史上最全日期工具类---------->DateUtils
往下看可能你想要的就在里面
/**
* 日期工具类
*/
public class DateUtil {
public static String dateString = "yyyy-MM-dd HH:mm:ss";
public static String dateStringNo = "yyyyMMddHHmmss";
public static String dateStringDir = "yyyyMMdd";
public static String str = "yyyy-MM";
public static String strYYYYMMMDD = "yyyy-MM-dd";
private static DateFormat dateFormat = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
private static DateFormat dayFormat = new SimpleDateFormat("yy-MM-dd");
public static ThreadLocal<SimpleDateFormat> threadSDF = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
}
};
public static ThreadLocal<SimpleDateFormat> threadSB = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd");
}
};
/**
* 日期转字符串
*
* @param date
* @return
*/
public static String DateToString(Date date) {
SimpleDateFormat formatter = new SimpleDateFormat(dateString);
String dateString = formatter.format(date);
return dateString;
}
/**
* 日期转字符串
*
* @param date
* @return
*/
public static String DToString(Date date) {
SimpleDateFormat formatter = new SimpleDateFormat(strYYYYMMMDD);
String dateString = formatter.format(date);
return dateString;
}
/**
* 日期转字符串
*
* @param date
* @return
*/
public static String FormatDate(String date) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(dateString);
SimpleDateFormat df = new SimpleDateFormat(str);
return sdf.format(df.parse(date));
}
/**
* 去掉时分秒，返回年月日yy-MM-dd HH:mm:ss -> yyyy-MM-dd
*
* @param date
* @return yyyy-MM-dd
* @throws ParseException
*/
public static String FormatDateStr(String date) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat(strYYYYMMMDD);
SimpleDateFormat df = new SimpleDateFormat(strYYYYMMMDD);
return sdf.format(df.parse(date));
}
/**
* 日期转字符串
*
* @param date
* @return
*/
private static final SimpleDateFormat sdf = new SimpleDateFormat(dateString);
public static Date StringToDate(String date) throws ParseException {
return DateUtil.threadSDF.get().parse(date);
}
/**
* 返回季度开始结束年月
*
* @param
* @return
*/
public static List<String> StringToList(String latestTime) {
List<String> list = Lists.newArrayList();
String year = latestTime.split("-")[0];
int month = Integer.parseInt(latestTime.split("-")[1]);
if (month >= 1 && month <= 3) {
list.add(year + "-01-01 00:00:00");
list.add(year + "-02-01 00:00:00");
list.add(year + "-03-01 00:00:00");
} else if (month >= 4 && month <= 6) {
list.add(year + "-04-01 00:00:00");
list.add(year + "-05-01 00:00:00");
list.add(year + "-06-01 00:00:00");
} else if (month >= 7 && month <= 9) {
list.add(year + "-07-01 00:00:00");
list.add(year + "-08-01 00:00:00");
list.add(year + "-09-01 00:00:00");
} else {
list.add(year + "-10-01 00:00:00");
list.add(year + "-11-01 00:00:00");
list.add(year + "-12-01 00:00:00");
}
return list;
}
/**
* 返回月上旬中旬下旬开始结束年月
*
* @param
* @return
*/
public static Map<String, String> MonthToList(String monthStr, int flag) {
Map dateMap = Maps.newHashMap();
List list = Lists.newArrayList();
list.add("1");
list.add("3");
list.add("5");
list.add("7");
list.add("8");
list.add("10");
list.add("12");
String year = monthStr.split("-")[0];
int month = Integer.parseInt(monthStr.split("-")[1]);
if (flag == 1) {
dateMap.put("beginDate", year + "-" + month + "-01 00:00:00");
dateMap.put("endDate", year + "-" + month + "-10 23:59:59");
}
if (flag == 2) {
dateMap.put("beginDate", year + "-" + month + "-11 00:00:00");
dateMap.put("endDate", year + "-" + month + "-20 23:59:59");
}
if (flag == 3) {
dateMap.put("beginDate", year + "-" + month + "-21 00:00:00");
if (list.contains(month + "")) {
dateMap.put("endDate", year + "-" + month + "-31 23:59:59");
} else {
if ("2".equals(month + "")) {
if ((Integer.parseInt(year) % 4 == 0) && (Integer.parseInt(year) % 100 != 0) || (Integer.parseInt(year) % 400 == 0)) {
dateMap.put("endDate", year + "-" + month + "-29 23:59:59");
} else {
dateMap.put("endDate", year + "-" + month + "-28 23:59:59");
}
} else {
dateMap.put("endDate", year + "-" + month + "-30 23:59:59");
}
}
}
return dateMap;
}
/**
* 获取当前日期时间戳字符串
*
* @return
*/
public static String getCurrentDate() {
return DateToString(new Date());
}
/**
* 获取当前年
*
* @return
*/
public static String getCurrentYear() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy");
String dateString = formatter.format(new Date());
return dateString;
}
/**
* 获取当前日期时间戳字符串
*
* @return
*/
public static String getCurrentTime() {
return DToString(new Date());
}
public static String DateToNo(Date date) {
SimpleDateFormat formatter = new SimpleDateFormat(dateStringNo);
String dateString = formatter.format(date);
return dateString;
}
public static String getDays() {
SimpleDateFormat formatter = new SimpleDateFormat(dateStringDir);
String dateString = formatter.format(new Date());
return dateString;
}
public static long DateStringToLong(String str) throws ParseException {
SimpleDateFormat formatter = new SimpleDateFormat(dateString);
Date date = formatter.parse(str);
return date.getTime();
}
public static String DateToDir(Date date) throws ParseException {
SimpleDateFormat formatter = new SimpleDateFormat(dateStringDir);
String dateString = formatter.format(date);
return dateString;
}
/**
* 获取昨天开始时间和结束时间
*
* @return
*/
public static Map getYesterdayRange(String date) throws ParseException {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); // HH:mm:ss
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Map condition = Maps.newHashMap();
Calendar calendar = Calendar.getInstance();
calendar.setTime(df.parse(date));
calendar.set(Calendar.MILLISECOND, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.HOUR_OF_DAY, 0);
condition.put("endDate", sdf.format(calendar.getTime()));
calendar.set(Calendar.HOUR_OF_DAY, -24);
condition.put("startDate", sdf.format(calendar.getTime()));
return condition;
}
/**
* 获得近一周的开始时间和结束时间
*
* @return
*/
public static Map getDaySevenRange() {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Map condition = Maps.newHashMap();
Calendar calendar = Calendar.getInstance();
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH),
0, 0, 0);
calendar.set(Calendar.HOUR_OF_DAY, 24);
condition.put("endDate", df.format(calendar.getTime()));
calendar.set(Calendar.HOUR_OF_DAY, -168);
condition.put("startDate", df.format(calendar.getTime()));
return condition;
}
/**
* 获得近一月的开始时间和结束时间
*
* @return
*/
public static Map getDayMonthRange() {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Map condition = Maps.newHashMap();
Calendar calendar = Calendar.getInstance();
calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH),
0, 0, 0);
calendar.set(Calendar.HOUR_OF_DAY, 24);
condition.put("endDate", df.format(calendar.getTime()));
calendar.set(Calendar.HOUR_OF_DAY, -720);
condition.put("startDate", df.format(calendar.getTime()));
return condition;
}
/**
* 获得指定日期的前一天
*
* @param specifiedDay
* @return
*/
public static String getSpecifiedDayBefore(String specifiedDay) throws ParseException {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dateString);
Calendar c = Calendar.getInstance();
Date date = new SimpleDateFormat(dateString).parse(specifiedDay);
c.setTime(date);
int day = c.get(Calendar.DATE);
c.set(Calendar.DATE, day - 1);
String dayBefore = new SimpleDateFormat(dateString).format(c.getTime());
return dayBefore;
}
/**
* 获得指定日期的前一天
*
* @param specifiedDay
* @return
*/
public static String getStrDayBefore(String specifiedDay) throws ParseException {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Calendar c = Calendar.getInstance();
Date date = new SimpleDateFormat("yyyy-MM-dd").parse(specifiedDay);
c.setTime(date);
int day = c.get(Calendar.DATE);
c.set(Calendar.DATE, day - 1);
String dayBefore = new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
return dayBefore;
}
/**
* 获得前一天
*
* @return
*/
public static String getDayBefore() throws ParseException {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Calendar c = Calendar.getInstance();
Date date = new Date();
c.setTime(date);
int day = c.get(Calendar.DATE);
c.set(Calendar.DATE, day - 1);
String dayBefore = simpleDateFormat.format(c.getTime());
return dayBefore;
}
/**
* 获取给定时间对应的毫秒数
*
* @param time "HH:mm:ss"
* @return
*/
private static long getTimeMillis(String time) {
try {
Date currentDate = dateFormat.parse(dayFormat.format(new Date()) + " " + time);
return currentDate.getTime();
} catch (ParseException e) {
e.printStackTrace();
}
return 0;
}
/**
* 获取日期范围类的所有日期
*
* @param startDate 开始日期
* @param endDate 结束日期
* @param dataType 1:天,2:月,3:周
* @return
*/
public static List<String> getPerDaysByStartAndEndDate(String startDate, String endDate, int dataType) {
try {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
if (dataType == 2) {
format = new SimpleDateFormat("yyyy-MM");
}
Date sDate = format.parse(startDate);
Date eDate = format.parse(endDate);
long start = sDate.getTime();
long end = eDate.getTime();
if (start > end) return null;
Calendar calendar = Calendar.getInstance();
calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置周一是一周的第一天
calendar.setMinimalDaysInFirstWeek(1);//设置一天也算一周
calendar.setTime(eDate);
List<String> res = new ArrayList();
while (end >= start) {
if (dataType == 1) {
res.add(format.format(calendar.getTime()));
calendar.add(Calendar.DAY_OF_MONTH, -1);
} else if (dataType == 2) {
res.add(new SimpleDateFormat("yyyy-MM").format(calendar.getTime()));
calendar.add(Calendar.MONTH, -1);
} else {
String weekStr = new SimpleDateFormat("yyyy年第").format(calendar.getTime());
weekStr += calendar.get(Calendar.WEEK_OF_YEAR) + "周";
res.add(weekStr);
int weekdays = calendar.get(Calendar.DAY_OF_WEEK) - 1;
weekdays = weekdays == 0 ? 7 : weekdays;
calendar.add(Calendar.DAY_OF_MONTH, -weekdays);
}
end = calendar.getTimeInMillis();
}
Collections.reverse(res);
return res;
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
public static List<String> getMonthStartAndEndDay(String startDate, String endDate) {
List<String> months = getPerDaysByStartAndEndDate(startDate, endDate, 2);
List<String> monthDays = new ArrayList<>();
for (String item : months) {
Integer day = getMonthLastDay(item);
monthDays.add(item + "-01," + item + "-" + day);
}
return monthDays;
}
/**
* 获取月份的最后一天
*
* @param date
* @return
*/
public static Integer getMonthLastDay(String date) {
try {
DateFormat format = new SimpleDateFormat("yyyy-MM");
Calendar calendar = Calendar.getInstance();
calendar.setTime(format.parse(date));
return calendar.getActualMaximum(5);
} catch (Exception e) {
e.printStackTrace();
}
return 31;
}
/**
* 获取某一年某一周的开始日期
*
* @param year
* @param week
* @return
*/
public static String getWeekFirst(int year, int week) {
try {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
cal.set(Calendar.YEAR, year);
cal.set(Calendar.WEEK_OF_YEAR, week);
return cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
} catch (Exception e) {
return "";
}
}
/**
* 获取指定日期前后某一天的日期
*
* @param date 日期
* @param day 前后多少天,之前为负数.之后为正数
* @return
*/
public static String getOneDay(String date, int day) {
try {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Calendar calendar = Calendar.getInstance();
calendar.setTime(format.parse(date));
calendar.add(Calendar.DATE, day);
return format.format(calendar.getTime());
} catch (Exception e) {
return "";
}
}
/**
* 获取之前的日期
*
* @param date 日期
* @param date 类型 1:天,2:月,3:周
*/
public static String getBeforeDate(String date, int dataType) {
try {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
if (dataType == 2) {
format = new SimpleDateFormat("yyyy-MM");
}
Calendar calendar = Calendar.getInstance();
calendar.setTime(format.parse(date));
if (dataType == 1) {
calendar.add(Calendar.DAY_OF_MONTH, -1);
return format.format(calendar.getTime());
}
if (dataType == 2) {
calendar.add(Calendar.MONTH, -1);
return new SimpleDateFormat("yyyy-MM").format(calendar.getTime());
} else {
calendar.add(Calendar.DAY_OF_MONTH, -7);
return format.format(calendar.getTime());
}
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* 获取一个月前的日期
*
* @param date
* @return
*/
public static String getBeforeMonth(String date) {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
try {
Calendar calendar = Calendar.getInstance();
calendar.setTime(format.parse(date));
calendar.add(Calendar.MONTH, -1);
calendar.add(Calendar.DAY_OF_MONTH, 1);
return format.format(calendar.getTime());
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* 获取三个月前的日期
*
* @param date
* @return
*/
public static String getThreeBeforeMonth() {
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
try {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
calendar.add(Calendar.MONTH, -3);
calendar.add(Calendar.DAY_OF_MONTH, 1);
return format.format(calendar.getTime());
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
/**
* 获取某段时间内的所有日期
* @param dStart
* @param dEnd
* @return
*/
public static List<String> findDates(String dStart, String dEnd) {
try {
Date start = threadSB.get().parse(dStart);
Date end = threadSB.get().parse(dEnd);
Calendar cStart = Calendar.getInstance();
cStart.setTime(start);
List dateList = new ArrayList();
dateList.add(dStart);
while (end.after(cStart.getTime())) {
cStart.add(Calendar.DAY_OF_MONTH, 1);
dateList.add(threadSB.get().format(cStart.getTime()));
}
return dateList;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) throws ParseException {
System.out.println(getPerDaysByStartAndEndDate("2019-10-01", "2019-10-31", 3));
}
}
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
