JAVA 日期工具类
贴代码！
package com.zy.game.utils; import java.text.ParseException; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.time.Instant; import java.time.LocalDateTime; import java.time.ZoneId; import java.time.format.DateTimeFormatter; import java.util.*; /** * @author zxq * @description 时间工具类 * @date 2020/9/27 */ public class DateUtils { public static final String FULL_TIME_SPLIT_PATTERN = "yyyy-MM-dd HH:mm:ss"; public static final String FULL_TIME_SPLIT__PATTERN = "yyyy-MM-dd-HH:mm:ss"; public static final String CST_TIME_PATTERN = "EEE MMM dd HH:mm:ss zzz yyyy"; public static final String FULL_TIME_PATTERN = "yyyyMMddHHmmss"; public static final String FULL_DAY_SPLIT_PATTERN = "yyyy-MM-dd"; public static final String FULL_TIME_NOT_DAY_PATTERN = "HH:mm"; private static final String FORMAT = "yyyy-MM-dd"; public static final String FULL_DAY_MONTH = "MM-dd"; public static final String FULL_DAY_PATTERN = "dd"; public static void main(String[] args) { } /** * @description:计算岁数 * @param birthDay * @return: int * @author: zxq * @Date: 2020/9/27 14:57 */ public static int getAge(Date birthDay) { Calendar cal = Calendar.getInstance(); if (cal.before(birthDay)) { //出生日期晚于当前时间，无法计算 throw new IllegalArgumentException( "The birthDay is before Now.It's unbelievable!"); } int yearNow = cal.get(Calendar.YEAR); //当前年份 int monthNow = cal.get(Calendar.MONTH); //当前月份 int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH); //当前日期 cal.setTime(birthDay); int yearBirth = cal.get(Calendar.YEAR); int monthBirth = cal.get(Calendar.MONTH); int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH); int age = yearNow - yearBirth; //计算整岁数 if (monthNow <= monthBirth) { if (monthNow == monthBirth) { if (dayOfMonthNow < dayOfMonthBirth) age--;//当前日期在生日之前，年龄减一 }else{ age--;//当前月份在生日之前，年龄减一 } } return age; } /** * @description:计算两个时间相差天数 * @param beginDate * @param endDate * @return: int * @author: zxq * @Date: 2020/9/27 14:47 */ public static int getDays(Date beginDate, Date endDate) { if (beginDate == null || endDate == null) { return 0; } long day = 0; try { endDate.setHours(10); endDate.setMinutes(0); endDate.setSeconds(0); double millsOfDay = 1000 * 60 * 60 * 24; double days = ((double) (endDate.getTime() - beginDate.getTime()) / millsOfDay); return (int) Math.ceil(days); } catch (Exception e) { e.printStackTrace(); } return (int) day; } /** * @description:格式化日期 * @param date * @param pattern * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:44 */ public static String dateFormat(Date date, String pattern) { String str = null; SimpleDateFormat sdf = new SimpleDateFormat(pattern); if (date != null) { str = sdf.format(date); } return str; } /** * @description: 时间格式转字符串 * @param date * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:43 */ public static String dateToString(Date date) { String str = null; SimpleDateFormat sdf = new SimpleDateFormat(FORMAT); if (date != null) { str = sdf.format(date); } return str; } /** * @description:比较时间，获取时间相差的文本 * @param endDate * @param startDate * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:42 */ public static String calYears(Date endDate, Date startDate) { try { Calendar c1 = Calendar.getInstance(); Calendar c2 = Calendar.getInstance(); c1.setTime(endDate); c2.setTime(startDate); if (c1.getTimeInMillis() < c2.getTimeInMillis()) { return "一年以下"; } int year1 = c1.get(Calendar.YEAR); int year2 = c2.get(Calendar.YEAR); int month1 = c1.get(Calendar.MONTH); int month2 = c2.get(Calendar.MONTH); int day1 = c1.get(Calendar.DAY_OF_MONTH); int day2 = c2.get(Calendar.DAY_OF_MONTH); int yearInterval = year1 - year2; if (month1 < month2 || month1 == month2 && day1 < day2) { yearInterval--; } int monthInterval = (month1 + 12) - month2; monthInterval %= 12; int months = yearInterval * 12 + monthInterval; if (months < 12) { return "一年以下"; } else if (months >= 12 && months < 36) { return "一年至三年"; } else if (months >= 36 && months < 60) { return "三年至五年"; } else { return "五年以上"; } } catch (Exception e) { e.printStackTrace(); return "一年以下"; } } /** * @description: 格式化时间为yyyyMMddHHmmss * @param localDateTime * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:06 */ public static String formatFullTime(LocalDateTime localDateTime) { return formatFullTime(localDateTime, FULL_TIME_PATTERN); } /** * @description:格式化时间为指定格式 * @param localDateTime * @param pattern * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:09 */ public static String formatFullTime(LocalDateTime localDateTime, String pattern) { DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern); return localDateTime.format(dateTimeFormatter); } /** * @description:时间格式化，返回字符串格式 * @param date * @param dateFormatType * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:09 */ public static String getDateFormat(Date date, String dateFormatType) { SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dateFormatType, Locale.CHINA); return simpleDateFormat.format(date); } /** * @description:将yyyy-MM-dd的时间字符串转换成Date类型的长字符串格式 * @param strDate * @return: java.util.Date * @author: zxq * @Date: 2020/9/27 13:49 */ public static Date strToDate(String strDate) { SimpleDateFormat formatter = new SimpleDateFormat(FORMAT); ParsePosition pos = new ParsePosition(0); Date strtodate = formatter.parse(strDate, pos); return strtodate; } /** * @description:将yyyy-MM-dd的时间字符串转换成Date类型的长字符串格式 * @param strDate * @return: java.util.Date * @author: zxq * @Date: 2020/9/27 13:49 */ public static Date strToDate(String strDate,String pattern) { SimpleDateFormat formatter = new SimpleDateFormat(pattern); ParsePosition pos = new ParsePosition(0); Date strtodate = formatter.parse(strDate, pos); return strtodate; } /** * @description: * @param date * @param format * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:10 */ public static String formatCSTTime(String date, String format) throws ParseException { SimpleDateFormat simpleDateFormat = new SimpleDateFormat(CST_TIME_PATTERN, Locale.US); Date usDate = simpleDateFormat.parse(date); return DateUtils.getDateFormat(usDate, format); } /** * @description: * @return: java.lang.Long * @author: zxq * @Date: 2020/9/27 14:10 */ public static Long getSeconds() throws ParseException { long now = System.currentTimeMillis(); SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-ddd"); return (now - (format.parse(format.format(now)).getTime())) / 1000; } /** * @description: * @param instant * @param format * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:10 */ public static String formatInstant(Instant instant, String format) { LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()); return localDateTime.format(DateTimeFormatter.ofPattern(format)); } /** * @description:获取者未来任意天内的日期数组 * @param intervals * @param pattern * @return: java.util.ArrayList<java.lang.String> * @author: zxq * @Date: 2020/9/27 14:37 */ public static ArrayList<String> getDateFuture(int intervals, String pattern) { ArrayList<String> featureDaysList = new ArrayList<>(); for (int i = 0; i <intervals; i++) { featureDaysList.add(getFutureDate(i,pattern)); } return featureDaysList; } /** * @description: 获取未来 第 past 天的日期 * @param past * @param pattern * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:37 */ public static String getFutureDate(int past,String pattern) { Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) + past); Date today = calendar.getTime(); SimpleDateFormat format = new SimpleDateFormat(pattern); String result = format.format(today); return result; } // /** // * @description:获取当前时间往后延1天的时间，得到时间集合 // * @param count // * @param fmt // * @return: java.util.List<java.lang.String> // * @author: zxq // * @Date: 2020/9/27 14:15 // */ // public static List<String> getDelayDateList(int count,String fmt) { // List<String> strList = new ArrayList<>(); // try { // for(int i=0;i<count;i++) { // String ss = getDelayDate(i,fmt); // strList.add(ss); // } // } catch (Exception e) { } // return strList; // } // // /** // * @description:获取当前时间往后延N天的时间 // * @param day // * @param fmt // * @return: java.lang.String // * @author: zxq // * @Date: 2020/9/27 14:15 // */ // public static String getDelayDate(int day,String fmt) { // try { // SimpleDateFormat df = new SimpleDateFormat(fmt); // Date date = new Date();//取时间 // Calendar calendar = Calendar.getInstance(); // calendar.setTime(date); //需要将date数据转移到Calender对象中操作 // calendar.add(Calendar.DATE, day);//把日期往后增加n天.正数往后推,负数往前移动 // date = calendar.getTime(); //这个时间就是日期往后推一天的结果 // String format = df.format(date); // return format; // }catch (Exception e){} // return ""; // } /** * 比较时间大小 * @param time1 * @return * @throws ParseException */ public static int compare(String date,String time1) throws ParseException { Calendar cal = Calendar.getInstance(); String year=String.valueOf(cal.get(Calendar.YEAR)); date = year+"-"+date; SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm"); Date dt1 = df.parse(date+" "+time1); Date now = new Date(); if (dt1.getTime() > now.getTime() ){ return 1; }else{ return 0; } } /** * @description:把时间范围划分为等分 * @param date1 * @param date2 * @param dataPattern * @param etc * @return: java.util.List<java.lang.String> * @author: zxq * @Date: 2020/9/27 14:50 */ public static List<String> splitDate(String date1, String date2, String dataPattern, Integer etc){ //1.把时间变成时间戳 List<String> str = new ArrayList<>(); long longs=strToSqlDate(date2,dataPattern)-strToSqlDate(date1,dataPattern); long single=longs/etc; for(int i=0;i<etc;i++){ long a = strToSqlDate(date1,dataPattern)+(i*single); //再把时间戳变成标准的date形式 SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dataPattern); Date date = new Date(a); str.add(simpleDateFormat.format(date)); } return str; } public static long strToSqlDate(String strDate, String dateFormat) { SimpleDateFormat sf = new SimpleDateFormat(dateFormat); Date date = null; try { date = sf.parse(strDate); } catch (ParseException e) { e.printStackTrace(); } java.sql.Timestamp dateSQL = new java.sql.Timestamp(date.getTime()); return dateSQL.getTime(); } /** * @description:获取两个时间间隔1小时的时间集合 * @param startHour * @param endHour * @return: java.util.List<java.lang.String> * @author: zxq * @Date: 2020/9/27 14:33 */ public static List<String> spiltTimeByHour(String startHour, String endHour) { List<String> retTime = new ArrayList<>(); try { SimpleDateFormat sdf = new SimpleDateFormat("HH:mm"); long difTime = (sdf.parse(endHour).getTime() - sdf.parse(startHour).getTime()) / (1000); if(difTime<0){ difTime = (sdf.parse("24:00").getTime() - sdf.parse(startHour).getTime()) / (1000); difTime += (sdf.parse(endHour).getTime() - sdf.parse("00:00").getTime()) / (1000); }else{ difTime = (sdf.parse(endHour).getTime() - sdf.parse(startHour).getTime()) / (1000); } int n = Math.abs(Integer.valueOf(String.valueOf((difTime / 60 / 30)))); Calendar c = Calendar.getInstance(); c.setTime(sdf.parse(startHour)); for (int i = 1; i < n; i++) { c.add(Calendar.MINUTE, 30); retTime.add(sdf.format(c.getTime())); } } catch (ParseException e) { } Collections.sort(retTime); return retTime; } /** * @description:获取当前时间是星期几 * @param dt * @return: java.lang.String * @author: zxq * @Date: 2020/9/27 14:12 */ public static String getWeekByDate(String dt) { try { SimpleDateFormat dateFm = new SimpleDateFormat("yyyy-MM-dd"); Date nowDate = dateFm.parse(dt); String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"}; Calendar cal = Calendar.getInstance(); cal.setTime(nowDate); int w = cal.get(Calendar.DAY_OF_WEEK) - 1; if (w < 0) { w = 0; } return weekDays[w]; }catch (Exception e){} return "未知"; } }
