Java项目:在线电子书小说阅读系统(java+Layui+Springboot+Maven+mysql+HTML+FTP)

package zl.readCloud.utils; import org.springframework.stereotype.Component; import org.springframework.util.StringUtils; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.*; /** * @author ZhangLei * @Description: 日期工具类 * @date 2021/11/15 10:48 */ @Component public class DateUtils { /** * 获得当前日期 yyyy-MM-dd HH:mm:ss.SSS * * @return 2019-08-27 14:12:40.019 */ public static String getCurrentTime() { // 小写的hh取得12小时，大写的HH取的是24小时 SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); Date date = new Date(); return df.format(date); } /** * 获取系统当前时间戳 * * @return 1566889186583 */ public static String getSystemTime() { String current = String.valueOf(System.currentTimeMillis()); return current; } /** * 获取当前日期 yy-MM-dd * * @return 2019-08-27 */ public static String getDateByString() { Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); return sdf.format(date); } /** * 得到两个时间差 格式yyyy-MM-dd HH:mm:ss * * @param start 2019-06-27 14:12:40 * @param end 2019-08-27 14:12:40 * @return 5270400000 */ public static long dateSubtraction(String start, String end) { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); try { Date date1 = df.parse(start); Date date2 = df.parse(end); return date2.getTime() - date1.getTime(); } catch (ParseException e) { e.printStackTrace(); return 0; } } /** * 得到两个时间差 * * @param start 开始时间 * @param end 结束时间 * @return */ public static long dateTogether(Date start, Date end) { return end.getTime() - start.getTime(); } /** * 转化long值的日期为yyyy-MM-dd HH:mm:ss.SSS格式的日期 * * @param millSec 日期long值 5270400000 * @return 日期，以yyyy-MM-dd HH:mm:ss.SSS格式输出 1970-03-03 08:00:00.000 */ public static String transferLongToDate(String millSec) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS"); Date date = new Date(Long.parseLong(millSec)); return sdf.format(date); } /** * 获得当前日期 yyyy-MM-dd HH:mm:ss * * @return */ public static String getOkDate(String date) { try { if (StringUtils.isEmpty(date)) { return null; } Date date1 = new SimpleDateFormat("EEE MMM dd HH:mm:ss Z yyyy", Locale.ENGLISH).parse(date); //格式化 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sdf.format(date1); } catch (Exception e) { e.printStackTrace(); } return null; } /** * 获取当前日期是一个星期的第几天 * * @return 2 */ public static int getDayOfWeek() { Calendar cal = Calendar.getInstance(); cal.setTime(new Date()); return cal.get(Calendar.DAY_OF_WEEK) - 1; } /** * 判断当前时间是否在[startTime, endTime]区间，注意时间格式要一致 * * @param nowTime 当前时间 * @param dateSection 时间区间 2018-01-08,2019-09-09 * @return * @author jqlin */ public static boolean isEffectiveDate(Date nowTime, String dateSection) { try { String[] times = dateSection.split(","); String format = "yyyy-MM-dd"; Date startTime = new SimpleDateFormat(format).parse(times[0]); Date endTime = new SimpleDateFormat(format).parse(times[1]); if (nowTime.getTime() == startTime.getTime() || nowTime.getTime() == endTime.getTime()) { return true; } Calendar date = Calendar.getInstance(); date.setTime(nowTime); Calendar begin = Calendar.getInstance(); begin.setTime(startTime); Calendar end = Calendar.getInstance(); end.setTime(endTime); if (isSameDay(date, begin) || isSameDay(date, end)) { return true; } if (date.after(begin) && date.before(end)) { return true; } else { return false; } } catch (Exception e) { e.printStackTrace(); return false; } } public static boolean isSameDay(Calendar cal1, Calendar cal2) { if (cal1 != null && cal2 != null) { return cal1.get(0) == cal2.get(0) && cal1.get(1) == cal2.get(1) && cal1.get(6) == cal2.get(6); } else { throw new IllegalArgumentException("The date must not be null"); } } public static long getTimeByDate(String time) { SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); try { Date date = format.parse(time); //日期转时间戳（毫秒） return date.getTime(); } catch (Exception e) { e.printStackTrace(); return 0; } } /** * 获取当前小时 ：2019-08-23 17 * * @return 2019-08-27 17 */ public static String getCurrentHour() { GregorianCalendar calendar = new GregorianCalendar(); int hour = calendar.get(Calendar.HOUR_OF_DAY); if (hour < 10) { return DateUtils.getCurrentTime() + " 0" + hour; } return DateUtils.getDateByString() + " " + hour; } /** * 获取当前时间一个小时前 * * @return 2019-08-27 16 */ public static String getCurrentHourBefore() { GregorianCalendar calendar = new GregorianCalendar(); int hour = calendar.get(Calendar.HOUR_OF_DAY); if (hour > 0) { hour = calendar.get(Calendar.HOUR_OF_DAY) - 1; if (hour < 10) { return DateUtils.getDateByString() + " 0" + hour; } return DateUtils.getDateByString() + " " + hour; } //获取当前日期前一天 return DateUtils.getBeforeDay() + " " + 23; } /** * 获取当前日期前一天 * * @return 2019-08-26 */ public static String getBeforeDay() { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Date date = new Date(); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.DAY_OF_MONTH, -1); date = calendar.getTime(); return sdf.format(date); } /** * 获取最近七天 * * @return 2019-08-20 */ public static String getServen() { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar c = Calendar.getInstance(); c.add(Calendar.DATE, -7); Date monday = c.getTime(); String preMonday = sdf.format(monday); return preMonday; } /** * 获取最近一个月 * * @return 2019-07-27 */ public static String getOneMonth() { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar c = Calendar.getInstance(); c.add(Calendar.MONTH, -1); Date monday = c.getTime(); String preMonday = sdf.format(monday); return preMonday; } /** * 获取最近三个月 * * @return 2019-05-27 */ public static String getThreeMonth() { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Calendar c = Calendar.getInstance(); c.add(Calendar.MONTH, -3); Date monday = c.getTime()