最近在做統計相關的功能的時候涉及到了獲取當天的開始和結束的時間戳、當月和當年的開始結束時間戳，特此記錄，以作備忘。
相關代碼
package com.lingyejun.authenticator;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.TimeZone;
public class CalendarAdjust {
/**
* 獲取指定某一天的開始時間戳
*
* @param timeStamp 毫秒級時間戳
* @param timeZone 如 GMT+8:00
* @return
*/
public static Long getDailyStartTime(Long timeStamp, String timeZone) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone(timeZone));
calendar.setTimeInMillis(timeStamp);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTimeInMillis();
}
/**
* 獲取指定某一天的結束時間戳
*
* @param timeStamp 毫秒級時間戳
* @param timeZone 如 GMT+8:00
* @return
*/
public static Long getDailyEndTime(Long timeStamp, String timeZone) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone(timeZone));
calendar.setTimeInMillis(timeStamp);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
return calendar.getTimeInMillis();
}
/**
* 獲取當月開始時間戳
*
* @param timeStamp 毫秒級時間戳
* @param timeZone 如 GMT+8:00
* @return
*/
public static Long getMonthStartTime(Long timeStamp, String timeZone) {
Calendar calendar = Calendar.getInstance();// 獲取當前日期
calendar.setTimeZone(TimeZone.getTimeZone(timeZone));
calendar.setTimeInMillis(timeStamp);
calendar.add(Calendar.YEAR, 0);
calendar.add(Calendar.MONTH, 0);
calendar.set(Calendar.DAY_OF_MONTH, 1);// 設置爲1號,當前日期既爲本月第一天
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTimeInMillis();
}
/**
* 獲取當月的結束時間戳
*
* @param timeStamp 毫秒級時間戳
* @param timeZone 如 GMT+8:00
* @return
*/
public static Long getMonthEndTime(Long timeStamp, String timeZone) {
Calendar calendar = Calendar.getInstance();// 獲取當前日期
calendar.setTimeZone(TimeZone.getTimeZone(timeZone));
calendar.setTimeInMillis(timeStamp);
calendar.add(Calendar.YEAR, 0);
calendar.add(Calendar.MONTH, 0);
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));// 獲取當前月最後一天
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
return calendar.getTimeInMillis();
}
/**
* 獲取當年的開始時間戳
*
* @param timeStamp 毫秒級時間戳
* @param timeZone 如 GMT+8:00
* @return
*/
public static Long getYearStartTime(Long timeStamp, String timeZone) {
Calendar calendar = Calendar.getInstance();// 獲取當前日期
calendar.setTimeZone(TimeZone.getTimeZone(timeZone));
calendar.setTimeInMillis(timeStamp);
calendar.add(Calendar.YEAR, 0);
calendar.add(Calendar.DATE, 0);
calendar.add(Calendar.MONTH, 0);
calendar.set(Calendar.DAY_OF_YEAR, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTimeInMillis();
}
/**
* 獲取當年的最後時間戳
*
* @param timeStamp 毫秒級時間戳
* @param timeZone 如 GMT+8:00
* @return
*/
public static Long getYearEndTime(Long timeStamp, String timeZone) {
Calendar calendar = Calendar.getInstance();// 獲取當前日期
calendar.setTimeZone(TimeZone.getTimeZone(timeZone));
calendar.setTimeInMillis(timeStamp);
int year = calendar.get(Calendar.YEAR);
calendar.clear();
calendar.set(Calendar.YEAR, year);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
calendar.roll(Calendar.DAY_OF_YEAR, -1);
return calendar.getTimeInMillis();
}
/**
* 時間戳轉字符串
*
* @param timestamp 毫秒級時間戳
* @param zoneId 如 GMT+8或UTC+08:00
* @return
*/
public static String timestampToStr(long timestamp, String zoneId) {
ZoneId timezone = ZoneId.of(zoneId);
LocalDateTime localDateTime = LocalDateTime.ofInstant(Instant.ofEpochMilli(timestamp), timezone);
return localDateTime.toString();
}
public static void main(String[] args) {
Long currentTime = System.currentTimeMillis();
System.out.println("Current Time : " + currentTime + " = " + timestampToStr(currentTime, "GMT+8"));
Long dailyStart = getDailyStartTime(currentTime, "GMT+8:00");
Long dailyEnd = getDailyEndTime(currentTime, "GMT+8:00");
Long monthStart = getMonthStartTime(currentTime, "GMT+8:00");
Long monthEnd = getMonthEndTime(currentTime, "GMT+8:00");
Long yearStart = getYearStartTime(currentTime, "GMT+8:00");
Long yearEnd = getYearEndTime(currentTime, "GMT+8:00");
System.out.println("Daily Start : " + dailyStart + " = " + timestampToStr(dailyStart, "GMT+8") + " Daily End : " + dailyEnd + " = " + timestampToStr(dailyEnd, "GMT+8"));
System.out.println("Month Start : " + monthStart + " = " + timestampToStr(monthStart, "GMT+8") + " Month End : " + monthEnd + " = " + timestampToStr(monthEnd, "GMT+8"));
System.out.println("Year Start : " + yearStart + " = " + timestampToStr(yearStart, "GMT+8") + " Year End : " + yearEnd + " = " + timestampToStr(yearEnd, "GMT+8"));
}
}