自己学习中的知识点（2）---jdk8 时间新特性

自己学到的知识点，相当于笔记，若有问题，欢迎指出

获取当前时间及当前的年，月，日 LocalDate today= LocalDate.now(); int year = today.getYear(); int month = today.getMonthValue(); int day = today.getDayOfMonth();

获取某个特定时间 LocalDate ofEpochDay = LocalDate.of(2017, 01, 02);

获取某一时间所在周周一（也可获取一周内的任一天，1是代表周一，依次类推） LocalDate days = 时间； TemporalField fieldISO1 = WeekFields.of(Locale.FRANCE).dayOfWeek(); LocalDate monday = days.with(fieldISO1, 1);

将java.util.Date类型转换为LocalDate类型 Date times = new Date(); Instant instant = times.toInstant(); ZoneId zone = ZoneId.systemDefault(); LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, zone); LocalDate localDate = localDateTime.toLocalDate();

将LocalDate类型转换为java.util.Date类型 LocalDate localDate= LocalDate.now(); ZoneId zone = ZoneId.systemDefault(); Instant instant = localDate.atStartOfDay().atZone(zone).toInstant(); Date date = Date.from(instant);

两个日期之间相隔多久 LocalDate localDate= LocalDate.now(); LocalDate ofEpochDay = LocalDate.of(2017, 01, 02); // 相隔天 int days = (int)ChronoUnit.DAYS.between(ofEpochDay, localDate); // 相隔月 int months = (int)ChronoUnit.MONTHS.between(ofEpochDay, localDate); //相隔年 int months = (int)ChronoUnit.YEARS.between(ofEpochDay, localDate);

获取多久后的日期 LocalDate today= LocalDate.now(); // 一周后的 LocalDate nextWeek = today.plus(1, ChronoUnit.WEEKS); //一年后的 LocalDate nextYear = today.plus(1, YEARS); //一年前的 LocalDate previousYear = today.minus(1, ChronoUnit.YEARS);