Date、LocalTime、LocalDate、LocalDate-时间操作工具类

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java 8时间日期操作工具类，覆盖了日常工作中大部分的日期操作，因LocalDateTime自身封装的方法比完善，简单的操作只需转换格式调用封装方法即可。

强制依赖jdk8

LocalDateUtils

/* * Copyright 2016-2018. Individual ownership panw * * Tech blog at http://blog.csdn.net/hatsune_miku_. * * Contact Mailbox at mikuismywifu@gmail.com. * * panwang All Rights Reserved. */package com.miku.common.utils.date;import com.miku.common.compatible.ClassIdentical;import java.time.*;import java.time.format.DateTimeFormatter;import java.time.temporal.ChronoUnit;import java.util.Date;/** * File Name:LocalDateUtils * * @author:panwang * @description:  时间获取工具类. 注意:必须使用jdk8以上 * @date:2017/11/22 * @version:V1.0 * @see:jdk8 Copyright (c) 2017, mikuismywifu@gmail.com All Rights Reserved. */public final class LocalDateUtils {    //默认使用系统当前时区    private static final ZoneId ZONE = ZoneId.systemDefault();    private static final String DATE_FORMAT = "yyyy-MM-dd";    private static final String DATE_FORMAT_DEFAULT = "yyyy-MM-dd HH:mm:ss";    private static final String TIME_NOFUII_FORMAT = "yyyyMMddHHmmss";    private static final String REGEX = "\\:|\\-|\\s";    public static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");    /**     * 根据传入的时间格式返回系统当前的时间     *     * @param format string     * @return     */    public static String timeByFormat(String format) {        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(format);        LocalDateTime now = LocalDateTime.now();        return now.format(dateTimeFormatter);    }    /**     * 将Date转换成LocalDateTime     *     * @param d date     * @return     */    public static LocalDateTime dateToLocalDateTime(Date d) {        Instant instant = d.toInstant();        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZONE);        return localDateTime;    }    /**     * 将Date转换成LocalDate     *     * @param d date     * @return     */    public static LocalDate dateToLocalDate(Date d) {        Instant instant = d.toInstant();        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZONE);        return localDateTime.toLocalDate();    }    /**     * 将Date转换成LocalTime     *     * @param d date     * @return     */    public static LocalTime dateToLocalTime(Date d) {        Instant instant = d.toInstant();        LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZONE);        return localDateTime.toLocalTime();    }    /**     * 将LocalDate转换成Date     *     * @param localDate     * @return date     */    public static Date localDateToDate(LocalDate localDate) {        Instant instant = localDate.atStartOfDay().atZone(ZONE).toInstant();        return Date.from(instant);    }    /**     * 将LocalDateTime转换成Date     *     * @param localDateTime     * @return date     */    public static Date localDateTimeToDate(LocalDateTime localDateTime) {        Instant instant = localDateTime.atZone(ZONE).toInstant();        return Date.from(instant);    }    /**     * 将相应格式yyyy-MM-dd yyyy-MM-dd HH:mm:ss 时间字符串转换成Date     *     * @param time string     * @param format string     * @return date     */    public static Date stringToDate(String time , String format) {        DateTimeFormatter f = DateTimeFormatter.ofPattern(format);        if (DATE_FORMAT_DEFAULT.equals(format)) {            return LocalDateUtils.localDateTimeToDate(LocalDateTime.parse(time, f));        } else if (DATE_FORMAT.equals(format)){            return LocalDateUtils.localDateToDate(LocalDate.parse(time, f));        }        return null;    }    /**     * time 类型等于Date返回String time 类型等于String返回对应格式化日期类型     * time 等于String 暂时支持format为yyyy-MM-dd. yyyy-MM-dd HH:mm:ss. yyyyMMddHHmmss     * time 等于Date 不限制格式化类型，返回String     *     * @param time string or date     * @param format string     * @param <T> T     * @return localDateTime or localDate or string     */    public static <T> T timeFormat(T time,String format){        DateTimeFormatter f = DateTimeFormatter.ofPattern(format);        //暂时支持三种格式转换        if (ClassIdentical.isCompatible(String.class,time)){            if (DATE_FORMAT_DEFAULT.equals(format)) {                LocalDateTime localDateTime = LocalDateTime.parse(time.toString(), f);                return (T) localDateTime.atZone(ZONE).toInstant();            }            if (DATE_FORMAT.equals(format)) {                LocalDate localDate = LocalDate.parse(time.toString(), f);                return (T) localDate;            }            if (TIME_NOFUII_FORMAT.equals(format)) {                String rp =  time.toString().replaceAll(REGEX,"");                LocalDateTime localDate = LocalDateTime.parse(time.toString(), f);                return (T) localDate;            }        }        if (ClassIdentical.isCompatible(Date.class,time)){            Date date = (Date) time;            Instant instant = date.toInstant();            instant.atZone(ZONE).format(f);            return (T) instant.atZone(ZONE).format(f);        }        return null;    }    /**     * 根据ChronoUnit枚举计算两个时间差，日期类型对应枚举     * 注:注意时间格式，避免cu选择不当的类型出现的异常     *     * @param cu chronoUnit.enum.key     * @param d1 date     * @param d2 date     * @return     */    public static long chronoUnitBetweenByDate(ChronoUnit cu, Date d1, Date d2) {        return cu.between(LocalDateUtils.dateToLocalDateTime(d1),LocalDateUtils.dateToLocalDateTime(d2));    }    /**     * 根据ChronoUnit枚举计算两个时间差，日期类型对应枚举     * 注:注意时间格式，避免cu选择不当的类型出现的异常     *     * @param cu chronoUnit.enum.key     * @param s1 string     * @param s2 string     * @return     */    public static Long chronoUnitBetweenByString(ChronoUnit cu, String s1, String s2, String dateFormat) {        DateTimeFormatter f = DateTimeFormatter.ofPattern(dateFormat);        if (DATE_FORMAT_DEFAULT.equals(dateFormat)) {            LocalDateTime l1 = LocalDateUtils.dateToLocalDateTime(LocalDateUtils.stringToDate(s1,dateFormat));            LocalDateTime l2 = LocalDateUtils.dateToLocalDateTime(LocalDateUtils.stringToDate(s2,dateFormat));            return cu.between(l1,l2);        }        if (DATE_FORMAT.equals(dateFormat)) {            LocalDate l1 = LocalDateUtils.dateToLocalDate(LocalDateUtils.stringToDate(s1,dateFormat));            LocalDate l2 = LocalDateUtils.dateToLocalDate(LocalDateUtils.stringToDate(s2,dateFormat));            return cu.between(l1,l2);        }        if (TIME_NOFUII_FORMAT.equals(dateFormat)) {            LocalDateTime l1 = LocalDateTime.parse(s1.replaceAll(REGEX,""), f);            LocalDateTime l2 = LocalDateTime.parse(s2.replaceAll(REGEX,""), f);            return cu.between(l1,l2);        }        return null;    }    /**     * 根据ChronoUnit枚举计算两个时间相加，日期类型对应枚举     * 注:注意时间格式，避免cu选择不当的类型出现的异常     *     * @param cu chronoUnit.enum.key     * @param d1 date     * @param d2 long     * @return     */    public static Date chronoUnitPlusByDate(ChronoUnit cu, Date d1, long d2) {        return LocalDateUtils.localDateTimeToDate(cu.addTo(LocalDateUtils.dateToLocalDateTime(d1),d2));    }    /**     * 将time时间转换成毫秒时间戳     *     * @param time string     * @return     */    public static long stringDateToMilli (String time) {        return LocalDateUtils.stringToDate(time,DATE_FORMAT_DEFAULT).toInstant().toEpochMilli();    }    /**     * 将毫秒时间戳转换成Date     *     * @param time string     * @return     */    public static Date timeMilliToDate (String time) {        return Date.from(Instant.ofEpochMilli(Long.parseLong(time)));    }}

ClassIdentical

package com.miku.common.compatible;/** * File Name:ClassIdentical * * @author:panwang * @description: 检测判断类是否符合标准 * @date:2017/11/22 * @version:V1.0 * @see:jdk8 Copyright (c) 2017, mikuismywifu@gmail.com All Rights Reserved. */public class ClassIdentical {    /**     * is compatible.     *     * @param c class.     * @param o instance.     * @return compatible or not.     */    public static boolean isCompatible(Class<?> c, Object o) {        boolean pt = c.isPrimitive();        if( o == null )            return !pt;        if( pt ) {            if( c == int.class )                c = Integer.class;            else if( c == boolean.class )                c = Boolean.class;            else  if( c == long.class )                c = Long.class;            else if( c == float.class )                c = Float.class;            else if( c == double.class )                c = Double.class;            else if( c == char.class )                c = Character.class;            else if( c == byte.class )                c = Byte.class;            else if( c == short.class )                c = Short.class;        }        if( c == o.getClass() )            return true;        return c.isInstance(o);    }}

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