhuǎn)化創(chuàng)建,調(diào)用parse(CharSequence text, DateTimeFormatter formatter)方法,此時(shí)的text可以根據(jù)formatter多變
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");
        LocalDate localDateParse2 = LocalDate.parse("20210515", formatter);
        System.out.println("6.根據(jù)時(shí)間字符串轉(zhuǎn)化創(chuàng)建:" + localDateParse2);
    }

   /**
     * LocalDate的常用使用方法
     * 此處單元測試的注解是采用:org.junit.Test
     */
    @Test
    public void usage() {
        //此處采用LocalDate對(duì)象直接調(diào)用now(),獲取到當(dāng)前日期,注意：如果使用我的實(shí)例，結(jié)果會(huì)不一樣，因?yàn)長ocalDate.now()是調(diào)用時(shí)的日期
        LocalDate currentDate = LocalDate.now();
        //1.獲取年、月、日、星期幾、月中天、年中天、月數(shù)
        System.out.println("------------------1.獲取年、月、日、星期幾、月中天、年中天、月數(shù)-----------------------");
        System.out.println("1.獲取到的當(dāng)前日期：" + currentDate);
        System.out.println("1.獲取到的年：" + currentDate.getYear());
        System.out.println("1.獲取到的月：" + currentDate.getMonthValue());
        System.out.println("1.獲取到的一月中的哪一天：" + currentDate.getDayOfMonth());
        System.out.println("1.獲取到的一周中的星期幾：" + currentDate.getDayOfWeek().getValue());
        System.out.println("1.獲取到的一年的第多少天：" + currentDate.getDayOfYear());
        System.out.println("1.獲取到的一年有多少天：" + currentDate.lengthOfYear());
        System.out.println("1.獲取到的一年有多少月：" + currentDate.lengthOfMonth());
        //2.時(shí)間的計(jì)算
        System.out.println("-----------------2.時(shí)間的計(jì)算,主要是加減法------------------------");
        System.out.println("2.獲取到的當(dāng)前日期：" + currentDate);
        System.out.println("2.加法，當(dāng)前日期上加2年：" + currentDate.plusYears(2));
        System.out.println("2.加法，當(dāng)前日期上加3個(gè)月：" + currentDate.plusMonths(3));
        System.out.println("2.加法，當(dāng)前日期上加20天：" + currentDate.plusDays(20));
        System.out.println("2.加法，當(dāng)前日期上加一周：" + currentDate.plusWeeks(1));
        System.out.println("2.減法，當(dāng)前日期上減2年：" + currentDate.minusYears(2));
        System.out.println("2.減法，當(dāng)前日期上減3個(gè)月：" + currentDate.minusMonths(3));
        System.out.println("2.減法，當(dāng)前日期上減20天：" + currentDate.minusDays(20));
        System.out.println("2.減法，當(dāng)前日期上減一周：" + currentDate.minusWeeks(1));
        //3.時(shí)間的判斷及轉(zhuǎn)化
        System.out.println("-----------------3.時(shí)間的判斷及格式化(格式化的類型很多)------------------------");
        //新建一個(gè)格式化類型
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");
        //新創(chuàng)建一個(gè)LocalDate日期進(jìn)行比較
        LocalDate localDateOf = LocalDate.of(2020, 5, 20);
        System.out.println("3.當(dāng)前日期轉(zhuǎn)成yyyyMMdd型的字符串：" + currentDate.format(formatter));
        System.out.println("3.當(dāng)前日期是否在一個(gè)日期之后：" + currentDate.isAfter(localDateOf));
        System.out.println("3.當(dāng)前日期是否在一個(gè)日期之前：" + currentDate.isBefore(localDateOf));
        System.out.println("3.當(dāng)前日期是否是閏年：" + currentDate.isLeapYear());
        System.out.println("3.2020-05-20是否是閏年：" + localDateOf.isLeapYear());
        //4.根據(jù)指定數(shù)據(jù)獲取日期或者時(shí)間(LocalTime)
        System.out.println("-----------------4.根據(jù)指定數(shù)據(jù)獲取日期或者時(shí)間(LocalTime)------------------------");
        System.out.println("4.獲取到的當(dāng)前日期：" + currentDate);
        System.out.println("4.修改年數(shù)為1999年：" + currentDate.withYear(1999));
        System.out.println("4.修改月數(shù)為10月：" + currentDate.withMonth(10));
        System.out.println("4.修改天數(shù)為當(dāng)月12日：" + currentDate.withDayOfMonth(12));
        System.out.println("4.獲取到的當(dāng)前日期的開始時(shí)間：" + currentDate.atStartOfDay());
        System.out.println("4.根據(jù)指定的時(shí)、分、秒獲取時(shí)間：" + currentDate.atTime(12, 23, 45));
        System.out.println("4.根據(jù)時(shí)間LocalTime對(duì)象獲取時(shí)間：" + currentDate.atTime(LocalTime.now()));
    }

    /**
     * LocalTime的初始化方法
     * 此處單元測試的注解是采用:org.junit.Test
     */
    @Test
    public void init() {
        //1.LocalTime,LocalTime對(duì)象直接調(diào)用now(),獲取到當(dāng)前時(shí)間
        LocalTime now = LocalTime.now();
        System.out.println("1.獲取到的當(dāng)前時(shí)間：" + now);
        //2.根據(jù)指定的時(shí)分秒生成時(shí)間
        LocalTime localTimeOf = LocalTime.of(23, 59, 59);
        System.out.println("2.根據(jù)指定的時(shí)分秒生成時(shí)間：" + localTimeOf);
        //3.根據(jù)指定的時(shí)分秒生成時(shí)間
        LocalTime localTimeParse = LocalTime.parse("12:23:45");
        System.out.println("3.根據(jù)指定的時(shí)分秒生成時(shí)間：" + localTimeParse);
        //4.根據(jù)指定的時(shí)分秒和格式化類型生成時(shí)間
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HHmmss");//注意：HH是24小時(shí)制，hh是12小時(shí)制，時(shí)間類型的不要出現(xiàn)年月日如：yyyyMMdd
        LocalTime localTimeParseWithFormatter = LocalTime.parse("102008", formatter);
        System.out.println("4.根據(jù)指定的時(shí)分秒和格式化類型生成時(shí)間：" + localTimeParseWithFormatter);
        //5.根據(jù)時(shí)間對(duì)象TemporalAccessor生成
        LocalTime initTime = LocalTime.of(11, 59, 59);
        System.out.println("5.根據(jù)時(shí)間對(duì)象TemporalAccessor生成:" + LocalTime.from(initTime));
    }

/**
     * LocalTime的常用使用方法
     * 此處單元測試的注解是采用:org.junit.Test
     * 和LocalDate的操作方法差不多
     */
    @Test
    public void usage() {
        //此處采用LocalTime對(duì)象直接調(diào)用now(),獲取到當(dāng)前時(shí)間,注意：如果使用我的實(shí)例，結(jié)果會(huì)不一樣，因?yàn)長ocalTime.now()是調(diào)用時(shí)的時(shí)間
        LocalTime currentTime = LocalTime.now();
        //1.獲取時(shí)、分、秒
        System.out.println("------------------1.獲取時(shí)、分、秒-----------------------");
        System.out.println("1.獲取到的當(dāng)前時(shí)間：" + currentTime);
        System.out.println("1.獲取當(dāng)前時(shí)間的小時(shí)：" + currentTime.getHour());
        System.out.println("1.獲取當(dāng)前時(shí)間的分鐘：" + currentTime.getMinute());
        System.out.println("1.獲取當(dāng)前時(shí)間的秒：" + currentTime.getSecond());
        System.out.println("1.獲取當(dāng)前時(shí)間的秒：" + currentTime.getNano());
        //2.時(shí)間的加減
        System.out.println("------------------2.時(shí)間的加減-----------------------");
        System.out.println("2.獲取到的當(dāng)前時(shí)間：" + currentTime);
        System.out.println("2.加法：當(dāng)前時(shí)間上增加1小時(shí)" + currentTime.plusHours(1));
        System.out.println("2.加法：當(dāng)前時(shí)間上增加10分鐘" + currentTime.plusMinutes(10));
        System.out.println("2.加法：當(dāng)前時(shí)間上增加20秒" + currentTime.plusSeconds(20));
        System.out.println("2.減法：當(dāng)前時(shí)間上減加2小時(shí)" + currentTime.minusHours(2));
        System.out.println("2.減法：當(dāng)前時(shí)間上減加30分鐘" + currentTime.minusMinutes(30));
        System.out.println("2.減法：當(dāng)前時(shí)間上減加5秒" + currentTime.minusSeconds(5));
        System.out.println("------------------3.時(shí)間的判斷及轉(zhuǎn)化-----------------------");
        //初始化一個(gè)新的時(shí)間
        LocalTime initTime = LocalTime.of(13, 59, 59);
        System.out.println("3.獲取到的當(dāng)前時(shí)間：" + currentTime);
        System.out.println("3.新初始化的時(shí)間：" + initTime);
        System.out.println("3.判斷當(dāng)前時(shí)間是否是一個(gè)時(shí)間之后：" + currentTime.isAfter(initTime));
        System.out.println("3.判斷當(dāng)前時(shí)間是否是一個(gè)時(shí)間之前：" + currentTime.isBefore(initTime));
        System.out.println("3.修改小時(shí)數(shù)為12：" + currentTime.withHour(12));
        System.out.println("3.修改分鐘數(shù)為12：" + currentTime.withMinute(12));
        System.out.println("3.修改秒數(shù)為12：" + currentTime.withSecond(12));
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");
        LocalTime parseTime = LocalTime.parse("11:45:28", formatter);
        System.out.println("3.根據(jù)指定的時(shí)分秒和格式化類型生成時(shí)間：" + parseTime);
    }

/**
     * LocalDateTime的初始化方法
     * 此處單元測試的注解是采用:org.junit.Test
     */
    @Test
    public void init() {
        //1.LocalDateTime對(duì)象直接調(diào)用now(),獲取到當(dāng)前時(shí)間
        LocalDateTime localDateTime = LocalDateTime.now();
        System.out.println("1.LocalDateTime對(duì)象直接調(diào)用now()獲取到的時(shí)間：" + localDateTime);
        //2.根據(jù)年月日時(shí)分秒構(gòu)造（此處方法比較多，不一一介紹）
        LocalDateTime localDateTimeOf = LocalDateTime.of(2021, 5, 10, 18, 30, 26);
        System.out.println("2.根據(jù)年月日時(shí)分秒構(gòu)造獲取到的時(shí)間：" + localDateTimeOf);
        //3.根據(jù)LocalDate和LocalTime得到(在有日期和時(shí)間的情況下可以使用)
        LocalDateTime of = LocalDateTime.of(LocalDate.now(), LocalTime.now());
        System.out.println("3.根據(jù)LocalDate和LocalTime得到:" + of);
        //4.LocalDate指定一個(gè)LocalTime(LocalDate只有年月日)
        LocalTime localTimeInit = LocalTime.of(14, 25, 25);
        LocalDateTime localDateWithLocalTime = LocalDate.now().atTime(localTimeInit);
        System.out.println("4.LocalDate指定一個(gè)LocalTime:" + localDateWithLocalTime);
        //5.LocalTime指定一個(gè)LocalDate(LocalTime只有時(shí)分秒)
        LocalDate localDateInit = LocalDate.of(1998, 10, 1);
        LocalDateTime localTimeWithLocalDate = LocalTime.now().atDate(localDateInit);
        System.out.println("5.LocalTime指定一個(gè)LocalDate:" + localTimeWithLocalDate);
    }

    /**
     * LocalDateTime的常用使用方法
     * 此處單元測試的注解是采用:org.junit.Test
     */
    @Test
    public void usage() {
        //1.根據(jù)LocalDateTime獲取LocalDate
        LocalDateTime currentTime = LocalDateTime.now();
        System.out.println("1.根據(jù)LocalDateTime獲取LocalDate: " + currentTime.toLocalDate());
        //2.根據(jù)LocalDateTime獲取LocalTime
        System.out.println("2.根據(jù)LocalDateTime獲取LocalTime: " + currentTime.toLocalTime());
        System.out.println("------------------3.時(shí)間的加減法及修改-----------------------");
        //3.LocalDateTime的加減法包含了LocalDate和LocalTime的所有加減,上面說過,這里就只做簡單介紹
        System.out.println("3.當(dāng)前時(shí)間：" + currentTime);
        System.out.println("3.當(dāng)前時(shí)間加5年：" + currentTime.plusYears(5));
        System.out.println("3.當(dāng)前時(shí)間加2個(gè)月：" + currentTime.plusMonths(2));
        System.out.println("3.當(dāng)前時(shí)間減2天：" + currentTime.minusDays(2));
        System.out.println("3.當(dāng)前時(shí)間減5個(gè)小時(shí)：" + currentTime.minusHours(5));
        System.out.println("3.當(dāng)前時(shí)間加5分鐘：" + currentTime.plusMinutes(5));
        System.out.println("3.當(dāng)前時(shí)間加20秒：" + currentTime.plusSeconds(20));
        //還可以靈活運(yùn)用比如：向后加一年，向前減一天，向后加2個(gè)小時(shí)，向前減5分鐘，可以進(jìn)行連寫
        System.out.println("3.同時(shí)修改(向后加一年，向前減一天，向后加2個(gè)小時(shí)，向前減5分鐘)：" + currentTime.plusYears(1).minusDays(1).plusHours(2).minusMinutes(5));
        System.out.println("3.修改年為2025年：" + currentTime.withYear(2025));
        System.out.println("3.修改月為12月：" + currentTime.withMonth(12));
        System.out.println("3.修改日為27日：" + currentTime.withDayOfMonth(27));
        System.out.println("3.修改小時(shí)為12：" + currentTime.withHour(12));
        System.out.println("3.修改分鐘為12：" + currentTime.withMinute(12));
        System.out.println("3.修改秒為12：" + currentTime.withSecond(12));
        System.out.println("------------------4.時(shí)間的轉(zhuǎn)化及其他-----------------------");
        //4.時(shí)間的格式化及其他
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        LocalDateTime parse = LocalDateTime.parse("2020-09-18 14:55:44", formatter);
        System.out.println("4.時(shí)間字符串轉(zhuǎn)為時(shí)間：" + parse);
        LocalDate localDate = LocalDate.now();
        System.out.println("4.所屬年份的第一天：" + localDate.with(firstDayOfYear()));
        System.out.println("4.所屬年份的最后一天：" + localDate.with(lastDayOfYear()));
        System.out.println("4.所屬年份的下一年的第一天：" + localDate.with(firstDayOfNextYear()));
        System.out.println("4.所屬月份的第一天：" + localDate.with(firstDayOfMonth()));
        System.out.println("4.所屬月份的最后一天：" + localDate.with(lastDayOfMonth()));
        System.out.println("4.所屬月份的下個(gè)月的第一天：" + localDate.with(firstDayOfNextMonth()));
    }