Java日期工具类的封装详解

import org.apache.commons.lang3.StringUtils; import java.lang.management.ManagementFactory; import java.text.ParseException; import java.text.SimpleDateFormat; import java.time.LocalDate; import java.time.LocalDateTime; import java.time.YearMonth; import java.time.ZoneId; import java.util.*; import java.util.regex.Pattern; /** * 常用日期工具类 * * @author compass * @date 2022/10/21 14:20 * @since 1.0.0 **/ public class DateTools { public final static String DEFAULT_TIME_FORMAT = "HH:mm:ss"; public final static String DEFAULT_DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss"; public final static String DEFAULT_DATE_FORMAT_SHORT = "yyMMdd"; public final static String DEFAULT_YEAR_MODTH_SHORT = "yyyyMM"; public final static String DEFAULT_TIME_FORMAT_SHORT = "HHmmss"; public final static String DEFAULT_DATETIME_FORMAT_SHORT = "yyMMddHHmmss"; public final static String DEFAULT_DATE_FORMAT_ALLSHORT = "yyyyMMdd"; public static final String SIMPLE_DATE_STR = "yyyy-MM-dd"; public static final String FULL_DATE_STR = "yyyy-MM-dd HH:mm:ss"; public static final String ALL_FULL_DATE_STR = "yyyy-MM-dd HH:mm:ss.S"; public static final String PART_DATE_STR = "yyyy-MM-dd HH:mm"; public static final String DATEFORMAT_Y2H = "yyyy-MM-dd HH"; public static final String SIMPLE_RULE_DATE_STR = "yyyy/MM/dd"; public static final String FULL_RULE_DATE_STR = "yyyy/MM/dd HH:mm:ss"; public static final String PART_RULE_DATE_STR = "yyyy/MM/dd HH:mm"; public static final String SMALL_PART_RULE_DATE_STR = "HH:mm"; public static final String DATE_FORMAT_YYYYMMDD = "yyyyMMdd"; public static final String DATE_FORMAT_YYYYMMDDHH = "yyyyMMddHH"; public static final String DATE_FORMAT_YYYYMMDDHHMM = "yyyyMMddHHmm"; public static final String DATE_FORMAT_YYYYMMDDHHMMSS = "yyyyMMddHHmmss"; public static final String SIMPLE_POINT_DATE_STR = "yyyy.MM.dd"; public static final String FULL_POINT_DATE_STR = "yyyy.MM.dd HH:mm:ss"; /** * 锁对象 */ private static final Object lockObj = new Object(); /** * 存放不同格式的线程安全的SimpleDateFormat */ private static Map> sdfMap = new HashMap<>(); public enum DateType { YEAR("YEAR", 1), MONTH("MONTH", 2), DAY("DAY", 3), HOUR("HOUR", 4), MINUTE("MINUTE", 5), SECOND("SECOND", 6); private String name; private int value; DateType(String name, int value) { this.value = value; this.name = name; } public int getValue() { return value; } public String getName() { return name; } } /** * 返回一个ThreadLocal的sdf,每个线程只会new一次sdf * * @param pattern * @return */ private static SimpleDateFormat getSdf(final String pattern) { ThreadLocal tl = sdfMap.get(pattern); if (tl == null) { synchronized (lockObj) { tl = sdfMap.get(pattern); if (tl == null) { tl = ThreadLocal.withInitial(() -> new SimpleDateFormat(pattern)); sdfMap.put(pattern, tl); } } } return tl.get(); } private static String[] supportFmt = new String[]{ALL_FULL_DATE_STR, SIMPLE_DATE_STR,DATE_FORMAT_YYYYMMDDHHMMSS, DEFAULT_YEAR_MODTH_SHORT, DEFAULT_TIME_FORMAT, DEFAULT_DATE_FORMAT_SHORT}; private static String checkFmt(String datestr) { if (datestr == null) return null; int len = datestr.length(); if (len == 0) return null; String fmt; switch (len) { case 19: fmt = supportFmt[0]; break; case 10: fmt = supportFmt[1]; break; case 14: fmt = supportFmt[2]; break; case 6: fmt = supportFmt[3]; break; case 8: { if (datestr.indexOf(":") > 0) { fmt = supportFmt[4]; } else { fmt = supportFmt[5]; } } break; default: return null; } return fmt; } /** * 日期格式，正则表达式 */ private static String[] supportFmtPattern = new String[]{ "\\d{4}\\-\\d{1,2}\\-\\d{1,2}", "yyyy-MM-dd", "\\d{4}-\\d{1,2}-\\d{1,2}\\s+\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy-MM-dd HH:mm:ss", "\\d{1,2}:\\d{1,2}:\\d{1,2}", "HH:mm:ss", "\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}", "HH:mm:ss.SSS", "\\d{4}年\\d{1,2}月\\d{1,2}日", "yyyy年MM月dd日", "\\d{4}-\\d{1,2}-\\d{1,2}\\s+\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}", "yyyy-MM-dd HH:mm:ss.SSS", "\\d{4}(10|11|12|0[1-9])(30|31|[1-2][0-9]|0[1-9])(20|21|22|23|1[0-9]|0[0-9])([1-5][0-9]|0[0-9])([1-5][0-9]|0[0-9])", "yyyyMMddHHmmss", "\\d{4}(10|11|12|0[1-9])(30|31|[1-2][0-9]|0[1-9])", "yyyyMMdd", "\\d{4}(10|11|12|0[1-9])(30|31|[1-2][0-9]|0[1-9])(20|21|22|23|1[0-9]|0[0-9])([1-5][0-9]|0[0-9])([1-5][0-9]|0[0-9])\\d{1,3}", "yyyyMMddHHmmssSSS", "\\d{4}(10|11|12|0[1-9])", "yyyyMM", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}", "yyyy/MM/dd", "\\d{4}\\.\\d{1,2}\\.\\d{1,2}", "yyyy.MM.dd", "\\d{1,2}\\-\\d{1,2}\\-\\d{4}", "MM-dd-yyyy", "\\d{1,2}\\/\\d{1,2}\\/\\d{4}", "MM/dd/yyyy", "\\d{1,2}\\/\\d{1,2}\\/\\d{2}", "MM/dd/yy", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy/MM/dd'T'HH:mm:ss", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy/MM/dd't'HH:mm:ss", "\\d{4}-\\d{1,2}-\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy-MM-dd'T'HH:mm:ss", "\\d{4}-\\d{1,2}-\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy-MM-dd't'HH:mm:ss", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}Z", "yyyy/MM/dd'T'HH:mm:ss.SSS'Z'", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}z", "yyyy/MM/dd't'HH:mm:ss.SSS'z'", "\\d{4}-\\d{1,2}-\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}Z", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", "\\d{4}-\\d{1,2}-\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}z", "yyyy-MM-dd't'HH:mm:ss.SSS'z'" }; /** * 日期格式，正则表达式 */ private static String[] supportDateFmtPattern = new String[]{ "\\d{4}\\-\\d{1,2}\\-\\d{1,2}", "yyyy-MM-dd", "\\d{4}年\\d{1,2}月\\d{1,2}日", "yyyy年MM月dd日", "\\d{4}(10|11|12|0[1-9])(30|31|[1-2][0-9]|0[1-9])", "yyyyMMdd", "\\d{4}(10|11|12|0[1-9])", "yyyyMM", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}", "yyyy/MM/dd", "\\d{4}\\.\\d{1,2}\\.\\d{1,2}", "yyyy.MM.dd", "\\d{1,2}\\-\\d{1,2}\\-\\d{4}", "MM-dd-yyyy", "\\d{1,2}\\/\\d{1,2}\\/\\d{4}", "MM/dd/yyyy", "\\d{1,2}\\/\\d{1,2}\\/\\d{2}", "MM/dd/yy" }; /** * 时间格式，正则表达式 */ private static String[] supportTimeFmtPattern = new String[]{ "\\d{4}-\\d{1,2}-\\d{1,2}\\s+\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy-MM-dd HH:mm:ss", "\\d{1,2}:\\d{1,2}:\\d{1,2}", "HH:mm:ss", "\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}", "HH:mm:ss.SSS", "\\d{4}-\\d{1,2}-\\d{1,2}\\s+\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}", "yyyy-MM-dd HH:mm:ss.SSS", "\\d{4}(10|11|12|0[1-9])(30|31|[1-2][0-9]|0[1-9])(20|21|22|23|1[0-9]|0[0-9])([1-5][0-9]|0[0-9])([1-5][0-9]|0[0-9])", "yyyyMMddHHmmss", "\\d{4}(10|11|12|0[1-9])(30|31|[1-2][0-9]|0[1-9])(20|21|22|23|1[0-9]|0[0-9])([1-5][0-9]|0[0-9])([1-5][0-9]|0[0-9])\\d{1,3}", "yyyyMMddHHmmssSSS", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy/MM/dd'T'HH:mm:ss", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy/MM/dd't'HH:mm:ss", "\\d{4}-\\d{1,2}-\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy-MM-dd'T'HH:mm:ss", "\\d{4}-\\d{1,2}-\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}", "yyyy-MM-dd't'HH:mm:ss", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}Z", "yyyy/MM/dd'T'HH:mm:ss.SSS'Z'", "\\d{4}\\/\\d{1,2}\\/\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}z", "yyyy/MM/dd't'HH:mm:ss.SSS'z'", "\\d{4}-\\d{1,2}-\\d{1,2}T\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}Z", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", "\\d{4}-\\d{1,2}-\\d{1,2}t\\d{1,2}:\\d{1,2}:\\d{1,2}\\.\\d{1,3}z", "yyyy-MM-dd't'HH:mm:ss.SSS'z'" }; /** * 根据日期时间串推断日期格式 * * @param datestr 日期字符串 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String checkFmtByPattern(String datestr) { if (datestr == null) return null; for (int i = 0; i  * yyyy-MM-dd HH:mm:ss.SSS 
 * yyyy-MM-dd HH:mm:ss 
 * yyyy-MM-dd 
 * yyyy.MM.dd 
 * yyyy/MM/dd 
 * HH:mm:ss.SSS 
 * HH:mm:ss 
 * yyyyMMdd 
 * yyyyMMddHHmmssSSS 
 * yyyyMMddHHmmss 
 * yyyyMM 
 * * @param datestr * @return */ public static Date parse(String datestr) { String fmt = checkFmtByPattern(datestr); return parse(datestr, fmt); } /** * 获取yyyy-MM-dd日期类型 * * @param dateStr 日期字符串 * @param fmt     日期格式 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Date parse(String dateStr, String fmt) { try { return getSdf(fmt).parse(dateStr); } catch (NullPointerException | ParseException e) { throw new RuntimeException(String.format("不支持的时间格式，[%s]", dateStr)); } } /** * 获取yyyy-MM-dd日期类型 * * @param datestr 日期字符串 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Date parseDay(String datestr) { try { return getSdf(supportFmt[1]).parse(datestr); } catch (ParseException e) { throw new RuntimeException("不支持的时间格式"); } } /** * 获取yyyy-MM-dd HH:mm:ss日期类型 * * @param datestr 日期字符串 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Date parseDayTime(String datestr) { try { return getSdf(supportFmt[0]).parse(datestr); } catch (ParseException e) { throw new RuntimeException("不支持的时间格式"); } } /** * 将日期格式化成指定格式 * * @param dt 日期 * @param dt 格式字符串 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String format(Date dt, String... pattern) { if (pattern != null && pattern.length > 1) { throw new RuntimeException("日期格式字符串，只支持一个"); } String format = pattern.length <= 0 ?DEFAULT_DATETIME_FORMAT : pattern[0]; return getSdf(format).format(dt); } /** * 将日期格式化为yyyy-MM-dd HH:mm:ss * * @param dt 日期 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String formatDayTime(Date dt) { return getSdf(supportFmt[0]).format(dt); } /** * 将日期格式化为yyyy-MM-dd * * @param dt 开日期 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String formatDay(Date dt) { return getSdf(supportFmt[1]).format(dt); } /** * 将日期格式化为HH:mm:ss * * @param dt 开日期 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String formatTime(Date dt) { return getSdf(supportFmt[4]).format(dt); } /** * 计算月份差[日期型]，按月份计算忽略天数 * * @param fromDate 开始日期 * @param toDate   结束日期 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Integer monthBetween(Date fromDate, Date toDate) { if ((fromDate == null) || (toDate == null)) { return null; } int times = 1; if (!fromDate.after(toDate)) { Calendar calFrom = Calendar.getInstance(); Calendar calTo = Calendar.getInstance(); calFrom.setTime(fromDate); calFrom.set(Calendar.DAY_OF_MONTH, 1); calTo.setTime(toDate); calTo.set(Calendar.DAY_OF_MONTH, 1); while (calFrom.before(calTo)) { calFrom.add(2, 1); times++; } } else { return 0; } return times; } /** * 计算月份差(字符型)，自动判定格式 * * @param fromDate 开始日期 * @param toDate   结束日期 * @return java.lang.Integer * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Integer monthBetween(String fromDate, String toDate) { if ((fromDate == null) || (toDate == null)) { return null; } return monthBetween(parse(fromDate), parse(toDate)); } /** * 计算天数差 * * @param from 开始日期 * @param end  结束日期 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Integer daysBetween(Date from, Date end) { if ((from == null) || (end == null)) { return null; } long fromL = from.getTime(); long endL = end.getTime(); double diff = (endL - fromL) / 86400000L; return new Integer(new Double(Math.ceil(diff)).intValue()); } /** * 计算天数差 * * @param from 开始日期 * @param end  结束日期 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Integer dayBetween(String from, String end) { if ((from == null) || (end == null)) { return null; } return daysBetween(parse(from), parse(end)); } /** * 日期年月加减 +天 * * @param date 日期 * @param adds 天数 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Date addDay(Date date, int adds) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.DATE, adds); return cal.getTime(); } /** * 日期字符串年月加减 +天 * * @param date 日期字符串 * @param adds 天数 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String addDay(String date, int adds) { String fmt = checkFmtByPattern(date); Date r = addDay(parse(date), adds); return format(r, fmt); } /** * 日期年月加减 +月 * * @param date 日期 * @param adds 天数 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Date addMonth(Date date, int adds) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.MONTH, adds); return cal.getTime(); } /** * 日期年月加减 +月 * * @param date 日期字符串 * @param adds 天数 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String addMonth(String date, int adds) { String fmt = checkFmtByPattern(date); Date r = addMonth(parse(date), adds); return format(r, fmt); } /** * 日期年月加减 +年 * * @param date 日期 * @param adds 天数 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static Date addYear(Date date, int adds) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.YEAR, adds); return cal.getTime(); } /** * 日期年月加减 +年 * * @param date 日期字符串 * @param adds 天数 * @return java.util.Date * @author compass * @date 2022/10/21 11:06 * @since 1.0.0 **/ public static String addYear(String date, int adds) { String fmt = checkFmtByPattern(date); Date r = addYear(parse(date), adds); return format(r, fmt); } /** * 返回当前日期 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static Date getNowDate() { return new Date(); } /** * 返回当前日期字符串 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static String getNowStr(String format) { return getSdf(format).format(new Date()); } /** * 返回当前年 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static int getNowYear() { Calendar calendar = Calendar.getInstance(); return calendar.get(Calendar.YEAR); } /** * 返回当前月 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static int getNowMonth() { Calendar calendar = Calendar.getInstance(); return calendar.get(Calendar.MONTH); } /** * 获取今天是多少号 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static int getNowDay() { Calendar calendar = Calendar.getInstance(); return calendar.get(Calendar.DAY_OF_MONTH); } /** * 返回当前日期是今年的第几天 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static int getNowDayOfYear() { Calendar calendar = Calendar.getInstance(); return calendar.get(Calendar.DAY_OF_YEAR); } /** * 获取今天是星期几 * * @return java.util.Date * @author compass * @date 2022/10/21 11:10 * @since 1.0.0 **/ public static int getNowDayOfWeek() { Calendar calendar = Calendar.getInstance(); return calendar.get(Calendar.DAY_OF_WEEK) - 1; } /** * 获取日期字符串的某一个时间单位 * * @param dateStr 日期字符串 * @param format  日期格式化模式 默认：yyyy/MM/dd * @param unit    获取的日期单位 * @return int * @author compass * @date 2022/9/14 * @since 1.0.0 **/ public static int getDateUnit(String dateStr, String format, DateTools.DateType unit) { int type = unit.getValue(); format = StringUtils.isNotBlank(format) ? format : DEFAULT_DATETIME_FORMAT; SimpleDateFormat sdf = new SimpleDateFormat(format); Calendar startCalendar = Calendar.getInstance(); Date dateTime = null; try { dateTime = sdf.parse(dateStr); } catch (ParseException e) { e.printStackTrace(); throw new RuntimeException("日期格式错误"); } startCalendar.setTime(dateTime); int year = startCalendar.get(Calendar.YEAR); int month = startCalendar.get(Calendar.MONTH) + 1; int day = startCalendar.get(Calendar.DAY_OF_MONTH); int hour = startCalendar.get(Calendar.HOUR_OF_DAY); int minute = startCalendar.get(Calendar.MINUTE); int second = startCalendar.get(Calendar.SECOND); switch (type) { case 1: return year; case 2: return month; case 3: return day; case 4: return hour; case 5: return minute; case 6: return second; default: throw new RuntimeException("日期单位不正确"); } } /** * 计算距离生日还有多少天 * * @param date：生日日期 * @param format：日期格式 默认：yyyy-MM-dd */ public static int getBirthDay(String date, String... format) { if (format != null && format.length > 1) { throw new RuntimeException("日期格式字符串，只支持一个"); } int days = 0; try { SimpleDateFormat myFormatter = new SimpleDateFormat(format.length <= 0 ? "yyyy-MM-dd" : format[0]); String cliDate = date; Calendar cToday = Calendar.getInstance(); // 存今天 Calendar cBirth = Calendar.getInstance(); // 存生日 cBirth.setTime(myFormatter.parse(cliDate)); // 设置生日 cBirth.set(Calendar.YEAR, cToday.get(Calendar.YEAR)); // 修改为本年 if (cBirth.get(Calendar.DAY_OF_YEAR)  1) { throw new RuntimeException("日期格式字符串，只支持一个"); } long time = ManagementFactory.getRuntimeMXBean().getStartTime(); return format(new Date(time), format.length <= 0 ? DEFAULT_DATETIME_FORMAT : format[0]); } /** * 格式化时间 * * @param sec 秒 * @return java.lang.String * @author compass * @date 2022/10/21 14:46 * @since 1.0.0 **/ private static String NumFormat(long sec) { if (String.valueOf(sec).length() <2) { return "0" + sec; } else { return String.valueOf(sec); } } /** * 秒转小时分 * * @param second 秒 * @return java.lang.String * @author compass * @date 2022/10/21 14:46 * @since 1.0.0 **/ public static String getFormatTime(Long second) { if (second != null) { if (second <3600) {//分 return NumFormat(second / 60) + "分"; } if (second <3600 * 24) {>= 3600 * 24) {//天 return NumFormat(second / 60 / 60 / 24) + "天" + NumFormat(second / 60 / 60 % 24) + "小时" + NumFormat(second / 60 % 60) + "分"; } } return "--"; } /** * 获取当前时间前面某天或者后面某天 * * @param date   日期 * @param amount 相隔天数，正数表示未来日期，负数表示过去日期 * @return java.util.Date * @author compass * @date 2022/10/21 14:49 * @since 1.0.0 **/ public static Date getOtherDay(Date date, int amount) { Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.DAY_OF_MONTH, amount); Date time = calendar.getTime(); return time; } /** * 获取周几 * * @param date * @return */ public static String getWeek(Date date) { Calendar calendar = Calendar.getInstance(); calendar.setTime(date); int weekday = calendar.get(Calendar.DAY_OF_WEEK); String week = null; if (weekday == 1) { week = "星期天"; } else if (weekday == 2) { week = "星期一"; } else if (weekday == 3) { week = "星期二"; } else if (weekday == 4) { week = "星期三"; } else if (weekday == 5) { week = "星期四"; } else if (weekday == 6) { week = "星期五"; } else if (weekday == 7) { week = "星期六"; } return week; } /** * 判断是不是本周 * * @param date 日期 * @return boolean * @author compass * @date 2022/10/21 14:54 * @since 1.0.0 **/ public static boolean isThisWeek(Date date) { Calendar calendar = Calendar.getInstance(); int currentWeek = calendar.get(Calendar.WEEK_OF_YEAR); calendar.setTime(date); int dateWeek = calendar.get(Calendar.WEEK_OF_YEAR); if (currentWeek == dateWeek) { return true; } return false; } /** * 判断是不是本周 * * @param date   日期 * @param format 日期格式字符 * @return boolean * @author compass * @date 2022/10/21 14:54 * @since 1.0.0 **/ public static boolean isThisWeek(String date, String format) { Calendar calendar = Calendar.getInstance(); int currentWeek = calendar.get(Calendar.WEEK_OF_YEAR); calendar.setTime(parse(date, format)); int dateWeek = calendar.get(Calendar.WEEK_OF_YEAR); if (currentWeek == dateWeek) { return true; } return false; } /** * 判断当前时间 * * @param date   日期 * @param format 日期格式 * @return boolean * @author compass * @date 2022/10/21 15:01 * @since 1.0.0 **/ private static boolean isThisTime(Date date, String format) { SimpleDateFormat sdf = new SimpleDateFormat(format); String dateFormat = sdf.format(date); String nowFormat = sdf.format(new Date()); if (dateFormat.equals(nowFormat)) { return true; } return false; } /** * 判断是否是当天 * * @param date 日期 * @return boolean * @author compass * @date 2022/10/21 15:01 * @since 1.0.0 **/ public static boolean isThisDay(Date date) { return isThisTime(date, "YYYY-MM-dd"); } /** * 判断是否是本月 * * @param date 日期 * @return boolean * @author compass * @date 2022/10/21 15:01 * @since 1.0.0 **/ public static boolean isThisMonth(Date date) { return isThisTime(date, "YYYY-MM-dd"); } /** * 获取某月开始时间 * * @param date 日期 * @return java.time.LocalDateTime * @author compass * @date 2022/10/21 16:57 * @since 1.0.0 **/ public static LocalDateTime getMonthBeginTime(Date date) { LocalDateTime localDateTime = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime(); YearMonth yearMonth = YearMonth.of(localDateTime.getYear(), localDateTime.getMonth()); LocalDate localDate = yearMonth.atDay(1); return localDate.atStartOfDay(); } /** * 获取某月开始时间 * * @param date 日期字符串 * @return java.time.LocalDateTime * @author compass * @date 2022/10/21 16:57 * @since 1.0.0 **/ public static LocalDateTime getMonthBeginTime(String date) { return getMonthBeginTime(parse(date)); } /** * 获取某月结束时间 * * @param date 日期 * @return java.time.LocalDateTime * @author compass * @date 2022/10/21 16:57 * @since 1.0.0 **/ public static LocalDateTime getMonthEndTime(Date date) { LocalDateTime localDateTime = date.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime(); YearMonth yearMonth = YearMonth.of(localDateTime.getYear(), localDateTime.getMonth()); LocalDate endOfMonth = yearMonth.atEndOfMonth(); return endOfMonth.atTime(23, 59, 59, 999); } /** * 获取某月结束时间 * * @param date 日期字符串 * @return java.time.LocalDateTime * @author compass * @date 2022/10/21 16:57 * @since 1.0.0 **/ public static LocalDateTime getMonthEndTime(String date) { return getMonthEndTime(parse(date)); } /** * 获取指定时间范围内的所有日期[date] * @param dBegin 开始日期 * @param dEnd 结束日期 * @return java.util.List * @author compass * @date 2022/10/21 17:11 * @since 1.0.0 **/ public static List findBetweenAll(Date dBegin, Date dEnd) { List dateList = new ArrayList<>(); Calendar calBegin = Calendar.getInstance(); // 使用给定的 Date 设置此 Calendar 的开始时间 calBegin.setTime(dBegin); Calendar calEnd = Calendar.getInstance(); // 使用给定的 Date 设置此 Calendar 的结束时间 calEnd.setTime(dEnd); // 测试此日期是否在指定日期之后 while (dEnd.after(calBegin.getTime())) { // 根据日历的规则，为给定的日历字段添加或减去指定的时间量 calBegin.add(Calendar.DAY_OF_MONTH, 1); dateList.add(calBegin.getTime()); } return dateList; } /** * 获取指定时间范围内的所有日期[字符串] * @param dBegin 开始日期 * @param dEnd 结束日期 * @param format 日期格式字符串 * @return java.util.List * @author compass * @date 2022/10/21 17:11 * @since 1.0.0 **/ public static List findBetweenAll(String dBegin, String dEnd,String format) { Date tempEndDate = parse(dEnd); List dateList = new ArrayList<>(); Calendar calBegin = Calendar.getInstance(); // 使用给定的 Date 设置此 Calendar 的开始时间 calBegin.setTime(parse(dBegin)); Calendar calEnd = Calendar.getInstance(); // 使用给定的 Date 设置此 Calendar 的结束时间 calEnd.setTime(tempEndDate); // 测试此日期是否在指定日期之后 while (tempEndDate.after(calBegin.getTime())) { // 根据日历的规则，为给定的日历字段添加或减去指定的时间量 calBegin.add(Calendar.DAY_OF_MONTH, 1); String date = format( calBegin.getTime(),format); dateList.add(date); } return dateList; } }