package com.lizard.fastdb.util;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
/**
* 日期操作工具类，用于各种日期的获取和转换
*
* @author SHEN.GANG
*/
public class DateUtils {
/**
* 转换long型(秒数)日期格式为字符型日期，精确到时分秒，如：convertTimeToString( 1264834129 ) -->2012-01-30 14:48:49
* @param longTime 需要转换的long型日期
* @return 格式为yyyy-MM-dd HH:mm:ss的字符型日期
*/
public static String convertTimeToString(long longTime) {
return convertTimeToString(longTime, "yyyy-MM-dd HH:mm:ss");
}
/**
* 转换long型(秒数)日期格式为字符型日期，日期格式通过 format 定义，如：convertTimeToString( 1264834129 ,"yyyy-MM-dd" ) --> 2012-01-30
* @param longTime 需要转换的long型日期
* @param format 日期格式 年：yyyy 月：MM 日：dd 小时：HH 分钟：mm 秒：ss
* @return 格式为yyyy-MM-dd HH:mm:ss的字符型日期
*/
public static String convertTimeToString(long longTime, String format) {
try {
Timestamp t = new Timestamp(longTime * 1000);
SimpleDateFormat sDateFormat = new SimpleDateFormat(format);
return sDateFormat.format(t);
} catch (Exception ex) {
throw new RuntimeException("Can't format the time by format["+format+"]!");
}
}
/**
* 转换字符型日期(精确到时分秒)为long型日期(秒数)，如：convertTimeToLong( "2013-01-30 14:48:49" )--> 1264834129
* @param dateTime 需要转换的Str型日期
* @return long型日期
*/
public static long convertTimeToLong(String dateTime) {
return convertTimeToLong(dateTime, "yyyy-MM-dd HH:mm:ss");
}
/**
* 转换字符型日期(日期格式通过format定义)为long型日期(秒数)，如：convertTimeToLong( "2012-01-30","yyyy-MM-dd" ) --> 1264780800
* @param dateTime 需要转换的Str型日期
* @param format 日期格式 年：yyyy 月：MM 日：dd 小时：HH 分钟：mm 秒：ss
* @return long型日期
*/
public static long convertTimeToLong(String dateTime, String format) {
SimpleDateFormat sdf = new SimpleDateFormat(format);
long date = 0;
try {
Date d = sdf.parse(dateTime);
date = d.getTime() / 1000;
} catch (Exception ex) {
throw new RuntimeException("Can't format the time by format["+format+"]!");
}
return date;
}
/**
* 获取当前时间的long型值(秒数)。
* @return long型日期
*/
public static long getCurrentLongTime() {
return System.currentTimeMillis() / 1000;
}
/**
* 获取当前时间字符串表示，精确到时分秒，如：2013-01-30 14:48:49
* @return 字符型日期
*/
public static String getCurrentTime() {
return getCurrentTime("yyyy-MM-dd HH:mm:ss");
}
/**
* 获取当前时间字符串表示，日期格式由format定义，如：getCurrentTime("yyyy-MM-dd") --> 2013-01-30
* @param format 日期格式 年：yyyy 月：MM 日：dd 小时：HH 分钟：mm 秒：ss";
* @return 日期字符串
*/
public static String getCurrentTime(String format) {
try {
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(new Date());
} catch (Exception e) {
throw new RuntimeException("Can't format the time by format["+format+"]!");
}
}
/**
* 获取2个日期之间间隔的天数，如：getDayByDateToDate("2009-12-1","2009-9-29"); --> -63
* @param startDate 起始时间
* @param endDate 结束时间
* @return 间隔天数（long型）
*/
public static long getDayBetweenDateAndDate(String startDate, String endDate) {
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
long day = 0;
try {
Date date = myFormatter.parse(endDate);
Date mydate = myFormatter.parse(startDate);
day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
} catch (Exception ex) {
throw new RuntimeException("Time format["+startDate+"]["+endDate+"] is error ! format must be 'yyyy-MM-dd'！");
}
return day;
}
/**
* 根据日期获取是星期几 0,1,2,3,4,5,6 分别对应 礼拜日,礼拜一，礼拜二，礼拜三，礼拜四，礼拜五，礼拜六
* @return 0-6
*/
public static int getWeekday(String dateTime) {
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
try {
Date date = myFormatter.parse(dateTime);
Calendar cal = Calendar.getInstance();
cal.setTime(date);
return cal.get(Calendar.DAY_OF_WEEK) - 1< 0 ? 0 : cal.get(Calendar.DAY_OF_WEEK) - 1;
} catch (ParseException e) {
throw new RuntimeException("Time format["+dateTime+"] is error ! format must be 'yyyy-MM-dd'！");
}
}
/**
* 获得上周一的日期字符串
* @return 上周星期一的日期字符串
*/
public static String getPreWeekFirstDay() {
Calendar cd = Calendar.getInstance();
int week= cd.get(Calendar.DAY_OF_WEEK) == 1 ? 8 : cd.get(Calendar.DAY_OF_WEEK);
int mondayPlus = week - 1 == 1 ? 0 : 1 - (week - 1);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus - 7);
Date monday = currentDate.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(monday);
}
/**
* 获得上周日的日期字符串
* @return 上周星期日的日期字符串
*/
public static String getPreWeekLastDay() {
Calendar cd = Calendar.getInstance();
int week= cd.get(Calendar.DAY_OF_WEEK) == 1 ? 8 : cd.get(Calendar.DAY_OF_WEEK);
int mondayPlus = week - 1 == 1 ? 0 : 1 - (week - 1);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus -1);
Date monday = currentDate.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(monday);
}
/**
* 获得下周一的日期字符串
* @return 下周星期一的日期字符串
*/
public static String getNextWeekFirstDay() {
Calendar cd = Calendar.getInstance();
int week= cd.get(Calendar.DAY_OF_WEEK) == 1 ? 8 : cd.get(Calendar.DAY_OF_WEEK);
int mondayPlus = week - 1 == 1 ? 0 : 1 - (week - 1);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 7);
Date monday = currentDate.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(monday);
}
/**
* 获得下周日的日期字符串
* @return 下周星期日的日期字符串
*/
public static String getNextWeekLastDay() {
Calendar cd = Calendar.getInstance();
int week= cd.get(Calendar.DAY_OF_WEEK) == 1 ? 8 : cd.get(Calendar.DAY_OF_WEEK);
int mondayPlus = week - 1 == 1 ? 0 : 1 - (week - 1);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
Date monday = currentDate.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(monday);
}
/**
* 获得本周一的日期字符串
* @return 本周星期一的日期字符串
*/
public static String getWeekFirstDay() {
Calendar cd = Calendar.getInstance();
int week= cd.get(Calendar.DAY_OF_WEEK) == 1 ? 8 : cd.get(Calendar.DAY_OF_WEEK);
int mondayPlus = week - 1 == 1 ? 0 : 1 - (week - 1);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus);
Date monday = currentDate.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(monday);
}
/**
* 获得本周日的日期字符串
* @return 本周星期日的日期字符串
*/
public static String getWeekLastDay() {
Calendar cd = Calendar.getInstance();
int week= cd.get(Calendar.DAY_OF_WEEK) == 1 ? 8 : cd.get(Calendar.DAY_OF_WEEK);
int mondayPlus = week - 1 == 1 ? 0 : 1 - (week - 1);
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
Date monday = currentDate.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(monday);
}
/**
* 获取上个月第一天日期字符串
* @return 上个月第一天日期字符串
*/
public static String getPreMonthFirstDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.set(Calendar.DATE, 1);
lastDate.add(Calendar.MONTH, -1);
str = sdf.format(lastDate.getTime());
return str;
}
/**
* 获取上个月最后一天日期字符串
* @return 上个月最后一天日期字符串
*/
public static String getPreMonthLastDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.MONTH, -1);
lastDate.set(Calendar.DATE, 1);
lastDate.roll(Calendar.DATE, -1);
str = sdf.format(lastDate.getTime());
return str;
}
/**
* 获取本月第一天日期字符串
* @return 本月第一天日期字符串
*/
public static String getMonthFirstDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.set(Calendar.DATE, 1);
str = sdf.format(lastDate.getTime());
return str;
}
/**
* 获取本月最后一天日期字符串
* @return 本月最后一天日期字符串
*/
public static String getMonthLastDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.set(Calendar.DATE, 1);
lastDate.add(Calendar.MONTH, 1);
lastDate.add(Calendar.DATE, -1);
str = sdf.format(lastDate.getTime());
return str;
}
/**
* 获取下个月第一天日期字符串
* @return 下个月第一天日期字符串
*/
public static String getNextMonthFirstDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.MONTH, 1);
lastDate.set(Calendar.DATE, 1);
str = sdf.format(lastDate.getTime());
return str;
}
/**
* 获取下个月最后一天日期字符串
* @return 下个月最后一天日期字符串
*/
public static String getNextMonthLastDay() {
String str = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar lastDate = Calendar.getInstance();
lastDate.add(Calendar.MONTH, 1);
lastDate.set(Calendar.DATE, 1);
lastDate.roll(Calendar.DATE, -1);
str = sdf.format(lastDate.getTime());
return str;
}
/**
* 换取指定日期前多少天后多少天的日期，如DateUtils.getBeforeAfterDate("2013-02-08",-1)-->2013-02-07
* @param dateTime 日期字符串
* @param day 相对天数，为正数表示之后，为负数表示之前
* @return 指定日期字符串n天之前或者之后的日期
*/
public static String getBeforeAfterDate(String dateTime, int day) {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date oldDate = null;
try {
df.setLenient(false);
oldDate = new Date(df.parse(dateTime).getTime());
} catch (ParseException e) {
throw new RuntimeException("Time format["+dateTime+"] is error ! format must be 'yyyy-MM-dd'！");
}
Calendar cal = new GregorianCalendar();
cal.setTime(oldDate);
int Year = cal.get(Calendar.YEAR);
int Month = cal.get(Calendar.MONTH);
int Day = cal.get(Calendar.DAY_OF_MONTH);
int NewDay = Day + day;
cal.set(Calendar.YEAR, Year);
cal.set(Calendar.MONTH, Month);
cal.set(Calendar.DAY_OF_MONTH, NewDay);
Date date = new Date(cal.getTimeInMillis());
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(date);
}
}