1 import java.sql.Timestamp;
2 import java.util.ArrayList;
3 import java.util.Calendar;
4 import java.util.Date;
5 import java.util.GregorianCalendar;
6 import java.util.List;
7
8 public class DateUtils {
9 // 获取当天的开始时间
10 public static java.util.Date getDayBegin() {
11 Calendar cal = new GregorianCalendar();
12 cal.set(Calendar.HOUR_OF_DAY, 0);
13 cal.set(Calendar.MINUTE, 0);
14 cal.set(Calendar.SECOND, 0);
15 cal.set(Calendar.MILLISECOND, 0);
16 return cal.getTime();
17 }
18
19 // 获取当天的结束时间
20 public static java.util.Date getDayEnd() {
21 Calendar cal = new GregorianCalendar();
22 cal.set(Calendar.HOUR_OF_DAY, 23);
23 cal.set(Calendar.MINUTE, 59);
24 cal.set(Calendar.SECOND, 59);
25 return cal.getTime();
26 }
27
28 // 获取昨天的开始时间
29 public static Date getBeginDayOfYesterday() {
30 Calendar cal = new GregorianCalendar();
31 cal.setTime(getDayBegin());
32 cal.add(Calendar.DAY_OF_MONTH, -1);
33 return cal.getTime();
34 }
35
36 // 获取昨天的结束时间
37 public static Date getEndDayOfYesterDay() {
38 Calendar cal = new GregorianCalendar();
39 cal.setTime(getDayEnd());
40 cal.add(Calendar.DAY_OF_MONTH, -1);
41 return cal.getTime();
42 }
43
44 // 获取明天的开始时间
45 public static Date getBeginDayOfTomorrow() {
46 Calendar cal = new GregorianCalendar();
47 cal.setTime(getDayBegin());
48 cal.add(Calendar.DAY_OF_MONTH, 1);
49
50 return cal.getTime();
51 }
52
53 // 获取明天的结束时间
54 public static Date getEndDayOfTomorrow() {
55 Calendar cal = new GregorianCalendar();
56 cal.setTime(getDayEnd());
57 cal.add(Calendar.DAY_OF_MONTH, 1);
58 return cal.getTime();
59 }
60
61 // 获取本周的开始时间
62 public static Date getBeginDayOfWeek() {
63 Date date = new Date();
64 if (date == null) {
65 return null;
66 }
67 Calendar cal = Calendar.getInstance();
68 cal.setTime(date);
69 int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
70 if (dayofweek == 1) {
71 dayofweek += 7;
72 }
73 cal.add(Calendar.DATE, 2 - dayofweek);
74 return getDayStartTime(cal.getTime());
75 }
76
77 // 获取本周的结束时间
78 public static Date getEndDayOfWeek() {
79 Calendar cal = Calendar.getInstance();
80 cal.setTime(getBeginDayOfWeek());
81 cal.add(Calendar.DAY_OF_WEEK, 6);
82 Date weekEndSta = cal.getTime();
83 return getDayEndTime(weekEndSta);
84 }
85
86 // 获取本月的开始时间
87 public static Date getBeginDayOfMonth() {
88 Calendar calendar = Calendar.getInstance();
89 calendar.set(getNowYear(), getNowMonth() - 1, 1);
90 return getDayStartTime(calendar.getTime());
91 }
92
93 // 获取本月的结束时间
94 public static Date getEndDayOfMonth() {
95 Calendar calendar = Calendar.getInstance();
96 calendar.set(getNowYear(), getNowMonth() - 1, 1);
97 int day = calendar.getActualMaximum(5);
98 calendar.set(getNowYear(), getNowMonth() - 1, day);
99 return getDayEndTime(calendar.getTime());
100 }
101
102 // 获取上个月的开始时间
103 public static Date getBeginDayOfLastMonth() {
104 Date date = new Date();
105 Calendar calendar = Calendar.getInstance();
106 calendar.setTime(date);
107 calendar.add(calendar.MONTH, -1);
108 calendar.set(calendar.DAY_OF_MONTH, 1);
109 return getDayStartTime(calendar.getTime());
110 }
111
112 // 获取上个月的结束时间
113 public static Date getEndDayOfLastMonth() {
114 Date date = new Date();
115 Calendar calendar = Calendar.getInstance();
116 calendar.setTime(date);
117 calendar.add(calendar.MONTH, -1);
118 int day = calendar.getActualMaximum(5);
119 calendar.set(calendar.DAY_OF_MONTH, day);
120 return getDayEndTime(calendar.getTime());
121 }
122
123 // 获取本年的开始时间
124 public static java.util.Date getBeginDayOfYear() {
125 Calendar cal = Calendar.getInstance();
126 cal.set(Calendar.YEAR, getNowYear());
127 // cal.set
128 cal.set(Calendar.MONTH, Calendar.JANUARY);
129 cal.set(Calendar.DATE, 1);
130
131 return getDayStartTime(cal.getTime());
132 }
133
134 // 获取本年的结束时间
135 public static java.util.Date getEndDayOfYear() {
136 Calendar cal = Calendar.getInstance();
137 cal.set(Calendar.YEAR, getNowYear());
138 cal.set(Calendar.MONTH, Calendar.DECEMBER);
139 cal.set(Calendar.DATE, 31);
140 return getDayEndTime(cal.getTime());
141 }
142
143 // 获取某个日期的开始时间
144 public static Timestamp getDayStartTime(Date d) {
145 Calendar calendar = Calendar.getInstance();
146 if (null != d)
147 calendar.setTime(d);
148 calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 0,
149 0, 0);
150 calendar.set(Calendar.MILLISECOND, 0);
151 return new Timestamp(calendar.getTimeInMillis());
152 }
153
154 // 获取某个日期的结束时间
155 public static Timestamp getDayEndTime(Date d) {
156 Calendar calendar = Calendar.getInstance();
157 if (null != d)
158 calendar.setTime(d);
159 calendar.set(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH), 23,
160 59, 59);
161 calendar.set(Calendar.MILLISECOND, 999);
162 return new Timestamp(calendar.getTimeInMillis());
163 }
164
165 // 获取今年是哪一年
166 public static Integer getNowYear() {
167 Date date = new Date();
168 GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
169 gc.setTime(date);
170 return Integer.valueOf(gc.get(1));
171 }
172
173 // 获取本月是哪一月
174 public static int getNowMonth() {
175 Date date = new Date();
176 GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
177 gc.setTime(date);
178 return gc.get(2) + 1;
179 }
180
181 // 两个日期相减得到的天数
182 public static int getDiffDays(Date beginDate, Date endDate) {
183
184 if (beginDate == null || endDate == null) {
185 throw new IllegalArgumentException("getDiffDays param is null!");
186 }
187
188 long diff = (endDate.getTime() - beginDate.getTime()) / (1000 * 60 * 60 * 24);
189
190 int days = new Long(diff).intValue();
191
192 return days;
193 }
194
195 // 两个日期相减得到的毫秒数
196 public static long dateDiff(Date beginDate, Date endDate) {
197 long date1ms = beginDate.getTime();
198 long date2ms = endDate.getTime();
199 return date2ms - date1ms;
200 }
201
202 // 获取两个日期中的最大日期
203 public static Date max(Date beginDate, Date endDate) {
204 if (beginDate == null) {
205 return endDate;
206 }
207 if (endDate == null) {
208 return beginDate;
209 }
210 if (beginDate.after(endDate)) {
211 return beginDate;
212 }
213 return endDate;
214 }
215
216 // 获取两个日期中的最小日期
217 public static Date min(Date beginDate, Date endDate) {
218 if (beginDate == null) {
219 return endDate;
220 }
221 if (endDate == null) {
222 return beginDate;
223 }
224 if (beginDate.after(endDate)) {
225 return endDate;
226 }
227 return beginDate;
228 }
229
230 // 返回某月该季度的第一个月
231 public static Date getFirstSeasonDate(Date date) {
232 final int[] SEASON = { 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4 };
233 Calendar cal = Calendar.getInstance();
234 cal.setTime(date);
235 int sean = SEASON[cal.get(Calendar.MONTH)];
236 cal.set(Calendar.MONTH, sean * 3 - 3);
237 return cal.getTime();
238 }
239
240 // 返回某个日期下几天的日期
241 public static Date getNextDay(Date date, int i) {
242 Calendar cal = new GregorianCalendar();
243 cal.setTime(date);
244 cal.set(Calendar.DATE, cal.get(Calendar.DATE) + i);
245 return cal.getTime();
246 }
247
248 // 返回某个日期前几天的日期
249 public static Date getFrontDay(Date date, int i) {
250 Calendar cal = new GregorianCalendar();
251 cal.setTime(date);
252 cal.set(Calendar.DATE, cal.get(Calendar.DATE) - i);
253 return cal.getTime();
254 }
255
256 // 获取某年某月到某年某月按天的切片日期集合（间隔天数的日期集合）
257 public static List getTimeList(int beginYear, int beginMonth, int endYear, int endMonth, int k) {
258 List list = new ArrayList();
259 if (beginYear == endYear) {
260 for (int j = beginMonth; j <= endMonth; j++) {
261 list.add(getTimeList(beginYear, j, k));
262
263 }
264 } else {
265 {
266 for (int j = beginMonth; j < 12; j++) {
267 list.add(getTimeList(beginYear, j, k));
268 }
269
270 for (int i = beginYear + 1; i < endYear; i++) {
271 for (int j = 0; j < 12; j++) {
272 list.add(getTimeList(i, j, k));
273 }
274 }
275 for (int j = 0; j <= endMonth; j++) {
276 list.add(getTimeList(endYear, j, k));
277 }
278 }
279 }
280 return list;
281 }
282
283 // 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）
284 public static List getTimeList(int beginYear, int beginMonth, int k) {
285 List list = new ArrayList();
286 Calendar begincal = new GregorianCalendar(beginYear, beginMonth, 1);
287 int max = begincal.getActualMaximum(Calendar.DATE);
288 for (int i = 1; i < max; i = i + k) {
289 list.add(begincal.getTime());
290 begincal.add(Calendar.DATE, k);
291 }
292 begincal = new GregorianCalendar(beginYear, beginMonth, max);
293 list.add(begincal.getTime());
294 return list;
295 }
296
297 // 获取某年某月的第一天日期
298 public static Date getStartMonthDate(int year, int month) {
299 Calendar calendar = Calendar.getInstance();
300 calendar.set(year, month - 1, 1, 0, 0, 0);
301 return calendar.getTime();
302 }
303
304 // 获取某年某月的最后一天日期
305 public static Date getEndMonthDate(int year, int month) {
306 Calendar calendar = Calendar.getInstance();
307 calendar.set(year, month - 1, 1);
308 int day = calendar.getActualMaximum(5);
309 calendar.set(year, month - 1, day, 23, 59, 59);
310 return calendar.getTime();
311 }
312 }
/**
* 获取某年某月的第一天日期
*/
private Date getStartMonthDate(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1,0,0,0);
return calendar.getTime();
}
/**
* 获取某年某月的最后一天日期
*/
private Date getEndMonthDate(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1);
int day = calendar.getActualMaximum(5);
calendar.set(year, month - 1, day,23,59,59);
return calendar.getTime();
}
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