本文實例主要是關於Java8中的新特性，時間日期api的相關實例，具體如下：
package com.effective.common.base.date;import java.time.Instant;import java.time.LocalDate;import java.time.LocalDateTime;import java.time.LocalTime;import java.time.Period;import java.time.ZoneId;import java.time.format.DateTimeFormatter;import java.time.temporal.ChronoUnit;import java.util.Date;/** * 日期工具類* @author yanweiqi * @since 2016-5-6 * */public class LocalDateUtils {private static ZoneId zone = ZoneId.systemDefault();/** * 字符串轉Date * @param date * @return * @throws Exception */public static Date convertToDate(String date) throws Exception{LocalDate localDate = null;if(null == date){throw new NullPointerException("date isn't null");} else {localDate = LocalDate.parse(date);return convertToDate(localDate);}}/** * 字符串轉LocalDateTime * @param date * @return localDateTime */public static LocalDateTime convertToLocalDateTime(String date){LocalDateTime localDateTime = null;if(null == date){throw new NullPointerException("date isn't null");} else {localDateTime = LocalDateTime.parse(date);return localDateTime;}}/** * LocalDate轉Date * @param localDate * @return Date */public static Date convertToDate(LocalDate localDate){Instant instant = localDate.atStartOfDay().atZone(zone).toInstant();return Date.from(instant);}/** * LocalDate轉Date * @param localDateTime * @return Date */public static Date convertToDate(LocalDateTime localDateTime){Instant instant = localDateTime.atZone(zone).toInstant();return Date.from(instant);}/** * Date轉LocalDate * @param date * @return localDate */public static LocalDate convertToLocalDate(Date date){Instant instant = date.toInstant();return convertToLocalDateTime(instant).toLocalDate();}/** * Date轉LocalTime * @param date * @return localDate */public static LocalTime convertToLocalTime(Date date){Instant instant = date.toInstant();return convertToLocalDateTime(instant).toLocalTime();}/** * Date轉LocalDatetime * @param date * @return localDate */public static LocalDateTime convertToLocalDateTime(Date date){Instant instant = date.toInstant();return convertToLocalDateTime(instant);}/** * Instant轉LocalDateTime * @param instant * @return */public static LocalDateTime convertToLocalDateTime(Instant instant){return LocalDateTime.ofInstant(instant, zone);}/** * LocalDateTime轉Instant * @param localDateTime * @return */public static Instant convertToInstant(LocalDateTime localDateTime){return localDateTime.atZone(zone).toInstant();}/** * LocalDate轉Instant * @param localDate * @return */public static Instant convertToInstant(LocalDate localDate){return localDate.atStartOfDay(zone).toInstant();}/** * LocalDate轉LocalDateTime * @param localDate * @return LocalDateTime */public static LocalDateTime convertToLocalDateTime(LocalDate localDate){return localDate.atStartOfDay();}/** * 日週期格式化* @param localDateTime * @param formatStyle * @return */public static String formatter(LocalDateTime localDateTime, String formatStyle){return DateTimeFormatter.ofPattern(formatStyle).format(localDateTime);}/** * 設置年* @param sourceDate * @param year * @return LocalDateTime */public static LocalDateTime setYear(LocalDateTime sourceDate, Integer year){return sourceDate.withYear(year);}/** * 設置月* @param sourceDate * @param month * @return LocalDateTime */public static LocalDateTime setMonth(LocalDateTime sourceDate, Integer month){return sourceDate.withMonth(month);}/** * 設置天* @param sourceDate * @param month * @return LocalDateTime */public static LocalDateTime setDayOfMonth(LocalDateTime sourceDate, Integer dayOfMonth){return sourceDate.withDayOfMonth(dayOfMonth);}/** * 設置小時* @param sourceDate * @param hour * @return */public static LocalDateTime setHour(LocalDateTime sourceDate,Integer hour){return sourceDate.withHour(hour);}/** * 設置分鐘* @param sourceDate * @param minute * @return */public static LocalDateTime setMinute(LocalDateTime sourceDate,Integer minute){return sourceDate.withMinute(minute);}/** * 設置秒* @param sourceDate * @param second * @return */public static LocalDateTime setSecond(LocalDateTime sourceDate,Integer second){return sourceDate.withSecond(second);}/** * 修改年月日* @param sourceDate * @param year * @param month * @param dayOfMonth * @return */public static LocalDateTime setYMD(LocalDateTime sourceDate, Integer year, Integer month, Integer dayOfMonth) {return sourceDate.withYear(year).withMonth(month).withDayOfMonth(dayOfMonth);}/** * 修改時分秒* @param sourceDate * @param hour * @param minute * @param second * @return */public static LocalDateTime setHMS(LocalDateTime sourceDate,Integer hour, Integer minute, Integer second) {return sourceDate.withHour(hour).withMinute(minute).withSecond(second);}/** * 計算相差的天數* @param beginDate * @param endDate * @return */public static int getInteverDays(LocalDate beginDate,LocalDate endDate){Period period = Period.between(beginDate, endDate);return period.getDays();}/** * 日期加減* @param num 數量* @param unit 單位* @param LocalDate 原日期* @return LocalDate 增加後的日期*/@SuppressWarnings("static-access") public static LocalDate addLocalDate(long num,ChronoUnit unit,final LocalDate localDate){LocalDate resultDate;if(num > 0){resultDate = localDate.now().plus(num, unit);} else {resultDate = localDate.now().minus(Math.abs(num), unit);}return resultDate;}/** * 日期時分秒加* @param num 數量* @param unit 單位* @param localDateTime 原日期* @return LocalDateTime 增加後的日期*/@SuppressWarnings("static-access") public static LocalDateTime addLocalDateTime(long num,ChronoUnit unit,LocalDateTime localDateTime){LocalDateTime resultDateTime;if(num > 0){resultDateTime = localDateTime.now().plus(num, unit);} else {resultDateTime = localDateTime.now().minus(Math.abs(num),unit);}return resultDateTime;}/** * 時分秒加減* @param num 數量* @param unit 單位* @param localTime 原日期* @return LocalDateTime 增加後的日期*/@SuppressWarnings("static-access") public static LocalTime addLocalTime(long num,ChronoUnit unit,LocalTime localTime){LocalTime resultTime;if(num > 0){resultTime = localTime.now().plus(num, unit);} else {resultTime = localTime.now().minus(Math.abs(num), unit);}return resultTime;}public static void main(String[] args){LocalDateTime time = LocalDateTime.now();String rr = formatter(time, "yyyy-MM-dd HH:mm:ss");System.out.println(rr);LocalDateTime time2 = addLocalDateTime(-2, ChronoUnit.HOURS, time);String yy = formatter(time2, "yyyy-MM-dd HH:mm:ss");System.out.println(yy);}代碼涉及時間日期類的使用等內容，具有簡單註釋，大家可自行參考。
總結
以上就是本文關於Java編程時間日期API實例解析的全部內容，希望對大家有所幫助。感興趣的朋友可以繼續參閱本站其他相關專題，如有不足之處，歡迎留言指出。感謝朋友們對本站的支持！