public class DateUtils {
/**
* 两个时间之差
* @param startDate
* @param endDate
* @return 分钟
*/
public static Integer getBetweenMinutes(Date startDate, Date endDate) {
Integer minutes = 0;
try {
if(startDate!=null&&endDate!=null) {
long ss = 0;
if(startDate.before(endDate)) {
ss = endDate.getTime() - startDate.getTime();
}else {
ss = startDate.getTime() - endDate.getTime();
}
minutes = Integer.valueOf((int) (ss/(60*1000))) ;
}
} catch (Exception e) {
e.printStackTrace();
}
return minutes;
}
/**
* 两个时间只差
* @param startDate
* @param endDate
* @return 分钟
*/
public static Integer getBetweenMinutes(String a, String b) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date startDate;
Date endDate;
try {
startDate = format.parse(a);
endDate = format.parse(b);
try {
long ss = 0;
if(startDate.before(endDate)) {
ss = endDate.getTime() - startDate.getTime();
}else {
ss = startDate.getTime() - endDate.getTime();
}
return Integer.valueOf((int) (ss/(60*1000))) ;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
} catch (ParseException e1) {
e1.printStackTrace();
return 0;
}
}
/**
* 两个时间只差
* @param startDate
* @param endDate
* @return 秒数
*/
public static Integer getBetweenSecond(Date startDate, Date endDate) {
Integer seconds = 0;
try {
if(startDate!=null&&endDate!=null) {
long ss = 0;
if(startDate.before(endDate)) {
ss = endDate.getTime() - startDate.getTime();
}else {
ss = startDate.getTime() - endDate.getTime();
}
seconds = Integer.valueOf((int) (ss/(1000))) ;
}
} catch (Exception e) {
e.printStackTrace();
}
return seconds;
}
/**
* 两个时间只差
* @param startDate
* @param endDate
* @return 秒数
*/
public static Integer getBetweenSecond(String a, String b) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date startDate;
Date endDate;
try {
startDate = format.parse(a);
endDate = format.parse(b);
try {
long ss = 0;
if(startDate.before(endDate)) {
ss = endDate.getTime() - startDate.getTime();
}else {
ss = startDate.getTime() - endDate.getTime();
}
return Integer.valueOf((int) (ss/(1000))) ;
} catch (Exception e) {
e.printStackTrace();
return 0;
}
} catch (ParseException e1) {
e1.printStackTrace();
return 0;
}
}
public static String getDatFormat(Date date, String dateFormat) {
try {
SimpleDateFormat format = new SimpleDateFormat(dateFormat);
return format.format(date);
} catch (Exception e) {
e.printStackTrace();
SimpleDateFormat format = new SimpleDateFormat("YYYY-MM-DD");
return format.format(new Date());
}
}
/**
* 获取两个时间之间的日期、月份、年份
* @param beginDate
* @param endDate
* @param type{1：日期，2：月份，其他：年份}
* @return
*/
public static List<String> getBetweenDates(String startDate, String endDate, Integer type) {
SimpleDateFormat format= null;
Date begin = null;
Date end = null;
Integer obj = null;
Integer flag = null;
if(type!=null&&type==1){
format = new SimpleDateFormat("yyyy-MM-dd");
obj = Calendar.DAY_OF_YEAR;
flag = 9;
}else if(type!=null&&type==2){
format = new SimpleDateFormat("yyyy-MM");
obj = Calendar.MONTH;
flag = 11;
}else{
format = new SimpleDateFormat("yyyy");
obj = Calendar.YEAR;
flag = 9;
}
if(StringUtils.isNotEmpty(startDate)&&StringUtils.isNotEmpty(endDate)){
try {
begin = format.parse(startDate);
end = format.parse(endDate);
} catch (ParseException e) {
e.printStackTrace();
}
}else{
end = new Date();
begin = getDateBefore(end,flag,obj);
}
List<String> result = new ArrayList<String>();
Calendar tempStart = Calendar.getInstance();
tempStart.setTime(begin);
while (begin.getTime() <= end.getTime()) {
result.add(format.format(tempStart.getTime()));
tempStart.add(obj, 1);
begin = tempStart.getTime();
}
return result;
}
/**
* 获取两个时间之间的日期、月份、年份
* @param date{YYYY-MM-DD-YYYY-MM-DD}
* @param type{1：日期，2：月份，其他：年份}
* @return
*/
public static List<String> getBetweenDates(String date,Integer type) {
SimpleDateFormat format= null;
Date begin = null;
Date end = null;
Integer obj = null;
String startDate = null;
String endDate = null;
Integer flag = null;
if(type!=null&&type==1){
format = new SimpleDateFormat("yyyy-MM-dd");
obj = Calendar.DAY_OF_YEAR;
flag = 9;
}else if(type!=null&&type==2){
format = new SimpleDateFormat("yyyy-MM");
obj = Calendar.MONTH;
flag = 11;
}else{
format = new SimpleDateFormat("yyyy");
obj = Calendar.YEAR;
flag = 9;
}
if(StringUtils.isNotEmpty(date)){
startDate = date.substring(0, 10);
endDate = date.substring(date.length()-10, date.length());
try {
begin = format.parse(startDate);
end = format.parse(endDate);
} catch (ParseException e) {
e.printStackTrace();
}
}else{
end = new Date();
begin = getDateBefore(end,flag,obj);
}
List<String> result = new ArrayList<String>();
Calendar tempStart = Calendar.getInstance();
tempStart.setTime(begin);
while (begin.getTime() <= end.getTime()) {
result.add(format.format(tempStart.getTime()));
tempStart.add(obj, 1);
begin = tempStart.getTime();
}
return result;
}
/**
* 拆分时间间隔
* Title: getDateArray
* Description: '2018-04-04 - 2018-05-22'
* @author guojx
* @date 2018年4月13日
*/
public static String[] getDateArray(String date) {
String[] defalut = {"",""};
try {
if(StringUtils.isNotEmpty(date)) {
String startDate = date.substring(0, 10);
String endDate = date.substring(date.length()-10, date.length());
String[] dates = {startDate,endDate};
return dates;
}else {
return defalut;
}
} catch (Exception e) {
e.printStackTrace();
return defalut;
}
}
public static Date getDateBefore(Date d, int day,Integer type) {
Calendar now = Calendar.getInstance();
now.setTime(d);
now.set(type, now.get(type) - day);
return now.getTime();
}
/**
* 获取给定日期之前或之后的日期
* @param date
* @param type
* @param num
* @return
*/
public static String getPreviouslyDate(Date date, String type, Integer num) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
String resultDate = "";
Calendar c = Calendar.getInstance();
c.setTime(date);
try {
switch (type) {
case "day":
c.add(Calendar.DATE, num);
break;
case "month":
c.add(Calendar.MONTH, num);
break;
case "year":
c.add(Calendar.YEAR, num);
break;
default:
c.add(Calendar.DATE, 0);
break;
}
Date d = c.getTime();
resultDate = format.format(d);
return resultDate;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
*******************************************
* 方法名称:判断日期是否是某一天
* 创建人：guojx
* 创建时间：2018年4月19日 下午9:44:57
* @param date
* @param num
* @return
* @return:boolean
*******************************************
*/
public static boolean isOneday(Date date, Integer num){
SimpleDateFormat fmt=new SimpleDateFormat("yyyy-MM-dd");
String dateStr = fmt.format(date).toString();
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
calendar.add(Calendar.DAY_OF_MONTH, num);
String oneDateStr = fmt.format(calendar.getTime()).toString();
if(dateStr.equals(oneDateStr)){//格式化为相同格式
return true;
}else {
return false;
}
}
public static void main(String[] args){
// System.out.println(DateUtils.getPreviouslyDate(new Date(), "day", -1));
// String[] dates = getDateArray("2018-04-04 - 2018-05-22");
// for (int i = 0; i < dates.length; i++) {
// System.out.println(dates[i].toString());
// }
// System.out.println(getBetweenDates("2018-04-11","2018-04-11",1));
// System.out.println(DateUtils.getPreviouslyDate(new Date(), "day", 0));
System.out.println(DateUtils.getPreviouslyDate(new Date(),"month",-7));
/*System.out.println(getBetweenSecond("2017-11-14 21:30:46","2017-11-14 21:33:46"));*/
}
}
java时间帮助类（计算时间差）
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