DateUtils 工具类

package com.huitian.eco.repair.utils;import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;/*** @author CDN* @desc  公共日期工具类* @date 2020/08/27 11:14*/
public class DateUtils {public static String DATE_FORMAT = "yyyy-MM-dd";public static String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";public static String DATE_FORMAT_CHINESE = "yyyy年M月d日";/*** 获取当前日期** @return*/public static String getCurrentDate() {String datestr = null;SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);datestr = df.format(new Date());return datestr;}/*** 获取当前日期时间** @return*/public static String getCurrentDateTime() {String datestr = null;SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_TIME_FORMAT);datestr = df.format(new Date());return datestr;}/*** 获取当前日期时间** @return*/public static String getCurrentDateTime(String Dateformat) {String datestr = null;SimpleDateFormat df = new SimpleDateFormat(Dateformat);datestr = df.format(new Date());return datestr;}public static String dateToDateTime(Date date) {String datestr = null;SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_TIME_FORMAT);datestr = df.format(date);return datestr;}/*** 将字符串日期转换为日期格式** @param datestr* @return*/public static Date stringToDate(String datestr) {if (datestr == null || "".equals(datestr)) {return null;}Date date = new Date();SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);try {date = df.parse(datestr);} catch (ParseException e) {date = DateUtils.stringToDate(datestr, "yyyyMMdd");}return date;}/*** 将字符串日期转换为日期格式* 自定義格式** @param datestr* @return*/public static Date stringToDate(String datestr, String dateformat) {Date date = new Date();SimpleDateFormat df = new SimpleDateFormat(dateformat);try {date = df.parse(datestr);} catch (ParseException e) {e.printStackTrace();}return date;}/*** 将日期格式日期转换为字符串格式** @param date* @return*/public static String dateToString(Date date) {String datestr = null;SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);datestr = df.format(date);return datestr;}/*** 将日期格式日期转换为字符串格式 自定義格式** @param date* @param dateformat* @return*/public static String dateToString(Date date, String dateformat) {String datestr = null;SimpleDateFormat df = new SimpleDateFormat(dateformat);datestr = df.format(date);return datestr;}/*** 获取日期的DAY值** @param date 输入日期* @return*/public static int getDayOfDate(Date date) {int d = 0;Calendar cd = Calendar.getInstance();cd.setTime(date);d = cd.get(Calendar.DAY_OF_MONTH);return d;}/*** 获取日期的MONTH值** @param date 输入日期* @return*/public static int getMonthOfDate(Date date) {int m = 0;Calendar cd = Calendar.getInstance();cd.setTime(date);m = cd.get(Calendar.MONTH) + 1;return m;}/*** 获取日期的YEAR值** @param date 输入日期* @return*/public static int getYearOfDate(Date date) {int y = 0;Calendar cd = Calendar.getInstance();cd.setTime(date);y = cd.get(Calendar.YEAR);return y;}/*** 获取星期几** @param date 输入日期* @return*/public static int getWeekOfDate(Date date) {int wd = 0;Calendar cd = Calendar.getInstance();cd.setTime(date);wd = cd.get(Calendar.DAY_OF_WEEK) - 1;return wd;}/*** 获取输入日期的当月第一天** @param date 输入日期* @return*/public static Date getFirstDayOfMonth(Date date) {Calendar cd = Calendar.getInstance();cd.setTime(date);cd.set(Calendar.DAY_OF_MONTH, 1);return cd.getTime();}/*** 获得输入日期的当月最后一天** @param date*/public static Date getLastDayOfMonth(Date date) {return DateUtils.addDay(DateUtils.getFirstDayOfMonth(DateUtils.addMonth(date, 1)), -1);}/*** 判断是否是闰年** @param date 输入日期* @return 是true 否false*/public static boolean isLeapYEAR(Date date) {Calendar cd = Calendar.getInstance();cd.setTime(date);int year = cd.get(Calendar.YEAR);if (year % 4 == 0 && year % 100 != 0 | year % 400 == 0) {return true;} else {return false;}}/*** 根据整型数表示的年月日，生成日期类型格式** @param year  年* @param month 月* @param day   日* @return*/public static Date getDateByYMD(int year, int month, int day) {Calendar cd = Calendar.getInstance();cd.set(year, month - 1, day);return cd.getTime();}/*** 获取年周期对应日** @param date  输入日期* @param iyear 年数  負數表示之前* @return*/public static Date getYearCycleOfDate(Date date, int iyear) {Calendar cd = Calendar.getInstance();cd.setTime(date);cd.add(Calendar.YEAR, iyear);return cd.getTime();}/*** 获取月周期对应日** @param date 输入日期* @param i* @return*/public static Date getMonthCycleOfDate(Date date, int i) {Calendar cd = Calendar.getInstance();cd.setTime(date);cd.add(Calendar.MONTH, i);return cd.getTime();}/*** 计算 fromDate 到 toDate 相差多少年** @param fromDate* @param toDate* @return 年数*/public static int getYearByMinusDate(Date fromDate, Date toDate) {Calendar df = Calendar.getInstance();df.setTime(fromDate);Calendar dt = Calendar.getInstance();dt.setTime(toDate);return dt.get(Calendar.YEAR) - df.get(Calendar.YEAR);}/*** 计算 fromDate 到 toDate 相差多少个月** @param fromDate* @param toDate* @return 月数*/public static int getMonthByMinusDate(Date fromDate, Date toDate) {Calendar df = Calendar.getInstance();df.setTime(fromDate);Calendar dt = Calendar.getInstance();dt.setTime(toDate);return dt.get(Calendar.YEAR) * 12 + dt.get(Calendar.MONTH) -(df.get(Calendar.YEAR) * 12 + df.get(Calendar.MONTH));}/*** 计算 fromDate 到 toDate 相差多少天** @param fromDate* @param toDate* @return 天数*/public static long getDayByMinusDate(Object fromDate, Object toDate) {Date f = DateUtils.chgObject(fromDate);Date t = DateUtils.chgObject(toDate);long fd = f.getTime();long td = t.getTime();return (td - fd) / (24L * 60L * 60L * 1000L);}/*** 计算年龄** @param birthday 生日日期* @param calcDate 要计算的日期点* @return*/public static int calcAge(Date birthday, Date calcDate) {int cYear = DateUtils.getYearOfDate(calcDate);int cMonth = DateUtils.getMonthOfDate(calcDate);int cDay = DateUtils.getDayOfDate(calcDate);int bYear = DateUtils.getYearOfDate(birthday);int bMonth = DateUtils.getMonthOfDate(birthday);int bDay = DateUtils.getDayOfDate(birthday);if (cMonth > bMonth || (cMonth == bMonth && cDay > bDay)) {return cYear - bYear;} else {return cYear - 1 - bYear;}}/*** 从身份证中获取出生日期** @param idno 身份证号码* @return*/public static String getBirthDayFromIDCard(String idno) {Calendar cd = Calendar.getInstance();if (idno.length() == 15) {cd.set(Calendar.YEAR, Integer.parseInt("19" + idno.substring(6, 8)));cd.set(Calendar.MONTH, Integer.parseInt(idno.substring(8, 10)) - 1);cd.set(Calendar.DAY_OF_MONTH, Integer.parseInt(idno.substring(10, 12)));} else if (idno.length() == 18) {cd.set(Calendar.YEAR, Integer.parseInt(idno.substring(6, 10)));cd.set(Calendar.MONTH, Integer.parseInt(idno.substring(10, 12)) - 1);cd.set(Calendar.DAY_OF_MONTH, Integer.parseInt(idno.substring(12, 14)));}return DateUtils.dateToString(cd.getTime());}/*** 在输入日期上增加（+）或减去（-）天数** @param date 输入日期* @param iday 要增加或减少的天数*/public static Date addDay(Date date, int iday) {Calendar cd = Calendar.getInstance();cd.setTime(date);cd.add(Calendar.DAY_OF_MONTH, iday);return cd.getTime();}/*** 在输入日期上增加（+）或减去（-）月份** @param date   输入日期* @param imonth 要增加或减少的月分数*/public static Date addMonth(Date date, int imonth) {Calendar cd = Calendar.getInstance();cd.setTime(date);cd.add(Calendar.MONTH, imonth);return cd.getTime();}/*** 在输入日期上增加（+）或减去（-）年份** @param date  输入日期* @param iyear 要增加或减少的年数*/public static Date addYear(Date date, int iyear) {Calendar cd = Calendar.getInstance();cd.setTime(date);cd.add(Calendar.YEAR, iyear);return cd.getTime();}/*** 將OBJECT類型轉換為Date** @param date* @return*/public static Date chgObject(Object date) {if (date instanceof Date) {return (Date) date;}if (date instanceof String) {return DateUtils.stringToDate((String) date);}return null;}}

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