在jeesite的基础上封装了DateUtils工具类
有获取年限，判断是不是周末等等工具
package com.thinkgem.jeesite.common.utils;import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;import org.apache.commons.lang3.time.DateFormatUtils;/*** 日期工具类, 继承org.apache.commons.lang.time.DateUtils类* @author xl**/
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {private static String[] parsePatterns = {"yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM","yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};/*** 得到当前日期字符串 格式（yyyy-MM-dd）*/public static String getDate() {return getDate("yyyy-MM-dd");}/*** 得到当前日期字符串 格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"*/public static String getDate(String pattern) {return DateFormatUtils.format(new Date(), pattern);}/*** 得到日期字符串 默认格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"*/public static String formatDate(Date date, Object... pattern) {String formatDate = null;if (pattern != null && pattern.length > 0) {formatDate = DateFormatUtils.format(date, pattern[0].toString());} else {formatDate = DateFormatUtils.format(date, "yyyy-MM-dd");}return formatDate;}/*** 得到日期时间字符串，转换格式（yyyy-MM-dd HH:mm:ss）*/public static String formatDateTime(Date date) {return formatDate(date, "yyyy-MM-dd HH:mm:ss");}/*** 得到当前时间字符串 格式（HH:mm:ss）*/public static String getTime() {return formatDate(new Date(), "HH:mm:ss");}/*** 得到当前日期和时间字符串 格式（yyyy-MM-dd HH:mm:ss）*/public static String getDateTime() {return formatDate(new Date(), "yyyy-MM-dd HH:mm:ss");}/*** 得到当前年份字符串 格式（yyyy）*/public static String getYear(Date date) {if (date == null) {return formatDate(new Date(), "yyyy");}return formatDate(date, "yyyy");}/*** 得到当前月份字符串 格式（MM）*/public static String getMonth(Date date) {if (date == null) {return formatDate(new Date(), "MM");}return formatDate(date, "MM");}/*** 得到当天字符串 格式（dd）*/public static String getDay(Date date) {if (date == null) {return formatDate(new Date(), "dd");}return formatDate(date, "dd");}/*** 得到当前星期字符串 格式（E）星期几*/public static String getWeek(Date date) {if (date == null) {return formatDate(new Date(), "E");}return formatDate(date, "E");}/*** 日期型字符串转化为日期 格式* { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", * "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm",* "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm" }*/public static Date parseDate(Object str) {if (str == null){return null;}try {return parseDate(str.toString(), parsePatterns);} catch (ParseException e) {return null;}}/*** 计算工作时间年*/public static int pastYears(Date workTime){long date = pastDays(workTime);int work = (int) (date / 365);return work;}/*** 获取过去的天数* @param date* @return*/public static long pastDays(Date date) {long t = new Date().getTime()-date.getTime();return t/(24*60*60*1000);}/*** 获取过去的小时* @param date* @return*/public static long pastHour(Date date) {long t = new Date().getTime()-date.getTime();return t/(60*60*1000);}/*** 获取过去的分钟* @param date* @return*/public static long pastMinutes(Date date) {long t = new Date().getTime()-date.getTime();return t/(60*1000);}/*** 转换为时间（天,时:分:秒.毫秒）* @param timeMillis* @return*/public static String formatDateTime(long timeMillis){long day = timeMillis/(24*60*60*1000);long hour = (timeMillis/(60*60*1000)-day*24);long min = ((timeMillis/(60*1000))-day*24*60-hour*60);long s = (timeMillis/1000-day*24*60*60-hour*60*60-min*60);long sss = (timeMillis-day*24*60*60*1000-hour*60*60*1000-min*60*1000-s*1000);return (day>0?day+",":"")+hour+":"+min+":"+s+"."+sss;}/*** 获取两个日期之间的天数* * @param before* @param after* @return*/public static double getDistanceOfTwoDate(Date before, Date after) {long beforeTime = before.getTime();long afterTime = after.getTime();return (afterTime - beforeTime) / (1000 * 60 * 60 * 24);}/*** String转date* * 得到当前日期字符串 格式（yyyy-MM-dd） pattern可以为："yyyy-MM-dd" "HH:mm:ss" "E"**/public static Date strToDate(String pattern,String source){Date date = new Date();try {if (pattern == null || "".equals(pattern) ) {DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");date = df.parse(source);return date ;}DateFormat df = new SimpleDateFormat(pattern);date = df.parse(source);} catch (Exception e) {e.printStackTrace();}return date;}/*** Long转 date*/public static Date longToDate(long date){Date d = new Date(date);return d;}/*** date转String*/public static String dateToString(String pattern,Date date){SimpleDateFormat sdf = new SimpleDateFormat(pattern);return sdf.format(date);}/*** date 转long*/public static long dateToLong(Date date){return date.getTime();}/*** 获取每月的第一天* @param date* @return*/public static Date getMonthFirstDay(Date date){DateFormat df = new SimpleDateFormat("yyyy-MM-dd");Calendar calendar= Calendar.getInstance(); calendar.setTime(date);calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMinimum(Calendar.DAY_OF_MONTH)); String first = df.format(calendar.getTime());System.out.println("LastMonthDay:"+first);return calendar.getTime(); }/*** 获取每月的最后一天* @param date* @return*/public static Date getMonthLastDay(Date date){DateFormat df = new SimpleDateFormat("yyyy-MM-dd");Calendar calendar= Calendar.getInstance(); calendar.setTime(date);calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH)); String last = df.format(calendar.getTime());System.out.println("LastMonthDay:"+last);return calendar.getTime();} /*** 判断是不是周六日* @param date* @return* @throws ParseException*/public static boolean isWeek(Date date) throws ParseException {boolean flag = false;Calendar calendar = Calendar.getInstance();calendar.setTime(date);if(calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY){flag = true;return flag;} return flag;}/*** 包含多少个节假日* @param begin* @param end* @return*/public static int getHoliday(Date begin,Date end){return 0;}/*** 俩个日期之间包含多少个周末* @throws ParseException* type true 双休* false 单休*/public static int getWeekdayCount(Date begin,Date end,boolean type) throws ParseException{int count = 0;Date flag = begin;Calendar calendar = Calendar.getInstance();while (flag.compareTo(end) != 1) {calendar.setTime(flag);int week = calendar.get(Calendar.DAY_OF_WEEK) - 1; //判断是否为周六日if (type) {if(week == 0 || week == 6){//0为周日，6为周六calendar.add(Calendar.DAY_OF_MONTH, +1);//跳出循环进入下一个日期flag = calendar.getTime();count ++;continue;}}else{if(week == 0){calendar.add(Calendar.DAY_OF_MONTH, +1);flag = calendar.getTime();count ++;continue;}}calendar.add(Calendar.DAY_OF_MONTH, +1);flag = calendar.getTime();} return count;}/*** 计算给定日期提前或延后多少天* @param date 要计算的日期* @param delay 延后的具体天数*/public Date getExcuteDate(Date date,int delay){Calendar calendar = Calendar.getInstance();calendar.setTime(date);calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - delay);return calendar.getTime();}}