基于SpringBoot+Shiro+MyBatis+Redis+thymeleaf的在线考试系统源码.zip

package com.exam.util; import org.apache.commons.lang.StringUtils; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; import java.util.logging.Level; import java.util.logging.Logger; public class DateUtil { public final static long ONE_DAY_SECONDS = 86400; public final static String shortFormat = "yyyyMMdd"; public final static String longFormat = "yyyyMMddHHmmss"; public final static String concurrentFormat = "yyyyMMddHHmmssSSS"; public final static String shortConcurrentFormat = "yyMMddHHmmssSSS"; public final static String webFormat = "yyyy-MM-dd"; public final static String webMonthFormat = "yyyy-MM"; public final static String timeFormat = "HH:mm:ss"; public final static String monthFormat = "yyyyMM"; public final static String chineseDtFormat = "yyyy年MM月dd日"; public final static String chineseYMFormat = "yyyy年MM月"; public final static String newFormat = "yyyy-MM-dd HH:mm:ss"; public final static String noSecondFormat = "yyyy-MM-dd HH:mm"; public final static String MdFormat = "MM-dd"; public final static long ONE_DAY_MILL_SECONDS = 86400000; public static DateFormat getNewDateFormat(String pattern) { DateFormat df = new SimpleDateFormat(pattern); df.setLenient(false); return df; } public static String format(Date date, String format) { if (date == null) { return null; } return new SimpleDateFormat(format).format(date); } public static String format(String dateStr, String oldFormat, String newFormat) { if (dateStr == null) { return null; } String result = null; DateFormat oldDateFormat = new SimpleDateFormat(oldFormat); DateFormat newDateFormat = new SimpleDateFormat(newFormat); try { Date date = oldDateFormat.parse(dateStr); result = newDateFormat.format(date); } catch (ParseException e) { e.printStackTrace(); } return result; } public static Date parseDateNoTime(String sDate) { DateFormat dateFormat = new SimpleDateFormat(shortFormat); Date date = null; if ((sDate == null) || (sDate.length() < shortFormat.length())) { return null; } if (!StringUtils.isNumeric(sDate)) { return null; } try { date = dateFormat.parse(sDate); } catch (ParseException e) { e.printStackTrace(); } return date; } public static Date parseDateNoTime(String sDate, String format) throws ParseException { if (StringUtils.isBlank(format)) { throw new ParseException("Null format. ", 0); } DateFormat dateFormat = new SimpleDateFormat(format); if ((sDate == null) || (sDate.length() < format.length())) { throw new ParseException("length too little", 0); } return dateFormat.parse(sDate); } public static Date parseDateNoTimeWithDelimit(String sDate, String delimit) throws ParseException { sDate = sDate.replaceAll(delimit, ""); DateFormat dateFormat = new SimpleDateFormat(shortFormat); if ((sDate == null) || (sDate.length() != shortFormat.length())) { throw new ParseException("length not match", 0); } return dateFormat.parse(sDate); } public static Date parseDateLongFormat(String sDate) { DateFormat dateFormat = new SimpleDateFormat(longFormat); Date d = null; if ((sDate != null) && (sDate.length() == longFormat.length())) { try { d = dateFormat.parse(sDate); } catch (ParseException ex) { return null; } } return d; } public static Date parseDateNewFormat(String sDate) { DateFormat dateFormat = new SimpleDateFormat(newFormat); Date d = null; dateFormat.setLenient(false); if ((sDate != null) && (sDate.length() == newFormat.length())) { try { d = dateFormat.parse(sDate); } catch (ParseException ex) { return null; } } return d; } public static Date parseDateNoSecondFormat(String sDate) { DateFormat dateFormat = new SimpleDateFormat(noSecondFormat); Date d = null; dateFormat.setLenient(false); if ((sDate != null) && (sDate.length() == noSecondFormat.length())) { try { d = dateFormat.parse(sDate); } catch (ParseException ex) { return null; } } return d; } public static Date parseDateWebFormat(String sDate) { DateFormat dateFormat = new SimpleDateFormat(webFormat); Date d = null; dateFormat.setLenient(false); if ((sDate != null) && (sDate.length() == webFormat.length())) { try { d = dateFormat.parse(sDate); } catch (ParseException ex) { return null; } } return d; } public static Date parseDateWebMonthFormat(String sDate) { DateFormat dateFormat = new SimpleDateFormat(webMonthFormat); Date d = null; dateFormat.setLenient(false); if ((sDate != null) && (sDate.length() == webMonthFormat.length())) { try { d = dateFormat.parse(sDate); } catch (ParseException ex) { return null; } } return d; } /** * 计算当前时间几小时之后的时间 * * @param date * @param hours * * @return */ public static Date addHours(Date date, long hours) { return addMinutes(date, hours * 60); } /** * 计算当前时间几分钟之后的时间 * * @param date * @param minutes * * @return */ public static Date addMinutes(Date date, long minutes) { return addSeconds(date, minutes * 60); } /** * @param date1 * @param secs * * @return */ public static Date addSeconds(Date date1, long secs) { return new Date(date1.getTime() + (secs * 1000)); } /** * 判断输入的字符串是否为合法的小时 * * @param hourStr * * @return true/false */ public static boolean isValidHour(String hourStr) { if (!StringUtils.isEmpty(hourStr) && StringUtils.isNumeric(hourStr)) { int hour = new Integer(hourStr).intValue(); if ((hour >= 0) && (hour <= 23)) { return true; } } return false; } /** * 判断输入的字符串是否为合法的分或秒 * * @param minuteStr * * @return true/false */ public static boolean isValidMinuteOrSecond(String str) { if (!StringUtils.isEmpty(str) && StringUtils.isNumeric(str)) { int hour = new Integer(str).intValue(); if ((hour >= 0) && (hour <= 59)) { return true; } } return false; } /** * 取得新的日期 * * @param date1 * 日期 * @param days * 天数 * * @return 新的日期 */ public static Date addDays(Date date1, long days) { Calendar cal = Calendar.getInstance(); cal.setTime(date1); cal.add(Calendar.DATE, (int) days); return cal.getTime(); } public static String getTomorrowDateString(String sDate) throws ParseException { Date aDate = parseDateNoTime(sDate); aDate = addSeconds(aDate, ONE_DAY_SECONDS); return getDateString(aDate); } public static String getTomorrowDateNewFMTString(String sDate) throws ParseException { Date aDate = parseDateWebFormat(sDate); aDate = addDays(aDate, 1); return getWebDateString(aDate); } public static String getTomorrowDateNewFormatString(String sDate) throws ParseException { Date aDate = parseDateNewFormat(sDate); aDate = addDays(aDate, 1); return getWebDateString(aDate); } public static String getLongDateString(Date date) { DateFormat dateFormat = new SimpleDateFormat(longFormat); return getDateString(date, dateFormat); } public static String getNewFormatDateString(Date date) { DateFormat dateFormat = new SimpleDateFormat(newFormat); return getDateString(date, dateFormat); } public static String getWebFormatDateString(Date date) { DateFormat dateFormat = new SimpleDateFormat(webFormat); return getDateString(date, dateFormat); } public static String getConcurrentFormatDateString(Date date) { DateFormat dateFormat = new SimpleDateFormat(concurrentFormat); return getDateString(date, dateFormat); } public static String getDateString(Date date, DateFormat dateFormat) { if (date == null || dateFormat == null) { return null; } return dateFormat