package message.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* 时间的工具类
*
* @author sunhao(sunhao.java@gmail.com)
* @see org.apache.commons.lang.time.DateUtils
*/
public final class DateUtils extends org.apache.commons.lang.time.DateUtils {
/**
* 私有化构造器
*/
private DateUtils() {
}
/**
* Default date formate pattern.
*/
public static final String DEFAULT_PATTERN = "yyyy-MM-dd HH:mm:ss";
/**
* 把字符串转成日期型
*
* @param date
* @param pattern
* @return
*/
public static Date parseDate(final String date, final String pattern) {
if (StringUtils.isEmpty(date)) {
return null;
}
String pat = pattern;
if (StringUtils.isEmpty(pat)) {
pat = DEFAULT_PATTERN;
}
try {
return new SimpleDateFormat(pat).parse(date);
} catch (ParseException e) {
return null;
}
}
/**
* 将日期型转成字符串型
*
* @param date
* @param pattern
* @return
*/
public static String formatDate(Date date, String pattern) {
if (StringUtils.isEmpty(pattern)) {
pattern = DEFAULT_PATTERN;
}
return new SimpleDateFormat(pattern).format(date);
}
/**
* 获取给定时间的那天的最后时刻
*
* @param day 给定时间(em.2011-01-25 22:11:00...)
* @return 给定时间的那天的最后时刻(em.2011-01-25 23:59:59...)
*/
public static Date getEndOfDay(Date day) {
if (day == null)
day = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(day);
calendar.set(Calendar.HOUR_OF_DAY, calendar.getMaximum(Calendar.HOUR_OF_DAY));
calendar.set(Calendar.MINUTE, calendar.getMaximum(Calendar.MINUTE));
calendar.set(Calendar.SECOND, calendar.getMaximum(Calendar.SECOND));
calendar.set(Calendar.MILLISECOND, calendar.getMaximum(Calendar.MILLISECOND));
return calendar.getTime();
}
/**
* 获取给定时间的那天的开始时刻
*
* @param day 给定时间(em.2011-01-25 22:11:00...)
* @return 给定时间的那天的最后时刻(em.2011-01-25 00:00:00...)
*/
public static Date getStartOfDay(Date day) {
if (day == null)
day = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(day);
calendar.set(Calendar.HOUR_OF_DAY, calendar.getMinimum(Calendar.HOUR_OF_DAY));
calendar.set(Calendar.MINUTE, calendar.getMinimum(Calendar.MINUTE));
calendar.set(Calendar.SECOND, calendar.getMinimum(Calendar.SECOND));
calendar.set(Calendar.MILLISECOND, calendar.getMinimum(Calendar.MILLISECOND));
return calendar.getTime();
}
/**
* 获取给定时间的那个月的最后时刻
*
* @param day 给定时间(em.2011-01-25 22:11:00...)
* @return 给定时间的那个月的最后时刻(em.2011-01-31 23:59:59...)
*/
public static Date getEndOfMonth(Date day) {
if (day == null)
day = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(day);
calendar.set(Calendar.HOUR_OF_DAY, calendar.getMaximum(Calendar.HOUR_OF_DAY));
calendar.set(Calendar.MINUTE, calendar.getMaximum(Calendar.MINUTE));
calendar.set(Calendar.SECOND, calendar.getMaximum(Calendar.SECOND));
calendar.set(Calendar.MILLISECOND, calendar.getMaximum(Calendar.MILLISECOND));
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.add(Calendar.MONTH, 1);
calendar.add(Calendar.DAY_OF_MONTH, -1);
return calendar.getTime();
}
/**
* 获取给定时间的那个月的开始时刻
*
* @param day 给定时间(em.2011-01-25 22:11:00...)
* @return 给定时间的那个月的开始时刻(em.2011-01-01 00:00:00...)
*/
public static Date getStartOfMonth(Date day) {
if (day == null)
day = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(day);
calendar.set(Calendar.HOUR_OF_DAY, calendar.getMinimum(Calendar.HOUR_OF_DAY));
calendar.set(Calendar.MINUTE, calendar.getMinimum(Calendar.MINUTE));
calendar.set(Calendar.SECOND, calendar.getMinimum(Calendar.SECOND));
calendar.set(Calendar.MILLISECOND, calendar.getMinimum(Calendar.MILLISECOND));
calendar.set(Calendar.DAY_OF_MONTH, 1);
return calendar.getTime();
}
/**
* 获取给定时间的那天的正午时刻
*
* @param day 给定时间(em.2011-01-25 22:11:00...)
* @return 给定时间的那天的最后时刻(em.2011-01-25 12:00:00...)
*/
public static Date getNoonOfDay(Date day) {
if (day == null)
day = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(day);
calendar.set(Calendar.HOUR_OF_DAY, 12);
calendar.set(Calendar.MINUTE, calendar.getMinimum(Calendar.MINUTE));
calendar.set(Calendar.SECOND, calendar.getMinimum(Calendar.SECOND));
calendar.set(Calendar.MILLISECOND, calendar.getMinimum(Calendar.MILLISECOND));
return calendar.getTime();
}
/**
* 获取当前时间
*
* @return
*/
public static Date getNow() {
return new Date();
}
/**
* 获取给定日期的星期数
*
* @param prefix 前缀 ep.'星期'
* @param date 给定日期 eg.'2012-01-25 23:07:58'
* @return 前缀+(星期数) ep.'星期三'
*/
public static String getDayOfWeek(String prefix, Date date) {
final String dayNames[] = {"日", "一", "二", "三", "四", "五", "六"};
Calendar cal = Calendar.getInstance();
cal.setTime(date);
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK) - 1;
if (dayOfWeek < 0)
dayOfWeek = 0;
return prefix + dayNames[dayOfWeek];
}
/**
* 获取给定日期的星期数(默认前缀:'星期')
*
* @param date
* @return
*/
public static String getDayOfWeek(Date date) {
return getDayOfWeek("星期", date);
}
/**
* 获取当前日历所属的年.
*
* @return 当前日历所属的年.
*/
public static int getCurrentYear() {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
return calendar.get(Calendar.YEAR);
}
/**
* 获取当前日历所属的月，月份是从1开始的.
*
* @return 当前日历所属的月.
*/
public static int getCurrentMonth() {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 获取间隔给定天数的日期 <br>
*
* @param date 给定的日期(eg:2015-06-02 12:00)
* @param days 间隔的天数，正数是给定时间往后，负数是给定时间往前(eg:-1 or 1)
* @return 计算出来的日期(eg:2015-06-01 12:00 or 2015-06-03 12:00)<br>
*/
public static Date intervalSomeDays(Date date, int days) {
if (date == null)
return date;
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_YEAR, cal.get(Calendar.DAY_OF_YEAR) + days);
return cal.getTime();
}
/**
* 获取间隔给定月数的日期 <br>
*
* @param date 给定的日期(eg:2015-06-02 12:00)
* @param months 间隔的月数，正数是给定时间往后，负数是给定时间往前(eg:-1 or 1)
* @return 计算出来的日期(eg:2015-05-02 12:00 or 2015-07-02 12:00)<br>
*/
public static Date intervalSomeMonths(Date date, int months) {
if (date == null)
return date;
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + months);
return cal.getTime();
}
/**
* 获取间隔给定月数的日期 <br>
*
* @param date 给定的日期(eg:2015-06-02 12:00)
* @param years 间隔的月数，正数是给定时间往后，负数是给定时间往前(eg:-1 or 1)
* @return 计算出来的日期(eg:2014-06-02 12:00 or 2016-06-02 12:00)<br>
*/
public static Date intervalSomeYears(Date date, int years) {
if (date == null)
return date;
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.YEAR, cal.get(Calendar.YEAR) + years);
return cal.getTime();
}
}