java获取各种时间 工具类

来源:互联网 发布:算法C 第四版 pdf 编辑:程序博客网 时间:2024/05/29 17:43

由于获取日期经常会使用到,所有我自己写了一个工具类

1、基本上能用上的都写出来了,包括:

1)获取当天的开始时间
2)获取当天的结束时间
3)获取昨天的开始时间
4)获取昨天的结束时间
5)获取明天的开始时间
6)获取明天的结束时间
7)获取本周的开始时间
8)获取本周的结束时间
9)获取上周的开始时间
10)获取上周的结束时间
11)获取本月的开始时间
12)获取本月的结束时间
13)获取上月的开始时间
14)获取上月的结束时间
15)获取本年的开始时间
16)获取本年的结束时间
17)获取某个日期的开始时间
18)获取某个日期的结束时间
19)获取今年是哪一年
20)获取本月是哪一月
21)两个日期相减得到的天数
22)两个日期相减得到的毫秒数
23)获取两个日期中的最大日期
24)获取两个日期中的最小日期
25)返回某月该季度的第一个月
26)返回某个日期下几天的日期
27)返回某个日期前几天的日期
28)获取某年某月到某年某月按天的切片日期集合(间隔天数的集合)
29)获取某年某月按天切片日期集合(某个月间隔多少天的日期集合)

2、直接上源码:

import java.sql.Timestamp;import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.List; public class DateUtils {     //获取当天的开始时间     public static java.util.Date getDayBegin() {         Calendar cal = new GregorianCalendar();         cal.set(Calendar.HOUR_OF_DAY, 0);         cal.set(Calendar.MINUTE, 0);         cal.set(Calendar.SECOND, 0);         cal.set(Calendar.MILLISECOND, 0);         return cal.getTime();     }     //获取当天的结束时间     public static java.util.Date getDayEnd() {         Calendar cal = new GregorianCalendar();         cal.set(Calendar.HOUR_OF_DAY, 23);         cal.set(Calendar.MINUTE, 59);         cal.set(Calendar.SECOND, 59);         return cal.getTime();     }     //获取昨天的开始时间     public static Date getBeginDayOfYesterday() {         Calendar cal = new GregorianCalendar();         cal.setTime(getDayBegin());         cal.add(Calendar.DAY_OF_MONTH, -1);         return cal.getTime();     }     //获取昨天的结束时间     public static Date getEndDayOfYesterDay() {         Calendar cal = new GregorianCalendar();         cal.setTime(getDayEnd());         cal.add(Calendar.DAY_OF_MONTH, -1);         return cal.getTime();     }     //获取明天的开始时间     public static Date getBeginDayOfTomorrow() {         Calendar cal = new GregorianCalendar();         cal.setTime(getDayBegin());         cal.add(Calendar.DAY_OF_MONTH, 1);         return cal.getTime();     }     //获取明天的结束时间     public static Date getEndDayOfTomorrow() {         Calendar cal = new GregorianCalendar();         cal.setTime(getDayEnd());         cal.add(Calendar.DAY_OF_MONTH, 1);         return cal.getTime();     }     //获取本周的开始时间     @SuppressWarnings("unused")    public static Date getBeginDayOfWeek() {         Date date = new Date();         if (date == null) {             return null;         }         Calendar cal = Calendar.getInstance();         cal.setTime(date);         int dayofweek = cal.get(Calendar.DAY_OF_WEEK);         if (dayofweek == 1) {             dayofweek += 7;         }         cal.add(Calendar.DATE, 2 - dayofweek);         return getDayStartTime(cal.getTime());     }     //获取本周的结束时间     public static Date getEndDayOfWeek(){         Calendar cal = Calendar.getInstance();         cal.setTime(getBeginDayOfWeek());         cal.add(Calendar.DAY_OF_WEEK, 6);         Date weekEndSta = cal.getTime();         return getDayEndTime(weekEndSta);     }     //获取上周的开始时间     @SuppressWarnings("unused")     public static Date getBeginDayOfLastWeek() {         Date date = new Date();         if (date == null) {             return null;         }         Calendar cal = Calendar.getInstance();         cal.setTime(date);         int dayofweek = cal.get(Calendar.DAY_OF_WEEK);         if (dayofweek == 1) {             dayofweek += 7;         }         cal.add(Calendar.DATE, 2 - dayofweek - 7);         return getDayStartTime(cal.getTime());     }     //获取上周的结束时间     public static Date getEndDayOfLastWeek(){         Calendar cal = Calendar.getInstance();         cal.setTime(getBeginDayOfLastWeek());         cal.add(Calendar.DAY_OF_WEEK, 6);         Date weekEndSta = cal.getTime();         return getDayEndTime(weekEndSta);     }     //获取本月的开始时间      public static Date getBeginDayOfMonth() {             Calendar calendar = Calendar.getInstance();             calendar.set(getNowYear(), getNowMonth() - 1, 1);             return getDayStartTime(calendar.getTime());         }     //获取本月的结束时间      public static Date getEndDayOfMonth() {             Calendar calendar = Calendar.getInstance();             calendar.set(getNowYear(), getNowMonth() - 1, 1);             int day = calendar.getActualMaximum(5);             calendar.set(getNowYear(), getNowMonth() - 1, day);             return getDayEndTime(calendar.getTime());         }      //获取上月的开始时间      public static Date getBeginDayOfLastMonth() {          Calendar calendar = Calendar.getInstance();          calendar.set(getNowYear(), getNowMonth() - 2, 1);          return getDayStartTime(calendar.getTime());      }      //获取上月的结束时间      public static Date getEndDayOfLastMonth() {          Calendar calendar = Calendar.getInstance();          calendar.set(getNowYear(), getNowMonth() - 2, 1);          int day = calendar.getActualMaximum(5);          calendar.set(getNowYear(), getNowMonth() - 2, day);          return getDayEndTime(calendar.getTime());      }      //获取本年的开始时间      public static java.util.Date getBeginDayOfYear() {             Calendar cal = Calendar.getInstance();             cal.set(Calendar.YEAR, getNowYear());             // cal.set             cal.set(Calendar.MONTH, Calendar.JANUARY);             cal.set(Calendar.DATE, 1);             return getDayStartTime(cal.getTime());         }      //获取本年的结束时间      public static java.util.Date getEndDayOfYear() {             Calendar cal = Calendar.getInstance();             cal.set(Calendar.YEAR, getNowYear());             cal.set(Calendar.MONTH, Calendar.DECEMBER);             cal.set(Calendar.DATE, 31);             return getDayEndTime(cal.getTime());         }     //获取某个日期的开始时间     public static Timestamp getDayStartTime(Date d) {         Calendar calendar = Calendar.getInstance();         if(null != d) calendar.setTime(d);         calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),    calendar.get(Calendar.DAY_OF_MONTH), 0, 0, 0);         calendar.set(Calendar.MILLISECOND, 0);         return new Timestamp(calendar.getTimeInMillis());     }     //获取某个日期的结束时间     public static Timestamp getDayEndTime(Date d) {         Calendar calendar = Calendar.getInstance();         if(null != d) calendar.setTime(d);         calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),    calendar.get(Calendar.DAY_OF_MONTH), 23, 59, 59);         calendar.set(Calendar.MILLISECOND, 999);         return new Timestamp(calendar.getTimeInMillis());     }     //获取今年是哪一年      public static Integer getNowYear() {              Date date = new Date();             GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();             gc.setTime(date);             return Integer.valueOf(gc.get(1));         }      //获取本月是哪一月      public static int getNowMonth() {              Date date = new Date();             GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();             gc.setTime(date);             return gc.get(2) + 1;         }      //两个日期相减得到的天数      public static int getDiffDays(Date beginDate, Date endDate) {             if (beginDate == null || endDate == null) {                 throw new IllegalArgumentException("getDiffDays param is null!");             }             long diff = (endDate.getTime() - beginDate.getTime())                     / (1000 * 60 * 60 * 24);             int days = new Long(diff).intValue();             return days;         }     //两个日期相减得到的毫秒数      public static long dateDiff(Date beginDate, Date endDate) {             long date1ms = beginDate.getTime();             long date2ms = endDate.getTime();             return date2ms - date1ms;         }      //获取两个日期中的最大日期      public static Date max(Date beginDate, Date endDate) {             if (beginDate == null) {                 return endDate;             }             if (endDate == null) {                 return beginDate;             }             if (beginDate.after(endDate)) {                 return beginDate;             }             return endDate;         }      //获取两个日期中的最小日期      public static Date min(Date beginDate, Date endDate) {             if (beginDate == null) {                 return endDate;             }             if (endDate == null) {                 return beginDate;             }             if (beginDate.after(endDate)) {                 return endDate;             }             return beginDate;         }      //返回某月该季度的第一个月      public static Date getFirstSeasonDate(Date date) {              final int[] SEASON = { 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4 };             Calendar cal = Calendar.getInstance();             cal.setTime(date);             int sean = SEASON[cal.get(Calendar.MONTH)];             cal.set(Calendar.MONTH, sean * 3 - 3);             return cal.getTime();         }      //返回某个日期下几天的日期      public static Date getNextDay(Date date, int i) {             Calendar cal = new GregorianCalendar();             cal.setTime(date);             cal.set(Calendar.DATE, cal.get(Calendar.DATE) + i);             return cal.getTime();         }      //返回某个日期前几天的日期      public static Date getFrontDay(Date date, int i) {             Calendar cal = new GregorianCalendar();             cal.setTime(date);             cal.set(Calendar.DATE, cal.get(Calendar.DATE) - i);             return cal.getTime();         }      //获取某年某月到某年某月按天的切片日期集合(间隔天数的集合)      @SuppressWarnings({ "rawtypes", "unchecked" })    public static List getTimeList(int beginYear, int beginMonth, int endYear,                 int endMonth, int k) {             List list = new ArrayList();             if (beginYear == endYear) {                 for (int j = beginMonth; j <= endMonth; j++) {                     list.add(getTimeList(beginYear, j, k));                 }             } else {                 {                     for (int j = beginMonth; j < 12; j++) {                         list.add(getTimeList(beginYear, j, k));                     }                     for (int i = beginYear + 1; i < endYear; i++) {                         for (int j = 0; j < 12; j++) {                             list.add(getTimeList(i, j, k));                         }                     }                     for (int j = 0; j <= endMonth; j++) {                         list.add(getTimeList(endYear, j, k));                     }                 }             }             return list;         }      //获取某年某月按天切片日期集合(某个月间隔多少天的日期集合)      @SuppressWarnings({ "unchecked", "rawtypes" })    public static List getTimeList(int beginYear, int beginMonth, int k) {             List list = new ArrayList();             Calendar begincal = new GregorianCalendar(beginYear, beginMonth, 1);             int max = begincal.getActualMaximum(Calendar.DATE);             for (int i = 1; i < max; i = i + k) {                 list.add(begincal.getTime());                 begincal.add(Calendar.DATE, k);             }             begincal = new GregorianCalendar(beginYear, beginMonth, max);             list.add(begincal.getTime());             return list;         }}
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291

3、小提示

由于为了以后使用方便,所有方法的返回类型都设为了 java.util.Date
请在使用时根据自己的需要进行日期格式化处理,如:

import java.text.SimpleDateFormat;SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String todayBegin = simpleDateFormat.format(DateUtils.getDayBegin());System.out.println(todayBegin );//输出结果为2017-10-26 00:00:00
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
(function () {('pre.prettyprint code').each(function () { var lines = (this).text().split(\n).length;varnumbering = $('
    ').addClass('pre-numbering').hide(); (this).addClass(hasnumbering).parent().append(numbering); for (i = 1; i
原创粉丝点击