DateUtils 工具类
屈星腾
public class DateUtils {
public static final String YYYY = "yyyy";
public static final String YYYY_MM = "yyyy-MM";
public static final String YYYYMM = "yyyyMM";
public static final String YYYY_MM_DD = "yyyy-MM-dd";
public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
public static final String YYYY_MM_DD_HH_MM_SS_SSS = "yyyy-MM-dd HH:mm:ss.SSS";
public static final String EEE_MMM_DD_HH_MM_SS_Z_YYYY = "EEE MMM dd HH:mm:ss Z yyyy";
/**
* 获得当前日期 yyyy-MM-dd HH:mm:ss
*
* @return 2019-08-27 14:12:40
*/
public static String getCurrentTime() {
// 小写的hh取得12小时，大写的HH取的是24小时
SimpleDateFormat df = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS);
Date date = new Date();
return df.format(date);
}
/**
* 字符串转换成日期
* @param str
* @return date
*/
public static Date StrToDate(String str) {
SimpleDateFormat format = new SimpleDateFormat(YYYY_MM_DD_HH_MM_SS);
Date date = null;
try {
date = format.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
return date;
}
/**
* 字符串转换成日期
* @param str
* @return date
*/
public static Date StrToDates(String str) {
SimpleDateFormat format = new SimpleDateFormat(YYYY_MM_DD);
Date date = null;
try {
date = format.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
return date;
}
/**
* 字符串转换成日期
* @param str
* @return date
*/
public static Date StrToDate(String str,String fromat) {
SimpleDateFormat format = new SimpleDateFormat(fromat);
Date date = null;
try {
date = format.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
return date;
}
/**
* 时间格式化为年月日
* @param date
* @param fromat
* @return
*/
public static Date dateToDate(Date date,String fromat) {
String format = new SimpleDateFormat(fromat).format(date);
Date date1 = StrToDate(format, fromat);
return date1;
}
/**
* 日期转换成字符串
* @param date
* @return date
*/
public static String DateToStr(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS);
String str = null;
try {
str = sdf.format(date);
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
/**
* 日期转换成字符串
* @param date
* @return date
*/
public static String DateToStrs(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
String str = null;
try {
str = sdf.format(date);
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
/**
* 获取系统当前时间戳
*
* @return 1566889186583
*/
public static String getSystemTime() {
String current = String.valueOf(System.currentTimeMillis());
return current;
}
/**
* 获取当前日期 yy-MM-dd
*
* @return 2019-08-27
*/
public static String getDateByString() {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
return sdf.format(date);
}
/**
* 得到两个时间差 格式yyyy-MM-dd HH:mm:ss
*
* @param start 2019-06-27 14:12:40
* @param end 2019-08-27 14:12:40
* @return 5270400000
*/
public static long dateSubtraction(String start, String end) {
SimpleDateFormat df = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS);
try {
Date date1 = df.parse(start);
Date date2 = df.parse(end);
return date2.getTime() - date1.getTime();
} catch (ParseException e) {
e.printStackTrace();
return 0;
}
}
/**
* 得到两个时间差
*
* @param start 开始时间
* @param end 结束时间
* @return
*/
public static long dateTogether(Date start, Date end) {
return end.getTime() - start.getTime();
}
/**
* 格式化时间后得到两个时间差
*
* @param start 开始时间
* @param end 结束时间
* @return
*/
public static long formatDateToGether(Date start, Date end,String format) {
start = dateToDate(start, format);
end = dateToDate(end, format);
return end.getTime() - start.getTime();
}
/**
* 转化long值的日期为yyyy-MM-dd HH:mm:ss.SSS格式的日期
*
* @param millSec 日期long值 5270400000
* @return 日期，以yyyy-MM-dd HH:mm:ss.SSS格式输出 1970-03-03 08:00:00.000
*/
public static String transferLongToDate(String millSec) {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS_SSS);
Date date = new Date(Long.parseLong(millSec));
return sdf.format(date);
}
/**
* 获得当前日期 yyyy-MM-dd HH:mm:ss
*
* @return
*/
public static String getOkDate(String date) {
try {
if (StringUtils.isEmpty(date)) {
return null;
}
Date date1 = new SimpleDateFormat(DateUtils.EEE_MMM_DD_HH_MM_SS_Z_YYYY, Locale.ENGLISH).parse(date);
//格式化
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS);
return sdf.format(date1);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 获取当前日期是一个星期的第几天
*
* @return 2
*/
public static int getDayOfWeek() {
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
return cal.get(Calendar.DAY_OF_WEEK) - 1;
}
/**
* 判断当前时间是否在[startTime, endTime]区间，注意时间格式要一致
*
* @param nowTime 当前时间
* @param dateSection 时间区间 2018-01-08,2019-09-09
* @return
* @author jqlin
*/
public static boolean isEffectiveDate(Date nowTime, String dateSection) {
try {
String[] times = dateSection.split(",");
String format = DateUtils.YYYY_MM_DD;
Date startTime = new SimpleDateFormat(format).parse(times[0]);
Date endTime = new SimpleDateFormat(format).parse(times[1]);
if (nowTime.getTime() == startTime.getTime()
|| nowTime.getTime() == endTime.getTime()) {
return true;
}
Calendar date = Calendar.getInstance();
date.setTime(nowTime);
Calendar begin = Calendar.getInstance();
begin.setTime(startTime);
Calendar end = Calendar.getInstance();
end.setTime(endTime);
if (isSameDay(date, begin) || isSameDay(date, end)) {
return true;
}
if (date.after(begin) && date.before(end)) {
return true;
} else {
return false;
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public static boolean isSameDay(Calendar cal1, Calendar cal2) {
if (cal1 != null && cal2 != null) {
return cal1.get(0) == cal2.get(0) && cal1.get(1) == cal2.get(1) && cal1.get(6) == cal2.get(6);
} else {
throw new IllegalArgumentException("The date must not be null");
}
}
public static long getTimeByDate(String time) {
SimpleDateFormat format = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS);
try {
Date date = format.parse(time);
//日期转时间戳（毫秒）
return date.getTime();
} catch (Exception e) {
e.printStackTrace();
return 0;
}
}
/**
* 获取当前小时 ：2019-08-23 17
*
* @return 2019-08-27 17
*/
public static String getCurrentHour() {
GregorianCalendar calendar = new GregorianCalendar();
int hour = calendar.get(Calendar.HOUR_OF_DAY);
if (hour < 10) {
return DateUtils.getCurrentTime() + " 0" + hour;
}
return DateUtils.getDateByString() + " " + hour;
}
/**
* 获取当前系统时间 yyyy-MM-dd HH:mm:ss
* @return
*/
public static String getCurrentDate(){
SimpleDateFormat dateformat = new SimpleDateFormat(DateUtils.YYYY_MM_DD_HH_MM_SS);
String dateStr = dateformat.format(System.currentTimeMillis());
return dateStr;
}
/**
* 获取当前年月YYYYMM
*
* @return 2019-08-27 17
*/
public static String getCurrentMonth() {
GregorianCalendar calendar = new GregorianCalendar();
int hour = calendar.get(Calendar.HOUR_OF_DAY);
if (hour < 10) {
return DateUtils.getCurrentTime() + " 0" + hour;
}
return DateUtils.getDateByString() + " " + hour;
}
/**
* 获取当前时间一个小时前
* @return 2019-08-27 16
*/
public static String getCurrentHourBefore() {
GregorianCalendar calendar = new GregorianCalendar();
int hour = calendar.get(Calendar.HOUR_OF_DAY);
if (hour > 0) {
hour = calendar.get(Calendar.HOUR_OF_DAY) - 1;
if (hour < 10) {
return DateUtils.getDateByString() + " 0" + hour;
}
return DateUtils.getDateByString() + " " + hour;
}
//获取当前日期前一天
return DateUtils.getBeforeDay() + " " + 23;
}
/**
* 获取当前日期前一天
*
* @return 2019-08-26
*/
public static String getBeforeDay() {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
Date date = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, -1);
date = calendar.getTime();
return sdf.format(date);
}
/**
* 获取当前日期前num天的日期
* @param num
* @return
*/
public static String getBeforeDay(Integer num) {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
Date date = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, -num);
date = calendar.getTime();
return sdf.format(date);
}
/**
* 获取最近七天
*
* @return 2019-08-20
*/
public static String getServen() {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, -7);
Date monday = c.getTime();
String preMonday = sdf.format(monday);
return preMonday;
}
/**
* 获取最近一个月
*
* @return 2019-07-27
*/
public static String getOneMonth() {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
Calendar c = Calendar.getInstance();
c.add(Calendar.MONTH, -1);
Date monday = c.getTime();
String preMonday = sdf.format(monday);
return preMonday;
}
/**
* 获取最近三个月
*
* @return 2019-05-27
*/
public static String getThreeMonth() {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
Calendar c = Calendar.getInstance();
c.add(Calendar.MONTH, -3);
Date monday = c.getTime();
String preMonday = sdf.format(monday);
return preMonday;
}
/**
* 获取最近一年
*
* @return 2018-08-27
*/
public static String getOneYear() {
SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
Calendar c = Calendar.getInstance();
c.add(Calendar.YEAR, -1);
Date start = c.getTime();
String startDay = sdf.format(start);
return startDay;
}
private static int month = Calendar.getInstance().get(Calendar.MONTH) + 1;
/**
* 获取今年月份数据
* 说明 有的需求前端需要根据月份查询每月数据，此时后台给前端返回今年共有多少月份
*
* @return [1, 2, 3, 4, 5, 6, 7, 8]
*/
public static List getMonthList(){
List list = new ArrayList();
for (int i = 1; i <= month; i++) {
list.add(i);
}
return list;
}
/**
* 返回当前年度季度list
* 本年度截止目前共三个季度，然后根据1,2,3分别查询相关起止时间
* @return [1, 2, 3]
*/
public static List getQuartList(){
int quart = month / 3 + 1;
List list = new ArrayList();
for (int i = 1; i <= quart; i++) {
list.add(i);
}
return list;
}
/**
* 时间转换为字符串
*
* @return返回字符串格式 yyyy-MM-dd HH:mm:ss
*/
public static String dateToString(Date date,String format) {
if(StringUtils.isEmpty(format)){
format= DateUtils.YYYY_MM_DD_HH_MM_SS;
}
SimpleDateFormat formatter = new SimpleDateFormat(format);
String dateString = formatter.format(date);
return dateString;
}
/**
* 获取当前0点的时间戳
* @return
*/
public static long getStartOfTodayTime() {
LocalDate localDate = LocalDate.now();
LocalDateTime dateTime = LocalDateTime.of(localDate.getYear(), localDate.getMonth(), localDate.getDayOfMonth(), 0, 0, 0);
return dateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
}
/**
* 判断日期是不是今天
* @param date 执行时间
* @return 是返回true，不是返回false
*/
public static boolean isNow(Date date) {
// 当前时间
Date now = new Date();
SimpleDateFormat sf = new SimpleDateFormat(DateUtils.YYYY_MM_DD);
//获取今天的日期
String nowDay = sf.format(now);
//对比的时间
String day = sf.format(date);
return day.equals(nowDay);
}
public static String getCurrDate() {
DateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
Calendar calendar = Calendar.getInstance();
String dateName = df.format(calendar.getTime());
return dateName;
}
/**
* 获取日期格式的文件名
* 匹配字符串中特殊符号和空格，并且替换为中划线“-”
* @param str 2021-11-14 16:20:19.157
* @return 2021-11-14-16-20-19-157
*/
public static String getDateFileName(String str){
//第一个为空格
String regEx ="[ `~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher(str);
// System.out.println(m.replaceAll("-").trim());
return m.replaceAll("-").trim();
}
/**
* 计算当前日期距离到期日期天数
* @param date
* @return
* @throws ParseException
*/
public static int getDifferDate(String date) throws ParseException {
// 日期格式化
DateFormat simpleFormat = new SimpleDateFormat("yyyyMMdd");
String s = dateToString(new Date(), "yyyyMMdd");
Date startDate = simpleFormat.parse(s);
Date endDate = simpleFormat.parse(date);
long startTime = startDate.getTime();
long endTime = endDate.getTime();
int days = (int) ((endTime - startTime) / (1000 * 60 * 60 * 24));
return days;
}
/**
* 对比日期大小
* @param date1
* @param date2
* @return date1小于date2返回-1，date1大于date2返回1，相等返回0
*/
public static int dateCompare(Date date1,Date date2) {
int i = date1.compareTo(date2);
return i;
}
public static void main(String[] args) {
Date date = new Date();
String s = "2021-12-01 00:00:00";
Date toDate = DateUtils.StrToDate(s);
String s2 = "2021-12-01 00:00:00";
Date toDates = DateUtils.StrToDate(s2);
int i = date.compareTo(toDate);
System.out.println("i = " + i);
}
}
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