import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import org.apache.commons.lang.StringUtils;
/**
* 日期工具类
*
* @author yugc
*/
public final class DateUtil {
private DateUtil() {
}
/**
* yyyy-MM-dd
*/
public static final String FORMAT1 = "yyyy-MM-dd";
/**
* yyyy.MM.dd
*/
public static final String FORMAT2 = "yyyy.MM.dd";
/**
* yyyy/MM/dd
*/
public static final String FORMAT3 = "yyyy/MM/dd";
/**
* yyyy-MM-dd HH:mm
*/
public static final String FORMAT4 = "yyyy-MM-dd HH:mm";
/**
* yyyy.MM.dd HH:mm
*/
public static final String FORMAT5 = "yyyy.MM.dd HH:mm";
/**
* yyyy/MM/dd HH:mm
*/
public static final String FORMAT6 = "yyyy/MM/dd HH:mm";
/**
* yyyy-MM-dd HH:mm:ss
*/
public static final String FORMAT7 = "yyyy-MM-dd HH:mm:ss";
/**
* YYYY-MM-dd HH-mm-ss
*/
public static final String FORMAT15 = "YYYY-MM-dd HH-mm-ss";
/**
* yyyy.MM.dd HH:mm:ss
*/
public static final String FORMAT8 = "yyyy.MM.dd HH:mm:ss";
/**
* yyyy/MM/dd HH:mm:ss
*/
public static final String FORMAT9 = "yyyy/MM/dd HH:mm:ss";
/**
* yyyy_MM_dd_HH_mm_ss
*/
public static final String FORMAT10 = "yyyy_MM_dd_HH_mm_ss";
/**
* yy-MM-dd
*/
public static final String FORMAT11 = "yy-MM-dd";
/**
* yyyyMMdd
*/
public static final String FORMAT12 = "yyyyMMdd";
/**
* yyyyMMddHHmmss
*/
public static final String FORMAT13 = "yyyyMMddHHmmss";
/**
* yyyyMM
*/
public static final String FORMAT14 = "yyyyMM";
public static Date getCurrentDate() {
return new Date(System.currentTimeMillis());
}
public static Date getYesterDay() {
return addDay(new Date(System.currentTimeMillis()), -1);
}
public static String getYesterDayString() {
return parseDateToString(addDay(new Date(System.currentTimeMillis()), -1), FORMAT1);
}
/**
* 得到年月日的路径
* @return
*/
public static String getThisYearMonthDay(String dateString) {
Date date = parseStringToDate(dateString, FORMAT12);
return DateUtil.getYear(date) + "/" + DateUtil.getMonth(date) + "/" + DateUtil.getDay(date) + "/";
}
/**
* 返回当前日期或时间
*
* @param format
* @return
*/
public static String getCurrentDate(String format) {
if (StringUtils.isBlank(format)) {
format = FORMAT1;
}
Date date = new Date();
SimpleDateFormat formatter = new SimpleDateFormat(format);
String currentTime = formatter.format(date);
return currentTime;
}
/**
* 返回当前时间
*
* @return
*/
public static String getCurrentTime() {
String datetime = getCurrentDate(FORMAT7);
String time = datetime.substring(datetime.indexOf(" ") + 1);
return time;
}
/**
* 返回当前时间加随机数
*
* @return
*/
public static String getCurrentDateTimeRandom() {
String datetime = getCurrentDate(DateUtil.FORMAT10) + "_" + Math.random();
return datetime;
}
/**
* 返回当前时间和日期
* @return
*/
public static String getCurrentDateTimeString() {
return getCurrentDate(DateUtil.FORMAT7);
}
/**
* 返回当前日期
*
* @return
*/
public static Date getCurrentDateTime() {
String datetime = getCurrentDate(FORMAT7);
return parseStringToDate(datetime, "");
}
public static Timestamp getCurrentTimestamp() {
String datetime = getCurrentDate(FORMAT7);
return parseStringToTimestamp(datetime, "");
}
public static Timestamp getCurrentTimestamp(String format) {
String datetime = getCurrentDate(format);
return parseStringToTimestamp(datetime, "");
}
/**
* 日期转换为字符串
*
* @param date 日期
* @param format 格式
* @return 返回字符型日期
*/
public static String parseDateToString(Date date, String format) {
String result = "";
DateFormat formatter = null;
try {
if (date != null) {
if (StringUtils.isBlank(format)) {
formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
}
else {
formatter = new SimpleDateFormat(format);
}
result = formatter.format(date);
}
}
catch (Exception e) {
}
return result;
}
/**
* 时间1-时间2的毫秒
*
* @param t1
* @param t2
* @return
*/
public static long between(Timestamp t1, Timestamp t2) {
if ((t1 != null) && (t2 != null)) {
return t1.getTime() - t2.getTime();
}
return 0;
}
/**
* 两个日期date1-date2相减，相差的天数
*
* @param date1
* 日期
* @param date2
* 日期
* @return 返回相减后的日期
*/
public static int betweenTwoDates(Date date1, Date date2) {
return (int) ((getMillis(date1) - getMillis(date2)) / (24 * 3600 * 1000));
}
/**
* 将字符串转换为日期
*
* @param str
* @return
* @throws ParseException
*/
public static Date parseStringToDate(String str, String format) {
DateFormat formatter = null;
Date date = null;
if (StringUtils.isNotBlank(str)) {
if (StringUtils.isBlank(format)) {
formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
}
else {
formatter = new SimpleDateFormat(format);
}
try {
date = formatter.parse(str);
}
catch (ParseException e) {
e.printStackTrace();
}
}
return date;
}
/**
* 返回2007到今年的年份
*
* @return
*/
public static List<Integer> get2007ToThisYear() {
// 当前时间
Calendar c = Calendar.getInstance();
c.setTime(new Date());
// 返回的年份
List<Integer> the2007ToThisYearList = new ArrayList<Integer>();
// 当前年
int thisYear = c.get(Calendar.YEAR);
for (int i = thisYear; i >= 2007; i--) {
the2007ToThisYearList.add(i);
}
return the2007ToThisYearList;
}
/**
* 获取当前月的前几个月份的时间
* @param months
* @return
*/
public static Date getDateBeforeMonths(int months) {
// 当前时间
Calendar c = Calendar.getInstance();
c.add(Calendar.MONTH, -months);
return c.getTime();
}
/**
* 获取当前日期的前几天的时间
* @param days
* @return
*/
public static Date getDateBeforeDays(int days) {
// 当前时间
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, -days);
return c.getTime();
}
/**
* 返回1-12月份
*
* @return
*/
public static List<String> getAllMonth() {
List<String> theMonthList = new ArrayList<String>();
for (int i = 1; i < 13; i++) {
if (i < 10) {
theMonthList.add("0" + i);
}
else {
theMonthList.add("" + i);
}
}
return theMonthList;
}
/**
* 返回日期中的年份
*
* @param date
* 日期
* @return 返回年份
*/
public static int getYear(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.YEAR);
}
/**
* 返回日期中的月份
*
* @param date
* 日期
* @return 返回月份
*/
public static int getMonth(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.MONTH) + 1;
}
/**
* 返回日期中的日
*
* @param date
* 日期
* @return 返回日
*/
public static int getDay(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.DAY_OF_MONTH);
}
/**
* 返回日期中的小时
*
* @param date
* 日期
* @return 返回小时
*/
public static int getHour(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.HOUR_OF_DAY);
}
/**
* 返回日期中的分钟
*
* @param date
* 日期
* @return 返回分钟
*/
public static int getMinute(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.MINUTE);
}
/**
* 返回日期中的秒钟
*
* @param date
* 日期
* @return 返回秒钟
*/
public static int getSecond(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.SECOND);
}
/**
* 返回日期代表的毫秒
*
* @param date
* 日期
* @return 返回毫秒
*/
public static long getMillis(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.getTimeInMillis();
}
/**
* 返回当前日期代表的毫秒
*
* @return
*/
public static long getCurrentTimeMillis() {
return System.currentTimeMillis();
}
public static Date addMonth(Date date, int month) {
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(c.MONTH, month);
return c.getTime();
}
/**
* 日期加天数,可以向前加，向后加
*
* @param date
* 日期
* @param day
* 天数
* @return 返回相加后的日期
*/
public static Date addDay(Date date, int day) {
Calendar c = Calendar.getInstance();
c.setTimeInMillis(getMillis(date) + ((long) day) * 24 * 3600 * 1000);
return c.getTime();
}
/**
* 日期加秒数,可以向前加，向后加
*
* @param date
* 日期
* @param second
* 秒数
* @return 返回相加后的日期
*/
public static Date addSecond(Date date, long second) {
Calendar c = Calendar.getInstance();
c.setTimeInMillis(getMillis(date) + second * 1000);
return c.getTime();
}
/**
* 根据一个日期，返回是星期几
*
* @param sdate
* @return
*/
public static String getWeekByDate(String sdate) {
// 再转换为时间
Date date = parseStringToDate(sdate, "");
Calendar c = Calendar.getInstance();
c.setTime(date);
int day = c.get(Calendar.DAY_OF_WEEK);
// day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 day + "";
}
/**
* 根据一个日期，返回是星期几
* 1=星期日 7=星期六，其他类推
*
* @param sdate
* @return
*/
public static int getWeekByDate(Date date) {
// 再转换为时间
Calendar c = Calendar.getInstance();
c.setTime(date);
// day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 c.get(Calendar.DAY_OF_WEEK);
}
/**
* 日期为一年中的第几周
* @return
*/
public static String getWeekNum(Date date) {
Calendar c = Calendar.getInstance(Locale.CHINA);
c.setTime(date);
String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR));
return week;
}
public static java.sql.Date parseUtilDateToSqlDate(Date date) {
if (date != null) {
return new java.sql.Date(date.getTime());
}
else {
return null;
}
}
public static java.sql.Date parseStringToSqlDate(String dateStr, String format) {
Date date = null;
if (StringUtils.isBlank(format)) {
date = parseStringToDate(dateStr, "yyyy-MM-dd HH:mm:ss");
}
else {
date = parseStringToDate(dateStr, format);
}
return parseUtilDateToSqlDate(date);
}
public static Timestamp parseUtilDateToTimestamp(Date date, String format) {
return parseStringToTimestamp(parseDateToString(date, format), format);
}
public static Date parseTimestampToUtilDate(Timestamp date, String format) {
return parseStringToDate(parseDateToString(date, format), format);
}
public static Timestamp parseStringToTimestamp(String dateStr, String format) {
if (StringUtils.isBlank(dateStr)) {
return null;
}
Date date = null;
if (StringUtils.isBlank(format)) {
date = parseStringToDate(dateStr, "yyyy-MM-dd HH:mm:ss");
}
else {
date = parseStringToDate(dateStr, format);
}
if (date != null) {
long t = date.getTime();
return new Timestamp(t);
}
else {
return null;
}
}
/**
* 获取时间2099-12-31，23:59:59
*
* @return
*/
public static Timestamp getMaxTimestamp() {
return DateUtil.parseStringToTimestamp("2099-12-31 23:59:59", DateUtil.FORMAT7);
}
/**
* 返回日期中的年月日，格式化成yyyyMMdd
* @param date
* @return
*/
public static String getYearMonthDay(Date date) {
SimpleDateFormat formatter = new SimpleDateFormat(FORMAT12);
String currentTime = formatter.format(date);
return currentTime;
}
/**
* 取得指定月份的第一天
*
* @param strdate String
* @return String
*/
public static String getMonthBegin(String strdate) {
return parseDateToString(parseStringToDate(strdate, "yyyy-MM"), "");
}
/**
* 取得指定月份的最后一天
*
* @param strdate String
* @return String
*/
public static String getMonthEnd(String strdate) {
Date date = parseStringToDate(getMonthBegin(strdate), "");
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MONTH, 1);
calendar.add(Calendar.DAY_OF_YEAR, -1);
return parseDateToString(calendar.getTime(), "");
}
public static String getPreviousMonthBegin() {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1);
Date date = new Date(cal.getTimeInMillis());
return parseDateToString(parseStringToDate(parseDateToString(date, FORMAT1), "yyyy-MM"), FORMAT1);
}
public static String getPreviousMonthEnd() {
Date date = parseStringToDate(getPreviousMonthBegin(), FORMAT1);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MONTH, 1);
calendar.add(Calendar.DAY_OF_YEAR, -1);
return parseDateToString(calendar.getTime(), FORMAT1);
}
/**
* 上个月
*
* @return
*/
public static String getPreviousMonth() {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1);
Date date = new Date(cal.getTimeInMillis());
return parseDateToString(parseStringToDate(parseDateToString(date, FORMAT1), "yyyy-MM"), FORMAT14);
}
/**
* 上两个月
*
* @return
*/
public static String getPreviousTwoMonth() {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 2);
Date date = new Date(cal.getTimeInMillis());
return parseDateToString(parseStringToDate(parseDateToString(date, FORMAT1), "yyyy-MM"), FORMAT14);
}
/**
* 判断两个日期是否在同一周
* @param date1
* @param date2
* @return
*/
public static boolean isSameWeekDates(Date date1, Date date2) {
Calendar cal1 = Calendar.getInstance();
Calendar cal2 = Calendar.getInstance();
cal1.setTime(date1);
cal2.setTime(date2);
int subYear = cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR);
if (0 == subYear) {
if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) {
return true;
}
}
else if ((1 == subYear) && (11 == cal2.get(Calendar.MONTH))) {
// 如果12月的最后一周横跨来年第一周的话则最后一周即算做来年的第一周
if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) {
return true;
}
}
else if ((-1 == subYear) && (11 == cal1.get(Calendar.MONTH))) {
if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) {
return true;
}
}
return false;
}
public static void main(String[] args) {
System.out.println(getPreviousMonthBegin());
System.out.println(getPreviousMonthEnd());
System.out.println(getYearMonthDay(new Date()));
System.out.println(getYearMonthDay(parseStringToDate("2009-11-2 12:1:21", FORMAT7)));
System.out.println("current time: " + getCurrentDateTime());
System.out.println("addsecond: " + addSecond(getCurrentDateTime(), -1L));
Date date = new Date();
System.out.println("current date: " + date.toString());
System.out.println("test parseDateToString: " + parseDateToString(date, ""));
System.out.println("test parseStringToDate: " + parseStringToDate("1990-01-1 00:00:00", ""));
System.out.println("test getYear: " + getYear(date));
System.out.println("test getMonth: " + getMonth(date));
System.out.println("test getDay: " + getDay(date));
System.out.println("test getHour: " + getHour(date));
System.out.println("test getMinute: " + getMinute(date));
System.out.println("test getSecond: " + getSecond(date));
System.out.println("test getMillis: " + getMillis(date));
System.out.println("test addDate: " + addDay(date, 2));
System.out.println("test betweenTwoDays: " + betweenTwoDates(date, addDay(date, 2)));
System.out.println("test getWeekNum: " + getWeekNum(addDay(date, -2)));
System.out.println("test getWeekByDate: " + getWeekByDate(parseDateToString(date, "")));
System.out.println("test getMonthBegin: " + getMonthBegin(parseDateToString(date, "")));
System.out.println("test getMonthEnd: " + getMonthEnd(parseDateToString(date, "")));
System.out.println("test isSameWeekDates: " + isSameWeekDates(date, addDay(date, -2)));
System.out.println(getPreviousTwoMonth());
System.out.println(getPreviousMonth());
List<Integer> yearList = get2007ToThisYear();
List<String> monthList = getAllMonth();
}
public static String addOneDay(String stopTime) {
String finishTime = stopTime;
Date finishDate = null;
if(stopTime != null && !"".equals(stopTime))
{
if(stopTime.length() < 19)
{
finishTime = stopTime.substring(0, 10) + " 00:00:00";
}
finishDate = DateUtil.parseStringToDate(finishTime, DateUtil.FORMAT7);
finishDate = DateUtil.addDay(finishDate, 1);
return DateUtil.parseDateToString(finishDate, DateUtil.FORMAT7);
}else{
return null;
}
}
/**
* 给date加1天
* @param date
* @return
*/
public static Date addOneDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DATE, 1);
return calendar.getTime();
}
}
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/tech/pnotes/10214.html