public class DateDistance {
// 获取当前月最后一天
public static Date getMonthLastDay(Date date) {
Calendar cale = Calendar.getInstance();
cale.setTime(date);
cale.set(Calendar.DAY_OF_MONTH, cale.getActualMaximum(Calendar.DAY_OF_MONTH));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date ddd=cale.getTime();
try {
ddd = sdf.parse(sdf.format(cale.getTime()));
} catch (ParseException e) {
return ddd;
}
return ddd;
}
//日期添加i整年
public static Date getNextYear(Date date,int i) {
Calendar cale = Calendar.getInstance();
cale.setTime(date);
cale.set(Calendar.YEAR, i);
return cale.getTime();
}
/**
* 获得本月第一天
*/
public static Date getMonthFirstDay(Date date) {
Calendar cale = Calendar.getInstance();
cale.setTime(date);
cale.set(Calendar.DAY_OF_MONTH, cale.getActualMinimum(Calendar.DAY_OF_MONTH));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date ddd=cale.getTime();
try {
ddd = sdf.parse(sdf.format(cale.getTime()));
} catch (ParseException e) {
return ddd;
}
return ddd;
}
// 按标准每月30日计算 月份；
public static double getMonthCount(Date start_time,Date end_time) {
double count=0;
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(start_time);
c2.setTime(end_time);
int year=c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);
double month= c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH);
double day=c2.get(Calendar.DAY_OF_MONTH) - c1.get(Calendar.DAY_OF_MONTH)+1;
if(day>=0){
count=month+day/c2.getActualMaximum(Calendar.DAY_OF_MONTH);
}else{
day=day+30;
count=month-1+day/30;
}
count +=year*12;
return count;
}
//获取年数据
public static double getYearCount(Date start_time,Date end_time) {
double count=0;
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(start_time);
c2.setTime(end_time);
double month= c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);
double day= c2.get(Calendar.DAY_OF_YEAR) - c1.get(Calendar.DAY_OF_YEAR);
if(day>=0){
count=month+day/30;
}else{
day=day+30;
count=month-1+day/30;
}
return count;
}
/*public static void main(String[] args) throws ParseException {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
String g="2017-10-20";
Date d1=format.parse(g);
System.out.println(DateDistance.getMonthCount(d1, new Date()));
}*/
/**
* 两个时间之间相差距离多少天
*
* @param one
* 时间参数 1：
* @param two
* 时间参数 2：
* @return 相差天数
*/
public static long getDistanceDays(String str1, String str2){
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date one;
Date two;
long days = 0;
try {
one = df.parse(str1);
two = df.parse(str2);
days =getDistanceDays(one, two);
} catch (ParseException e) {
e.printStackTrace();
}
return days;
}
/**
* 两个时间之间相差距离多少天
*
* @param one
* 时间参数 1：
* @param two
* 时间参数 2：
* @return 相差天数
*/
public static long getDistanceDays(Date one, Date two){
long days = 0;
long time1 = one.getTime();
long time2 = two.getTime();
long diff;
if (time1 < time2) {
diff = time2 - time1;
} else {
diff = time1 - time2;
}
days = diff / (1000 * 60 * 60 * 24);
return days;
}
public static long getDistanceDays(Date one, Date two,boolean iszheng){
long days = 0;
long time1 = one.getTime();
long time2 = two.getTime();
long diff = time2-time1;
days = diff / (1000 * 60 * 60 * 24);
return days;
}
/**
* 两个时间相差距离多少天多少小时多少分多少秒
*
* @param str1
* 时间参数 1 格式：1990-01-01 12:00:00
* @param str2
* 时间参数 2 格式：2009-01-01 12:00:00
* @return long[] 返回值为：{天, 时, 分, 秒}
*/
public static long[] getDistanceTimes(String str1, String str2) {
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date one;
Date two;
long day = 0;
long hour = 0;
long min = 0;
long sec = 0;
try {
one = df.parse(str1);
two = df.parse(str2);
long time1 = one.getTime();
long time2 = two.getTime();
long diff;
if (time1 < time2) {
diff = time2 - time1;
} else {
diff = time1 - time2;
}
day = diff / (24 * 60 * 60 * 1000);
hour = (diff / (60 * 60 * 1000) - day * 24);
min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
} catch (ParseException e) {
e.printStackTrace();
}
long[] times = { day, hour, min, sec };
return times;
}
/**
* 两个时间相差距离多少天多少小时多少分多少秒
*
* @param str1
* 时间参数 1 格式：1990-01-01 12:00:00
* @param str2
* 时间参数 2 格式：2009-01-01 12:00:00
* @return String 返回值为：xx天xx小时xx分xx秒
*/
public static String getDistanceTime(String str1, String str2) {
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date one;
Date two;
long day = 0;
long hour = 0;
long min = 0;
long sec = 0;
try {
one = df.parse(str1);
two = df.parse(str2);
long time1 = one.getTime();
long time2 = two.getTime();
long diff;
if (time1 < time2) {
diff = time2 - time1;
} else {
diff = time1 - time2;
}
day = diff / (24 * 60 * 60 * 1000);
hour = (diff / (60 * 60 * 1000) - day * 24);
min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60);
sec = (diff / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
} catch (ParseException e) {
e.printStackTrace();
}
return day + "天" + hour + "小时" + min + "分" + sec + "秒";
}
/**
* 获取两个时间间隔多少月(足月)
*
* @param start
* @param end
* @return
*/
public static int getBetweenMonth(Date start, Date end) {
if (start.after(end)) {
Date t = start;
start = end;
end = t;
}
Calendar startCalendar = Calendar.getInstance();
startCalendar.setTime(start);
Calendar endCalendar = Calendar.getInstance();
endCalendar.setTime(end);
Calendar temp = Calendar.getInstance();
temp.setTime(end);
temp.add(Calendar.DATE, 1);
int year = endCalendar.get(Calendar.YEAR)
- startCalendar.get(Calendar.YEAR);
int month = endCalendar.get(Calendar.MONTH)
- startCalendar.get(Calendar.MONTH);
if ((startCalendar.get(Calendar.DATE) == 1)
&& (temp.get(Calendar.DATE) == 1)) {
return year * 12 + month + 1;
} else if ((startCalendar.get(Calendar.DATE) != 1)
&& (temp.get(Calendar.DATE) == 1)) {
return year * 12 + month;
} else if ((startCalendar.get(Calendar.DATE) == 1)
&& (temp.get(Calendar.DATE) != 1)) {
return year * 12 + month;
} else {
return (year * 12 + month - 1) < 0 ? 0 : (year * 12 + month);
}
}
/**
* 获取两个时间间隔多少月(实际月，不足一月的舍去)
*
* @param start
* @param end
* @return
*/
public static int getBetweenMonth(Date start, Date end,boolean ff) {
if (start.after(end)) {
Date t = start;
start = end;
end = t;
}
Calendar startCalendar = Calendar.getInstance();
startCalendar.setTime(start);
Calendar endCalendar = Calendar.getInstance();
endCalendar.setTime(end);
Calendar temp = Calendar.getInstance();
temp.setTime(end);
temp.add(Calendar.DATE, 1);
int year = endCalendar.get(Calendar.YEAR)
- startCalendar.get(Calendar.YEAR);
int month = endCalendar.get(Calendar.MONTH)
- startCalendar.get(Calendar.MONTH);
if(endCalendar.get(Calendar.DAY_OF_MONTH)-startCalendar.get(Calendar.DAY_OF_MONTH)<0){
month--;
}
if ((startCalendar.get(Calendar.DATE) == 1)
&& (temp.get(Calendar.DATE) == 1)) {
return year * 12 + month + 1;
} else if ((startCalendar.get(Calendar.DATE) != 1)
&& (temp.get(Calendar.DATE) == 1)) {
return year * 12 + month;
} else if ((startCalendar.get(Calendar.DATE) == 1)
&& (temp.get(Calendar.DATE) != 1)) {
return year * 12 + month;
} else {
return (year * 12 + month - 1) < 0 ? 0 : (year * 12 + month);
}
}
/**
* 为当前日期加 day天
* @param today
* @param day
* @return
*/
public static Date getNextDayDateTime(Date today,int day){
Calendar c = Calendar.getInstance();
c.setTime(today);
c.add(Calendar.DAY_OF_MONTH, day);// 今天+day天
return c.getTime();
}
/**
* 为当前日期加month 月 ， day天
* @param today
* @param day
* @return
*/
public static Date getNextDayDateTime(Date today,int month,int day){
Calendar c = Calendar.getInstance();
c.setTime(today);
if(month!=0){
c.add(Calendar.MONTH, month);
}
if(day!=0){
c.add(Calendar.DAY_OF_MONTH, day);// 今天+day天
}
return c.getTime();
}
}java获得当前月的第一天最后一天
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转载自blog.csdn.net/megamind_hl/article/details/80076637
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