基于java+SSM小说阅读网站的设计与实现-毕业设计源码+数据库+使用文档（高分优秀项目）.zip

package com.xnnovel.xy.utils; import org.springframework.util.StringUtils; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * 日期工具类 * * @author：Mr.Yang * @date：2018/9/13 20:50 */ public class DateUtils { public static final String DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss"; public static final String MINUTE_PATTERN = "yyyy-MM-dd HH:mm"; public static final String HOUR_PATTERN = "yyyy-MM-dd HH:mm:ss"; public static final String DATE_PATTERN = "yyyy-MM-dd"; public static final String MONTH_PATTERN = "yyyy-MM"; public static final String MONTH_PATTERN_CHINA = "yyyy年MM月"; public static final String YEAR_PATTERN = "yyyy"; public static final String MINUTE_ONLY_PATTERN = "mm"; public static final String HOUR_ONLY_PATTERN = "HH"; public static final String MONTH_DAY_PATTREN = "MMdd"; //以下参数用来计算几秒前，几分钟前。 private static final long ONE_MINUTE = 60000L; private static final long ONE_HOUR = 3600000L; private static final long ONE_DAY = 86400000L; private static final long ONE_WEEK = 604800000L; private static final String ONE_SECOND_AGO = "秒前"; private static final String ONE_MINUTE_AGO = "分钟前"; private static final String ONE_HOUR_AGO = "小时前"; private static final String ONE_DAY_AGO = "天前"; private static final String ONE_MONTH_AGO = "月前"; private static final String ONE_YEAR_AGO = "年前"; /** * 日期相加减天数 * * @param date 如果为Null，则为当前时间 * @param days 加减天数 * @param includeTime 是否包括时分秒,true表示包含 * @return * @throws ParseException */ public static Date dateAdd(Date date, int days, boolean includeTime) throws ParseException { if (date == null) { date = new Date(); } if (!includeTime) { SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.DATE_PATTERN); date = sdf.parse(sdf.format(date)); } Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.DATE, days); return cal.getTime(); } /** * 时间格式化成字符串 * * @param date Date * @param pattern StrUtils.DATE_TIME_PATTERN || StrUtils.DATE_PATTERN， 如果为空，则为yyyy-MM-dd * @return * @throws ParseException */ public static String dateFormat(Date date, String pattern) { if (StringUtils.isEmpty(pattern)) { pattern = DateUtils.DATE_PATTERN; } SimpleDateFormat sdf = new SimpleDateFormat(pattern); return sdf.format(date); } /** * 字符串解析成时间对象 * * @param dateTimeString String * @param pattern StrUtils.DATE_TIME_PATTERN || StrUtils.DATE_PATTERN，如果为空，则为yyyy-MM-dd * @return * @throws ParseException */ public static Date dateParse(String dateTimeString, String pattern) throws ParseException { if (StringUtils.isEmpty(pattern)) { pattern = DateUtils.DATE_PATTERN; } SimpleDateFormat sdf = new SimpleDateFormat(pattern); return sdf.parse(dateTimeString); } /** * 将日期时间格式成只有日期的字符串（可以直接使用dateFormat，Pattern为Null进行格式化） * * @param dateTime Date * @return * @throws ParseException */ public static String dateTimeToDateString(Date dateTime) throws ParseException { String dateTimeString = DateUtils.dateFormat(dateTime, DateUtils.DATE_TIME_PATTERN); return dateTimeString.substring(0, 10); } /** * 当时、分、秒为00:00:00时，将日期时间格式成只有日期的字符串， * 当时、分、秒不为00:00:00时，直接返回 * * @param dateTime Date * @return * @throws ParseException */ public static String dateTimeToDateStringIfTimeEndZero(Date dateTime) throws ParseException { String dateTimeString = DateUtils.dateFormat(dateTime, DateUtils.DATE_TIME_PATTERN); if (dateTimeString.endsWith("00:00:00")) { return dateTimeString.substring(0, 10); } else { return dateTimeString; } } /** * 将日期时间格式成日期对象，和dateParse互用 * * @param dateTime Date * @return Date * @throws ParseException */ public static Date dateTimeToDate(Date dateTime) throws ParseException { Calendar cal = Calendar.getInstance(); cal.setTime(dateTime); cal.set(Calendar.HOUR_OF_DAY, 0); cal.set(Calendar.MINUTE, 0); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MILLISECOND, 0); return cal.getTime(); } /** * 时间加减小时 * * @param startDate 要处理的时间，Null则为当前时间 * @param hours 加减的小时 * @return Date */ public static Date dateAddHours(Date startDate, int hours) { if (startDate == null) { startDate = new Date(); } Calendar c = Calendar.getInstance(); c.setTime(startDate); c.set(Calendar.HOUR, c.get(Calendar.HOUR) + hours); return c.getTime(); } /** * 时间加减分钟 * * @param startDate 要处理的时间，Null则为当前时间 * @param minutes 加减的分钟 * @return */ public static Date dateAddMinutes(Date startDate, int minutes) { if (startDate == null) { startDate = new Date(); } Calendar c = Calendar.getInstance(); c.setTime(startDate); c.set(Calendar.MINUTE, c.get(Calendar.MINUTE) + minutes); return c.getTime(); } /** * 时间加减秒数 * * @param startDate 要处理的时间，Null则为当前时间 * @param seconds 加减的秒数 * @return */ public static Date dateAddSeconds(Date startDate, int seconds) { if (startDate == null) { startDate = new Date(); } Calendar c = Calendar.getInstance(); c.setTime(startDate); c.set(Calendar.SECOND, c.get(Calendar.SECOND) + seconds); return c.getTime(); } /** * 时间加减天数 * * @param startDate 要处理的时间，Null则为当前时间 * @param days 加减的天数 * @return Date */ public static Date dateAddDays(Date startDate, int days) { if (startDate == null) { startDate = new Date(); } Calendar c = Calendar.getInstance(); c.setTime(startDate); c.set(Calendar.DATE, c.get(Calendar.DATE) + days); return c.getTime(); } /** * 时间加减月数 * * @param startDate 要处理的时间，Null则为当前时间 * @param months 加减的月数 * @return Date */ public static Date dateAddMonths(Date startDate, int months) { if (startDate == null) { startDate = new Date(); } Calendar c = Calendar.getInstance(); c.setTime(startDate); c.set(Calendar.MONTH, c.get(Calendar.MONTH) + months); return c.getTime(); } /** * 时间加减年数 * * @param startDate 要处理的时间，Null则为当前时间 * @param years 加减的年数 * @return Date */ public static Date dateAddYears(Date startDate, int years) { if (startDate == null) { startDate = new Date(); } Calendar c = Calendar.getInst