工具类：日期操作类

电玩女神 2024-03-22 12:52 101阅读 0赞

import org.apache.commons.lang3.StringUtils;
    import java.sql.Timestamp;
    import java.text.DateFormat;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    
    
    public class DateUtil {
        
    	private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");
    
    	private final static SimpleDateFormat sdfDay = new SimpleDateFormat("yyyy-MM-dd");
    
    	private final static SimpleDateFormat sdfDays = new SimpleDateFormat("yyyyMMdd");
    
    	private final static SimpleDateFormat sdfTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    
    	/**
    	 * 获取YYYY格式
    	 *
    	 * @return
    	 */
    	public static String getYear() {
        
    		return sdfYear.format(new Date());
    	}
    
    	Timestamp timestamp = new Timestamp(new Date().getTime());
    
    	/**
    	 * 获取YYYY-MM-DD格式
    	 *
    	 * @return
    	 */
    	public static String getDay() {
        
    		return sdfDay.format(new Date());
    	}
    
    	/**
    	 * 获取YYYYMMDD格式
    	 *
    	 * @return
    	 */
    	public static String getDays() {
        
    		return sdfDays.format(new Date());
    	}
    
    	/**
    	 * 获取YYYY-MM-DD hh:mm:ss格式
    	 *
    	 * @return
    	 */
    	public static String getTime() {
        
    		return sdfTime.format(new Date());
    	}
    
    	/**
    	* @Title: compareDate
    	* @Description:(日期比较，如果s>=e 返回true 否则返回false)
    	* @param s
    	* @param e
    	* @return boolean
    	* @throws
    	* @author luguosui
    	 */
    	public static boolean compareDate(String s, String e) {
        
    		if (fomatDate(s) == null || fomatDate(e) == null) {
        
    			return false;
    		}
    		return Objects.requireNonNull(fomatDate(s)).getTime() >= Objects.requireNonNull(fomatDate(e)).getTime();
    	}
    
    	/**
    	 * 格式化日期
    	 *
    	 * @return
    	 */
    	public static Date fomatDate(String date) {
        
    		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
    		try {
        
    			return fmt.parse(date);
    		} catch (ParseException e) {
        
    			e.printStackTrace();
    			return null;
    		}
    	}
    
    	/**
    	 * 校验日期是否合法
    	 *
    	 * @return
    	 */
    	public static boolean isValidDate(String s) {
        
    		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
    		try {
        
    			fmt.parse(s);
    			return true;
    		} catch (Exception e) {
        
    			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
    			return false;
    		}
    	}
    
    	public static int getDiffYear(String startTime, String endTime) {
        
    		DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
    		try {
        
    			int years = (int) (((fmt.parse(endTime).getTime() - fmt.parse(startTime).getTime()) / (1000 * 60 * 60 * 24)) / 365);
    			return years;
    		} catch (Exception e) {
        
    			// 如果throw java.text.ParseException或者NullPointerException，就说明格式不对
    			return 0;
    		}
    	}
    
    	/**
    	* <li>功能描述：时间相减得到天数
    	* @param beginDateStr
    	* @param endDateStr
    	* @return
    	* long
    	* @author Administrator
    	*/
    	public static long getDaySub(String beginDateStr, String endDateStr) {
        
    		long day = 0;
    		java.text.SimpleDateFormat format = new java.text.SimpleDateFormat("yyyy-MM-dd");
    		java.util.Date beginDate = null;
    		java.util.Date endDate = null;
    
    		try {
        
    			beginDate = format.parse(beginDateStr);
    			endDate = format.parse(endDateStr);
    		} catch (ParseException e) {
        
    			e.printStackTrace();
    		}
    		day = (endDate.getTime() - beginDate.getTime()) / (24 * 60 * 60 * 1000);
    		// System.out.println("相隔的天数="+day);
    
    		return day;
    	}
    
    	/**
    	 * 得到n天之后的日期
    	 * @param days
    	 * @return
    	 */
    	public static String getAfterDayDate(String days) {
        
    		int daysInt = Integer.parseInt(days);
    
    		Calendar canlendar = Calendar.getInstance(); // java.util包
    		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
    		Date date = canlendar.getTime();
    
    		SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		String dateStr = sdfd.format(date);
    
    		return dateStr;
    	}
    	/**
    	 * 得到n天之前的日期
    	 * @param days
    	 * @return
    	 */
    	public static String getBeforeDayDate(String days) {
        
    		int daysInt = Integer.parseInt(days);
    
    		Calendar canlendar = Calendar.getInstance(); // java.util包
    		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
    		Date date = canlendar.getTime();
    
    		String dateStr = sdfDays.format(date);
    
    		return dateStr;
    	}
    
    	/**
    	 * 得到n天之后是周几
    	 * @param days
    	 * @return
    	 */
    	public static String getAfterDayWeek(String days) {
        
    		int daysInt = Integer.parseInt(days);
    
    		Calendar canlendar = Calendar.getInstance(); // java.util包
    		canlendar.add(Calendar.DATE, daysInt); // 日期减 如果不够减会将月变动
    		Date date = canlendar.getTime();
    
    		SimpleDateFormat sdf = new SimpleDateFormat("E");
    		String dateStr = sdf.format(date);
    
    		return dateStr;
    	}
    
    	/**
    	 * 按照yyyy-MM-dd HH:mm:ss的格式，日期转字符串
    	 * @param date
    	 * @return yyyy-MM-dd HH:mm:ss
    	 */
    	public static String date2Str(Date date) {
        
    		return date2Str(date, "yyyy-MM-dd");
    	}
    
    	/**
    	 * 按照yyyy-MM-dd HH:mm:ss的格式，字符串转日期
    	 * @param date
    	 * @return
    	 */
    	public static Date str2Date(String date) {
        
    		if (StringUtils.isNotBlank(date)) {
        
    			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    			try {
        
    				return sdf.parse(date);
    			} catch (ParseException e) {
        
    				e.printStackTrace();
    			}
    			return new Date();
    		} else {
        
    			return null;
    		}
    	}
    
    	/**
    	 * 按照参数format的格式，日期转字符串
    	 * @param date
    	 * @param format
    	 * @return
    	 */
    	public static String date2Str(Date date, String format) {
        
    		if (null == format) {
        
    			format = "yyyy-MM-dd";
    		}
    		if (date != null) {
        
    			SimpleDateFormat sdf = new SimpleDateFormat(format);
    			return sdf.format(date);
    		} else {
        
    			return "";
    		}
    	}
    
    	/**
    	 * 把时间根据时、分、秒转换为时间段
    	 * @param StrDate
    	 */
    	public static String getTimes(String StrDate) {
        
    		String resultTimes = "";
    
    		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		java.util.Date now;
    
    		try {
        
    			now = new Date();
    			java.util.Date date = df.parse(StrDate);
    			long times = now.getTime() - date.getTime();
    			long day = times / (24 * 60 * 60 * 1000);
    			long hour = (times / (60 * 60 * 1000) - day * 24);
    			long min = ((times / (60 * 1000)) - day * 24 * 60 - hour * 60);
    			long sec = (times / 1000 - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
    
    			StringBuffer sb = new StringBuffer();
    			// sb.append("发表于：");
    			if (hour > 0) {
        
    				sb.append(hour + "小时前");
    			} else if (min > 0) {
        
    				sb.append(min + "分钟前");
    			} else {
        
    				sb.append(sec + "秒前");
    			}
    
    			resultTimes = sb.toString();
    		} catch (ParseException e) {
        
    			e.printStackTrace();
    		}
    
    		return resultTimes;
    	}
    
    	public static String getTimestamp() {
        
    		return String.valueOf(System.currentTimeMillis() / 1000);
    	}
    }