【java工具类-时间与日期】获取俩个日期的相差天数日期格式化日期类型转换Date转化为JDK的LocalDate 格式的日期工具类处理日期类型与字符串互转计算俩个日期时分秒

本文主要是介绍【java工具类-时间与日期】获取俩个日期的相差天数日期格式化日期类型转换Date转化为JDK的LocalDate 格式的日期工具类处理日期类型与字符串互转计算俩个日期时分秒，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

目录

1、距离今天的日期天数

2、在日志监控耗时经常使用的计时器，到毫秒级我们使用计时器

 3、日期的格式化

获取系统时间，格式 yyyy-MM-dd HH:mm:ss

获取字符串系统时间，格式 yyyyMMddHH:mm:ss

时间格式化，字符串与2021年1月15日23:37:50时间格式互相转换

格式化时间，Date转化为String字符串

返回时间段内俩个时间节点相差的所有小时

获取两个日期之间周数列表，俩个日期相差的直接所有周总数

获取两个日期之间相差多少个月 月数列表

获取某一天的开始时间

获取某一天的结束时间

获取俩个时间点的差值转换为分钟或者秒

 获取俩个时间点的差值转换为分钟或者秒

 

全部的工具类，可以直接作为参考，

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前言：

工作或者使用中java处理日期是经常遇到的问题，所以我们要对Date类型的处理进行架构，能够使之复用。

比如说实现下面的工具类；

又比如说使用功能jdk8版本的获取俩个日期的时间；YYYY-MM-DD这种格式日期的相隔时间；

1、距离今天的日期天数

   public static final String format1 = "yyyy-MM-dd";
    public static final String format2 = "yyyy-MM-dd HH:mm:ss";
    public static final String format3 = "yyyyMMddHHmmss";
    public static final String format4 = "yyyyMMdd";
    public static final String format5 = "yyyy/MM/dd HH";
    public static final String format6 = "yyyy/MM/dd";
    public static final String format7 = "yyyy-MM";
    public static final String format8 = "yyyyMM";
    public static final String format9 = "yyyy/ww";
    public static final String format10 = "yyyy/MM";
 

  可以直接计算出来，距离今天有多久了，一共有多少天

 

/***jdk8版本中进行俩个时间节点的相差天数*   与今天日期对比* @return*/
public static Integer getPeriodDays(String  oneDateStr) {LocalDate   startLocalDate = LocalDate.parse(oneDateStr, DateUtil.FORMATTERS_1);LocalDate   todayLocalDate = LocalDate.now();Long  diffDays=Duration.between(startLocalDate.atStartOfDay(),todayLocalDate.atStartOfDay()).toDays();return diffDays.intValue() ;
}

2、在日志监控耗时经常使用的计时器，到毫秒级我们使用计时器

Instant startPostTime = Instant.now();
String ID = httpPostManager.sendGet(SysConfig.CHECK_ID);
Instant endPostTime = Instant.now();
long peridMillis = Duration.between(startPostTime, endPostTime).toMillis();
log.error("当前返回id={}， 请求访问返回结果耗时{}毫秒", Id, peridMillis);

 3、日期的格式化

 /**

获取系统时间，格式 yyyy-MM-dd HH:mm:ss

     *
     * @return  字符串
     */
    public static String getSysDateToString() {
        SimpleDateFormat df = new SimpleDateFormat(FORMAT_DATETIME);
        return df.format(new Date());
    }

    /**

获取字符串系统时间，格式 yyyyMMddHH:mm:ss

     *
     * @return
     */
    public static String getSysDate() {
        SimpleDateFormat df = new SimpleDateFormat(YYYYMMDDHHMMSSS);
        return df.format(new Date());
    }

    /**

时间格式化，字符串与2021年1月15日23:37:50时间格式互相转换

     *
     * @return
     */
    public static String getDateFormat(Date date, String format) {
        SimpleDateFormat df = new SimpleDateFormat(format);
        return df.format(date);
    }

格式化时间，Date转化为String字符串

     */
    public static String format(Date date, String format) {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
        return simpleDateFormat.format(date);
    }

 

全部的工具类，可以直接作为参考，

 

import com.google.common.collect.Lists;
import org.apache.commons.lang3.StringUtils;import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.TemporalQuery;
import java.util.Calendar;
import java.util.Date;
import java.util.List;/*** @author 脚踏实地的做好本职工作，积累* @date 2020/12/3*/
public class DateUtil {/*** 时间格式："yyyy-MM-dd HH:mm:ss"*/public final static String FORMAT_DATETIME = "yyyy-MM-dd HH:mm:ss";/*** 时间格式："yyyy-MM-dd HH:mm:ss"*/public final static String YYYYMMDDHHMMSSS = "yyyyMMddHHmmsss";public final static String[] HOURS_DAY = {"00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11","12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23"};public static final String format1 = "yyyy-MM-dd";public static final String format2 = "yyyy-MM-dd HH:mm:ss";public static final String format3 = "yyyyMMddHHmmss";public static final String format4 = "yyyyMMdd";public static final String format5 = "yyyy/MM/dd HH";public static final String format6 = "yyyy/MM/dd";public static final String format7 = "yyyy-MM";public static final String format8 = "yyyyMM";public static final String format9 = "yyyy/ww";public static final String format10 = "yyyy/MM";public static final DateTimeFormatter FORMATTERS_1 = DateTimeFormatter.ofPattern(format1);public static final DateTimeFormatter FORMATTERS_2 = DateTimeFormatter.ofPattern(format2);public static final DateTimeFormatter FORMATTERS_4 = DateTimeFormatter.ofPattern(format4);public static final DateTimeFormatter FORMATTERS_7 = DateTimeFormatter.ofPattern(format7);public static final DateTimeFormatter FORMATTERS_8 = DateTimeFormatter.ofPattern(format8);public static final SimpleDateFormat FORMATTERS_9 = new SimpleDateFormat(format9);public static final SimpleDateFormat FORMATTERS_10 = new SimpleDateFormat(format10);/*** 获取系统时间，格式 yyyy-MM-dd HH:mm:ss** @return*/public static String getSysDateToString() {SimpleDateFormat df = new SimpleDateFormat(FORMAT_DATETIME);return df.format(new Date());}/*** 获取系统时间，格式 yyyy-MM-dd HH:mm:ss** @return*/public static String getSysDate() {SimpleDateFormat df = new SimpleDateFormat(YYYYMMDDHHMMSSS);return df.format(new Date());}/*** 时间格式化** @return*/public static String getDateFormat(Date date, String format) {SimpleDateFormat df = new SimpleDateFormat(format);return df.format(date);}/*** 格式化时间*/public static String format(Date date, String format) {SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);return simpleDateFormat.format(date);}/*** 今天日期*/public static String getToday() {return format(new Date(), format1);}/*** 时间字符串转Date** @param dateStr* @param format* @return*/public static Date parse(String dateStr, String format) {SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);try {return simpleDateFormat.parse(dateStr);} catch (ParseException e) {e.printStackTrace();}return null;}/*** 前一天日期*/public static String previousDay() {return previousNDay(1);}/*** 几一天日期*/public static String previousNDay(int n) {SimpleDateFormat sdf = new SimpleDateFormat(format1);Calendar c = Calendar.getInstance();c.add(Calendar.DATE, -n);Date preDay = c.getTime();String preDayStr = sdf.format(preDay);return preDayStr;}/*** 获取当天24点时间** @return*/public static Long getTimesNight() {Calendar cal = Calendar.getInstance();cal.set(Calendar.HOUR_OF_DAY, 24);cal.set(Calendar.SECOND, 0);cal.set(Calendar.MINUTE, 0);cal.set(Calendar.MILLISECOND, 0);return cal.getTime().getTime();}/*** 获得当天零时零分零秒** @return*/public static Date todayHourDate(int hour) {Calendar calendar = Calendar.getInstance();calendar.setTime(new Date());calendar.set(Calendar.HOUR_OF_DAY, hour);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);return calendar.getTime();}/*** 获得昨天的时间点** @return*/public static Date yesterdayHourDate(int hour) {Calendar calendar = Calendar.getInstance();calendar.setTime(new Date());calendar.add(Calendar.DATE, -1);calendar.set(Calendar.HOUR_OF_DAY, hour);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);return calendar.getTime();}/*** 获取五周前的星期一零点零分零秒** @return*/public static Date getSixWeekAgoTime() {Calendar calendar = Calendar.getInstance();// 设置为本周的星期日calendar.set(Calendar.DAY_OF_WEEK, 1);calendar.add(Calendar.WEEK_OF_MONTH, -5);calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);return calendar.getTime();}/*** 获取五个月前的1号零点零分零秒** @return*/public static Date getSixMonthAgoTime() {Calendar calendar = Calendar.getInstance();calendar.add(Calendar.MONTH, -5);calendar.set(Calendar.DAY_OF_MONTH, 1);calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);return calendar.getTime();}/*** 返回时间段内所有日期天数** @param startTime* @param endTime* @return*/public static List<String> getDays(Date startTime, Date endTime) {// 返回的日期集合List<String> days = Lists.newArrayList();DateFormat dateFormat = new SimpleDateFormat(format6);Calendar tempStart = Calendar.getInstance();tempStart.setTime(startTime);Calendar tempEnd = Calendar.getInstance();tempEnd.setTime(endTime);while (tempStart.before(tempEnd)) {days.add(dateFormat.format(tempStart.getTime()));tempStart.add(Calendar.DAY_OF_YEAR, 1);}return days;}/*** 返回时间段内所有小时** @param startTime* @param endTime* @return*/public static List<String> getHours(Date startTime, Date endTime) {// 返回的日期集合List<String> hours = Lists.newArrayList();DateFormat dateFormat = new SimpleDateFormat(format6);Calendar tempStart = Calendar.getInstance();tempStart.setTime(startTime);Calendar tempEnd = Calendar.getInstance();tempEnd.setTime(endTime);while (tempStart.before(tempEnd)) {String day = dateFormat.format(tempStart.getTime());for (String hour : HOURS_DAY) {hours.add(day + " " + hour);}tempStart.add(Calendar.DAY_OF_YEAR, 1);}return hours;}/*** 获取两个日期之间周数列表** @param startTime* @param endTime* @return*/public static List<String> getWeeks(Date startTime, Date endTime) {List<String> weeks = Lists.newArrayList();Calendar start = Calendar.getInstance();start.setFirstDayOfWeek(Calendar.MONDAY);start.setTime(startTime);Calendar end = Calendar.getInstance();end.setFirstDayOfWeek(Calendar.MONDAY);end.setTime(endTime);while (start.before(end)) {weeks.add(FORMATTERS_9.format(start.getTime()));start.add(Calendar.WEEK_OF_YEAR, 1);}return weeks;}/*** 获取两个日期之间月数列表** @param startTime* @param endTime* @return*/public static List<String> getMonths(Date startTime, Date endTime) {List<String> weeks = Lists.newArrayList();Calendar start = Calendar.getInstance();start.setTime(startTime);Calendar end = Calendar.getInstance();end.setTime(endTime);while (start.before(end)) {weeks.add(FORMATTERS_10.format(start.getTime()));start.add(Calendar.MONTH, 1);}return weeks;}/*** 获取某一天的开始时间** @param currentDate* @return*/public static String getStartTime(Date currentDate) {SimpleDateFormat df = new SimpleDateFormat(FORMAT_DATETIME);Calendar calendar = Calendar.getInstance();calendar.setTime(currentDate);calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);return df.format(calendar.getTime());}/*** 获取某一天的结束时间** @param currentDate* @return*/public static String getEndTime(Date currentDate) {SimpleDateFormat df = new SimpleDateFormat(FORMAT_DATETIME);Calendar calendar = Calendar.getInstance();calendar.setTime(currentDate);calendar.add(Calendar.DAY_OF_MONTH, 1);calendar.add(Calendar.SECOND, -1);return df.format(calendar.getTime());}public static Date getEndDate(Date currentDate) {Calendar calendar = Calendar.getInstance();calendar.setTime(currentDate);calendar.add(Calendar.DAY_OF_MONTH, 1);calendar.add(Calendar.SECOND, -1);return calendar.getTime();}/**** 获取俩个时间点的差值转换为分钟或者秒* @param startDate* @param currentDate* @return*/public static String getPeriodDiffTime(Date startDate, Date currentDate) {if (startDate != null && currentDate != null) {long minuteMillionNum = 1000 * 60;// 获得两个时间的毫秒时间差异long diff = currentDate.getTime() - startDate.getTime();// 计算差多少秒long millionminute = diff / 1000;// 计算差多少分钟long minute = diff / minuteMillionNum;if (minute > 0) {millionminute = (diff - minute * minuteMillionNum) / 1000;return minute + "分钟" + millionminute + "秒";} else {return Math.abs(millionminute) + "秒";}}return "未知";}/**** 获取俩个时间点的差值转换为分钟或者秒* @param startDate* @param currentDate* @return*/public static Long getPeriodDiffTimeNum(Date startDate, Date currentDate) {if (startDate != null && currentDate != null) {// 获得两个时间的毫秒时间差异long diff = currentDate.getTime() - startDate.getTime();// 计算差多少秒long millionminute = diff / 1000;return Math.abs(millionminute);}return 0L;}public enum Quarter {/*** 第一季度*/FIRST(1, "1Q"),/*** 第二季度*/SECOND(4, "2Q"),/*** 第三季度*/THIRD(7, "3Q"),/*** 第四季度*/FOURTH(10, "4Q");/*** 季度的第一天*/private Integer minMonth;/*** 季度名称*/private String name;Quarter(Integer minMonth, String name) {this.minMonth = minMonth;this.name = name;}public Integer getMinMonth() {return minMonth;}public void setMinMonth(Integer minMonth) {this.minMonth = minMonth;}public String getName() {return name;}public void setName(String name) {this.name = name;}}public static class QuarterOfYearQuery implements TemporalQuery<Quarter> {@Overridepublic Quarter queryFrom(TemporalAccessor temporal) {LocalDate now = LocalDate.from(temporal);if (now.isBefore(now.with(Month.APRIL).withDayOfMonth(1))) {return Quarter.FIRST;} else if (now.isBefore(now.with(Month.JULY).withDayOfMonth(1))) {return Quarter.SECOND;} else if (now.isBefore(now.with(Month.OCTOBER).withDayOfMonth(1))) {return Quarter.THIRD;} else {return Quarter.FOURTH;}}}public static LocalDateTime parse(Date date) {if (date == null) {return null;}return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());}public static LocalDateTime parse(String datestr) {if (StringUtils.isNotBlank(datestr)) {return LocalDateTime.parse(datestr, DateTimeFormatter.ofPattern(format2));}return null;}public static Date toDate(LocalDateTime localDateTime) {if (localDateTime == null) {return null;}return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());}public static Long toLong(LocalDateTime localDateTime) {if (null == localDateTime) {return null;}return localDateTime.toInstant(ZoneOffset.of("+8")).toEpochMilli();}/*** 获取两个时间间隔的天数** @param startDate 开始时间* @param endDate   结束时间* @return 间隔的天数*/public static double getIntervalDays(Date startDate, Date endDate) {double interPerid = endDate.getTime() - startDate.getTime();double oneDay = 60 * 60 * 24 * 1000;if (interPerid < 0) {double resultAbs=Math.abs(interPerid / oneDay);double result = Math.round(resultAbs);if(resultAbs>result){return -(result+1);}return -result;}return Math.round(interPerid / oneDay);}/*** 增加日期的秒钟。失败返回null。** @param date         日期字符串* @param secondAmount 增加数量。可为负数* @return 增加秒钟后的日期字符串*/public static String addSecond(String date, int secondAmount) {return addInteger(date, Calendar.SECOND, secondAmount);}/*** 增加日期中某类型的某数值。如增加日期** @param date     日期字符串* @param dateType 类型* @param amount   数值* @return 计算后日期字符串*/private static String addInteger(String date, int dateType, int amount) {Date myDate = toDate(parse(date));myDate = addInteger(myDate, dateType, amount);String dateString = format(myDate, FORMAT_DATETIME);return dateString;}/*** 增加日期中某类型的某数值。如增加日期** @param date     日期* @param dateType 类型* @param amount   数值* @return 计算后日期*/private static Date addInteger(Date date, int dateType, int amount) {Date myDate = null;if (date != null) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.add(dateType, amount);myDate = calendar.getTime();}return myDate;}public static Long getIntervalDays(String startDateStr, String endDateStr) {Date startDate = parse(startDateStr, FORMAT_DATETIME);Date endDate = parse(endDateStr, FORMAT_DATETIME);if (null == startDate || null == endDate) {return 0L;}Double result = getIntervalDays(startDate, endDate);return Long.valueOf(result.longValue());}/*** 获取date之前past日的日期* @param date* @param past* @return*/public static Date getPastDate(Date date, int past) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) - past);return calendar.getTime();}/*** 获取date之后的第past天的日期* @param date* @param future* @return*/public static Date getFutureDate(Date date, int future) {Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + future);return calendar.getTime();}/***将 localtime 转成date* @param localdatetime* @return*/public static Date LocalDateTimeToDate(LocalDateTime  localdatetime) {ZoneId zoneId = ZoneId.systemDefault();ZonedDateTime zdt =  localdatetime.atZone(zoneId);return Date.from(zdt.toInstant());}/*** 获取系统时间，格式 yyyy-MM-dd** @return*/public static String getNowDateToYYYYMMDD() {SimpleDateFormat df = new SimpleDateFormat(format1);return df.format(new Date());}/***jdk8版本中进行俩个时间节点的相差天数*   与今天日期对比* @return*/public static Integer getPeriodDays(String  oneDateStr) {LocalDate   startLocalDate = LocalDate.parse(oneDateStr, DateUtil.FORMATTERS_1);LocalDate   todayLocalDate = LocalDate.now();Long  diffDays=Duration.between(startLocalDate.atStartOfDay(),todayLocalDate.atStartOfDay()).toDays();return diffDays.intValue() ;}public static void main(String[] args) {
//        String startDateStr = "2020-07-30 00:00:00";String startDateStr = "2020-08-14 00:00:00";String endDateSTr = "2020-08-06 16:44:00";System.out.println(getIntervalDays(startDateStr, endDateSTr));System.out.println("距离今天"+getPeriodDays("2020-09-02"));//8}
}运算结果展示：
-8
距离今天0

 

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