java时间工具类，时间相互转换

/*
 * @author XueWeiWei
 * @date 2019/8/26 16:22
 */
package com.nps.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.ZoneId;
import java.util.Date;

public class DateUtils {
    private static final org.slf4j.Logger logger = null;
    private static final java.time.format.DateTimeFormatter yyyyMMddFmt = null;

    public DateUtils() {
    }

    public static boolean sameDate(java.util.Date d1, java.util.Date d2){
        return d1.equals(d2);
    }

    public static java.time.LocalDate getDateByStr(java.lang.String dateStr, java.lang.String fmt) {
        try {
            return dateToLocalDate(new SimpleDateFormat().parse(dateStr+fmt));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static java.time.LocalDate dateToLocalDate(java.util.Date date) {
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
    }

    public static java.time.LocalDateTime dateToLocalDateTime(java.util.Date date){
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();
    }

    public static java.util.Date localDateToDate(java.time.LocalDate localDate){
        return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
    }

    public static java.util.Date localDateTimeToDate(java.time.LocalDateTime localDateTime){
        return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
    }

    public static java.lang.String dateToString(java.util.Date date){ return date.toString();}

    public static void main(String[] args) {

    }

}

　　

/*
 * @author XueWeiWei
 * @date 2019/8/26 16:22
 */
package com.nps.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.ZoneId;
import java.util.Date;

public class DateUtils {
    private static final org.slf4j.Logger logger = null;
    private static final java.time.format.DateTimeFormatter yyyyMMddFmt = null;

    public DateUtils() {
    }

    public static boolean sameDate(java.util.Date d1, java.util.Date d2){
        return d1.equals(d2);
    }

    public static java.time.LocalDate getDateByStr(java.lang.String dateStr, java.lang.String fmt) {
        try {
            return dateToLocalDate(new SimpleDateFormat().parse(dateStr+fmt));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static java.time.LocalDate dateToLocalDate(java.util.Date date) {
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
    }

    public static java.time.LocalDateTime dateToLocalDateTime(java.util.Date date){
        return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();
    }

    public static java.util.Date localDateToDate(java.time.LocalDate localDate){
        return Date.from(localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant());
    }

    public static java.util.Date localDateTimeToDate(java.time.LocalDateTime localDateTime){
        return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
    }

    public static java.lang.String dateToString(java.util.Date date){ return date.toString();}

    public static void main(String[] args) {

    }

}