1 package com.mall.common;
2
3 import java.text.ParseException;
4 import java.text.SimpleDateFormat;
5 import java.util.ArrayList;
6 import java.util.Calendar;
7 import java.util.Date;
8 import java.util.List;
9
10 import org.apache.log4j.Logger;
11
12
13 public class DateUtils {
14 private static Logger log=Logger.getLogger(DateUtils.class);
15
16 /**
17 * 获取昨天日期
18 *
19 * @param date
20 * @return
21 */
22 public static String getYesterDay(Date date) {
23
24 java.text.Format formatter = new java.text.SimpleDateFormat(
25 "yyyy-MM-dd");
26
27 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60;
28
29 date.setTime(beforeTime * 1000);
30
31 return formatter.format(date);
32
33 }
34
35 /**
36 * 获取昨天日期(返回数值)
37 *
38 * @param date
39 * @return num
40 */
41 public static Integer getYesterDayNum(Date date) {
42
43 java.text.Format formatter = new java.text.SimpleDateFormat("yyyyMMdd");
44
45 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60;
46
47 date.setTime(beforeTime * 1000);
48
49 return Integer.parseInt(formatter.format(date));
50
51 }
52
53 /**
54 * 获取一周前的日期(当前日期往前推7天)
55 *
56 * @param date
57 * @return
58 */
59 public static String getWeekdayBeforeDate(Date date) {
60
61 java.text.Format formatter = new java.text.SimpleDateFormat(
62 "yyyy-MM-dd");
63
64 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60 * 7;
65
66 date.setTime(beforeTime * 1000);
67
68 return formatter.format(date);
69
70 }
71
72 /**
73 * 获取一周前的日期(当前日期往前推7天)(返回数值)
74 *
75 * @param date
76 * @return
77 */
78 public static Integer getWeekdayBeforeDateNum(Date date) {
79
80 java.text.Format formatter = new java.text.SimpleDateFormat("yyyyMMdd");
81
82 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60 * 7;
83
84 date.setTime(beforeTime * 1000);
85
86 return Integer.parseInt(formatter.format(date));
87
88 }
89
90 /**
91 * 获取一月前的日期(当前日期往前推30天)
92 *
93 * @param date
94 * @return
95 */
96 public static String getMonthBeforeDate(Date date) {
97
98 java.text.Format formatter = new java.text.SimpleDateFormat(
99 "yyyy-MM-dd");
100
101 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60 * 30;
102
103 date.setTime(beforeTime * 1000);
104
105 return formatter.format(date);
106
107 }
108
109 /**
110 * 获取一月前的日期(当前日期往前推30天)(返回数值)
111 *
112 * @param date
113 * @return
114 */
115 public static Integer getMonthBeforeDateNum(Date date) {
116
117 java.text.Format formatter = new java.text.SimpleDateFormat("yyyyMMdd");
118
119 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60 * 30;
120
121 date.setTime(beforeTime * 1000);
122
123 return Integer.parseInt(formatter.format(date));
124
125 }
126
127 /**
128 * 获取三月前的日期(当前日期往前推90天)
129 *
130 * @param date
131 * @return
132 */
133 public static String get3MonthBeforeDate(Date date) {
134
135 java.text.Format formatter = new java.text.SimpleDateFormat(
136 "yyyy-MM-dd");
137
138 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60 * 30 * 3;
139
140 date.setTime(beforeTime * 1000);
141
142 String d = formatter.format(date);
143 return d;
144 }
145
146 /**
147 * 获取三月前的日期(当前日期往前推30天)(返回数值)
148 *
149 * @param date
150 * @return
151 */
152 public static Integer get3MonthBeforeDateNum(Date date) {
153
154 java.text.Format formatter = new java.text.SimpleDateFormat("yyyyMMdd");
155
156 long beforeTime = (date.getTime() / 1000) - 24 * 60 * 60 * 30 * 3;
157
158 date.setTime(beforeTime * 1000);
159
160 return Integer.parseInt(formatter.format(date));
161
162 }
163
164 /**
165 * 获取一年后的日期
166 *
167 * @return
168 */
169 public static String getNextYear(int chooseYear, Date date) {
170
171 java.text.Format formatter = new java.text.SimpleDateFormat(
172 "yyyy-MM-dd");
173
174 long beforeTime = (date.getTime() / 1000) + 60 * 60 * 24 * 365
175 * chooseYear;
176
177 date.setTime(beforeTime * 1000);
178
179 return formatter.format(date);
180 }
181
182 /**
183 * 日期转换成字符串
184 *
185 * @param date
186 * @return
187 */
188 public static String convertDateToStr(Date date) {
189 java.text.Format formatter = new java.text.SimpleDateFormat(
190 "yyyy-MM-dd");
191 return formatter.format(date);
192
193 }
194
195 /**
196 * 日期转换成字符串 yyyy-MM-dd HHmmss
197 *
198 * @param date
199 * @return
200 */
201 public static String convertTimeToStr(Date date) {
202 java.text.Format formatter = new java.text.SimpleDateFormat(
203 "yyyy-MM-dd HH:mm:ss");
204 return formatter.format(date);
205
206 }
207
208 /**
209 * 将日期转为数值
210 *
211 * @param date
212 * @return
213 */
214 public static Integer convertDateToNum(Date date) {
215 java.text.Format formatter = new java.text.SimpleDateFormat("yyyyMMdd");
216 return Integer.parseInt(formatter.format(date));
217 }
218 /**
219 * 将字符串日期转为数值
220 *
221 * @param date
222 * @return
223 */
224 public static Integer convertStrToNum(String date) {
225
226 if (date.contains("-")) {
227 date = date.replace("-", "");
228 } else if (date.contains(".")) {
229 date = date.replace(".", "");
230 } else if (date.contains("/")) {
231 date = date.replace("/", "");
232 }
233
234 return Integer.parseInt(date);
235 }
236
237 /**
238 * 时间转换器 第一个参数 要转化的数据类型 --- java.util.Date 第二个参数 要转化的数据 --- "2010-12-12"
239 *
240 */
241 public static Date convertStrTODate( String str,Class<Date> type,String datePattern) {
242
243 if (str == null) {
244 return null;
245 } else {
246 if (type == java.util.Date.class) {
247 if (str instanceof String) {
248 try {
249 SimpleDateFormat sdf = new SimpleDateFormat(datePattern);
250 return sdf.parse(str);
251 } catch (ParseException e) {
252 throw new RuntimeException("您输入的数据格式不对");
253 }
254 } else {
255 throw new RuntimeException("您要转化的数据输入不是String类型");
256 }
257 } else {
258 throw new RuntimeException("您要转化的数据类型不对");
259 }
260 }
261 }
262
263 /**
264 * 根据生日计算年龄
265 *
266 * @param birthDay
267 * @return
268 * @throws Exception
269 */
270 public static int getAge(Date birthDay) throws Exception {
271 Calendar cal = Calendar.getInstance();
272
273 if (cal.before(birthDay)) {
274 throw new IllegalArgumentException(
275 "The birthDay is before Now.It's unbelievable!");
276 }
277 int yearNow = cal.get(Calendar.YEAR);
278 int monthNow = cal.get(Calendar.MONTH);
279 int dayOfMonthNow = cal.get(Calendar.DAY_OF_MONTH);
280 cal.setTime(birthDay);
281
282 int yearBirth = cal.get(Calendar.YEAR);
283 int monthBirth = cal.get(Calendar.MONTH);
284 int dayOfMonthBirth = cal.get(Calendar.DAY_OF_MONTH);
285
286 int age = yearNow - yearBirth;
287
288 if (monthNow <= monthBirth) {
289 if (monthNow == monthBirth) {
290 // monthNow==monthBirth
291 if (dayOfMonthNow < dayOfMonthBirth) {
292 age--;
293 } else {
294 // do nothing
295 }
296 } else {
297 // monthNow>monthBirth
298 age--;
299 }
300 } else {
301 // monthNow<monthBirth
302 // donothing
303 }
304
305 return age;
306 }
307 ///////////////////////////////////////根据时间段获取时间的集合//////////////////////////////////////////////////////////////////
308 public static List<String> getDateListBydates(String s1,String s2,String format) throws ParseException{
309 List<String>list=new ArrayList<String>();
310 //String s1 = "2012-02-01";
311 //String s2 = "2012-04-04";
312 SimpleDateFormat sdf = new SimpleDateFormat(format);
313 Date begin=sdf.parse(s1);
314 Date end=sdf.parse(s2);
315 double between=(end.getTime()-begin.getTime())/1000;//除以1000是为了转换成秒
316 double day=between/(24*3600);
317 for(int i = 0;i<=day;i++){
318 Calendar cd = Calendar.getInstance();
319 cd.setTime(sdf.parse(s1));
320 cd.add(Calendar.DATE, i);//增加一天
321 //cd.add(Calendar.MONTH, n);//增加一个月
322 log.info(sdf.format(cd.getTime()));
323 list.add(sdf.format(cd.getTime()));
324 }
325 return list;
326 }
327 //获取指定年月的总天数
328 public static int getLastDay(int year, int month) {
329 int day = 1;
330 Calendar cal = Calendar.getInstance();
331 cal.set(year,month - 1,day);
332 int last = cal.getActualMaximum(Calendar.DATE);
333 System.out.println(last);
334 return last;
335 }
336 //获取指定年月的日期
337 @SuppressWarnings("unchecked")
338 public static List<String> getDatesByMonth(int year, int month){
339 List<String> list=new ArrayList();
340 String yyyy=year+"";
341 String mm=month+"";
342 String dd="01";
343 if(month<10){
344 mm="0"+month;
345 }
346 int num=getLastDay(year, month);
347 for(int i=1;i<=num;i++){
348 if(i<10){
349 dd="0"+i;
350 }else{
351 dd=i+"";
352 }
353 list.add(yyyy+"-"+mm+"-"+dd);
354 System.out.println(yyyy+"-"+mm+"-"+dd);
355 }
356 return list;
357 }
358 /**
359 *
360 * @param datestr 解析字符串 如2014-04-1716:38:57
361 * @param sourceDateformat 源日期格式 如yyyy-MM-ddHH:mm:ss
362 * @param formatStr 要转换的日期格式 如(yyyy-MM-dd HH:mm:ss)
363 * @return
364 */
365 public static String strTOdateTOStr(String datestr,String sourceDateformat,String targetDateformat){
366 // String str="2014-04-1716:38:57";
367 try {
368 SimpleDateFormat sourceFormat = new SimpleDateFormat(sourceDateformat);
369 SimpleDateFormat targetFormat = new SimpleDateFormat(targetDateformat);
370 return targetFormat.format(sourceFormat.parse(datestr));
371 } catch (Exception e) {
372 log.info("strTOdateTOStr:"+e);
373 }
374 return null;
375
376 }
377 /////////////////////////////////////////////////////////////////////////////////////////////////////////
378
379 public static void main(String[] args) throws Exception{
380 //getDatesByMonth(2013,2);
381 getDateListBydates("20130517","20130519","yyyyMMdd");
382
383 }
384
385 }
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