package com.skjd.util;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
public class DateUtil {
private final static SimpleDateFormat sdfYear = new SimpleDateFormat("yyyy");
private final static SimpleDateFormat sdfDay = new SimpleDateFormat(
"yyyy-MM-dd");
private final static SimpleDateFormat sdfMouth = new SimpleDateFormat(
"yyyy-MM");
private final static SimpleDateFormat sdfDays = new SimpleDateFormat(
"yyyyMMdd");
private final static SimpleDateFormat sdfTime = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
public static final String DATE_FORMAT_FULL = "yyyy-MM-dd HH:mm:ss";
public static final String DATE_FORMAT_FULL_MSEL = "yyyyMMddHHmmssSSSS";
/**
* 擷取YYYY格式
*
* @return
*/
public static String getYear() {
return sdfYear.format(new Date());
}
/**
* 擷取YYYY-MM-DD格式
*
* @return
*/
public static String getDay() {
return sdfDay.format(new Date());
}
/**
* 擷取YYYYMMDD格式
*
* @return
*/
public static String getDays(){
return sdfDays.format(new Date());
}
/**
* 擷取YYYY-MM-DD HH:mm:ss格式
*
* @return
*/
public static String getTime() {
return sdfTime.format(new Date());
}
/**
* 傳入一個時間字元串
* 判斷此時間在晚上23點到淩晨6點經過了多久分鐘
* YYYY-MM-DD HH:mm:ss
*/
public static int getNightSum( String s) {
Date date = fomatDate(s);
String str = sdfTime.format(date);
String str2 = str.substring(11, 13);
int i = Integer.parseInt(str2);
if(i>=23){
return Integer.parseInt(str.substring(14, 16));
}else if(i<6){
i=6-i-1;
int j=60-Integer.parseInt(str.substring(14, 16));
return i*60+j;
}else {
return 0;
}
}
/**
* @Title: compareDate
* @Description: TODO(日期比較,如果s>=e 傳回true 否則傳回false)
* @param s
* @param e
* @return boolean
* @throws
* @author luguosui
*/
public static boolean compareDate(String s, String e) {
if(fomatDate(s)==null||fomatDate(e)==null){
return false;
}
return fomatDate(s).getTime() >=fomatDate(e).getTime();
}
/**
* 得到時間戳
*
* @param null
* @return String 目前日期時間戳(yyyyMMddHHmmssSSSS)
*/
public static String getTimeStamp() {
try {
Calendar now = Calendar.getInstance(TimeZone.getDefault());
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_FULL_MSEL);
sdf.setTimeZone(TimeZone.getDefault());
return (sdf.format(now.getTime()));
} catch (Exception e) {
return getCurDateTime(); // 如果無法轉化,則傳回預設格式的時間。
}
}
/**
* 得到目前日期
*
* @return String 目前日期 yyyy-MM-dd HH:mm:ss格式
*/
public static String getCurDateTime() {
Calendar now = Calendar.getInstance(TimeZone.getDefault());
// String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
DateFormat sdf = new SimpleDateFormat(DATE_FORMAT_FULL);
sdf.setTimeZone(TimeZone.getDefault());
return (sdf.format(now.getTime()));
}
/**
* 格式化日期
*
* @return
*/
public static Date fomatDate(String date) {
DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
return fmt.parse(date);
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}
/**
* 校驗日期是否合法
*
* @return
*/
public static boolean isValidDate(String s) {
DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
try {
fmt.parse(s);
return true;
} catch (Exception e) {
// 如果throw java.text.ParseException或者NullPointerException,就說明格式不對
return false;
}
}
public static int getDiffYear(String startTime,String endTime) {
DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
try {
long aa=0;
int years=(int) (((fmt.parse(endTime).getTime()-fmt.parse(startTime).getTime())/ (1000 * 60 * 60 * 24))/365);
return years;
} catch (Exception e) {
// 如果throw java.text.ParseException或者NullPointerException,就說明格式不對
return 0;
}
}
/**
* <li>功能描述:時間相減得到天數
* @param beginDateStr
* @param endDateStr
* @return
* long
* @author Administrator
*/
public static long getDaySub(String beginDateStr,String endDateStr){
long day=0;
java.text.SimpleDateFormat format = new java.text.SimpleDateFormat("yyyy-MM-dd");
java.util.Date beginDate = null;
java.util.Date endDate = null;
try {
beginDate = format.parse(beginDateStr);
endDate= format.parse(endDateStr);
} catch (ParseException e) {
e.printStackTrace();
}
day=(endDate.getTime()-beginDate.getTime())/(24*60*60*1000);
//System.out.println("相隔的天數="+day);
return day;
}
/**
* 得到n天之後的日期
* @param days
* @return
*/
public static String getAfterDayDate(String days) {
int daysInt = Integer.parseInt(days);
Calendar canlendar = Calendar.getInstance(); // java.util包
canlendar.add(Calendar.DATE, daysInt); // 日期減 如果不夠減會将月變動
Date date = canlendar.getTime();
SimpleDateFormat sdfd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateStr = sdfd.format(date);
return dateStr;
}
/**
* 得到n天之後是周幾
* @param days
* @return
*/
public static String getAfterDayWeek(String days) {
int daysInt = Integer.parseInt(days);
Calendar canlendar = Calendar.getInstance(); // java.util包
canlendar.add(Calendar.DATE, daysInt); // 日期減 如果不夠減會将月變動
Date date = canlendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("E");
String dateStr = sdf.format(date);
return dateStr;
}
/**
* 将日期對象轉為時間戳字元串
* @param time
* @return
* @throws ParseException
*/
public static String dateutil(String time) throws ParseException{
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");
Date date = format.parse(time);
time = ""+date.getTime();
return time;
}
/**
* 将日期對象轉為時間戳
* @param time
* @return
* @throws ParseException
*/
public static Long dateutilToLong(String time) throws ParseException{
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm");
Date date = format.parse(time);
Long time2 = date.getTime();
return time2;
}
public static String parseDateToStr(Date thedate) {
// String format = "yyyy-MM-dd";
return parseDateToString(thedate, DATE_FORMAT_FULL);
}
public static String parseDateToString(Date thedate, String format) {
DateFormat df = new SimpleDateFormat(format);
if (thedate != null) {
return df.format(thedate.getTime());
}
return "";
}
/**
* 擷取目前時間前一個月的時間
* @param args
*/
public static String getDateLastMouth(){
Calendar c = Calendar.getInstance();
c.setTime(new Date());
c.add(Calendar.MONTH, -1);
Date m = c.getTime();
return sdfTime.format(m);
}
/**
* 擷取當月第一天的日期
* @return
*/
public static String getMouthNoOne(){
return sdfMouth.format(new Date())+"-01 00:00";
}
public static void main(String[] args) {
boolean b = compareDate("2018-08-18 00:00", DateUtil.getTime());
System.out.println(b);
}
}