常用类-LocalDate、LocalTime、LocalDateTime - ToB企服应用市场:ToB评测及商务社交产业平台

@Test
public void test1(){
//实例化：now()获取当前日期、时间、日期 + 时间
LocalDate localDate = LocalDate.now();
LocalTime localTime = LocalTime.now();
LocalDateTime localDateTime = LocalDateTime.now();
System.out.println(localDate);
System.out.println(localTime);
System.out.println(localDateTime);
//of():设置指定的年、月、日、时、分、秒没有偏移量
System.out.println("===================");
LocalDateTime localDateTime1 = LocalDateTime.of(2020, 10, 23, 6, 23, 43);
System.out.println(localDateTime1);
//getXxx()
System.out.println("===================");
System.out.println(localDateTime.getDayOfMonth());//获取当前这一天是这一月的第几天
System.out.println(localDateTime.getDayOfWeek());//获取当前这一天是这一周的星期几
System.out.println(localDateTime.getMonth());//获取当前月的英文值
System.out.println(localDateTime.getMonthValue());//获取当前月的数值
System.out.println(localDateTime.getMinute());//获取当时时间的分钟数
System.out.println("===================");
//体现不可变性：修改日期的值不会对日期本身造成影响
//withXxx():设置相关的属性
LocalDateTime localDateTime2 = localDateTime.withDayOfMonth(22);
System.out.println(localDateTime2);//修改当前日期数之后的日期
System.out.println(localDateTime);//修改之前的日期
System.out.println("===================");
LocalDateTime localDateTime3 = localDateTime.withHour(14);
System.out.println(localDateTime3);//修改当前的小时之后的值
System.out.println(localDateTime);//修改之前的值
System.out.println("===================");
//
LocalDateTime localDateTime4 = localDateTime.plusMonths(3);
System.out.println(localDateTime4);//输出在当前月的基础上加上三个月之后的值
System.out.println(localDateTime);
LocalDateTime localDateTime5 = localDateTime.minusDays(6);
System.out.println(localDateTime5);//输出在当前天数的基础上减去6天之后的值
System.out.println(localDateTime);
}

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