* 获取日期之间相差的月份
* @param @param d1
* @param @param d2
* @param @return
* @return int
* @author fw
* @Time 2017-10-17 下午2:07:32
*/
public int getMonthDiff(Date d1, Date d2) {
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(d1);
c2.setTime(d2);
if(c1.getTimeInMillis() < c2.getTimeInMillis()) return 0;
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);
// 获取年的差值 假设 d1 = 2015-8-16 d2 = 2011-9-30
int yearInterval = year1 - year2;
// 如果 d1的 月-日 小于 d2的 月-日 那么 yearInterval-- 这样就得到了相差的年数
if(month1 < month2 || month1 == month2 && day1 < day2) yearInterval --;
// 获取月数差值
int monthInterval = (month1 + 12) - month2 ;
if(day1 < day2) monthInterval --;
monthInterval %= 12;
return yearInterval * 12 + monthInterval;
}
/**
*
* date1和date2相差的天数
* @param date1
* @param date2
* @return date1和date2相差的天数
* fw
*/
public int getDiffertDay(Date date1, Date date2) {
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
int day1 = cal1.get(Calendar.DAY_OF_YEAR);
int day2 = cal2.get(Calendar.DAY_OF_YEAR);
int year1 = cal1.get(Calendar.YEAR);
int year2 = cal2.get(Calendar.YEAR);
if (year1 != year2) {
// 同一年
int timeDistance = 0;
for (int i = year1; i < year2; i++) {
if (i % 4 == 0 && i % 100 != 0 || i % 400 == 0) {
// 闰年
timeDistance += 366;
// 不是闰年
} else {
timeDistance += 365;
}
}
return timeDistance + (day2 - day1);
} else {
// 不同年
System.out.println("判断day2 - day1 : " + (day2 - day1));
return day2 - day1;
}
}
--------------------------------------------------------
// 用来全局控制 上一周，本周，下一周的周数变化
private int weeks = 0;
private int MaxDate;// 一月最大天数
private int MaxYear;// 一年最大天数
private static Calendar calendar = Calendar.getInstance();//实例化日历(current time)
private static String defaultFormat = "yyyy-MM-dd";
private static String[] timeFormats = {"hh:mm a","hh:mm:ss a","HH:mm","HH:mm:ss"};
private static String[] dateFormats = {"yyyy-MM-dd","MM/dd/yyyy"};
private static String[] datatimeFormats = {"yyyy-MM-dd HH:mm:ss","MM/dd/yyyy hh:mm:ss a"};
/**
* 获得指定日期的星期
* @param date
* @return
*/
public static int getDayOfWeek(Date date){
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int index = calendar.get(Calendar.DAY_OF_WEEK);
return index;
}
/**
* 获得当前年份
*
* @return
*/
public static int getYear() {
return calendar.get(Calendar.YEAR);
}
/**
* 获得当前月份
*
* @return
*/
public static int getMonth() {
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 获得今天在本年的第几天
*
* @return
*/
public static int getDayOfYear() {
return calendar.get(Calendar.DAY_OF_YEAR);
}
/**
* 获得今天在本月的第几天(获得当前日)
*
* @return
*/
public static int getDayOfMonth() {
return calendar.get(Calendar.DAY_OF_MONTH);
}
/**
* 获得今天在本周的第几天
*
* @return
*/
public static int getDayOfWeek() {
return calendar.get(Calendar.DAY_OF_WEEK);
}
/**
* 获得今天是这个月的第几周
*
* @return
*/
public static int getWeekOfMonth() {
return calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH);
}
/**
* 获得半年后的日期
*
* @return
*/
public static Date getTimeYearNext() {
calendar.add(Calendar.DAY_OF_YEAR, 183);
return calendar.getTime();
}
public static Date stringToDate(String dateString){
for (String format : dateFormats){
try{
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format, Locale.ENGLISH);
return simpleDateFormat.parse(dateString);
}catch (Exception e){
e.printStackTrace();
continue;
}
}
return null;
}
public static Date stringToDate(String dateString, String formatString) throws java.text.ParseException{
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formatString, Locale.ENGLISH);
try {
return simpleDateFormat.parse(dateString);
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}
public static Date stringToTime(String timeString){
for (String format : timeFormats){
try{
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format, Locale.ENGLISH);
return simpleDateFormat.parse(timeString);
}catch (Exception e){
e.printStackTrace();
continue;
}
}
return null;
}
public static Date stringToTime(String timeString, String formatString) throws java.text.ParseException{
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formatString, Locale.ENGLISH);
try {
return simpleDateFormat.parse(timeString);
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}
public static String dateToString(Date dateTime,String format){
SimpleDateFormat df=new SimpleDateFormat(format);
return df.format(dateTime);
}
/**
* 得到二个日期间的间隔天数
*/
public static String getTwoDay(String sj1, String sj2) {
SimpleDateFormat myFormatter = new SimpleDateFormat(defaultFormat);
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 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 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 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 String getCurrentWeekday() {
weeks = 0;
int mondayPlus = this.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 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
private 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 String getMondayOFWeek() {
weeks = 0;
int mondayPlus = this.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 String getSaturday() {
int mondayPlus = this.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 String getPreviousWeekSunday() {
weeks = 0;
weeks--;
int mondayPlus = this.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 String getPreviousWeekday() {
weeks--;
int mondayPlus = this.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 String getNextMonday() {
weeks++;
int mondayPlus = this.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 String getNextSunday() {
int mondayPlus = this.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;
}
private 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 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 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 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 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 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
private 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;
}
private 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 String getCurrentYearFirst() {
int yearPlus = this.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 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 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 String getPreviousYearEnd() {
weeks--;
int yearPlus = this.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);
return preYearDay;
}
/***
*
*获取所在月的第一天日期
* @throws java.text.ParseException
* */
public static String getFirstDayOfMonth(String date) throws java.text.ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
calendar.setTime(sdf.parse(date));
calendar.set(Calendar.DATE, 1);
} catch (ParseException e) {
e.printStackTrace();
}
return sdf.format(calendar.getTime());
}
/***
* 获取所在月的最后一天时间
* @throws java.text.ParseException
*
* */
public static String getLastDayOfMonth(String date) throws java.text.ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
calendar.setTime(sdf.parse(date));
calendar.set(Calendar.DATE, 1);// 设为当前月的1号
calendar.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
calendar.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
} catch (ParseException e) {
e.printStackTrace();
}
return sdf.format(calendar.getTime());
}
/***
*
* 上月第一天
* @throws java.text.ParseException
*
* */
public static String getPreviousMonthFirst(String date) throws java.text.ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
calendar.setTime(sdf.parse(date));
calendar.set(Calendar.DATE, 1);// 设为当前月的1号
calendar.add(Calendar.MONTH, -1);// 减一个月，变为下月的1号
} catch (ParseException e) {
e.printStackTrace();
}
return sdf.format(calendar.getTime());
}
/***
*
* 上月最后一天
* @throws java.text.ParseException
*
* */
public static String getPreviousMonthEnd(String date) throws java.text.ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
calendar.setTime(sdf.parse(date));
calendar.add(Calendar.MONTH, -1);// 减一个月
calendar.set(Calendar.DATE, 1);// 把日期设置为当月第一天
calendar.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
} catch (ParseException e) {
e.printStackTrace();
}
return sdf.format(calendar.getTime());
}
/***
* 获取所在年的第一天
* @throws java.text.ParseException
*
* **/
public static String getFirstDayOfYear(String date) throws java.text.ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
calendar.setTime(sdf.parse(date));
calendar.set(Calendar.DAY_OF_YEAR, 1);
} catch (ParseException e) {
e.printStackTrace();
}
return sdf.format(calendar.getTime());
}
/**
*
* 当前时间去年的日期
* @throws java.text.ParseException
* */
public static String getDayOfLastYear(String date) throws java.text.ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
calendar.setTime(sdf.parse(date));
calendar.add(Calendar.YEAR, -1);
} catch (ParseException e) {
e.printStackTrace();
}
return sdf.format(calendar.getTime());
}
/****
*
* 系统当前时间
* */
public static String getCurrentDate (){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(calendar.getTime());
}
/**
* 得到几天前的时间
* @param d
* @param day
* @return
*/
public static Date getDateBefore(Date d,int day){
Calendar now =Calendar.getInstance();
now.setTime(d);
now.set(Calendar.DATE,now.get(Calendar.DATE)-day);
return now.getTime();
}
/**
* 得到几天后的时间
* @param d
* @param day
* @return
*/
public static Date getDateAfter(Date d,int day){
Calendar now =Calendar.getInstance();
now.setTime(d);
now.set(Calendar.DATE,now.get(Calendar.DATE)+day);
return now.getTime();
}
/**
* 将时间转换为固定格式的字符串
* @param format
* @return
*/
public static String timeToString(Date date, String format) {
try {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
return simpleDateFormat.format(date);
}catch (Exception e){
e.printStackTrace();
return null;
}
}
public static Date stringToDateTime(String dateTimeStr, String format) {
try {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
return simpleDateFormat.parse(dateTimeStr);
}catch (Exception e){
e.printStackTrace();
return null;
}
}