让我们先设置一个日期:
LocalDate localDate = LocalDate.of(2019, Month.JUNE, 15)
现在,将LocalDate调整为每月的最后一天;
LocalDate day = localDate.with(TemporalAdjusters.lastDayOfMonth());
import java.time.LocalDate; import java.time.Month; import java.time.temporal.TemporalAdjusters; public class Demo { public static void main(String[] args) { LocalDate localDate = LocalDate.of(2019, Month.JUNE, 15); System.out.println("Current Date = "+localDate); System.out.println("Current Month = "+localDate.getMonth()); LocalDate day = localDate.with(TemporalAdjusters.firstDayOfMonth()); System.out.println("First day of month = "+day); day = localDate.with(TemporalAdjusters.lastDayOfMonth()); System.out.println("Last day of month = "+day); day = localDate.with(TemporalAdjusters.firstDayOfNextMonth()); System.out.println("First day of next month = "+day); } }
输出结果
Current Date = 2019-06-15 Current Month = JUNE First day of month = 2019-06-01 Last day of month = 2019-06-30 First day of next month = 2019-07-01