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点击查看代码- @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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