日期时间转换及封装工具类
1、其他时间类型转 Date
final Timestamp timestamp = new Timestamp(date.getTime());
final Calendar calendar = Calendar.getInstance();
final Instant instant = Instant.now();
final LocalDateTime localDateTime = LocalDateTime.now();
final ZonedDateTime zonedDateTime = ZonedDateTime.now();
final LocalDate localDate = LocalDate.now();
// Timestamp 转 Date
Date timestampDate = new Date(timestamp.getTime());
// Calendar 转 Date
Date calendarDate = calendar.getTime();
// Instant 转 Date
Date instantDate = Date.from(instant);
// LocalDate 转 Date
Date localDateDate = Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).toInstant());
// LocalDateTime 转 Date
Date localDateTimeDate = Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
// ZonedDateTime 转 Date
Date zonedDateTimeDate = Date.from(zonedDateTime.toInstant());
2、其他时间类型转 Timestamp
final Date date = new Date();
final Calendar calendar = Calendar.getInstance();
final Instant instant = Instant.now();
final LocalDateTime localDateTime = LocalDateTime.now();
final ZonedDateTime zonedDateTime = ZonedDateTime.now();
final LocalDate localDate = LocalDate.now();
// Date 转 Timestamp
Timestamp dateTimestamp = new Timestamp(date.getTime());
// Calendar 转 Timestamp
Timestamp calendarTimestamp = new Timestamp(calendar.getTimeInMillis());
// Instant 转 Timestamp
Timestamp instantTimestamp = Timestamp.from(instant);
// LocalDate 转 Timestamp
Timestamp localDateTimestamp = Timestamp.valueOf(localDate.atStartOfDay());
// LocalDateTime 转 Timestamp
Timestamp localDateTimeTimestamp = Timestamp.valueOf(localDateTime);
// ZonedDateTime 转 Timestamp
Timestamp zonedDateTimeTimestamp = Timestamp.from(zonedDateTime.toInstant());
3、其他时间类型转 Calendar
final Date date = new Date();
final Timestamp timestamp = new Timestamp(date.getTime());
final Instant instant = Instant.now();
final LocalDateTime localDateTime = LocalDateTime.now();
final ZonedDateTime zonedDateTime = ZonedDateTime.now();
final LocalDate localDate = LocalDate.now();
// Date 转 Calendar
Calendar dateCalendar = Calendar.getInstance();
dateCalendar.setTime(date);
// Timestamp 转 Calendar
Calendar timestampCalendar = Calendar.getInstance();
timestampCalendar.setTimeInMillis(timestamp.getTime());
// Instant 转 Calendar
Calendar instantCalendar = GregorianCalendar.from(ZonedDateTime.ofInstant(instant, ZoneId.systemDefault()));
// LocalDate 转 Calendar
Calendar localDateCalendar = GregorianCalendar.from(localDate.atStartOfDay(ZoneId.systemDefault()));
// LocalDateTime 转 Calendar
Calendar localDateTimeCalendar = GregorianCalendar.from(ZonedDateTime.of(localDateTime, ZoneId.systemDefault()));
// ZonedDateTime 转 Calendar
Calendar zonedDateTimeInstantCalendar = GregorianCalendar.from(zonedDateTime);
4、其他时间类型转 Instant
final Date date = new Date();
final Timestamp timestamp = new Timestamp(date.getTime());
final Calendar calendar = Calendar.getInstance();
final LocalDateTime localDateTime = LocalDateTime.now();
final ZonedDateTime zonedDateTime = ZonedDateTime.now();
final LocalDate localDate = LocalDate.now();
// Date 转 Instant
Instant dateInstant = date.toInstant();
// Timestamp 转 Instant
Instant timestampInstant = timestamp.toInstant();
// Calendar 转 Instant
Instant calendarInstant = calendar.toInstant();
// LocalDateTime 转 Instant
Instant localDateTimeInstant = localDateTime.atZone(ZoneId.systemDefault()).toInstant();
// ZonedDateTime 转 Instant
Instant zonedDateTimeInstant = zonedDateTime.toInstant();
// LocalDate 转 Instant
Instant localDateInstant = localDate.atStartOfDay(ZoneId.systemDefault()).toInstant();
5、其他时间类型转 LocalDate
final Date date = new Date();
final Timestamp timestamp = new Timestamp(date.getTime());
final Calendar calendar = Calendar.getInstance();
final Instant instant = Instant.now();
final LocalDateTime localDateTime = LocalDateTime.now();
final ZonedDateTime zonedDateTime = ZonedDateTime.now();
// Date 转 LocalDate (jdk11)
LocalDate dateLocalDate = LocalDate.ofInstant(date.toInstant(), ZoneId.systemDefault());
LocalDate dateLocalDate = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault()).toLocalDate();
// Timestamp 转 LocalDate
LocalDate timestampLocalDate = timestamp.toLocalDateTime().toLocalDate();
// Calendar 转 LocalDate (jdk11)
LocalDate calendarLocalDate = LocalDate.ofInstant(calendar.toInstant(), ZoneOffset.systemDefault());
LocalDate calendarLocalDate = LocalDateTime.ofInstant(calendar.toInstant(), ZoneOffset.systemDefault()).toLocalDate();
// Instant 转 LocalDate (jdk11)
LocalDate instantLocalDate = LocalDate.ofInstant(instant, ZoneId.systemDefault());
LocalDate instantLocalDate = LocalDateTime.ofInstant(instant, ZoneId.systemDefault()).toLocalDate();
// LocalDateTime 转 LocalDate
LocalDate localDateTimeLocalDate = localDateTime.toLocalDate();
// ZonedDateTime 转 LocalDate
LocalDate zonedDateTimeLocalDate = zonedDateTime.toLocalDate();
6、其他时间类型转 LocalDateTime
final Date date = new Date();
final Timestamp timestamp = new Timestamp(date.getTime());
final Calendar calendar = Calendar.getInstance();
final Instant instant = Instant.now();
final ZonedDateTime zonedDateTime = ZonedDateTime.now();
final LocalDate localDate = LocalDate.now();
// Date 转 LocalDateTime
LocalDateTime dateLocalDateTime = LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
LocalDateTime dateLocalDateTime = date.toInstant().atOffset(ZoneId.systemDefault()).toLocalDateTime();
// Timestamp 转 LocalDateTime
LocalDateTime timestampLocalDateTime = timestamp.toLocalDateTime();
// Calendar 转 LocalDateTime
LocalDateTime calendarLocalDateTime = LocalDateTime.ofInstant(calendar.toInstant(), ZoneOffset.systemDefault());
// Instant 转 LocalDateTime
LocalDateTime instantLocalDateTime = LocalDateTime.ofInstant(instant, ZoneId.systemDefault());
// LocalDate 转 LocalDateTime
LocalDateTime localDateLocalDateTime = localDate.atStartOfDay();
LocalDateTime localDateLocalDateTime = localDate.atTime(LocalTime.now());
// ZonedDateTime 转 LocalDateTime
LocalDateTime zonedDateTimeLocalDateTime = zonedDateTime.toLocalDateTime();
7、其他时间类型转 ZonedDateTime
final Date date = new Date();
final Timestamp timestamp = new Timestamp(date.getTime());
final Calendar calendar = Calendar.getInstance();
final Instant instant = Instant.now();
final LocalDateTime localDateTime = LocalDateTime.now();
final LocalDate localDate = LocalDate.now();
// Date 转 ZonedDateTime
ZonedDateTime dateZonedDateTime = ZonedDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
ZonedDateTime dateZonedDateTime = date.toInstant().atZone(ZoneId.systemDefault());
// Timestamp 转 ZonedDateTime
ZonedDateTime timestampZonedDateTime = ZonedDateTime.ofInstant(timestamp.toInstant(), ZoneId.systemDefault());
// Calendar 转 ZonedDateTime
ZonedDateTime calendarZonedDateTime = ZonedDateTime.ofInstant(calendar.toInstant(), ZoneId.systemDefault());
// Instant 转 ZonedDateTime
ZonedDateTime instantZonedDateTime = instant.atZone(ZoneId.systemDefault());
// LocalDateTime 转 ZonedDateTime
ZonedDateTime localDateTimeZonedDateTime = localDateTime.atZone(ZoneId.systemDefault());
// LocalDate 转 ZonedDateTime
ZonedDateTime localDateZonedDateTime = localDate.atStartOfDay(ZoneId.systemDefault());
8、其他时间类型转时间戳
// Date 转 时间戳
long date = new Date().getTime();
// Timestamp 转 时间戳
long timestamp = new Timestamp(System.currentTimeMillis()).getTime();
// Calendar 转 时间戳
long calendar = Calendar.getInstance().getTimeInMillis();
// Instant 转 时间戳
long instant = Instant.now().toEpochMilli();
// LocalDate 转 时间戳
long localDate = LocalDate.now().atStartOfDay().toInstant(ZoneOffset.of("+8")).toEpochMilli();
long localDate = LocalDate.now().atStartOfDay().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
// LocalDateTime 转 时间戳
long localDateTime = LocalDateTime.now().toInstant(ZoneOffset.of("+8")).toEpochMilli();
long localDateTime = LocalDateTime.now().atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
// ZonedDateTime 转 时间戳
long zonedDateTime = ZonedDateTime.now().toInstant().toEpochMilli();
9、时间戳转其他时间类型
long millis = System.currentTimeMillis();
// 时间戳 转 Date
Date date = new Date(millis);
// 时间戳 转 Timestamp
Timestamp timestamp = new Timestamp(millis);
// 时间戳 转 Calendar
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(millis);
// 时间戳 转 Instant
Instant instant = Instant.ofEpochMilli(millis);
// 时间戳 转 LocalDate
LocalDate localDate = LocalDate.ofInstant(Instant.ofEpochMilli(millis), ZoneId.systemDefault());
// 时间戳 转 LocalDateTime
LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(millis), ZoneId.systemDefault());
// 时间戳 转 ZonedDateTime
ZonedDateTime zonedDateTime = ZonedDateTime.ofInstant(Instant.ofEpochMilli(millis), ZoneId.systemDefault());
10、Java 7 时间工具类
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* @version: V1.0
* @author: fendo
* @className: DateUtil
* @packageName: test
* @description: 时间操作工具类
* @data: 2017-12-20 15:36
**/
public class DateUtil {
public static String pattern = "yyyy-MM-dd";
public static SimpleDateFormat formatter = new SimpleDateFormat(pattern);
public static SimpleDateFormat formatter2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
/**
* 获取现在时间
*
* @return 返回时间类型 yyyy-MM-dd HH:mm:ss
*/
public static Date getNowDate() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(new Date());
ParsePosition pos = new ParsePosition(8);
Date currentTime_2 = formatter.parse(dateString, pos);
return currentTime_2;
}
/**
* 获取现在时间
*
* @return返回短时间格式 yyyy-MM-dd
*/
public static Date getNowDateShort() {
String dateString = formatter.format(new Date());
ParsePosition pos = new ParsePosition(8);
Date currentTime_2 = formatter.parse(dateString, pos);
return currentTime_2;
}
/**
* 获取现在时间
*
* @return返回字符串格式 yyyy-MM-dd HH:mm:ss
*/
public static String getStringDate() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(new Date());
return dateString;
}
/**
* 获取现在时间
*
* @return返回字符串格式 yyyyMMddHHmmss
*/
public static String getStringAllDate() {
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmssSSS");
String dateString = formatter.format(new Date());
return dateString;
}
/**
* 获取现在时间
*
* @return 返回短时间字符串格式yyyy-MM-dd
*/
public static String getStringDateShort() {
String dateString = formatter.format(new Date());
return dateString;
}
/**
* 获取时间 小时:分;秒 HH:mm:ss
*
* @return
*/
public static String getTimeShort() {
SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
String dateString = formatter.format(new Date());
return dateString;
}
/**
* 将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss
*
* @param strDate
* @return
*/
public static Date strToDateLong(String strDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(strDate, pos);
return strtodate;
}
/**
* 将长时间格式时间转换为字符串 yyyy-MM-dd HH:mm:ss
*
* @param dateDate
* @return
*/
public static String dateToStrLong(java.util.Date dateDate) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(dateDate);
return dateString;
}
/**
* 将短时间格式时间转换为字符串 yyyy-MM-dd
*
* @param dateDate
* @return
*/
public static String dateToStr(Date dateDate) {
String dateString = formatter.format(dateDate);
return dateString;
}
/**
* 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) {
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(strDate, pos);
return strtodate;
}
/**
* 将短时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss
*
* @param strDate
* @return
*/
public static Timestamp strToDateSql(String strDate) {
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter2.parse(strDate, pos);
return new Timestamp(strtodate.getTime());
}
/**
* 得到现在时间
*
* @return
*/
public static Date getNow() {
Date currentTime = new Date();
return currentTime;
}
/**
* 提取一个月中的最后一天
*
* @param day
* @return
*/
public static Date getLastDate(long day) {
Date date = new Date();
long date_3_hm = date.getTime() - 3600000 * 34 * day;
Date date_3_hm_date = new Date(date_3_hm);
return date_3_hm_date;
}
/**
* 得到现在时间
*
* @return 字符串 yyyyMMdd HHmmss
*/
public static String getStringToday() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd HHmmss");
String dateString = formatter.format(currentTime);
return dateString;
}
/**
* 功能：<br/>
*
* @author Tony
* @version 2016年12月16日 下午4:41:51 <br/>
*/
public static String getTodayShort() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
String dateString = formatter.format(currentTime);
return dateString;
}
/**
* @param @param value
* @param @return
* @return String
* @throws
* @Description: 输入一个整数类型的字符串, 然后转换成时分秒的形式输出
* 例如：输入568
* 返回结果为：00:09:28
* 输入null或者“”
* 返回结果为:00:00:00
* @author Tony 鬼手卡卡
* @date 2016-4-20
*/
public static String getHHMMSS(String value) {
String hour = "00";
String minute = "00";
String second = "00";
if (value != null && !value.trim().equals("")) {
int v_int = Integer.valueOf(value);
hour = v_int / 3600 + "";//获得小时;
minute = v_int % 3600 / 60 + "";//获得小时;
second = v_int % 3600 % 60 + "";//获得小时;
}
return (hour.length() > 1 ? hour : "0" + hour) + ":" + (minute.length() > 1 ? minute : "0" + minute) + ":" + (second.length() > 1 ? second : "0" + second);
}
/**
* 得到现在小时
*/
public static String getHour() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(currentTime);
String hour;
hour = dateString.substring(11, 13);
return hour;
}
/**
* 得到现在分钟
*
* @return
*/
public static String getTime() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateString = formatter.format(currentTime);
String min;
min = dateString.substring(14, 16);
return min;
}
/**
* 根据用户传入的时间表示格式，返回当前时间的格式 如果是yyyyMMdd，注意字母y不能大写。
*
* @param sformat yyyyMMddhhmmss
* @return
*/
public static String getUserDate(String sformat) {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat(sformat);
String dateString = formatter.format(currentTime);
return dateString;
}
/**
* 二个小时时间间的差值,必须保证二个时间都是"HH:MM"的格式，返回字符型的分钟
*/
public static String getTwoHour(String st1, String st2) {
String[] kk = null;
String[] jj = null;
kk = st1.split(":");
jj = st2.split(":");
if (Integer.parseInt(kk[0]) < Integer.parseInt(jj[0]))
return "0";
else {
double y = Double.parseDouble(kk[0]) + Double.parseDouble(kk[1]) / 60;
double u = Double.parseDouble(jj[0]) + Double.parseDouble(jj[1]) / 60;
if ((y - u) > 0)
return y - u + "";
else
return "0";
}
}
/**
* 得到二个日期间的间隔天数
*/
public static String getTwoDay(String sj1, String sj2) {
long day = 0;
try {
java.util.Date date = formatter.parse(sj1);
java.util.Date mydate = formatter.parse(sj2);
day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
} catch (Exception e) {
return "";
}
return day + "";
}
/**
* 时间前推或后推分钟,其中JJ表示分钟.
*/
public static String getPreTime(String sj1, String jj) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String mydate1 = "";
try {
Date date1 = format.parse(sj1);
long Time = (date1.getTime() / 1000) + Integer.parseInt(jj) * 60;
date1.setTime(Time * 1000);
mydate1 = format.format(date1);
} catch (Exception e) {
}
return mydate1;
}
/**
* 得到一个时间延后或前移几天的时间,nowdate(yyyy-mm-dd)为时间,delay为前移或后延的天数
*/
public static String getNextDay(String nowdate, String delay) {
try {
String mdate = "";
Date d = strToDate(nowdate);
long myTime = (d.getTime() / 1000) + Integer.parseInt(delay) * 24 * 60 * 60;
d.setTime(myTime * 1000);
mdate = formatter.format(d);
return mdate;
} catch (Exception e) {
return "";
}
}
/**
* 功能：<br/> 距离现在几天的时间是多少
* 获得一个时间字符串，格式为：yyyy-MM-dd HH:mm:ss
* day 如果为整数，表示未来时间
* 如果为负数，表示过去时间
*
* @author Tony
* @version 2016年11月29日 上午11:02:56 <br/>
*/
public static String getFromNow(int day) {
Date date = new Date();
long dateTime = (date.getTime() / 1000) + day * 24 * 60 * 60;
date.setTime(dateTime * 1000);
return formatter2.format(date);
}
/**
* 判断是否润年
*
* @param ddate
* @return
*/
public static boolean isLeapYear(String ddate) {
/**
* 详细设计： 1.被400整除是闰年，否则： 2.不能被4整除则不是闰年 3.能被4整除同时不能被100整除则是闰年
* 3.能被4整除同时能被100整除则不是闰年
*/
Date d = strToDate(ddate);
GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
gc.setTime(d);
int year = gc.get(Calendar.YEAR);
if ((year % 400) == 0)
return true;
else if ((year % 4) == 0) {
if ((year % 100) == 0)
return false;
else
return true;
} else
return false;
}
/**
* 返回美国时间格式 26 Apr 2006
*
* @param str
* @return
*/
public static String getEDate(String str) {
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(str, pos);
String j = strtodate.toString();
String[] k = j.split(" ");
return k[2] + k[1].toUpperCase() + k[5].substring(2, 4);
}
/**
* 获取一个月的最后一天
*
* @param dat
* @return
*/
public static String getEndDateOfMonth(String dat) {// yyyy-MM-dd
String str = dat.substring(0, 8);
String month = dat.substring(5, 7);
int mon = Integer.parseInt(month);
if (mon == 1 || mon == 3 || mon == 5 || mon == 7 || mon == 8 || mon == 10 || mon == 12) {
str += "31";
} else if (mon == 4 || mon == 6 || mon == 9 || mon == 11) {
str += "30";
} else {
if (isLeapYear(dat)) {
str += "29";
} else {
str += "28";
}
}
return str;
}
/**
* 判断二个时间是否在同一个周
*
* @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;
}
/**
* 产生周序列,即得到当前时间所在的年度是第几周
*
* @return
*/
public static String getSeqWeek() {
Calendar c = Calendar.getInstance(Locale.CHINA);
String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR));
if (week.length() == 1)
week = "0" + week;
String year = Integer.toString(c.get(Calendar.YEAR));
return year + week;
}
/**
* 获得一个日期所在的周的星期几的日期，如要找出2002年2月3日所在周的星期一是几号
*
* @param sdate
* @param num
* @return
*/
public static String getWeek(String sdate, String num) {
// 再转换为时间
Date dd = DateUtil.strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(dd);
if (num.equals("1")) // 返回星期一所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
else if (num.equals("2")) // 返回星期二所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.TUESDAY);
else if (num.equals("3")) // 返回星期三所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);
else if (num.equals("4")) // 返回星期四所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.THURSDAY);
else if (num.equals("5")) // 返回星期五所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY);
else if (num.equals("6")) // 返回星期六所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
else if (num.equals("0")) // 返回星期日所在的日期
c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
return new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
}
/**
* 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 = DateUtil.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());
}
public static String getWeekStr(String sdate) {
String str = "";
str = DateUtil.getWeek(sdate);
if ("1".equals(str)) {
str = "星期日";
} else if ("2".equals(str)) {
str = "星期一";
} else if ("3".equals(str)) {
str = "星期二";
} else if ("4".equals(str)) {
str = "星期三";
} else if ("5".equals(str)) {
str = "星期四";
} else if ("6".equals(str)) {
str = "星期五";
} else if ("7".equals(str)) {
str = "星期六";
}
return str;
}
/**
* 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
java.util.Date date = null;
java.util.Date mydate = null;
try {
date = formatter.parse(date1);
mydate = formatter.parse(date2);
} catch (Exception e) {
}
long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
return day;
}
/**
* 形成如下的日历 ， 根据传入的一个时间返回一个结构 星期日 星期一 星期二 星期三 星期四 星期五 星期六 下面是当月的各个时间
* 此函数返回该日历第一行星期日所在的日期
*
* @param sdate
* @return
*/
public static String getNowMonth(String sdate) {
// 取该时间所在月的一号
sdate = sdate.substring(0, 8) + "01";
// 得到这个月的1号是星期几
Date date = DateUtil.strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(date);
int u = c.get(Calendar.DAY_OF_WEEK);
String newday = DateUtil.getNextDay(sdate, (1 - u) + "");
return newday;
}
/**
* 取得数据库主键 生成格式为yyyymmddhhmmss+k位随机数
*
* @param k 表示是取几位随机数，可以自己定
*/
public static String getNo(int k) {
return getUserDate("yyyyMMddhhmmss") + getRandom(k);
}
/**
* 返回一个随机数
*
* @param i
* @return
*/
public static String getRandom(int i) {
Random jjj = new Random();
if (i == 0)
return "";
String jj = "";
for (int k = 0; k < i; k++) {
jj = jj + jjj.nextInt(9);
}
return jj;
}
public static boolean RightDate(String date) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
if (date == null)
return false;
if (date.length() > 10) {
sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
} else {
sdf = new SimpleDateFormat("yyyy-MM-dd");
}
try {
sdf.parse(date);
} catch (ParseException pe) {
return false;
}
return true;
}
/***************************************************************************
* //nd=1表示返回的值中包含年度 //yf=1表示返回的值中包含月份 //rq=1表示返回的值中包含日期 //format表示返回的格式 1
* 以年月日中文返回 2 以横线-返回 // 3 以斜线/返回 4 以缩写不带其它符号形式返回 // 5 以点号.返回
**************************************************************************/
public static String getStringDateMonth(String sdate, String nd, String yf, String rq, String format) {
Date currentTime = new Date();
String dateString = formatter.format(currentTime);
String s_nd = dateString.substring(0, 4); // 年份
String s_yf = dateString.substring(5, 7); // 月份
String s_rq = dateString.substring(8, 10); // 日期
String sreturn = "";
//roc.util.MyChar mc = new roc.util.MyChar();
//if (sdate == null || sdate.equals("") || !mc.Isdate(sdate)) { // 处理空值情况
if (sdate == null || sdate.equals("")) {
if (nd.equals("1")) {
sreturn = s_nd;
// 处理间隔符
if (format.equals("1"))
sreturn = sreturn + "年";
else if (format.equals("2"))
sreturn = sreturn + "-";
else if (format.equals("3"))
sreturn = sreturn + "/";
else if (format.equals("5"))
sreturn = sreturn + ".";
}
// 处理月份
if (yf.equals("1")) {
sreturn = sreturn + s_yf;
if (format.equals("1"))
sreturn = sreturn + "月";
else if (format.equals("2"))
sreturn = sreturn + "-";
else if (format.equals("3"))
sreturn = sreturn + "/";
else if (format.equals("5"))
sreturn = sreturn + ".";
}
// 处理日期
if (rq.equals("1")) {
sreturn = sreturn + s_rq;
if (format.equals("1"))
sreturn = sreturn + "日";
}
} else {
// 不是空值，也是一个合法的日期值，则先将其转换为标准的时间格式
sdate = getOKDate(sdate);
s_nd = sdate.substring(0, 4); // 年份
s_yf = sdate.substring(5, 7); // 月份
s_rq = sdate.substring(8, 10); // 日期
if (nd.equals("1")) {
sreturn = s_nd;
// 处理间隔符
if (format.equals("1"))
sreturn = sreturn + "年";
else if (format.equals("2"))
sreturn = sreturn + "-";
else if (format.equals("3"))
sreturn = sreturn + "/";
else if (format.equals("5"))
sreturn = sreturn + ".";
}
// 处理月份
if (yf.equals("1")) {
sreturn = sreturn + s_yf;
if (format.equals("1"))
sreturn = sreturn + "月";
else if (format.equals("2"))
sreturn = sreturn + "-";
else if (format.equals("3"))
sreturn = sreturn + "/";
else if (format.equals("5"))
sreturn = sreturn + ".";
}
// 处理日期
if (rq.equals("1")) {
sreturn = sreturn + s_rq;
if (format.equals("1"))
sreturn = sreturn + "日";
}
}
return sreturn;
}
public static String getNextMonthDay(String sdate, int m) {
sdate = getOKDate(sdate);
int year = Integer.parseInt(sdate.substring(0, 4));
int month = Integer.parseInt(sdate.substring(5, 7));
month = month + m;
if (month < 0) {
month = month + 12;
year = year - 1;
} else if (month > 12) {
month = month - 12;
year = year + 1;
}
String smonth = "";
if (month < 10)
smonth = "0" + month;
else
smonth = "" + month;
return year + "-" + smonth + "-10";
}
/**
* 功能：<br/>
*
* @author Tony
* @version 2015-3-31 上午09:29:31 <br/>
*/
public static String getOKDate(String sdate) {
if (sdate == null || sdate.equals(""))
return getStringDateShort();
// if (!VeStr.Isdate(sdate)) {
// sdate = getStringDateShort();
// }
// // 将“/”转换为“-”
// sdate = VeStr.Replace(sdate, "/", "-");
// 如果只有8位长度，则要进行转换
if (sdate.length() == 8)
sdate = sdate.substring(0, 4) + "-" + sdate.substring(4, 6) + "-" + sdate.substring(6, 8);
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(sdate, pos);
String dateString = formatter.format(strtodate);
return dateString;
}
/**
* 获取当前时间的前一天时间
*
* @param cl
* @return
*/
private static String getBeforeDay(Calendar cl) {
//使用roll方法进行向前回滚
//cl.roll(Calendar.DATE, -1);
//使用set方法直接进行设置
// int day = cl.get(Calendar.DATE);
cl.add(Calendar.DATE, -1);
return formatter.format(cl.getTime());
}
/**
* 获取当前时间的后一天时间
*
* @param cl
* @return
*/
private static String getAfterDay(Calendar cl) {
//使用roll方法进行回滚到后一天的时间
//cl.roll(Calendar.DATE, 1);
//使用set方法直接设置时间值
//int day = cl.get(Calendar.DATE);
cl.add(Calendar.DATE, 1);
return formatter.format(cl.getTime());
}
private static String getDateAMPM() {
GregorianCalendar ca = new GregorianCalendar();
//结果为“0”是上午 结果为“1”是下午
int i = ca.get(GregorianCalendar.AM_PM);
return i == 0 ? "AM" : "PM";
}
private static int compareToDate(String date1, String date2) {
return date1.compareTo(date2);
}
private static int compareToDateString(String date1, String date2) {
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
int i = 0;
try {
long ldate1 = formatter.parse(date1).getTime();
long ldate2 = formatter.parse(date2).getTime();
if (ldate1 > ldate2) {
i = 1;
} else if (ldate1 == ldate2) {
i = 0;
} else {
i = -1;
}
} catch (ParseException e) {
e.printStackTrace();
}
return i;
}
public static String[] getFiveDate() {
String[] dates = new String[2];
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
String five = " 05:00:00";
if (getDateAMPM().equals("AM") && compareToDateString(getStringDate(), getStringDateShort() + five) == -1) {
dates[0] = getBeforeDay(calendar) + five;
dates[1] = getStringDateShort() + five;
} else {
dates[0] = getStringDateShort() + five;
dates[1] = getAfterDay(calendar) + five;
}
return dates;
}
public static String getFiveDate2() {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
String five = " 05:00:00";
String reStr = "";
if (getDateAMPM().equals("AM") && compareToDateString(getStringDate(), getStringDateShort() + five) == -1) {
reStr = getBeforeDay(calendar);
} else {
reStr = getStringDateShort();
}
return reStr;
}
}
11、Java 8 时间工具类
public class LocalDateUtils {
/**
* 显示年月日时分秒，例如 2015-08-11 09:51:53.
*/
public static final String DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
/**
* 仅显示年月日，例如 2015-08-11.
*/
public static final String DATE_PATTERN = "yyyy-MM-dd";
/**
* 仅显示时分秒，例如 09:51:53.
*/
public static final String TIME_PATTERN = "HH:mm:ss";
/**
* 显示年月日时分秒(无符号)，例如 20150811095153.
*/
public static final String UNSIGNED_DATETIME_PATTERN = "yyyyMMddHHmmss";
/**
* 仅显示年月日(无符号)，例如 20150811.
*/
public static final String UNSIGNED_DATE_PATTERN = "yyyyMMdd";
/**
* 春天;
*/
public static final Integer SPRING = 1;
/**
* 夏天;
*/
public static final Integer SUMMER = 2;
/**
* 秋天;
*/
public static final Integer AUTUMN = 3;
/**
* 冬天;
*/
public static final Integer WINTER = 4;
/**
* 星期日;
*/
public static final String SUNDAY = "星期日";
/**
* 星期一;
*/
public static final String MONDAY = "星期一";
/**
* 星期二;
*/
public static final String TUESDAY = "星期二";
/**
* 星期三;
*/
public static final String WEDNESDAY = "星期三";
/**
* 星期四;
*/
public static final String THURSDAY = "星期四";
/**
* 星期五;
*/
public static final String FRIDAY = "星期五";
/**
* 星期六;
*/
public static final String SATURDAY = "星期六";
/**
* 年
*/
private static final String YEAR = "year";
/**
* 月
*/
private static final String MONTH = "month";
/**
* 周
*/
private static final String WEEK = "week";
/**
* 日
*/
private static final String DAY = "day";
/**
* 时
*/
private static final String HOUR = "hour";
/**
* 分
*/
private static final String MINUTE = "minute";
/**
* 秒
*/
private static final String SECOND = "second";
/**
* 获取当前日期和时间字符串.
*
* @return String 日期时间字符串，例如 2015-08-11 09:51:53
*/
public static String getLocalDateTimeStr() {
return format(LocalDateTime.now(), DATETIME_PATTERN);
}
/**
* 获取当前日期字符串.
*
* @return String 日期字符串，例如2015-08-11
*/
public static String getLocalDateStr() {
return format(LocalDate.now(), DATE_PATTERN);
}
/**
* 获取当前时间字符串.
*
* @return String 时间字符串，例如 09:51:53
*/
public static String getLocalTimeStr() {
return format(LocalTime.now(), TIME_PATTERN);
}
/**
* 获取当前星期字符串.
*
* @return String 当前星期字符串，例如 星期二
*/
public static String getDayOfWeekStr() {
return format(LocalDate.now(), "E");
}
/**
* 获取指定日期是星期几
*
* @param localDate 日期
* @return String 星期几
*/
public static String getDayOfWeekStr(LocalDate localDate) {
String[] weekOfDays = {MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY};
int dayOfWeek = localDate.getDayOfWeek().getValue() - 1;
return weekOfDays[dayOfWeek];
}
/**
* 获取日期时间字符串
*
* @param temporal 需要转化的日期时间
* @param pattern 时间格式
* @return String 日期时间字符串，例如 2015-08-11 09:51:53
*/
public static String format(TemporalAccessor temporal, String pattern) {
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
return dateTimeFormatter.format(temporal);
}
/**
* 日期时间字符串转换为日期时间(java.time.LocalDateTime)
*
* @param localDateTimeStr 日期时间字符串
* @param pattern 日期时间格式 例如DATETIME_PATTERN
* @return LocalDateTime 日期时间
*/
public static LocalDateTime parseLocalDateTime(String localDateTimeStr, String pattern) {
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
return LocalDateTime.parse(localDateTimeStr, dateTimeFormatter);
}
/**
* 日期字符串转换为日期(java.time.LocalDate)
*
* @param localDateStr 日期字符串
* @param pattern 日期格式 例如DATE_PATTERN
* @return LocalDate 日期
*/
public static LocalDate parseLocalDate(String localDateStr, String pattern) {
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
return LocalDate.parse(localDateStr, dateTimeFormatter);
}
/**
* 获取指定日期时间加上指定数量日期时间单位之后的日期时间.
*
* @param localDateTime 日期时间
* @param num 数量
* @param chronoUnit 日期时间单位
* @return LocalDateTime 新的日期时间
*/
public static LocalDateTime plus(LocalDateTime localDateTime, int num, ChronoUnit chronoUnit) {
return localDateTime.plus(num, chronoUnit);
}
/**
* 获取指定日期时间减去指定数量日期时间单位之后的日期时间.
*
* @param localDateTime 日期时间
* @param num 数量
* @param chronoUnit 日期时间单位
* @return LocalDateTime 新的日期时间
*/
public static LocalDateTime minus(LocalDateTime localDateTime, int num, ChronoUnit chronoUnit) {
return localDateTime.minus(num, chronoUnit);
}
/**
* 根据ChronoUnit计算两个日期时间之间相隔日期时间
*
* @param start 开始日期时间
* @param end 结束日期时间
* @param chronoUnit 日期时间单位
* @return long 相隔日期时间
*/
public static long getChronoUnitBetween(LocalDateTime start, LocalDateTime end, ChronoUnit chronoUnit) {
return Math.abs(start.until(end, chronoUnit));
}
/**
* 根据ChronoUnit计算两个日期之间相隔年数或月数或天数
*
* @param start 开始日期
* @param end 结束日期
* @param chronoUnit 日期时间单位,(ChronoUnit.YEARS,ChronoUnit.MONTHS,ChronoUnit.WEEKS,ChronoUnit.DAYS)
* @return long 相隔年数或月数或天数
*/
public static long getChronoUnitBetween(LocalDate start, LocalDate end, ChronoUnit chronoUnit) {
return Math.abs(start.until(end, chronoUnit));
}
/**
* 获取本年第一天的日期字符串
*
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfYearStr() {
return getFirstDayOfYearStr(LocalDateTime.now());
}
/**
* 获取本年最后一天的日期字符串
*
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfYearStr() {
return getLastDayOfYearStr(LocalDateTime.now());
}
/**
* 获取指定日期当年第一天的日期字符串
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfYearStr(LocalDateTime localDateTime) {
return getFirstDayOfYearStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期当年最后一天的日期字符串
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfYearStr(LocalDateTime localDateTime) {
return getLastDayOfYearStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期当年第一天的日期字符串,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfYearStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.withDayOfYear(1).withHour(0).withMinute(0).withSecond(0), pattern);
}
/**
* 获取指定日期当年最后一天的日期字符串,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfYearStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.with(TemporalAdjusters.lastDayOfYear()).withHour(23).withMinute(59).withSecond(59), pattern);
}
/**
* 获取本月第一天的日期字符串
*
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfMonthStr() {
return getFirstDayOfMonthStr(LocalDateTime.now());
}
/**
* 获取本月最后一天的日期字符串
*
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfMonthStr() {
return getLastDayOfMonthStr(LocalDateTime.now());
}
/**
* 获取指定日期当月第一天的日期字符串
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getFirstDayOfMonthStr(LocalDateTime localDateTime) {
return getFirstDayOfMonthStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期当月最后一天的日期字符串
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfMonthStr(LocalDateTime localDateTime) {
return getLastDayOfMonthStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期当月第一天的日期字符串,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfMonthStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.withDayOfMonth(1).withHour(0).withMinute(0).withSecond(0), pattern);
}
/**
* 获取指定日期当月最后一天的日期字符串,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfMonthStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.with(TemporalAdjusters.lastDayOfMonth()).withHour(23).withMinute(59).withSecond(59), pattern);
}
/**
* 获取本周第一天的日期字符串
*
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfWeekStr() {
return getFirstDayOfWeekStr(LocalDateTime.now());
}
/**
* 获取本周最后一天的日期字符串
*
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfWeekStr() {
return getLastDayOfWeekStr(LocalDateTime.now());
}
/**
* 获取指定日期当周第一天的日期字符串,这里第一天为周一
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfWeekStr(LocalDateTime localDateTime) {
return getFirstDayOfWeekStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期当周最后一天的日期字符串,这里最后一天为周日
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfWeekStr(LocalDateTime localDateTime) {
return getLastDayOfWeekStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期当周第一天的日期字符串,这里第一天为周一,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getFirstDayOfWeekStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.with(DayOfWeek.MONDAY).withHour(0).withMinute(0).withSecond(0), pattern);
}
/**
* 获取指定日期当周最后一天的日期字符串,这里最后一天为周日,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getLastDayOfWeekStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.with(DayOfWeek.SUNDAY).withHour(23).withMinute(59).withSecond(59), pattern);
}
/**
* 获取今天开始时间的日期字符串
*
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getStartTimeOfDayStr() {
return getStartTimeOfDayStr(LocalDateTime.now());
}
/**
* 获取今天结束时间的日期字符串
*
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getEndTimeOfDayStr() {
return getEndTimeOfDayStr(LocalDateTime.now());
}
/**
* 获取指定日期开始时间的日期字符串
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 00:00:00
*/
public static String getStartTimeOfDayStr(LocalDateTime localDateTime) {
return getStartTimeOfDayStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期结束时间的日期字符串
*
* @param localDateTime 指定日期时间
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getEndTimeOfDayStr(LocalDateTime localDateTime) {
return getEndTimeOfDayStr(localDateTime, DATETIME_PATTERN);
}
/**
* 获取指定日期开始时间的日期字符串,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd HH:mm:ss
*/
public static String getStartTimeOfDayStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.withHour(0).withMinute(0).withSecond(0), pattern);
}
/**
* 获取指定日期结束时间的日期字符串,带日期格式化参数
*
* @param localDateTime 指定日期时间
* @param pattern 日期时间格式
* @return String 格式：yyyy-MM-dd 23:59:59
*/
public static String getEndTimeOfDayStr(LocalDateTime localDateTime, String pattern) {
return format(localDateTime.withHour(23).withMinute(59).withSecond(59), pattern);
}
/**
* 切割日期。按照周期切割成小段日期段。例如： <br>
*
* @param startDate 开始日期（yyyy-MM-dd）
* @param endDate 结束日期（yyyy-MM-dd）
* @param period 周期（天，周，月，年）
* @return 切割之后的日期集合
* <li>startDate="2019-02-28",endDate="2019-03-05",period="day"</li>
* <li>结果为：[2019-02-28, 2019-03-01, 2019-03-02, 2019-03-03, 2019-03-04, 2019-03-05]</li><br>
* <li>startDate="2019-02-28",endDate="2019-03-25",period="week"</li>
* <li>结果为：[2019-02-28,2019-03-06, 2019-03-07,2019-03-13, 2019-03-14,2019-03-20,
* 2019-03-21,2019-03-25]</li><br>
* <li>startDate="2019-02-28",endDate="2019-05-25",period="month"</li>
* <li>结果为：[2019-02-28,2019-02-28, 2019-03-01,2019-03-31, 2019-04-01,2019-04-30,
* 2019-05-01,2019-05-25]</li><br>
* <li>startDate="2019-02-28",endDate="2020-05-25",period="year"</li>
* <li>结果为：[2019-02-28,2019-12-31, 2020-01-01,2020-05-25]</li><br>
*/
public static List<String> listDateStrs(String startDate, String endDate, String period) {
List<String> result = new ArrayList<>();
DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(DATE_PATTERN);
LocalDate end = LocalDate.parse(endDate, dateTimeFormatter);
LocalDate start = LocalDate.parse(startDate, dateTimeFormatter);
LocalDate tmp = start;
switch (period) {
case DAY:
while (start.isBefore(end) || start.isEqual(end)) {
result.add(start.toString());
start = start.plusDays(1);
}
break;
case WEEK:
while (tmp.isBefore(end) || tmp.isEqual(end)) {
if (tmp.plusDays(6).isAfter(end)) {
result.add(tmp.toString() + "," + end);
} else {
result.add(tmp.toString() + "," + tmp.plusDays(6));
}
tmp = tmp.plusDays(7);
}
break;
case MONTH:
while (tmp.isBefore(end) || tmp.isEqual(end)) {
LocalDate lastDayOfMonth = tmp.with(TemporalAdjusters.lastDayOfMonth());
if (lastDayOfMonth.isAfter(end)) {
result.add(tmp.toString() + "," + end);
} else {
result.add(tmp.toString() + "," + lastDayOfMonth);
}
tmp = lastDayOfMonth.plusDays(1);
}
break;
case YEAR:
while (tmp.isBefore(end) || tmp.isEqual(end)) {
LocalDate lastDayOfYear = tmp.with(TemporalAdjusters.lastDayOfYear());
if (lastDayOfYear.isAfter(end)) {
result.add(tmp.toString() + "," + end);
} else {
result.add(tmp.toString() + "," + lastDayOfYear);
}
tmp = lastDayOfYear.plusDays(1);
}
break;
default:
break;
}
return result;
}
public static void main(String[] args) {
System.out.println(getLocalDateTimeStr());
System.out.println(getLocalDateStr());
System.out.println(getLocalTimeStr());
System.out.println(getDayOfWeekStr());
System.out.println(getDayOfWeekStr(LocalDate.now()));
System.out.println("========");
System.out.println(format(LocalDate.now(), UNSIGNED_DATE_PATTERN));
System.out.println("========");
System.out.println(parseLocalDateTime("2020-12-13 11:14:12", DATETIME_PATTERN));
System.out.println(parseLocalDate("2020-12-13", DATE_PATTERN));
System.out.println("========");
System.out.println(plus(LocalDateTime.now(), 3, ChronoUnit.HOURS));
System.out.println(minus(LocalDateTime.now(), 4, ChronoUnit.DAYS));
System.out.println("========");
System.out.println(getChronoUnitBetween(LocalDateTime.now(), parseLocalDateTime("2020-12-12 12:03:12", DATETIME_PATTERN), ChronoUnit.MINUTES));
System.out.println(getChronoUnitBetween(LocalDate.now(), parseLocalDate("2021-12-12", DATE_PATTERN), ChronoUnit.WEEKS));
System.out.println("========");
System.out.println(getFirstDayOfYearStr());
System.out.println(getFirstDayOfYearStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getFirstDayOfYearStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println(getLastDayOfYearStr());
System.out.println(getLastDayOfYearStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getLastDayOfYearStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println("========");
System.out.println(getFirstDayOfMonthStr());
System.out.println(getFirstDayOfMonthStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getFirstDayOfMonthStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println(getLastDayOfMonthStr());
System.out.println(getLastDayOfMonthStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getLastDayOfMonthStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println("========");
System.out.println(getFirstDayOfWeekStr());
System.out.println(getFirstDayOfWeekStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getFirstDayOfWeekStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println(getLastDayOfWeekStr());
System.out.println(getLastDayOfWeekStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getLastDayOfWeekStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println("========");
System.out.println(getStartTimeOfDayStr());
System.out.println(getStartTimeOfDayStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getStartTimeOfDayStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println(getEndTimeOfDayStr());
System.out.println(getEndTimeOfDayStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN)));
System.out.println(getEndTimeOfDayStr(parseLocalDateTime("2021-12-12 12:03:12", DATETIME_PATTERN), UNSIGNED_DATETIME_PATTERN));
System.out.println("========");
List<String> dateStrs = listDateStrs("2019-01-30", "2020-12-13", YEAR);
for (String dateStr : dateStrs) {
System.out.println(dateStr);
}
System.out.println("========");
List<String> dateStrs1 = listDateStrs("2019-01-30", "2020-12-13", MONTH);
for (String dateStr : dateStrs1) {
System.out.println(dateStr);
}
System.out.println("========");
List<String> dateStrs2 = listDateStrs("2020-12-01", "2020-12-13", DAY);
for (String dateStr : dateStrs2) {
System.out.println(dateStr);
}
}
}
日期时间类创建解析速度测试
JAVA日期时间类创建解析速度测试：https://blog.csdn.net/kfepiza/article/details/115448573
public class 日期时间类创建解析速度测试 {
long totalAmount001 = 10_000_000L;
void p(Object o) {
System.out.println(o);
}
@Test
public void testSystemCurrentTimeMillisSpeed() {
long v = 0;
for (long i = 0; i < totalAmount001; i++) {
v = System.currentTimeMillis();
}
p(v);
}
@Test
public void testInstantNowSpeed() {
Instant instant = null;
for (long i = 0; i < totalAmount001; i++) {
instant = Instant.now();
}
p(instant);
}
@Test
public void testLocalDateNowSpeed() {
LocalDate localDate = null;
for (long i = 0; i < totalAmount001; i++) {
localDate = LocalDate.now();
}
System.out.println(localDate);
}
@Test
public void testLocalTimeNowSpeed() {
LocalTime localTime = null;
for (long i = 0; i < totalAmount001; i++) {
localTime = LocalTime.now();
}
System.out.println(localTime);
}
@Test
public void testLocalDateTimeNowSpeed() {
LocalDateTime localDateTime = null;
for (long l = 0; l < totalAmount001; l++) {
localDateTime = LocalDateTime.now();
}
System.out.println(localDateTime);
}
@Test
public void testLocalDateTimeOfIntSpeed() {
LocalDateTime localDateTime = null;
for (long l = 0; l < totalAmount001; l++) {
localDateTime = LocalDateTime.of(2021, 4, 4, 8, 0, 0);
}
System.out.println(localDateTime);
}
@Test
public void testLocalDateTimeOfIntegerValueOfStringSpeed() {
LocalDateTime localDateTime = null;
for (long l = 0; l < totalAmount001; l++) {
localDateTime = LocalDateTime.of(
Integer.valueOf("2021"), Integer.valueOf("4"), Integer.valueOf("5")
, Integer.valueOf("0"), Integer.valueOf("0"), Integer.valueOf("0")
);
}
System.out.println(localDateTime);
}
@Test
public void testLocalDateTimeParseStringSpeed() {
LocalDateTime localDateTime = null;
for (long l = 0; l < totalAmount001; l++) {
localDateTime = LocalDateTime.parse("2021-04-04T08:08:08");
}
System.out.println(localDateTime);
}
@Test
public void testNewUtilDateSpeed() {
java.util.Date utilDate = null;
for (long l = 0; l < totalAmount001; l++) {
utilDate = new java.util.Date();
}
System.out.println(utilDate);
}
@Test
public void testNewTimestampLongSpeed() {
Timestamp timestamp = null;
for (long l = 0; l < totalAmount001; l++) {
timestamp = new Timestamp(0);
}
p(timestamp);
}
@Test
public void testNewTimestampSystemCurrenttTimeMillisSpeed() {
Timestamp timestamp = null;
for (long l = 0; l < totalAmount001; l++) {
timestamp = new Timestamp(System.currentTimeMillis());
}
p(timestamp);
}
@Test
public void testTimestampValueOfStringSpeed() {
Timestamp timestamp = null;
for (long l = 0; l < totalAmount001; l++) {
timestamp = Timestamp.valueOf("2021-04-05 01:18:18");
}
p(timestamp);
}
}
- System.currentTimeMillis() 比 Instant.now() 快3倍
- new Date() 比 LocalDateTime.now() 快10倍
- LocalDateTime.of(int , int …) 速度还是挺快的
- LocalDateTime.now()比LocalDateTime.of(int) 慢了近50倍
- LocalDateTime.parse(字符串)比LocalDateTime.now() 还慢20倍
- LocalDateTime.parse(“2021-04-05T00:00:00”)中间的 T 不能少
- 用官方方式解析字符串获得时间真的很慢：
- Timestamp.valueOf(String)比 new Timestamp(long) 慢60倍
- LocalDateTime.parse(String)比LocalDateTime.of(int,int…)慢800倍
- LocalDateTime.parse(String)比Timestamp.valueOf(String)慢6倍
- LocalDateTime.of(2021, 4, 8, 8, 8); 比 LocalDateTime.parse(“2021-04-04T08:08:08”) 快 200 倍!
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