| 提交 | 用户 | age | ||
| a6a76f | 1 | package com.yc.utils; |
| F | 2 | |
| 3 | ||
| 4 | import java.text.DateFormat; | |
| 5 | import java.text.ParseException; | |
| 6 | import java.text.SimpleDateFormat; | |
| 7 | import java.time.LocalDate; | |
| 8 | import java.time.format.DateTimeFormatter; | |
| 9 | import java.util.Calendar; | |
| 10 | import java.util.Date; | |
| 11 | import java.util.Locale; | |
| 12 | import java.util.regex.Pattern; | |
| 13 | /** | |
| 14 | * 日期操作 | |
| 15 | * | |
| 16 | * **/ | |
| 17 | public class DateUtil { | |
| 18 | public static String dateFormatStr = "yyyy-MM-dd HH:mm:ss" ; | |
| 19 | /** | |
| 20 | * 格式化时间 | |
| 21 | * @param time 毫秒数 | |
| 22 | * @param format 日期格式，传null则默认为yyyy-MM-dd HH:mm:ss | |
| 23 | * **/ | |
| 24 | public static String fromatDate(long time,String format){ | |
| 25 | if(format==null) format="yyyy-MM-dd HH:mm:ss"; | |
| 26 | Calendar c=Calendar.getInstance(); | |
| 27 | c.setTimeInMillis(time); | |
| 28 | SimpleDateFormat sim=new SimpleDateFormat(format); | |
| 29 | return sim.format(c.getTime()); | |
| 30 | } | |
| 31 | /** | |
| 32 | * 计算相差天数 | |
| 33 | * | |
| 34 | * */ | |
| 35 | public static int daysBetween(Date now, Date returnDate) { | |
| 36 | Calendar cNow = Calendar.getInstance(); | |
| 37 | Calendar cReturnDate = Calendar.getInstance(); | |
| 38 | cNow.setTime(now); | |
| 39 | cReturnDate.setTime(returnDate); | |
| 40 | setTimeToMidnight(cNow); | |
| 41 | setTimeToMidnight(cReturnDate); | |
| 42 | long todayMs = cNow.getTimeInMillis(); | |
| 43 | long returnMs = cReturnDate.getTimeInMillis(); | |
| 44 | long intervalMs = todayMs - returnMs; | |
| 45 | return millisecondsToDays(intervalMs); | |
| 46 | } | |
| 47 | /** | |
| 48 | * 计算相差天数 | |
| 49 | * | |
| 50 | * */ | |
| 51 | public static int day2one(String returnDate) { | |
| 52 | ||
| 53 | SimpleDateFormat sim=new SimpleDateFormat("yyyy-MM-dd"); | |
| 54 | try { | |
| 55 | Date vaiDate= sim.parse(returnDate); | |
| 56 | Date now =new Date(); | |
| 57 | return vaiDate.compareTo(now); | |
| 58 | } catch (ParseException e) { | |
| 59 | e.printStackTrace(); | |
| 60 | return -1; | |
| 61 | } | |
| 62 | ||
| 63 | } | |
| 64 | private static int millisecondsToDays(long intervalMs) { | |
| 65 | return (int) (intervalMs / (1000 * 86400)); | |
| 66 | } | |
| 67 | ||
| 68 | private static void setTimeToMidnight(Calendar calendar) { | |
| 69 | calendar.set(Calendar.HOUR_OF_DAY, 0); | |
| 70 | calendar.set(Calendar.MINUTE, 0); | |
| 71 | calendar.set(Calendar.SECOND, 0); | |
| 72 | } | |
| 73 | public static void main(String[] args) | |
| 74 | { | |
| 75 | // SimpleDateFormat sdf=new SimpleDateFormat("yy-MM-dd HH:mm:ss",Locale.getDefault()); | |
| 76 | // System.out.print(DateUtil.getMonth(0)); | |
| 77 | System.out.println(DateUtil.DatePlus("2014-9-1",2)); | |
| 78 | } | |
| 79 | public static String formatDate(String date,String fromt){ | |
| 80 | if(fromt==null) fromt="yyyy-mm-dd"; | |
| b7dee0 | 81 | SimpleDateFormat sim=new SimpleDateFormat(fromt,Locale.SIMPLIFIED_CHINESE); |
| a6a76f | 82 | Date d=null; |
| F | 83 | try { |
| 84 | ||
| 85 | d = sim.parse(date); | |
| 86 | } catch (ParseException e) { | |
| 87 | e.printStackTrace(); | |
| 88 | } | |
| b7dee0 | 89 | return sim.format(d);//只返回日期部分 |
| a6a76f | 90 | } |
| e0b42d | 91 | public static String formatDateTime(String date,String format){ |
| F | 92 | if(format==null) format="yyyy-MM-dd HH:mm:ss"; |
| 93 | SimpleDateFormat sim=new SimpleDateFormat(format); | |
| 94 | Date d=null; | |
| 95 | try { | |
| a6a76f | 96 | |
| e0b42d | 97 | d = sim.parse(date); |
| F | 98 | } catch (ParseException e) { |
| 99 | e.printStackTrace(); | |
| 100 | } | |
| b7dee0 | 101 | return sim.format(d);//只返回日期+时间部分 |
| e0b42d | 102 | } |
| a6a76f | 103 | /** |
| F | 104 | * |
| 105 | * @param dateStr --只能接收日期， | |
| 106 | * @param days | |
| 107 | * @return | |
| 108 | */ | |
| 109 | public static String DatePlus(String dateStr,int days){ | |
| 110 | LocalDate date=null; | |
| 111 | try { | |
| 112 | date = LocalDate.parse(dateStr); | |
| 113 | }catch (Exception e){ | |
| 114 | //月份前面没有0 | |
| 115 | try { | |
| 116 | date = LocalDate.parse(dateStr, DateTimeFormatter.ofPattern("yyyy-M-dd")); | |
| 117 | ||
| 118 | }catch (Exception e1){ | |
| 119 | try { | |
| 120 | date = LocalDate.parse(dateStr, DateTimeFormatter.ofPattern("yyyy-M-d")); | |
| 121 | }catch (Exception e2){ | |
| 122 | try { | |
| 123 | date = LocalDate.parse(dateStr, DateTimeFormatter.ofPattern("yyyy-MM-d")); | |
| 124 | }catch (Exception e3){ | |
| 125 | date = LocalDate.parse(dateStr, DateTimeFormatter.ofPattern("yyyy-MM-dd")); | |
| 126 | } | |
| 127 | } | |
| 128 | } | |
| 129 | } | |
| 130 | return date.plusDays(days).format(DateTimeFormatter.ofPattern("yyyy-MM-dd")); | |
| 131 | } | |
| 132 | public static String toDayDate(){ | |
| 133 | Date today=Calendar.getInstance().getTime();//返回当前中国地区的日期 | |
| 134 | String parnt = "yyyy-MM-dd"; | |
| 135 | SimpleDateFormat simpleDateFormat=new SimpleDateFormat(parnt); | |
| 136 | return simpleDateFormat.format(today);//只返回日期部分 | |
| 137 | } | |
| 138 | public static String toDayTime(){ | |
| 139 | Date today=Calendar.getInstance().getTime();//返回当前中国地区的时间 | |
| 140 | String parnt = "HH:mm:ss"; | |
| 141 | SimpleDateFormat simpleDateFormat=new SimpleDateFormat(parnt); | |
| 142 | return simpleDateFormat.format(today);//只返回时间部分 | |
| 143 | } | |
| 144 | public static String toDay(){ | |
| 145 | Date today=Calendar.getInstance().getTime();//返回当前中国地区的日期+时间 | |
| 146 | String parnt = "yyyy-MM-dd HH:mm:ss"; | |
| 147 | SimpleDateFormat simpleDateFormat=new SimpleDateFormat(parnt); | |
| 148 | return simpleDateFormat.format(today);//只返回时间部分 | |
| 149 | } | |
| 150 | public static int getDay(int i){ | |
| 151 | Calendar cal=Calendar.getInstance(Locale.CHINA);//返回当前中国地区的日期时间 | |
| 152 | cal.set(Calendar.DAY_OF_MONTH,cal.get(Calendar.DAY_OF_MONTH)+i);// | |
| 153 | return cal.get(Calendar.DATE);//只日期中的天部分 | |
| 154 | } | |
| 155 | public static int getMonth(int i){ | |
| 156 | Calendar cal=Calendar.getInstance(Locale.CHINA);//返回当前中国地区的日期时间 | |
| 157 | cal.set(Calendar.MONTH,cal.get(Calendar.MONTH)+i+1);// | |
| 158 | return cal.get(Calendar.MONTH);//只日期中的月部分 | |
| 159 | } | |
| 160 | public static int getYear(int i){ | |
| 161 | Calendar cal=Calendar.getInstance(Locale.CHINA);//返回当前中国地区的日期时间 | |
| 162 | cal.set(Calendar.YEAR,cal.get(Calendar.YEAR)+i);// | |
| 163 | return cal.get(Calendar.YEAR);//只日期中的年部分 | |
| 164 | } | |
| 165 | ||
| 166 | public static boolean isDate(String d){//判断字符串是否为日期 | |
| 167 | ||
| 168 | Pattern p = Pattern.compile("^((\\d{2}(([02468][048])|([13579][26]))[\\-\\-\\s]?((((0?" +"[13578])|(1[02]))[\\-\\-\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))" +"|(((0?[469])|(11))[\\-\\-\\s]?((0?[1-9])|([1-2][0-9])|(30)))|" +"(0?2[\\-\\-\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][12" +"35679])|([13579][01345789]))[\\-\\-\\s]?((((0?[13578])|(1[02]))" +"[\\-\\-\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))" +"[\\-\\-\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\-\\s]?((0?[" +"1-9])|(1[0-9])|(2[0-8]))))))"); | |
| 169 | return p.matcher(d).matches(); | |
| 170 | } | |
| 171 | /* | |
| 172 | * 判断是否为浮点数，包括double和float | |
| 173 | * @param str 传入的字符串 | |
| 174 | * @return 是浮点数返回true,否则返回false | |
| 175 | */ | |
| 176 | public static boolean isDouble(String str) { | |
| 177 | Pattern pattern = Pattern.compile("^[-\\+]?[.\\d]*$"); | |
| 178 | return pattern.matcher(str).matches(); | |
| 179 | } | |
| 180 | } | |
