参考地址:https://blog.csdn.net/honghongxuexi/article/details/53293130
package demo.springboot.web;
/**
* Created with IntelliJ IDEA.
* User: gaopeng
* Date: 2018/8/10 0010
* Time: 09:09
* Description:
*/
import org.springframework.util.StringUtils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
/**
*
* <p>
* 时间转换工具类
* </p>
*
* @ClassName: DateHelper
* @author: fandonghong
* @date 2016-11-22 上午09:48:59
*
*/
public class DateHelper {
public final static SimpleDateFormat g_SimpleDateFormat = new SimpleDateFormat(
"yyyyMMdd");
public final static SimpleDateFormat g_SimpleDateFormat_I = new SimpleDateFormat(
"yyyy-MM-dd");
public final static SimpleDateFormat g_SimpleDateFormat_II = new SimpleDateFormat(
"yyyyMM");
public final static SimpleDateFormat sdfDateTimeFormat = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
public final static SimpleDateFormat sdfDateTimeFormat_I = new SimpleDateFormat(
"yyyyMMddHHmmss");
public final static SimpleDateFormat sdfDateTimeFormat_IIII = new SimpleDateFormat(
"HH:mm:ss");
public final static SimpleDateFormat sdfDateTimeFormat_YYYY = new SimpleDateFormat(
"yyyy");
public final static SimpleDateFormat x_dateTimeFormat = new SimpleDateFormat(
"yyyy/MM/dd HH:mm:ss");
public final static SimpleDateFormat xISO_dateTimeFormat = new SimpleDateFormat(
"yyyy/MM/dd HH:mm:ss Z");
/**
* 获取当前日期
*
* @return
*/
public static Date getCurrentDate() {
Calendar calendar = Calendar.getInstance();
return calendar.getTime();
}
/**
* 返回当前时间日期格式(yyyyMMddHHmmss)
* @return
*/
public static String getCurDateTime() {
Calendar now = Calendar.getInstance(TimeZone.getDefault());
String DATE_FORMAT = "yyyyMMddHHmmss";
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
sdf.setTimeZone(TimeZone.getDefault());
return (sdf.format(now.getTime()));
}
/**
* 返回日期格式(yyyy-MM-dd HH:mm:ss)
*
* @param date
* @return
*/
public static String getDateTime(java.util.Date date) {
return sdfDateTimeFormat.format(date);
}
/**
* 返回日期格式(yyyyMMdd)
*
* @param date
* @return
*/
public static String getDateTime2(java.util.Date date) {
return g_SimpleDateFormat.format(date);
}
/**
* 返回日期格式(yyyy-MM-dd)
*
* @param date
* @return
*/
public static String getDateTime_I(java.util.Date date) {
return g_SimpleDateFormat_I.format(date);
}
/**
* 返回日期格式(yyyy-MM-dd HH:mm:ss)
*
* @param date
* @return
*/
public static String getDateTime_III(java.util.Date date) {
return sdfDateTimeFormat.format(date);
}
/**
* <p>返回日期格式(yyyy-MM-dd HH:mm:ss)</p>
* <br>
* @return
*/
public static String getCurrDateTime() {
return sdfDateTimeFormat.format(new Date());
}
/**
* 返回时间格式(HH:mm:ss)
*
* @param date
* @return
*/
public static String getDateTime_IIII(java.util.Date date) {
return sdfDateTimeFormat_IIII.format(date);
}
/**
* 返回日期格式(yyyyMMddHHmmss)
*
* @param date
* @return
*/
public static String getDateTime_IV(java.util.Date date) {
return sdfDateTimeFormat_I.format(date);
}
/**
* 获取当前日期(yyyyMMdd)
* @return
*/
public static String getCurDate() {
return g_SimpleDateFormat.format(new Date());
}
/**
* <p>
* 获取当前系统时间的小时数
* </p>
*
* @return
*/
public static int getCurrentHour() {
Calendar calendar = new GregorianCalendar();
return calendar.get(Calendar.HOUR_OF_DAY);
}
/**
* 得到当前时间分钟
* @return
*/
public static int getCurrentMinute() {
Calendar calendar = new GregorianCalendar();
return calendar.get(Calendar.MINUTE);
}
/**
* <p>
* 获取当前年月格式(yyyyMM)
* </p>
*
* @return
*/
public static String getCurrentMonth() {
Calendar calendar = new GregorianCalendar();
return g_SimpleDateFormat_II.format(calendar.getTime());
}
public static String getMonth(Date date) {
return g_SimpleDateFormat_II.format(date);
}
/**
*
* 获得本月的前(后)几个月。(yyyyMM)
* <p>
* %方法详述(简单方法可不必详述)%。
* </p>
*
* @param monthNum
* 月数字(数字大于1为后,小于1为前)
* @return
*/
public static String getBAMonth(int monthNum) {
Calendar calendar = new GregorianCalendar();
calendar.add(Calendar.MONTH, monthNum);
return g_SimpleDateFormat_II.format(calendar.getTime());
}
/**
* <p>
* 获取本月第一天日期(格式如YYYYMMDD),如果当前日为当月1日,则返回上月第一日
* </p>
*
* @return
*/
public static String getMonthFirstDay() {
Calendar calendar = new GregorianCalendar();
int day = calendar.get(Calendar.DAY_OF_MONTH);
int month = 0;
if (day == 1)// 当月第一日
{
calendar.add(Calendar.MONTH, -1);
}
month = calendar.get(Calendar.MONTH);
if (month < 9) {
return "" + calendar.get(Calendar.YEAR) + "0" + (month + 1) + "01";
} else {
return "" + calendar.get(Calendar.YEAR) + (month + 1) + "01";
}
}
/**
* <p>
* 获取当前时间前几天或后几天的日期
* </p>
* 日数字(数字大于1为后,小于1为前)
* @return
*/
public static Date getAddDays(int days) {
Calendar calendar = new GregorianCalendar();
calendar.add(Calendar.DAY_OF_YEAR, days);
return calendar.getTime();
}
/**
* <p>
* 获取某个月后的日期格式(yyyyMMdd)
* </p>
*
* @return
*/
public static String getAfterMonth(int monthNum) {
Calendar calendar = new GregorianCalendar();
calendar.add(Calendar.MONTH, monthNum);
return g_SimpleDateFormat.format(calendar.getTime());
}
/**
* <p>
* 返回日期(格式yyyyMMdd)
* </p>
*
* @param timeMillis
* @return
*/
public static String getFormatDate(long timeMillis) {
return sdfDateTimeFormat_I.format(new Date(timeMillis));
}
/**
* 获取当前系统时间距离传入时间的毫秒数
*
* @param strTime
* 格式[ DD:00:00]
* @return
* @throws ParseException
*/
public static long getSleepTime(String strTime) throws ParseException {
long p = 1;
long l_date = System.currentTimeMillis();
java.util.Date date_now = new java.util.Date(l_date);
String strDate = g_SimpleDateFormat_I.format(date_now) + strTime;
if (date_now.before(sdfDateTimeFormat.parse(strDate)))
p = (sdfDateTimeFormat.parse(strDate)).getTime() - l_date;
else {
Calendar calendar = new GregorianCalendar();
calendar.setTime(date_now);
calendar.add(Calendar.DAY_OF_YEAR, 1);
java.util.Date date = calendar.getTime();
strDate = g_SimpleDateFormat_I.format(date) + strTime;
p = (sdfDateTimeFormat.parse(strDate)).getTime() - l_date;
}
return p;
}
/**
* 返回当前日期的前一天 返回格式(YYYY-mm-dd)
* @return
*/
public static String getPredate() {
Date nowDate = new Date();
String nowdates = g_SimpleDateFormat_I.format(nowDate);
String[] dates = nowdates.split("-");
int year = Integer.parseInt(dates[0]);
int month = Integer.parseInt(dates[1]);
int day = Integer.parseInt(dates[2]) - 1;
if (day == 0) {
switch (month - 1) {
case 1:
day = 31;
break;
case 3:
day = 31;
break;
case 5:
day = 31;
break;
case 7:
day = 31;
break;
case 8:
day = 31;
break;
case 10:
day = 31;
break;
case 0:
month = 13;
year = year - 1;
day = 31;
break;
case 4:
day = 30;
break;
case 6:
day = 30;
break;
case 9:
day = 30;
break;
case 11:
day = 30;
break;
case 2:
if (year % 4 == 0) {
day = 29;
} else {
day = 28;
}
break;
default:
break;
}
month = month - 1;
}
String predate = Integer.toString(year) + "-"+ (month < 10 ? "0" + month : month) + "-"+ (day < 10 ? "0" + day : day);
return predate;
}
/**
* add by hushiwang
* <p>
* 得到xxxx年xx月xx日 日期格式。
* </p>
*
* @param date
* @return
*/
public static String getChinaDateFormat(Date date) {
// 得到yyyy-mm-dd格式日期格式
String dateStr = getDateTime_I(date);
StringBuffer sb = new StringBuffer();
if (dateStr != null && dateStr.length() > 0) {
String[] newStr = dateStr.split("-");
// 得到月
Integer month = Integer.valueOf(newStr[1]);
// 得到日
Integer day = Integer.valueOf(newStr[2]);
sb.append(newStr[0]).append("年");
sb.append(month).append("月").append(day).append("日");
}
return sb.toString();
}
/**
* add by wangzs
* <p>
* 得到xxxx年xx月xx日xx时xx分日期格式。
* </p>
*
* @param date
* @return
*/
public static String getChinaDateFormat_II(Date date) {
// 得到yyyy-mm-dd HH:mm:ss格式日期格式
String dateStr = getDateTime(date);
StringBuffer sb = new StringBuffer();
if (dateStr != null && dateStr.length() > 0) {
String[] str = dateStr.split(" ");
if (str != null && str.length > 1 ) {
String[] newStr = str[0].split("-");
// 得到月
Integer month = Integer.valueOf(newStr[1]);
// 得到日
Integer day = Integer.valueOf(newStr[2]);
sb.append(newStr[0]).append("年");
sb.append(month).append("月").append(day).append("日");
String[] newStr_II = str[1].split(":");
sb.append(newStr_II[0]).append("时").append(newStr_II[1]).append("分");
}
}
return sb.toString();
}
/**
* add by hushiwang
* <p>
* 得到xxxx年xx月xx日 日期格式。
* </p>
*
* @param date
* 格式必须是2009-03-21字符串
* @return
*/
public static String getChinaDateFormat(String date) {
// 得到yyyy-mm-dd格式日期格式
StringBuffer sb = new StringBuffer();
if (date != null && date.length() > 0) {
String[] newStr = date.split("-");
// 得到月
Integer month = Integer.valueOf(newStr[1]);
// 得到日
Integer day = Integer.valueOf(newStr[2]);
sb.append(newStr[0]).append("年");
sb.append(month).append("月").append(day).append("日");
}
return sb.toString();
}
/**
* 判断一个日期字符串是否合法
*
* @param date
* @param format
* @return
*
*/
public static boolean isDateStringCorrect(String date, String format) {
SimpleDateFormat df = new SimpleDateFormat(format);
try {
df.setLenient(false);
df.parse(date);
return true;
} catch (Exception e) {
return false;
}
}
/**
*
* <P>
* 将字符串类型的日期格式 转换为 符合要求的日期格式
* </P>
*
* @param date
* @param format
* @return
*/
public static String getStrDate4String(String date, String format) {
if (date == null || date.trim().equals("")) {
return "";
} else {
SimpleDateFormat df = new SimpleDateFormat(format);
try {
Date d = df.parse(date);
return df.format(d);
} catch (ParseException e) {
System.out.println(e);
return "";
}
}
}
/**
*
* <P>
* 将Date类型的日期格式 转换为 符合要求的 String日期格式
* </P>
*
* @param date
* @param format
* @return
*/
public static String getStrDate4Date(Date date, String format) {
if (date == null) {
return "";
} else {
SimpleDateFormat df = new SimpleDateFormat(format);
return df.format(date);
}
}
/**
*
* <P>
* 将字符串类型的日期格式 转换为 符合要求的 Date类型的日期格式
* </P>
*
* @param date
* @param format
* @return
*/
public static Date getDate4StrDate(String date, String format) {
if (date == null || date.trim().equals("")) {
return null;
} else {
SimpleDateFormat df = new SimpleDateFormat(format);
try {
return df.parse(date);
} catch (ParseException e) {
return null;
}
}
}
/**
* 计算指定日期时间之间的时间差
*
* @param beginStr
* 开始日期字符串
* @param endStr
* 结束日期字符串
* @param f
* 时间差的形式0-秒,1-分种,2-小时,3--天 日期时间字符串格式:yyyyMMddHHmmss
* */
public static int getInterval(String beginStr, String endStr, int f) {
int hours = 0;
try {
Date beginDate = sdfDateTimeFormat.parse(beginStr);
Date endDate = sdfDateTimeFormat.parse(endStr);
long millisecond = endDate.getTime() - beginDate.getTime(); // 日期相减得到日期差X(单位:毫秒)
/**
* Math.abs((int)(millisecond/1000)); 绝对值 1秒 = 1000毫秒
* millisecond/1000 --> 秒 millisecond/1000*60 - > 分钟
* millisecond/(1000*60*60) -- > 小时 millisecond/(1000*60*60*24) -->
* 天
* */
switch (f) {
case 0: // second
return (int) (millisecond / 1000);
case 1: // minute
return (int) (millisecond / (1000 * 60));
case 2: // hour
return (int) (millisecond / (1000 * 60 * 60));
case 3: // day
return (int) (millisecond / (1000 * 60 * 60 * 24));
}
} catch (Exception e) {
e.printStackTrace();
}
return hours;
}
/**
*
* <P>
* 得到起始日期前或后天数的日期
* </P>
*
* @param starttime
* 起始日期 格式:yyyy-MM-dd
* @param days
* @return
* @throws ParseException
*/
public static Date getStartDateInterval(String starttime, int days) {
// 格式化起始时间 yyyyMMdd
Date startDate = null;
try {
startDate = g_SimpleDateFormat_I.parse(starttime);
} catch (ParseException e) {
e.printStackTrace();
}
Calendar startTime = Calendar.getInstance();
startTime.clear();
startTime.setTime(startDate);
startTime.add(Calendar.DAY_OF_YEAR, days);
return startTime.getTime();
}
/**
*
* <P>
* 得到起始日期和结束日期之间的天数
* </P>
*
* @param beginStr
* 起始日期
* @param endStr
* 结束日期
* @param format
* 根据 日期参数的格式,传对应的SimpleDateFormat格式
* @return 天数
*/
public static int getDaysInterval(String beginStr, String endStr,
SimpleDateFormat format) {
try {
Date beginDate = format.parse(beginStr);
Date endDate = format.parse(endStr);
long millisecond = endDate.getTime() - beginDate.getTime(); // 日期相减得到日期差X(单位:毫秒)
return (int) (millisecond / (1000 * 60 * 60 * 24));
} catch (ParseException e) {
e.printStackTrace();
}
return 0;
}
/**
* 得到某个时间当天的最后时间 (时分秒为 23:59:59形式)
*/
public static Date getEndDate(Date date){
if(date!=null){
//将截止时间设为指定日期的23:59:59
date.setHours(23);
date.setMinutes(59);
date.setSeconds(59);
}
return date;
}
/**
* 得到本月第一天
* @return
*/
public static Date getFristDayOfMonth() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
return calendar.getTime();
}
/**
* 得到本月最后一天
* @return
*/
public static Date getLastDayOfMonth() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) + 1);
calendar.set(Calendar.DAY_OF_MONTH, 1);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MINUTE, 0);
return calendar.getTime();
}
/**
* 获得本周一的日期
* @return
* @throws ParseException
*/
public static Date getMondayOFWeek() throws ParseException {
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(Calendar.DATE, mondayPlus);
Date monday = currentDate.getTime();
String dateStr = getDateTime_I(monday);
StringBuffer sb = new StringBuffer(dateStr);
sb.append(" ").append("00:00:00");
return parseDateStrToDate(sb.toString());
}
/**
* 获得本周星期日的日期
* @return
* @throws ParseException
*/
public static Date getCurrentWeekday() throws ParseException {
int mondayPlus = getMondayPlus();
GregorianCalendar currentDate = new GregorianCalendar();
currentDate.add(Calendar.DATE, mondayPlus + 6);
Date monday = currentDate.getTime();
String dateStr = getDateTime_I(monday);
StringBuffer sb = new StringBuffer(dateStr);
sb.append(" ").append("00:00:00");
return parseDateStrToDate(sb.toString());
}
/**
* 字符串时间格式转换为 Date
* @param date 此格式 yyyy-MM-dd HH:mm:ss
* @return
* @throws ParseException
*/
public static Date parseDateStrToDate(String date)
throws ParseException{
Date date_time = null;
if(!StringUtils.isEmpty(date)){
date_time = sdfDateTimeFormat.parse(date);
}
return date_time;
}
/**
* 字符串时间格式转换为 Date
* @param date 此格式 yyyy-MM-dd
* @return
* @throws ParseException
*/
public static Date parseDateFromStr(String date)
throws ParseException{
Date date_time = null;
if(!StringUtils.isEmpty(date)){
date_time = g_SimpleDateFormat_I.parse(date);
}
return date_time;
}
public static int getMondayPlus() {
Calendar cd = Calendar.getInstance();
// 因为按中国礼拜一作为第一天所以这里减1
int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1;
if (dayOfWeek == 1) {
return 0;
}else if(dayOfWeek==0){
return 1-7;
} else {
return 1 - dayOfWeek;
}
}
/**
* 得到当天开始时间
* @return
* @throws ParseException
*/
public static Date getTodayStartDateTime(Date date) throws ParseException{
String dateStr = getDateTime_I(date);
StringBuffer sb = new StringBuffer(dateStr);
sb.append(" ").append("00:00:00");
return parseDateStrToDate(sb.toString());
}
/**
* 得到当前年份
* @return
*/
public static int getCurrentYear(){
Calendar c = Calendar.getInstance();
return c.get(Calendar.YEAR);
}
/**
* 得到当前月份
* @return
*/
public static int getMonth(){
Calendar c = Calendar.getInstance();
return c.get(Calendar.MONTH)+1;
}
/**
* 得到当前日
* @return
*/
public static int getDayOfMonth(){
Calendar c = Calendar.getInstance();
return c.get(Calendar.DAY_OF_MONTH);
}
/**
* <p>获得指定的年,int格式</p>
* <br>
* @param date
* @return
*/
public static int getCustomYear(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.YEAR);
}
/**
* <p>获得指定的月,int格式</p>
* <br>
* @param date
* @return
*
*/
public static int getCustomMonth(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.MONTH)+1;
}
/**
* <p>获得指定的日(月份中的),int格式</p>
* <br>
* @param date
* @return
*/
public static int getCustomDayOfMonth(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.DAY_OF_MONTH);
}
/**
* <p>获得指定的小时(日中的),int格式</p>
* <br>
* @return
*/
public static int getCustomHour(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.HOUR_OF_DAY);
}
/**
* <p>获得指定的分钟,int格式</p>
* <br>
* @return
*/
public static int getCustomMinute(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.MINUTE);
}
/**
* <p>获得指定的秒,int格式</p>
* <br>
* @return
*/
public static int getCustomSecond(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
return c.get(Calendar.SECOND);
}
/**
*
* @param beginDate
* @param endDate
* @param f
* 时间差的形式0:秒,1:分种,2:小时,3:天
* @return
*/
public static int getDifferenceNum(Date beginDate,Date endDate,int f){
int result = 0;
if(beginDate==null || endDate==null){
return 0;
}
try{
// 日期相减得到日期差X(单位:毫秒)
long millisecond = endDate.getTime() - beginDate.getTime();
/**
* Math.abs((int)(millisecond/1000)); 绝对值 1秒 = 1000毫秒
* millisecond/1000 --> 秒 millisecond/1000*60 - > 分钟
* millisecond/(1000*60*60) -- > 小时 millisecond/(1000*60*60*24) -->
* 天
* */
switch (f) {
case 0: // second
return (int) (millisecond / 1000);
case 1: // minute
return (int) (millisecond / (1000 * 60));
case 2: // hour
return (int) (millisecond / (1000 * 60 * 60));
case 3: // day
return (int) (millisecond / (1000 * 60 * 60 * 24));
}
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
/**
* <p>比较两个日期的大小,精确到秒</p>
*
* @param d1
* @param d2
* @date 2016-11-22
* @return 返回一个long类型的整数,若大于0表示第一个日期晚于第二个日期,小于0表示第一个日期早于第二个日期,否则相等
*/
public static long compareEachOther(Date d1, Date d2){
if(d1 == null || d2 == null)
return -1;
String d1Str = d1.getTime() + "";
String d2Str = d2.getTime() + "";
int l1 = d1Str.length();
int l2 = d2Str.length();
d1Str = d1Str.substring(0, l1 - 3) + "000";
d2Str = d2Str.substring(0, l2 - 3) + "000";
//System.out.println(d1Str + " " + d2Str);
long long1 = Long.parseLong(d1Str);
long long2 = Long.parseLong(d2Str);
return long1 - long2;
}
public static void main(String[] args) throws ParseException {
//获取当前日期
System.out.println(getCurrentDate());
//返回当前时间日期格式(yyyyMMddHHmmss)
System.out.println(getCurDateTime());
//返回日期格式(yyyy-MM-dd HH:mm:ss)
System.out.println(getDateTime(new Date()));
//返回日期格式(yyyyMMdd)
System.out.println(getDateTime2(new Date()));
//获取当前年月格式(yyyyMM)
System.out.println(getCurrentMonth());
// 获得本月的几个月。(yyyyMM)
System.out.println(getBAMonth(-8));
//获取本月第一天日期(格式如YYYYMMDD),如果当前日为当月1日,则返回上月第一日
System.out.println(getMonthFirstDay());
//获取当前时间前几天或后几天的日期
System.out.println(getAddDays(-1));
//获取某个月后的日期格式
System.out.println(getAfterMonth(-1));
System.out.println(getPredate());
System.out.println(getFristDayOfMonth());
//
System.out.println(getCurrentYear());
//
System.out.println(getMonth());
//
System.out.println(getDayOfMonth());
}
}