package com.cn.commoms;
import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.regex.Pattern;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class DateUtil {
protected static Log logger = LogFactory.getLog(DateUtil.class);
/** 格式:年-月-日 小时:分钟:秒 **/
public static final String FORMAT_ONE = "yyyy-MM-dd HH:mm:ss";
/** 格式:年-月-日 小时:分钟 **/
public static final String FORMAT_TWO = "yyyy-MM-dd HH:mm";
/** 格式:年月日 小时分钟秒 **/
public static final String FORMAT_THREE = "yyyyMMdd-HHmmss";
/** 格式:年-月-日 **/
public static final String LONG_DATE_FORMAT = "yyyy-MM-dd";
/** 格式:月-日 **/
public static final String SHORT_DATE_FORMAT = "MM-dd";
/** 格式:小时:分钟:秒 **/
public static final String LONG_TIME_FORMAT = "HH:mm:ss";
/** yyyyMMddHHmmss 紧凑类型 **/
public static final String LONG_DATE_COMPACT_FORMAT = "yyyyMMddHHmmss" ;
// 年的加减
public static final int SUB_YEAR = Calendar.YEAR;
// 月加减
public static final int SUB_MONTH = Calendar.MONTH;
// 天的加减
public static final int SUB_DAY = Calendar.DATE;
// 小时的加减
public static final int SUB_HOUR = Calendar.HOUR;
// 分钟的加减
public static final int SUB_MINUTE = Calendar.MINUTE;
// 秒的加减
public static final int SUB_SECOND = Calendar.SECOND;
// 用来全局控制 上一周,本周,下一周的周数变化
private int weeks = 0;
private int MaxDate;// 一月最大天数
private int MaxYear;// 一年最大天数
public DateUtil() {
}
/**
* 把符合日期格式的字符串转换为日期类型
*
* @param dateStr
* @return
*/
public static java.util.Date StringtoDate(String dateStr, String format) {
Date d = null;
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
formater.setLenient(false);
d = formater.parse(dateStr);
} catch (Exception e) {
// log.error(e);
d = null;
}
return d;
}
/**
* 把符合日期格式的字符串转换为日期类型
*/
public static java.util.Date StringtoDate(String dateStr, String format,
ParsePosition pos) {
Date d = null;
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
formater.setLenient(false);
d = formater.parse(dateStr, pos);
} catch (Exception e) {
// log.error(e);
d = null;
}
return d;
}
/**
* 把日期转换为字符串
*
* @param date
* @return
*/
public static String DateToString(java.util.Date date, String format) {
String result = "";
SimpleDateFormat formater = new SimpleDateFormat(format);
try {
result = formater.format(date);
} catch (Exception e) {
// log.error(e);
}
return result;
}
/**
* 获取当前时间的指定格式
*
* @param format
* @return
*/
public static String getCurrDate(String format) {
return DateToString(new Date(), format);
}
/**
*
* @param dateStr
* @param amount
* @return
*/
public static String DateSub(int dateKind, String dateStr, int amount) {
Date date = StringtoDate(dateStr, FORMAT_ONE);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(dateKind, amount);
return DateToString(calendar.getTime(), FORMAT_ONE);
}
/**
* 两个日期相减
*
* @param firstTime
* @param secTime
* @return 相减得到的秒数
*/
public static long TimeSub(String firstTime, String secTime) {
long first = StringtoDate(firstTime, FORMAT_ONE).getTime();
long second = StringtoDate(secTime, FORMAT_ONE).getTime();
return (second - first) / 1000;
}
/**
* 获得某月的天数
*
* @param year
* int
* @param month
* int
* @return int
*/
public static int getDaysOfMonth(String year, String month) {
int days = 0;
if (month.equals("1") || month.equals("3") || month.equals("5")
|| month.equals("7") || month.equals("8") || month.equals("10")
|| month.equals("12")) {
days = 31;
} else if (month.equals("4") || month.equals("6") || month.equals("9")
|| month.equals("11")) {
days = 30;
} else {
if ((Integer.parseInt(year) % 4 == 0 && Integer.parseInt(year) % 100 != 0)
|| Integer.parseInt(year) % 400 == 0) {
days = 29;
} else {
days = 28;
}
}
return days;
}
/**
* 获取某年某月的天数
*
* @param year
* int
* @param month
* int 月份[1-12]
* @return int
*/
public static int getDaysOfMonth(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1);
return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
}
/**
* 获得当前日期
*
* @return int
*/
public static int getToday() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.DATE);
}
/**
* 获得当前月份
*
* @return int
*/
public static int getToMonth() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 获得当前年份
*
* @return int
*/
public static int getToYear() {
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.YEAR);
}
/**
* 返回日期的天
*
* @param date
* Date
* @return int
*/
public static int getDay(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.DATE);
}
/**
* 返回日期的年
*
* @param date
* Date
* @return int
*/
public static int getYear(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.YEAR);
}
/**
* 返回日期的月份,1-12
*
* @param date
* Date
* @return int
*/
public static int getMonth(Date date) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
return calendar.get(Calendar.MONTH) + 1;
}
/**
* 计算两个日期相差的天数,如果date2 > date1 返回正数,否则返回负数
*
* @param date1
* Date
* @param date2
* Date
* @return long
*/
public static long dayDiff(Date date1, Date date2) {
return (date2.getTime() - date1.getTime()) / 86400000;
}
/**
* 比较两个日期的年差
*
* @param befor
* @param after
* @return
*/
public static int yearDiff(String before, String after) {
Date beforeDay = StringtoDate(before, LONG_DATE_FORMAT);
Date afterDay = StringtoDate(after, LONG_DATE_FORMAT);
return getYear(afterDay) - getYear(beforeDay);
}
/**
* 比较指定日期与当前日期的差
*
* @param befor
* @param after
* @return
*/
public static int yearDiffCurr(String after) {
Date beforeDay = new Date();
Date afterDay = StringtoDate(after, LONG_DATE_FORMAT);
return getYear(beforeDay) - getYear(afterDay);
}
public static int getFirstWeekdayOfMonth(int year, int month) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天
c.set(year, month - 1, 1);
return c.get(Calendar.DAY_OF_WEEK);
}
public static int getLastWeekdayOfMonth(int year, int month) {
Calendar c = Calendar.getInstance();
c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天
c.set(year, month - 1, getDaysOfMonth(year, month));
return c.get(Calendar.DAY_OF_WEEK);
}
/**
* 获得当前日期字符�