import java.text.DateFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
public class DatetimeUtil {
public static final String C_TIME_PATTON_DEFAULT = "yyyy-MM-dd HH:mm:ss";
// 用来全局控制 上一周，本周，下一周的周数变化
private static int weeks = 0;
private static int MaxDate;// 一月最大天数
private static int MaxYear;// 一年最大天数
/**
* @param args
*/
public static void main(String[] args) {
System.out.println("一周前日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(-7)));
System.out.println("两天前日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(-2)));
System.out.println("昨天日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(-1)));
System.out.println("今天日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(0)));
System.out.println("明天日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(1)));
System.out.println("两天后日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(2)));
System.out.println("一周后日期：" + DatetimeUtil.date2String(DatetimeUtil.addDays(7)));
System.out.println("获取当天日期:" + DatetimeUtil.getNowTime("yyyy-MM-dd"));
System.out.println("获取本周一日期:" + DatetimeUtil.getMondayOFWeek());
System.out.println("获取本周日的日期~:" + DatetimeUtil.getCurrentWeekday());
System.out.println("获取上周一日期:" + DatetimeUtil.getPreviousWeekday());
System.out.println("获取上周日日期:" + DatetimeUtil.getPreviousWeekSunday());
System.out.println("获取下周一日期:" + DatetimeUtil.getNextMonday());
System.out.println("获取下周日日期:" + DatetimeUtil.getNextSunday());
System.out.println("获取本月第一天日期:" + DatetimeUtil.getFirstDayOfMonth());
System.out.println("获取本月最后一天日期:" + DatetimeUtil.getDefaultDay());
System.out.println("获取上月第一天日期:" + DatetimeUtil.getPreviousMonthFirst());
System.out.println("获取上月最后一天的日期:" + DatetimeUtil.getPreviousMonthEnd());
System.out.println("获取下月第一天日期:" + DatetimeUtil.getNextMonthFirst());
System.out.println("获取下月最后一天日期:" + DatetimeUtil.getNextMonthEnd());
System.out.println("获取本年的第一天日期:" + DatetimeUtil.getCurrentYearFirst());
System.out.println("获取本年最后一天日期:" + DatetimeUtil.getCurrentYearEnd());
System.out.println("获取去年的第一天日期:" + DatetimeUtil.getPreviousYearFirst());
System.out.println("获取去年的最后一天日期:" + DatetimeUtil.getPreviousYearEnd());
System.out.println("获取明年第一天日期:" + DatetimeUtil.getNextYearFirst());
System.out.println("获取明年最后一天日期:" + DatetimeUtil.getNextYearEnd());
System.out.println("获取本季度第一天到最后一天:" + DatetimeUtil.getThisSeasonTime(11));
System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:" + DatetimeUtil.getTwoDay("2008-12-1", "2008-9-29"));
}
/**
* 获得当前时间，格式yyyy-MM-dd hh:mm:ss
*
* @param format
* @return
*/
public static String getCurrentDate() {
return getCurrentDate(C_TIME_PATTON_DEFAULT);
}
/**
* 获得当前时间，格式自定义
*
* @param format
* @return
*/
public static String getCurrentDate(String format) {
if (!"".equals(format)) {
format = C_TIME_PATTON_DEFAULT;
}
Calendar day = Calendar.getInstance();
day.add(Calendar.DATE, 0);
SimpleDateFormat sdf = new SimpleDateFormat(format);// "yyyy-MM-dd"
String date = sdf.format(day.getTime());
return date;
}
/**
* 日期转字符串
*
* @param date
* @return
*/
public static String date2String(Date date) {
SimpleDateFormat sdf = new SimpleDateFormat(C_TIME_PATTON_DEFAULT);
return sdf.format(date);
}
/**
* 获得昨天时间
*
* @return
*/
public static String getYesterdayDate() {
return getYesterdayDate(C_TIME_PATTON_DEFAULT);
}
/**
* 获得昨天时间，格式自定义
*
* @param format
* @return
*/
public static String getYesterdayDate(String format) {
if (!"".equals(format)) {
format = C_TIME_PATTON_DEFAULT;
}
Calendar day = Calendar.getInstance();
day.add(Calendar.DATE, -1);
SimpleDateFormat sdf = new SimpleDateFormat(format);// "yyyy-MM-dd"
String date = sdf.format(day.getTime());
return date;
}
/**
* @param date1 需要比较的时间 不能为空(null),需要正确的日期格式 ,如：2009-09-12
* @param date2 被比较的时间 为空(null)则为当前时间
* @param stype 返回值类型 0为多少天，1为多少个月，2为多少年
* @return 举例： compareDate("2009-09-12", null, 0); //比较天 compareDate("2009-09-12", null, 1);//比较月
* compareDate("2009-09-12", null, 2);//比较年
*/
public static int compareDate(String startDay, String endDay, int stype) {
int n = 0;
String formatStyle = stype == 1 ? "yyyy-MM" : "yyyy-MM-dd";
endDay = endDay == null ? getCurrentDate("yyyy-MM-dd") : endDay;
DateFormat df = new SimpleDateFormat(formatStyle);
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
try {
c1.setTime(df.parse(startDay));
c2.setTime(df.parse(endDay));
} catch (Exception e3) {
System.out.println("wrong occured");
}
// List list = new ArrayList();
while (!c1.after(c2)) { // 循环对比，直到相等，n 就是所要的结果
// list.add(df.format(c1.getTime())); // 这里可以把间隔的日期存到数组中 打印出来
n++;
if (stype == 1) {
c1.add(Calendar.MONTH, 1); // 比较月份，月份+1
} else {
c1.add(Calendar.DATE, 1); // 比较天数，日期+1
}
}
n = n - 1;
if (stype == 2) {
n = (int) n / 365;
}
// System.out.println(startDay+" -- "+endDay+" 相差多少"+u[stype]+":"+n);
return n;
}
/**
* 判断时间是否符合时间格式
*/
public static boolean isDate(String date, String dateFormat) {
if (date != null) {
java.text.SimpleDateFormat format = new java.text.SimpleDateFormat(dateFormat);
format.setLenient(false);
try {
format.format(format.parse(date));
} catch (ParseException e) {
return false;
}
return true;
}
return false;
}
/**
* 实现给定某日期，判断是星期几 date:必须yyyy-MM-dd格式
*/
public static String getWeekday(String date) {
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
SimpleDateFormat sdw = new SimpleDateFormat("E");
Date d = null;
try {
d = sd.parse(date);
} catch (ParseException e) {
e.printStackTrace();
}
return sdw.format(d);
}
/**
* method 将字符串类型的日期转换为一个timestamp（时间戳记java.sql.Timestamp）
*
* @param dateString 需要转换为timestamp的字符串
* @return dataTime timestamp
*/
public final static java.sql.Timestamp string2Time(String dateString) {
DateFormat dateFormat;
dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ENGLISH);// 设定格式
dateFormat.setLenient(false);
java.util.Date date = null;
try {
date = dateFormat.parse(dateString);
} catch (ParseException e) {
e.printStackTrace();
}
// java.sql.Timestamp dateTime = new java.sql.Timestamp(date.getTime());
return new java.sql.Timestamp(date.getTime());// Timestamp类型,timeDate.getTime()返回一个long型
}
/**
* method 将字符串类型的日期转换为一个Date（java.sql.Date）
*
* @param dateString 需要转换为Date的字符串
* @return dataTime Date
*/
public final static java.sql.Date string2Date(String dateString) {
DateFormat dateFormat;
dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
dateFormat.setLenient(false);
java.util.Date date = null;
try {
date = dateFormat.parse(dateString);
} catch (ParseException e) {
e.printStackTrace();
}
// java.sql.Date dateTime = new java.sql.Date(date.getTime());// sql类型
return new java.sql.Date(date.getTime());
}
/**
* 计算两个日期之间相差的天数
*
* @param date1
* @param date2
* @return
*/
public static int daysBetween(Date date1, Date date2) {
Calendar cal = Calendar.getInstance();
cal.setTime(date1);
long time1 = cal.getTimeInMillis();
cal.setTime(date2);
long time2 = cal.getTimeInMillis();
long between_days = (time2 - time1) / (1000 * 3600 * 24);
return Integer.parseInt(String.valueOf(between_days));
}
/**
* 取得当前日期N天后的日期
*
* @param date
* @param days
* @return
*/
public static Date addDays(int days) {
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_MONTH, days);
return cal.getTime();
}
/**
* 取得指定日期N天后的日期
*
* @param date
* @param days
* @return
*/
public static Date addXDays(Date date, int days) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.DAY_OF_MONTH, days);
return cal.getTime();
}
// 记录考勤， 记录迟到、早退时间
public static String getState() {
String state = "正常";
DateFormat df = new SimpleDateFormat("HH:mm:ss");
Date d = new Date();
try {
Date d1 = df.parse("08:00:00");
Date d2 = df.parse(df.format(d));
Date d3 = df.parse("17:30:00");
int t1 = (int) d1.getTime();
int t2 = (int) d2.getTime();
int t3 = (int) d3.getTime();
if (t2 < t1) {
long between = (t1 - t2) / 1000;// 除以1000是为了转换成秒
long hour1 = between % (24 * 3600) / 3600;
long minute1 = between % 3600 / 60;
state = "迟到 ：" + hour1 + "时" + minute1 + "分";
} else if (t2 < t3) {
long between = (t3 - t2) / 1000;// 除以1000是为了转换成秒
long hour1 = between % (24 * 3600) / 3600;
long minute1 = between % 3600 / 60;
state = "早退 ：" + hour1 + "时" + minute1 + "分";
}
return state;
} catch (Exception e) {
return state;
}
}
/**
* 得到二个日期间的间隔天数
*/
public static String getTwoDay(String sj1, String sj2) {
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
long day = 0;
try {
java.util.Date date = myFormatter.parse(sj1);
java.util.Date mydate = myFormatter.parse(sj2);
day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
} catch (Exception e) {
return "";
}
return day + "";
}
/**
* 根据一个日期，返回是星期几的字符串
*
* @param sdate
* @return
*/
public static String getWeek(String sdate) {
// 再转换为时间
Date date = strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(date);
// int hour=c.get(Calendar.DAY_OF_WEEK);
// hour中存的就是星期几了，其范围 1~7
// 1=星期日 7=星期六，其他类推
return new SimpleDateFormat("EEEE").format(c.getTime());
}
/**
* 将短时间格式字符串转换为时间 yyyy-MM-dd
*
* @param strDate
* @return
*/
public static Date strToDate(String strDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(strDate, pos);
return strtodate;
}
/**
* 两个时间之间的天数
*
* @param date1
* @param date2
* @return
*/
public static long getDays(String date1, String date2) {
if (date1 == null || date1.equals("")) return 0;
if (date2 == null || date2.equals("")) return 0;
// 转换为标准时间
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
java.util.Date date = null;
java.util.Date mydate = null;
try {
date = myFormatter.parse(date1);
mydate = myFormatter.parse(date2);
} catch (Exception e) {
}
long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
return day;
}
// 计算当月最后一天,返回字符串
public static String getDefaultDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
str = sdf.format(lastDate.getTime());
return str;
}
// 上月第一天
public static String getPreviousMonthFirst() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
lastDate.add(Calendar.MONTH, -1);// 减一个月，变为下月的1号
// lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天
str = sdf.format(lastDate.getTime());
return str;
}
// 获取当月第一天
public static String getFirstDayOfMonth() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
str = sdf.format(lastDate.getTime());
return str;
}
// 获得本周星期日的日期
public static String getCurrentWeekday() {
weeks = 0;
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
// 获取当天时间
public static String getNowTime(String dateformat) {
Date now = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);// 可以方便地修改日期格式
String hehe = dateFormat.format(now);
return hehe;
}
// 获得当前日期与本周日相差的天数
public static int getMondayPlus() {
Calendar cd = Calendar.getInstance();
// 获得今天是一周的第几天，星期日是第一天，星期二是第二天......
int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; // 因为按中国礼拜一作为第一天所以这里减1
if (dayOfWeek == 1) {
return 0;
} else {
return 1 - dayOfWeek;
}
}
// 获得本周一的日期
public static String getMondayOFWeek() {
weeks = 0;
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
// 获得相应周的周六的日期
public static String getSaturday() {
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
// 获得上周星期日的日期
public static String getPreviousWeekSunday() {
weeks = 0;
weeks--;
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
// 获得上周星期一的日期
public static String getPreviousWeekday() {
weeks--;
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
// 获得下周星期一的日期
public static String getNextMonday() {
weeks++;
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 7);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
// 获得下周星期日的日期
public static String getNextSunday() {
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
Date monday = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preMonday = df.format(monday);
return preMonday;
}
public static int getMonthPlus() {
Calendar cd = Calendar.getInstance();
int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
cd.set(Calendar.DATE, 1);// 把日期设置为当月第一天
cd.roll(Calendar.DATE, -1);// 日期回滚一天，也就是最后一天
MaxDate = cd.get(Calendar.DATE);
if (monthOfNumber == 1) {
return -MaxDate;
} else {
return 1 - monthOfNumber;
}
}
// 获得上月最后一天的日期
public static String getPreviousMonthEnd() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.MONTH, -1);// 减一个月
lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
str = sdf.format(lastDate.getTime());
return str;
}
// 获得下个月第一天的日期
public static String getNextMonthFirst() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.MONTH, 1);// 减一个月
lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
str = sdf.format(lastDate.getTime());
return str;
}
// 获得下个月最后一天的日期
public static String getNextMonthEnd() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.MONTH, 1);// 加一个月
lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
str = sdf.format(lastDate.getTime());
return str;
}
// 获得明年最后一天的日期
public static String getNextYearEnd() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.YEAR, 1);// 加一个年
lastDate.set(Calendar.DAY_OF_YEAR, 1);
lastDate.roll(Calendar.DAY_OF_YEAR, -1);
str = sdf.format(lastDate.getTime());
return str;
}
// 获得明年第一天的日期
public static String getNextYearFirst() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.YEAR, 1);// 加一个年
lastDate.set(Calendar.DAY_OF_YEAR, 1);
str = sdf.format(lastDate.getTime());
return str;
}
// 获得本年有多少天
public static int getMaxYear() {
Calendar cd = Calendar.getInstance();
cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
return MaxYear;
}
public static int getYearPlus() {
Calendar cd = Calendar.getInstance();
int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天
cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
if (yearOfNumber == 1) {
return -MaxYear;
} else {
return 1 - yearOfNumber;
}
}
// 获得本年第一天的日期
public static String getCurrentYearFirst() {
int yearPlus = getYearPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, yearPlus);
Date yearDay = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preYearDay = df.format(yearDay);
return preYearDay;
}
// 获得本年最后一天的日期 *
public static String getCurrentYearEnd() {
Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
String years = dateFormat.format(date);
return years + "-12-31";
}
// 获得上年第一天的日期 *
public static String getPreviousYearFirst() {
Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
String years = dateFormat.format(date);
int years_value = Integer.parseInt(years);
years_value--;
return years_value + "-1-1";
}
// 获得上年最后一天的日期
public static String getPreviousYearEnd() {
weeks--;
int yearPlus = getYearPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks + (MaxYear - 1));
Date yearDay = currentDate.getTime();
DateFormat df = DateFormat.getDateInstance();
String preYearDay = df.format(yearDay);
getThisSeasonTime(11);
return preYearDay;
}
// 获得本季度
public static String getThisSeasonTime(int month) {
int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
int season = 1;
if (month >= 1 && month <= 3) {
season = 1;
}
if (month >= 4 && month <= 6) {
season = 2;
}
if (month >= 7 && month <= 9) {
season = 3;
}
if (month >= 10 && month <= 12) {
season = 4;
}
int start_month = array[season - 1][0];
int end_month = array[season - 1][2];
Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
String years = dateFormat.format(date);
int years_value = Integer.parseInt(years);
int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
int end_days = getLastDayOfMonth(years_value, end_month);
String seasonDate = years_value + "-" + start_month + "-" + start_days + ";" + years_value + "-" + end_month + "-" + end_days;
return seasonDate;
}
/**
* 获取某年某月的最后一天
*
* @param year 年
* @param month 月
* @return 最后一天
*/
public static int getLastDayOfMonth(int year, int month) {
if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
return 31;
}
if (month == 4 || month == 6 || month == 9 || month == 11) {
return 30;
}
if (month == 2) {
if (isLeapYear(year)) {
return 29;
} else {
return 28;
}
}
return 0;
}
/**
* 是否闰年
*
* @param year 年
* @return
*/
public static boolean isLeapYear(int year) {
return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}
}
https://www.iteye.com/blog/qiaolevip-1633117
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