java8中LocalDate和Date之间的转换

我就是我 2022-03-08 20:41 362阅读 0赞

因为切换到了java8 ,但是一些东西还是使用的 import java.util.Date 对象表示的,所以需要对他们进行转换,

封装了一个工具类,具体,如下:

/**
     * 张科
     * 2019年1月14日20:55:54
     */
    public class DateAndLocalDateUtil {
    
        /**
         * localDate转Date
         */
        public static Date localDate2Date(LocalDate localDate) {
            ZonedDateTime zonedDateTime = localDate.atStartOfDay(ZoneId.systemDefault());
            Instant instant1 = zonedDateTime.toInstant();
            Date from = Date.from(instant1);
            return from;
        }
    
        /**
         * Date 转 localDate
         */
        public static LocalDate date2LocalDate(Date date) {
            Instant instant = date.toInstant();
            ZonedDateTime zdt = instant.atZone(ZoneId.systemDefault());
            LocalDate localDate = zdt.toLocalDate();
            return localDate;
        }
    
        //获取月第一天
        public static Date getStartDayOfMonth(String date) {
            LocalDate now = LocalDate.parse(date);
            return getStartDayOfMonth(now);
        }
    
        public static Date getStartDayOfMonth(LocalDate date) {
            LocalDate now = date.with(TemporalAdjusters.firstDayOfMonth());
            return localDate2Date(now);
        }
    
        public static Date getStartDayOfMonth() {
            return getStartDayOfMonth(LocalDate.now());
        }
    
    
        //获取月最后一天
        public static Date getEndDayOfMonth(String date) {
            LocalDate localDate = LocalDate.parse(date);
            return getEndDayOfMonth(localDate);
        }
    
        public static Date getEndDayOfMonth(Date date) {
            return getEndDayOfMonth(date2LocalDate(date));
        }
    
        public static Date getEndDayOfMonth(LocalDate date) {
            LocalDate now = date.with(TemporalAdjusters.lastDayOfMonth());
            Date.from(now.atStartOfDay(ZoneId.systemDefault()).plusDays(1L).minusNanos(1L).toInstant());
            return localDate2Date(now);
        }
    
        public static Date getEndDayOfMonth() {
            return getEndDayOfMonth(LocalDate.now());
        }
    
    
        //获取周第一天
        public static Date getStartDayOfWeek(String date) {
            LocalDate now = LocalDate.parse(date);
            return getStartDayOfWeek(now);
        }
    
        public static Date getStartDayOfWeek(TemporalAccessor date) {
            TemporalField fieldISO = WeekFields.of(Locale.CHINA).dayOfWeek();
            LocalDate localDate = LocalDate.from(date);
            localDate = localDate.with(fieldISO, 1);
            return localDate2Date(localDate);
        }
    
        //获取周最后一天
        public static Date getEndDayOfWeek(String date) {
            LocalDate localDate = LocalDate.parse(date);
            return getEndDayOfWeek(localDate);
        }
    
        public static Date getEndDayOfWeek(TemporalAccessor date) {
            TemporalField fieldISO = WeekFields.of(Locale.CHINA).dayOfWeek();
            LocalDate localDate = LocalDate.from(date);
            localDate = localDate.with(fieldISO, 7);
            return Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).plusDays(1L).minusNanos(1L).toInstant());
        }
    
        //一天的开始
        public static LocalDateTime getStartOfDay(LocalDate date) {
            LocalDateTime time = LocalDateTime.of(date, LocalTime.MIN);
            return time;
        }
    
        public static LocalDateTime getStartOfDay() {
            return getStartOfDay(LocalDate.now());
        }
    
        /**
         * 一天的结束
         */
        public static LocalDateTime getEndOfDay(LocalDate date) {
            LocalDateTime time = LocalDateTime.of(date, LocalTime.MAX);
            return time;
        }
    
        public static LocalDateTime getEndOfDay() {
            return getEndOfDay(LocalDate.now());
        }
    
    
    
    }