Java 8 Date常用工具类

原创转载请注明出处：https://www.cnblogs.com/agilestyle/p/11983108.html

Demo

 package org.fool.util;

 import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
 import java.time.ZoneId;
 import java.util.Date;

 public class DateUtils {
     /**
      * get the current date
      */
     public static Date getCurrentDate() {
         return new Date();
     }

     /**
      * get the beginning of current date
      */
     public static Date getStartCurrentDate() {
         LocalDateTime start = LocalDateTime.of(LocalDate.now(), LocalTime.MIN);
         return localDateTimeToDate(start);
     }

     /**
      * get the ending of current date
      */
     public static Date getEndCurrentDate() {
         LocalDateTime end = LocalDateTime.of(LocalDate.now(), LocalTime.MAX);
         return localDateTimeToDate(end);
     }

     /**
      * get the previous date
      */
     public static Date getPreviousDate(long days) {
         LocalDate localDate = LocalDate.now().minusDays(days);
         return localDateToDate(localDate);
     }

     /**
      * get the future date
      */
     public static Date getFutureDate(long days) {
         LocalDate localDate = LocalDate.now().plusDays(days);
         return localDateToDate(localDate);
     }

     /**
      * LocalDate => Date
      */
     public static Date localDateToDate(LocalDate localDate) {
         return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
     }

     /**
      * LocalDateTime => Date
      */
     public static Date localDateTimeToDate(LocalDateTime localDateTime) {
         return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
     }

     /**
      * Date => LocalDate
      */
     public static LocalDate dateToLocalDate(Date date) {
         return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDate();
     }

     /**
      * Date => LocalDateTime
      */
     public static LocalDateTime dateToLocalDateTime(Date date) {
         return Instant.ofEpochMilli(date.getTime()).atZone(ZoneId.systemDefault()).toLocalDateTime();
     }
 }

Reference

https://howtodoinjava.com/java/date-time/localdatetime-to-date/