获取时间/日期工具类:格式化日期,获取当前时间,指定时间,上一月,指定时间的毫秒数

布满荆棘的人生 2022-06-12 14:09 268阅读 0赞

import java.text.DateFormat;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    
    public class DateTimeUtils {
    	// 默认显示日期的格式
    	public static final String DATE_FORMAT = "yyyy-MM-dd";
    	// 默认显示日期时间的格式
    	public static final String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
    	// 默认显示日期时间的格式
    	public static final String DATE_TIME_MILLIS_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";
    	// 显示年月日时分的格式
    	public static final String DATE_TIME_MINUTE_FORMAT = "yyyy-MM-dd HH:mm";
    
    	private final static DateFormat mDateFormat = new SimpleDateFormat(DATE_FORMAT);
    	private final static DateFormat mDateTimeFormat = new SimpleDateFormat(DATE_TIME_FORMAT);
    	private final static DateFormat mDateTimeMillisFormat = new SimpleDateFormat(DATE_TIME_MILLIS_FORMAT);
    	private final static DateFormat mDataTimeMinuteFormat = new SimpleDateFormat(DATE_TIME_MINUTE_FORMAT);
    
    	/**
    	 * @see 获取当前时间年份
    	 */
    	public static int GetYear() {
    		return Calendar.getInstance().get(Calendar.YEAR);
    	}
    
    	/**
    	 * @see 获取指定时间年份
    	 */
    	public static int GetYear(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.YEAR);
    	}
    
    	/**
    	 * @see 获取上一个月的年份
    	 */
    	public static int GetYearByLastMonth() {
    		Calendar calendar = Calendar.getInstance();
    		calendar.add(Calendar.MONTH, -1);
    		return calendar.get(Calendar.YEAR);
    	}
    
    	/**
    	 * @see 获取当前时间月份
    	 */
    	public static int GetMonth() {
    		return Calendar.getInstance().get(Calendar.MONTH) + 1;
    	}
    
    	/**
    	 * @see 获取上一个月的月份
    	 */
    	public static int GetLastMonth() {
    		Calendar calendar = Calendar.getInstance();
    		calendar.add(Calendar.MONTH, -1);
    		return calendar.get(Calendar.MONTH) + 1;
    	}
    
    	/**
    	 * @see 获取指定时间月份
    	 */
    	public static int GetMonth(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.MONTH) + 1;
    	}
    
    	/**
    	 * @see 获取当前时间日期
    	 */
    	public static int GetMonthDay() {
    		return Calendar.getInstance().get(Calendar.DAY_OF_MONTH);
    	}
    
    	/**
    	 * @see 获取指定时间日期
    	 */
    	public static int GetMonthDay(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.DAY_OF_MONTH);
    	}
    
    	/**
    	 * @see 获取当前时间：Hour
    	 */
    	public static int GetHour() {
    		return Calendar.getInstance().get(Calendar.HOUR_OF_DAY);
    	}
    
    	/**
    	 * @see 获取指定时间：Hour
    	 */
    	public static int GetHour(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.HOUR_OF_DAY);
    	}
    
    	/**
    	 * @see 获取当前时间：Minute
    	 */
    	public static int GetMinute() {
    		return Calendar.getInstance().get(Calendar.MINUTE);
    	}
    
    	/**
    	 * @see 获取指定时间：Minute
    	 */
    	public static int GetMinute(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.MINUTE);
    	}
    
    	/**
    	 * @see 获取当前时间：Second
    	 */
    	public static int GetSecond() {
    		return Calendar.getInstance().get(Calendar.SECOND);
    	}
    
    	/**
    	 * @see 获取指定时间：Second
    	 */
    	public static int GetSecond(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.SECOND);
    	}
    
    	/**
    	 * @see 获取当前时间：Week
    	 */
    	public static int GetWeek() {
    		return Calendar.getInstance().get(Calendar.DAY_OF_WEEK);
    	}
    
    	/**
    	 * @see 获取指定时间：Week
    	 */
    	public static int GetWeek(long time) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTimeInMillis(time);
    		return calendar.get(Calendar.DAY_OF_WEEK);
    	}
    
    	/**
    	 * @see 是否为当月的第一天
    	 */
    	public static boolean IsFristDayInMonth() {
    		return 1 == GetMonthDay();
    	}
    
    	/**
    	 * @see 是否为当月的第一天
    	 */
    	public static boolean IsFristDayInMonth(long time) {
    		return 1 == GetMonthDay(time);
    	}
    
    	/**
    	 * @see 是否为当年的第一月
    	 */
    	public static boolean IsFristMonthInYear() {
    		return 1 == GetMonth();
    	}
    
    	/**
    	 * @see 是否为当年的第一月
    	 */
    	public static boolean IsFristMonthInYear(long time) {
    		return 1 == GetMonth(time);
    	}
    
    	/**
    	 * @see 当前时间 => 日期字符串 ： 年-月-日
    	 */
    	public static String GetDateString() {
    		return mDateFormat.format(new Date());
    	}
    
    	/**
    	 * @see 指定时间 => 日期字符串 ： 年-月-日
    	 */
    	public static String ConvertToDateString(long time) {
    		return mDateFormat.format(new Date(time));
    	}
    
    	/**
    	 * @see 日期字符串 => 指定时间
    	 */
    	public static Date ConvertToDate(String date) throws Exception {
    		return mDateFormat.parse(date);
    	}
    
    	/**
    	 * @see 当前时间 => 时间字符串 ： 年-月-日 时：分：秒
    	 */
    	public static String GetDateTimeString() {
    		return mDateTimeFormat.format(new Date());
    	}
    
    	/**
    	 * @see 指定时间 => 时间字符串 ： 年-月-日 时：分：秒
    	 */
    	public static String ConvertToDateTimeString(long time) {
    		return mDateTimeFormat.format(new Date(time));
    	}
    
    	/**
    	 * @see 时间字符串 => 指定时间 年:月:日
    	 */
    	public static Date ConvertToDateTime(String date) throws Exception {
    		return mDateTimeFormat.parse(date);
    	}
    
    	/**
    	 * @see 时间字符串 => 指定时间 年:月:日 时:分:秒
    	 */
    	public static long ConvertToLongTimeWithDateTime(String dateTime) {
    		try {
    			return ConvertToDateTime(dateTime).getTime();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return 0;
    	}
    
    	/**
    	 * @see 时间字符串 => 指定时间
    	 */
    	public static long ConvertToLongTimeWithDate(String date) {
    		try {
    			return ConvertToDate(date).getTime();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    		return 0;
    	}
    
    	/**
    	 * @see 获取时间字符串：年-月-日 时：分：秒.毫秒
    	 */
    	public static String GetDateTimeMillisString() {
    		return mDateTimeMillisFormat.format(new Date());
    	}
    
    	/**
    	 * @see 获取时间字符串：年-月-日 时：分
    	 */
    	public static String GetDateTimeMinuteString() {
    		return mDataTimeMinuteFormat.format(new Date());
    	}
    
    	/**
    	 * @return 昨日指定时间的毫秒数(24小时制)
    	 */
    	public static long GetYesterdaywAppointedTime(int hour, int minute, int second) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.set(Calendar.HOUR_OF_DAY, hour);
    		calendar.set(Calendar.MINUTE, minute);
    		calendar.set(Calendar.SECOND, second);
    		calendar.set(Calendar.MILLISECOND, 0);
    		calendar.add(Calendar.DAY_OF_MONTH, -1);
    		return calendar.getTimeInMillis();
    	}
    
    	/**
    	 * @return 今日指定时间的毫秒数(24小时制)
    	 */
    	public static long GetTodayAppointedTime(int hour, int minute, int second) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.set(Calendar.HOUR_OF_DAY, hour);
    		calendar.set(Calendar.MINUTE, minute);
    		calendar.set(Calendar.SECOND, second);
    		calendar.set(Calendar.MILLISECOND, 0);
    		return calendar.getTimeInMillis();
    	}
    
    	/**
    	 * @return 明日指定时间的毫秒数(24小时制)
    	 */
    	public static long GetTomorrowAppointedTime(int hour, int minute, int second) {
    		Calendar calendar = Calendar.getInstance();
    		calendar.set(Calendar.HOUR_OF_DAY, hour);
    		calendar.set(Calendar.MINUTE, minute);
    		calendar.set(Calendar.SECOND, second);
    		calendar.set(Calendar.MILLISECOND, 0);
    		calendar.add(Calendar.DAY_OF_MONTH, +1);
    		return calendar.getTimeInMillis();
    	}
    
    	/**
    	 * @return 获取周日24点的时间
    	 */
    	public static long GetSundayZeroTime() {
    		Calendar calendar = Calendar.getInstance();
    		if (calendar.get(Calendar.DAY_OF_WEEK) > Calendar.SUNDAY) {
    			calendar.add(Calendar.WEEK_OF_MONTH, 1);
    		}
    		calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
    		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();
    	}
    
    	/**
    	 * @see 获取当前日期与指定日期相差的天数
    	 */
    	public static int CompareByDay(String date) {
    		try {
    			return (int) (((new Date()).getTime() - ConvertToDate(date).getTime()) / (24 * 60 * 60 * 1000));
    		} catch (Exception e) {
    			e.printStackTrace();
    			return -1;
    		}
    	}
    
    	/**
    	 * @see 是否为同一月
    	 */
    	public static boolean IsCurrentMonth(long time) {
    		return GetYear() == GetYear(time) && GetMonth() == GetMonth(time);
    	}
    
    	/**
    	 * @see 是否为同一天
    	 */
    	public static boolean IsCurrentDay(long time) {
    		return IsCurrentMonth(time) && GetMonthDay() == GetMonthDay(time);
    	}
    
    	/**
    	 * @see 根据上月总天数
    	 */
    	public static int GetLastMonthDays() {
    		Calendar cal = Calendar.getInstance();
    		cal.set(Calendar.DAY_OF_MONTH, 1);
    		cal.add(Calendar.DAY_OF_MONTH, -1);
    		return cal.get(Calendar.DAY_OF_MONTH);
    	}
    
    	/**
    	 * @see 获取当月总天数
    	 */
    	public static int GetCurrentMonthDays() {
    		Calendar a = Calendar.getInstance();
    		a.set(Calendar.DATE, 1);
    		a.roll(Calendar.DATE, -1);
    		return a.get(Calendar.DATE);
    	}
    }