import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import java.util.regex.Pattern;
public class DateUtils {
// 格式:年-月-日 小時:分鐘:秒
public static final String FORMAT_ONE = "yyyy-MM-dd HH:mm:ss";
//到毫秒
public static final String FORMAT_SSS = "yyyy-MM-dd HH:mm:ss:SSS";
// 格式:年-月-日 小時:分鐘
public static final String FORMAT_TWO = "yyyy-MM-dd HH:mm";
// 格式:年月日 小時分鐘秒
public static final String FORMAT_THREE = "yyyyMMdd-HHmmss";
// 格式:年-月-日 小時:分鐘:秒
public static final String FORMAT_FOUR = "yyyyMMddHHmmss";
// 格式:年-月-日
public static final String LONG_DATE_FORMAT = "yyyy-MM-dd";
// 格式:月-日
public static final String SHORT_DATE_FORMAT = "MM-dd";
// 格式:小時:分鐘:秒
public static final String LONG_TIME_FORMAT = "HH:mm:ss";
//格式:年-月
public static final String MONTG_DATE_FORMAT = "yyyy-MM";
// 年的加減
public static final int SUB_YEAR = Calendar.YEAR;
// 月加減
public static final int SUB_MONTH = Calendar.MONTH;
// 天的加減
public static final int SUB_DAY = Calendar.DATE;
// 小時的加減
public static final int SUB_HOUR = Calendar.HOUR;
// 分鐘的加減
public static final int SUB_MINUTE = Calendar.MINUTE;
// 秒的加減
public static final int SUB_SECOND = Calendar.SECOND;
static final String dayNames[] = {"星期日", "星期一", "星期二", "星期三", "星期四",
"星期五", "星期六"};
private DateTools() {
}
/**
* 把符合日期格式的字符串轉換爲日期類型
*/
public static Date stringtoDate(String dateStr, String format) {
Date d = null;
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
formater.setLenient(false);
d = formater.parse(dateStr);
} catch (Exception e) {
d = null;
}
return d;
}
/**
* 把符合日期格式的字符串轉換爲日期類型
*/
public static Date stringtoDate(String dateStr, String format,
ParsePosition pos) {
Date d = null;
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
formater.setLenient(false);
d = formater.parse(dateStr, pos);
} catch (Exception e) {
d = null;
}
return d;
}
/**
* 把日期轉換爲字符串
*/
public static String dateToString(Date date, String format) {
String result = "";
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
result = formater.format(date);
} catch (Exception e) {
}
return result;
}
/**
* 獲取當前時間的指定格式
*/
public static String getCurrDate(String format) {
return dateToString(new Date(), format);
}
/**
* 獲得昨天的指定格式
*
* @return
*/
public static String getYesterDay(String format) {
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, -1);
return new SimpleDateFormat(format).format(c.getTime());
}
/**
* 獲得昨天的開始時間
*
* @return
*/
public static Date getYesterDayStartTime() {
Calendar c = getYesterDayInstance();
String yesterdayStart = new SimpleDateFormat("yyyy-MM-dd 00:00:00").format(c.getTime());
return stringtoDate(yesterdayStart, FORMAT_ONE);
}
/**
* 獲得昨天的結束時間
*
* @return
*/
public static Date getYesterDayEndTime() {
Calendar c = getYesterDayInstance();
String yesterdayEnd = new SimpleDateFormat("yyyy-MM-dd 23:59:59").format(c.getTime());
return stringtoDate(yesterdayEnd, FORMAT_ONE);
}
/**
* 日期計算返回String
*
* @param dateKind 類型(SUB_DAY...)
* @param dateStr 日期
* @param amount 增量
* @return
*/
public static String dateSub(int dateKind, String dateStr, int amount) {
Date date = stringtoDate(dateStr, FORMAT_ONE);
return dateSub(dateKind, date, amount, FORMAT_ONE);
}
/**
* 日期計算返回String
*
* @param dateKind 類型(SUB_DAY...)
* @param date 日期
* @param amount 增量
* @return
*/
public static String dateSub(int dateKind, Date date, int amount) {
return dateSub(dateKind, date, amount, FORMAT_ONE);
}
/**
* 日期計算返回String
*
* @param dateKind 類型(SUB_DAY...)
* @param date 日期
* @param amount 增量
* @param format 返回格式
* @return
*/
public static String dateSub(int dateKind, Date date, int amount, String format) {
return dateToString(dateSubToDate(dateKind, date, amount), format);
}
/**
* 日期計算返回Date
*
* @param dateKind
* @param date 日期
* @param amount 增量
* @return
*/
public static Date dateSubToDate(int dateKind, Date date, int amount) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(dateKind, amount);
return calendar.getTime();
}
/**
* 兩個日期相減
*
* @return 相減得到的秒數
*/
public static long timeSub(String firstTime, String secTime) {
Date firstDate = stringtoDate(firstTime, FORMAT_ONE);
Date secondDate = stringtoDate(secTime, FORMAT_ONE);
if(firstDate == null || secondDate == null) {
return -1l;
}
long first = firstDate.getTime();
long second = secondDate.getTime();
return (second - first) / 1000;
}
/**
* 獲得某月的天數
*/
public static int getDaysOfMonth(String year, String month) {
int days = 0;
if (month.equals("1") || month.equals("3") || month.equals("5")
|| month.equals("7") || month.equals("8") || month.equals("10")
|| month.equals("12")) {
days = 31;
} else if (month.equals("4") || month.equals("6") || month.equals("9")
|| month.equals("11")) {
days = 30;
} else {
if ((Integer.parseInt(year) % 4 == 0 && Integer.parseInt(year) % 100 != 0)
|| Integer.parseInt(year) % 400 == 0) {
days = 29;
} else {
days = 28;
}
}
return days;
}
/**
* 獲取某年某月的天數
*/
public static int getDaysOfMonth(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1);
return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
}
/**
* 獲得當前日期
*/
public static int getToday() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.DATE);
}
/**
* 獲得當前月份
*/
public static int getToMonth() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 獲得當前年份
*/
public static int getToYear() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.YEAR);
}
/**
* 返回日期的天
*/
public static int getDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.DATE);
}
/**
* 返回日期的年
*/
public static int getYear(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.YEAR);
}
/**
* 返回日期的月份,1-12
*/
public static int getMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 計算兩個日期相差的天數,如果date2 > date1 返回正數,否則返回負數
*/
public static long dayDiff(Date date1, Date date2) {
return (date2.getTime() - date1.getTime()) / 86400000;
}
/**
* 比較兩個日期的年差
*/
public static int yearDiff(String before, String after) {
Date beforeDay = stringtoDate(before, LONG_DATE_FORMAT);
Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);
return getYear(afterDay) - getYear(beforeDay);
}
/**
* 比較指定日期與當前日期的差
*/
public static int yearDiffCurr(String after) {
Date beforeDay = new Date();
Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);
return getYear(beforeDay) - getYear(afterDay);
}
/**
* 比較指定日期與當前日期的差long數據類型
*/
public static long timeDiffCurr(long after) {
return (new Date().getTime()) - after;
}
/**
* 獲取每月的第一週
*/
public static int getFirstWeekdayOfMonth(int year, int month) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天爲第一天
c.set(year, month - 1, 1);
return c.get(Calendar.DAY_OF_WEEK);
}
/**
* 獲取每月的最後一週
*/
public static int getLastWeekdayOfMonth(int year, int month) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天爲第一天
c.set(year, month - 1, getDaysOfMonth(year, month));
return c.get(Calendar.DAY_OF_WEEK);
}
/**
* 獲取當週內第一天的日期
*
* @param date
* @return
*/
public static Date getFirstWeekdayOfWeek(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
int dayOfWeek = c.get(Calendar.DAY_OF_WEEK) - 1;
if (dayOfWeek == 0) {
dayOfWeek = 7;
}
return dateSubToDate(DateTools.SUB_DAY, date, -(dayOfWeek - 1));
}
public static Date getLastWeekdayOfWeek(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
int dayOfWeek = c.get(Calendar.DAY_OF_WEEK) - 1;
if (dayOfWeek == 0) {
dayOfWeek = 7;
}
return dateSubToDate(DateTools.SUB_DAY, date, (7 - dayOfWeek));
}
/**
* unix時間戳轉換北京當前時間
* @param unixtimestamp unix時間戳
* @return 時間格式yyyy-MM-dd HH:mm:ss
*/
public static Date unixtimestampToDate(String unixtimestamp){
String res;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
long lt = new Long(unixtimestamp)*1000;
return new Date(lt);
}
/**
* 獲得當前日期字符串,格式"yyyy-MM-dd HH:mm:ss"
*
* @return
*/
public static String getNow() {
Calendar today = Calendar.getInstance();
return dateToString(today.getTime(), FORMAT_ONE);
}
/**
* 判斷日期是否有效,包括閏年的情況
*
* @param date YYYY-mm-dd
* @return
*/
public static boolean isDate(String date) {
StringBuffer reg = new StringBuffer(
"^((\\d{2}(([02468][048])|([13579][26]))-?((((0?");
reg.append("[13578])|(1[02]))-?((0?[1-9])|([1-2][0-9])|(3[01])))");
reg.append("|(((0?[469])|(11))-?((0?[1-9])|([1-2][0-9])|(30)))|");
reg.append("(0?2-?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][12");
reg.append("35679])|([13579][01345789]))-?((((0?[13578])|(1[02]))");
reg.append("-?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))");
reg.append("-?((0?[1-9])|([1-2][0-9])|(30)))|(0?2-?((0?[");
reg.append("1-9])|(1[0-9])|(2[0-8]))))))");
Pattern p = Pattern.compile(reg.toString());
return p.matcher(date).matches();
}
/**
* 把毫秒轉化成日期
*
* @param dateFormat(日期格式,例如:MM/ dd/yyyy HH:mm:ss)
* @param millSec(毫秒數)
* @return
*/
public static String longToDate(String dateFormat, Long millSec) {
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
Date date = new Date(millSec);
return sdf.format(date);
}
/**
* 比較兩Date相差幾天、幾周、幾月、幾年
*
* @param fDate
* @param oDate
* @param type
* @return
*/
public static int daysOfTwo(Date fDate, Date oDate, int type) {
long timeLong = 0;
int dayNum = 0;
switch (type) {
case Calendar.HOUR:
timeLong = oDate.getTime() - fDate.getTime();
dayNum = (int) ((timeLong / 1000) / 3600);
return dayNum;
case Calendar.DAY_OF_YEAR:
timeLong = oDate.getTime() - fDate.getTime();
dayNum = (int) (((timeLong / 1000) / 3600) / 24);
return dayNum;
case Calendar.WEEK_OF_YEAR:
timeLong = oDate.getTime() - fDate.getTime();
dayNum = (int) (((timeLong / 1000) / 3600) / 24 / 7);
return dayNum;
case Calendar.MONTH:
timeLong = oDate.getTime() - fDate.getTime();
dayNum = (int) (((timeLong / 1000) / 3600) / 24 / 31);
return dayNum;
case Calendar.YEAR:
timeLong = oDate.getTime() - fDate.getTime();
dayNum = (int) (((timeLong / 1000) / 3600) / 24 / 360);
return dayNum;
}
return 0;
}
/**
* 獲取UTC時間 格式:YYYY-MM-DDThh:mm:ssZ
*
* @param date
* @return
*/
public static String getSolrDate(Date date) {
SimpleDateFormat sdf1 = new SimpleDateFormat(LONG_DATE_FORMAT);
SimpleDateFormat sdf2 = new SimpleDateFormat(LONG_TIME_FORMAT);
String result = sdf1.format(date) + "T" + sdf2.format(date) + "Z";
return result;
}
private static Calendar getYesterDayInstance() {
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, -1);
return c;
}
/**
* local時間轉換成UTC時間
* @return
*/
public static String localToUTC() {
Date localDate = new Date();
long localTimeInMillis = localDate.getTime();
/** long時間轉換成Calendar */
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(localTimeInMillis);
/** 取得時間偏移量 */
int zoneOffset = calendar.get(java.util.Calendar.ZONE_OFFSET);
/** 取得夏令時差 */
int dstOffset = calendar.get(java.util.Calendar.DST_OFFSET);
/** 從本地時間裏扣除這些差量,即可以取得UTC時間*/
calendar.add(java.util.Calendar.MILLISECOND, -(zoneOffset + dstOffset));
/** 取得的時間就是UTC標準時間 */
Date utcDate = new Date(calendar.getTimeInMillis());
return getSolrDate(utcDate);
}
/**
* utc時間轉成local時間
* @param utcTime
* @return
*/
public static Date utcToLocal(String utcTime) {
SimpleDateFormat sdf = new SimpleDateFormat(FORMAT_ONE);
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
Date utcDate = null;
try {
utcDate = sdf.parse(utcTime);
} catch (ParseException e) {
e.printStackTrace();
}
sdf.setTimeZone(TimeZone.getDefault());
Date locatlDate = null;
String localTime = sdf.format(utcDate.getTime());
try {
locatlDate = sdf.parse(localTime);
} catch (ParseException e) {
e.printStackTrace();
}
return locatlDate;
}
}