DateUtil

将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss

public static Date strToDateLong(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

获取昨天时间

public static String getYesterday(){

Calendar cal = Calendar.getInstance();

cal.add(Calendar.DATE, -1);

String yesterday = new SimpleDateFormat( "yyyy-MM-dd").format(cal.getTime());

return yesterday;

}

获取两个日期之间的所有日期（yyyy-MM-dd）

public static List<String> getBetweenDates(Date begin, Date end) {

List<String> result = new ArrayList<String>();

Calendar tempStart = Calendar.getInstance();

tempStart.setTime(begin);

DateFormat df = new SimpleDateFormat("yyyy-MM-dd");

while (begin.getTime() <= end.getTime()) {

result.add(df.format(tempStart.getTime()));

tempStart.add(Calendar.DAY_OF_YEAR, 1);

begin = tempStart.getTime();

}

return result;

}

获取两个日期之间的所有日期（yyyy-MM-dd）

public static Map<String,EnvInfoRecordLowHeight> getBetweenDatesForEnvBean(Date begin, Date end) {

Map<String,EnvInfoRecordLowHeight> result = new HashMap<String,EnvInfoRecordLowHeight>();

Calendar tempStart = Calendar.getInstance();

tempStart.setTime(begin);

DateFormat df = new SimpleDateFormat("yyyy-MM-dd");

while (begin.getTime() <= end.getTime()) {

result.put(df.format(tempStart.getTime()),new EnvInfoRecordLowHeight());

tempStart.add(Calendar.DAY_OF_YEAR, 1);

begin = tempStart.getTime();

}

return result;

}

转换日期格式

• 支持:yyyy-MM-dd HH:mm:ss yyyy/MM/dd HH:mm:ss yyyyMMdd HH:mm:ss

• 支持:yyyy-MM-dd yyyy/MM/dd yyyyMMdd

• @param strDate

• @return

public static Date toDate(String strDate){

Date date = null;

try{

if(StrUtil.isNotEmpty(strDate)){

if(strDate.contains(":")){//带时分秒

if(strDate.contains("-")){

date = DateUtil.strToLongDate(strDate);

}else if(strDate.contains("/")){

date = DateUtil.strToLongDateXG(strDate);

}else{

date = DateUtil.strToDateymdHHmmss(strDate);

}

}else{//不带时分秒

if(strDate.contains("-")){

date = DateUtil.strToDate(strDate);

}else if(strDate.contains("/")){

date = DateUtil.strToDateXG(strDate);

}else{

date = DateUtil.strToDateymd(strDate);

}

}

}

}catch(Exception e){

}

return date;

}

将长时间格式时间转换为字符串 yyyy-MM-dd HH:mm:ss

public static String dateToStrLong(Date dateDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String dateString = formatter.format(dateDate);

return dateString;

}

将长时间格式时间转换为字符串 yyyyMMddHHmmss

public static String dateToStrLong2(Date dateDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");

String dateString = formatter.format(dateDate);

return dateString;

}

将短时间格式时间转换为字符串 yyyy-MM-dd

public static String dateToStr(Date dateDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

String dateString = formatter.format(dateDate);

return dateString;

}

将短时间格式字符串转换为时间 yyyy-MM-dd

public static Date strToDate(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

将短时间格式字符串转换为时间 yyyy/MM/dd

public static Date strToDateXG(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

将短时间格式字符串转换为时间 yyyyMMdd

public static Date strToDateymd(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

将短时间格式字符串转换为时间 yyyyMMdd HH:mm:ss

public static Date strToDateymdHHmmss(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd HH:mm:ss");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

将短时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss

public static Date strToLongDate(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

将短时间格式字符串转换为时间yyyy/MM/dd HH:mm:ss

public static Date strToLongDateXG(String strDate) {

SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");

ParsePosition pos = new ParsePosition(0);

Date strtodate = formatter.parse(strDate, pos);

return strtodate;

}

得到当前年份

public static String getYear(){

        Calendar date = Calendar.getInstance();

        String year = String.valueOf(date.get(Calendar.YEAR));

        return year;

}

得到指定时间的上个月的年

public static int getLastMonthYear(Date date){

Calendar calendar = Calendar.getInstance();//日历对象 

        calendar.setTime(date);

        calendar.add(Calendar.MONTH, -1);//月份减一 

        int month = calendar.get(Calendar.MONTH)+1;

        return month;

}

得到指定时间的上个月

public static int getLastMonth(Date date){

Calendar calendar = Calendar.getInstance();//日历对象 

        calendar.setTime(date);

        calendar.add(Calendar.MONTH, -1);//月份减一 

        return calendar.get(Calendar.YEAR);

}

获取上月最后一天 yyyy-MM-dd HH:mm:ss

public static String getLastDay(Date date){

  //获取当前时间

  Calendar cal = Calendar.getInstance();

  cal.setTime(date);

  //下面可以设置月份，注：月份设置要减1，所以设置1月就是1-1，设置2月就是2-1，如此类推

  cal.set(Calendar.MONTH, 1-1);

  //调到上个月

  cal.add(Calendar.MONTH, -1);

  //得到一个月最最后一天日期(31/30/29/28)

  int MaxDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH);

  //按你的要求设置时间

  cal.set( cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), MaxDay, 23, 59, 59);

  //按格式输出

  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

  return sdf.format(cal.getTime());

}

获取上月第一天 yyyy-MM-dd HH:mm:ss

public static String getFirstDay(Date date){

获取前一个月第一天

        Calendar calendar1 = Calendar.getInstance();

        calendar1.setTime(date);

        calendar1.add(Calendar.MONTH, -1);

        calendar1.set(Calendar.DAY_OF_MONTH,1);

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        String firstDay = sdf.format(calendar1.getTime())+" 00:00:00";

        return firstDay;

}

得到现在小时

public static String getHour() {

Date currentTime = new Date();

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String dateString = formatter.format(currentTime);

String hour;

hour = dateString.substring(11, 13);

return hour;

}

得到现在分钟

public static String getTime() {

Date currentTime = new Date();

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String dateString = formatter.format(currentTime);

String min;

min = dateString.substring(14, 16);

return min;

}

获得指定日期的前一天

public static String getDayBefore(String specifiedDay) {

        Calendar c = Calendar.getInstance(); 

        Date date = null; 

        try { 

            date = new SimpleDateFormat("yyyy-MM-dd").parse(specifiedDay); 

        } catch (ParseException e) { 

            e.printStackTrace(); 

        } 

        c.setTime(date); 

        int day = c.get(Calendar.DATE); 

        c.set(Calendar.DATE, day - 1); 



        String dayBefore = new SimpleDateFormat("yyyy-MM-dd").format(c.getTime()); 

        return dayBefore; 

    } 

获得指定日期的后一天

public static String getDayAfter(String specifiedDay) {

        Calendar c = Calendar.getInstance(); 

        Date date = null; 

        try { 

            date = new SimpleDateFormat("yyyy-MM-dd").parse(specifiedDay); 

        } catch (ParseException e) { 

            e.printStackTrace(); 

        } 

        c.setTime(date); 

        int day = c.get(Calendar.DATE); 

        c.set(Calendar.DATE, day + 1); 



        String dayAfter = new SimpleDateFormat("yyyy-MM-dd") 

                .format(c.getTime()); 

        return dayAfter; 

    }

计算两个日期相差的天数

public static int getDifDay(Date date1,Date date2) throws ParseException{

    if(null == date1){

    return 0;

    }

    if(null == date2){

    return 0;

    }

    long from = date2.getTime();

    long to = date1.getTime();

    int days = (int) ((to - from)/(1000 * 60 * 60 * 24));

    return days;

    }

计算两个日期相差的天数

public static int getDifDay(String date1,String date2) throws ParseException{

    SimpleDateFormat simpleFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//如2016-08-10 20:40 

    Date fromDate = simpleFormat.parse(date2); 

    Date toDate = simpleFormat.parse(date1); 

    long from = fromDate.getTime();

    long to = toDate.getTime();

    int days = (int) ((to - from)/(1000 * 60 * 60 * 24));

    return days;

    }

获得指定日期的前N天

public static String getDayBefore(String specifiedDay,int days) {

        Calendar c = Calendar.getInstance(); 

        Date date = null; 

        try { 

            date = new SimpleDateFormat("yyyy-MM-dd").parse(specifiedDay); 

        } catch (ParseException e) { 

            e.printStackTrace(); 

        } 

        c.setTime(date); 

        int day = c.get(Calendar.DATE); 

        c.set(Calendar.DATE, day - days); 



        String dayBefore = new SimpleDateFormat("yyyy-MM-dd").format(c 

                .getTime()); 

        return dayBefore; 

    }

获得指定日期的后N天

public static String getDayAfter(String specifiedDay, int days) {

        Calendar c = Calendar.getInstance(); 

        Date date = null; 

        try { 

            date = new SimpleDateFormat("yyyy-MM-dd").parse(specifiedDay); 

        } catch (ParseException e) { 

            e.printStackTrace(); 

        } 

        c.setTime(date); 

        int day = c.get(Calendar.DATE); 

        c.set(Calendar.DATE, day + days); 



        String dayAfter = new SimpleDateFormat("yyyy-MM-dd") 

                .format(c.getTime()); 

        return dayAfter; 

    }

几分钟前的时间

public static Date getBeforeForDate(int minute){

    Date now = new Date();

    Date now_10 = new Date(now.getTime() - minute*60*1000); //10分钟前的时间

    return now_10;

    }