1 package com.cy; 59 import java.security.InvalidParameterException; 60 import java.text.ParseException; 61 import java.text.SimpleDateFormat; 62 import java.util.ArrayList; 63 import java.util.Calendar; 64 import java.util.Date; 65 import java.util.HashMap; 66 import java.util.Map; 67 68 public class DateUtils { 69 private static final long MILLIS_IN_A_SECOND = 1000; 70 71 private static final long SECONDS_IN_A_MINUTE = 60; 72 73 private static final int MONTHS_IN_A_YEAR = 12; 74 75 /** 76 * 获得指定日期之后一段时期的日期。例如某日期之后3天的日期等 时间为23:59:59。 77 * 78 * @param origDate 79 * 基准日期 80 * @param amount 81 * 时间数量 82 * @param timeUnit 83 * 时间单位，如年、月、日等。用Calendar中的常量代表 84 * @return {@link Date} 85 */ 86 public static final Date dateAfter(Date origDate, int amount, int timeUnit) { 87 Calendar calendar = Calendar.getInstance(); 88 calendar.setTime(origDate); 89 // 将小时至0 90 // calendar.set(Calendar.HOUR_OF_DAY, 23); 91 // 将分钟至0 92 // calendar.set(Calendar.MINUTE, 59); 93 // 将秒至0 94 // calendar.set(Calendar.SECOND, 59); 95 // 将毫秒至0 96 // calendar.set(Calendar.MILLISECOND, 0); 97 calendar.add(timeUnit, amount); 98 return calendar.getTime(); 99 } 100 101 /** 102 * 获得指定日期之后一段时期的日期。例如某日期之后3天的日期等。 103 * 104 * @param origDate 105 * 基准日期 106 * @param amount 107 * 时间数量 108 * @param timeUnit 109 * 时间单位，如年、月、日等。用Calendar中的常量代表 110 * @return {@link Date} 111 */ 112 public static final Date timeAfter(Date origDate, int amount, int timeUnit) { 113 Calendar calendar = Calendar.getInstance(); 114 calendar.setTime(origDate); 115 calendar.add(timeUnit, amount); 116 return calendar.getTime(); 117 } 118 119 /** 120 * 获得指定日期之前一段时期的日期。例如某日期之前3天的日期等。 121 * 122 * @param origDate 123 * 基准日期 124 * @param amount 125 * 时间数量 126 * @param timeUnit 127 * 时间单位，如年、月、日等。用Calendar中的常量代表 128 * @return {@link Date} 129 */ 130 public static final Date dateBefore(Date origDate, int amount, int timeUnit) { 131 Calendar calendar = Calendar.getInstance(); 132 calendar.add(timeUnit, -amount); 133 return calendar.getTime(); 134 } 135 136 /** 137 * 根据年月日构建日期对象。注意月份是从1开始计数的，即month为1代表1月份。 138 * 139 * @param year 140 * 年 141 * @param month 142 * 月。注意1代表1月份，依此类推。 143 * @param day 144 * 日 145 * @return {@link Date} 146 */ 147 public static Date date(int year, int month, int date) { 148 Calendar calendar = Calendar.getInstance(); 149 calendar.set(year, month - 1, date, 0, 0, 0); 150 calendar.set(Calendar.MILLISECOND, 0); 151 return calendar.getTime(); 152 } 153 154 /** 155 * 计算两个日期（不包括时间）之间相差的周年数 156 * 157 * @param date1 158 * 开始时间 159 * @param date2 160 * 结束时间 161 * @return {@link Integer} 162 */ 163 public static int getYearDiff(Date date1, Date date2) { 164 if (date1 == null || date2 == null) { 165 throw new InvalidParameterException("date1 and date2 cannot be null!"); 166 } 167 if (date1.after(date2)) { 168 throw new InvalidParameterException("date1 cannot be after date2!"); 169 } 170 171 Calendar calendar = Calendar.getInstance(); 172 calendar.setTime(date1); 173 int year1 = calendar.get(Calendar.YEAR); 174 int month1 = calendar.get(Calendar.MONTH); 175 int day1 = calendar.get(Calendar.DATE); 176 177 calendar.setTime(date2); 178 int year2 = calendar.get(Calendar.YEAR); 179 int month2 = calendar.get(Calendar.MONTH); 180 int day2 = calendar.get(Calendar.DATE); 181 182 int result = year2 - year1; 183 if (month2 < month1) { 184 result--; 185 } else if (month2 == month1 && day2 < day1) { 186 result--; 187 } 188 return result; 189 } 190 191 /** 192 * 计算两个日期（不包括时间）之间相差的整月数 193 * 194 * @param date1 195 * 开始时间 196 * @param date2 197 * 结束时间 198 * @return {@link Integer} 199 */ 200 public static int getMonthDiff(Date date1, Date date2) { 201 if (date1 == null || date2 == null) { 202 throw new InvalidParameterException("date1 and date2 cannot be null!"); 203 } 204 if (date1.after(date2)) { 205 throw new InvalidParameterException("date1 cannot be after date2!"); 206 } 207 208 Calendar calendar = Calendar.getInstance(); 209 calendar.setTime(date1); 210 int year1 = calendar.get(Calendar.YEAR); 211 int month1 = calendar.get(Calendar.MONTH); 212 int day1 = calendar.get(Calendar.DATE); 213 214 calendar.setTime(date2); 215 int year2 = calendar.get(Calendar.YEAR); 216 int month2 = calendar.get(Calendar.MONTH); 217 int day2 = calendar.get(Calendar.DATE); 218 219 int months = 0; 220 if (day2 >= day1) { 221 months = month2 - month1; 222 } else { 223 months = month2 - month1 - 1; 224 } 225 return (year2 - year1) * MONTHS_IN_A_YEAR + months; 226 } 227 228 /** 229 * 统计两个日期之间包含的天数。包含date1，但不包含date2 230 * 231 * @param date1 232 * 开始时间 233 * @param date2 234 * 结束时间 235 * @return {@link Integer} 236 * @throws ParseException 237 */ 238 public static int getDayDiff(Date date1, Date date2) { 239 if (date1 == null || date2 == null) { 240 throw new InvalidParameterException("date1 and date2 cannot be null!"); 241 } 242 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 243 Date smdate; 244 try { 245 smdate = sdf.parse(sdf.format(date1)); 246 Date bdate = sdf.parse(sdf.format(date2)); 247 Calendar cal = Calendar.getInstance(); 248 cal.setTime(smdate); 249 long time1 = cal.getTimeInMillis(); 250 cal.setTime(bdate); 251 long time2 = cal.getTimeInMillis(); 252 long between_days = (time2 - time1) / (1000 * 3600 * 24); 253 return Integer.parseInt(String.valueOf(between_days)); 254 } catch (ParseException e) { 255 e.printStackTrace(); 256 } 257 return 0; 258 } 259 260 /** 261 * 计算time2比time1晚多少分钟，忽略日期部分 262 * 263 * @param time1 264 * @param time2 265 * @return 266 */ 267 public static int getMinuteDiffByTime(Date time1, Date time2) { 268 long startMil = 0; 269 long endMil = 0; 270 Calendar calendar = Calendar.getInstance(); 271 calendar.setTime(time1); 272 calendar.set(1900, 1, 1); 273 startMil = calendar.getTimeInMillis(); 274 calendar.setTime(time2); 275 calendar.set(1900, 1, 1); 276 endMil = calendar.getTimeInMillis(); 277 return (int) ((endMil - startMil) / MILLIS_IN_A_SECOND / SECONDS_IN_A_MINUTE); 278 } 279 280 /** 281 * 计算时间是否是同一天 282 * 283 * @param dateA 284 * @param dateB 285 * @return 286 */ 287 public static boolean areSameDay(Date dateA, Date dateB) { 288 Calendar calDateA = Calendar.getInstance(); 289 calDateA.setTime(dateA); 290 291 Calendar calDateB = Calendar.getInstance(); 292 calDateB.setTime(dateB); 293 294 return calDateA.get(Calendar.YEAR) == calDateB.get(Calendar.YEAR) 295 && calDateA.get(Calendar.MONTH) == calDateB.get(Calendar.MONTH) 296 && calDateA.get(Calendar.DAY_OF_MONTH) == calDateB.get(Calendar.DAY_OF_MONTH); 297 } 298 299 /** 300 * @Title: getCurrYearLast 301 * @Description: 获取某年最后一天 302 * @param date 303 * @return Date 304 */ 305 public static Date getCurrYearLast(Date date) { 306 Calendar currCal = Calendar.getInstance(); 307 currCal.setTime(date); 308 int currentYear = currCal.get(Calendar.YEAR); 309 return getYearLast(currentYear); 310 } 311 312 private static Date getYearLast(int year) { 313 Calendar calendar = Calendar.getInstance(); 314 calendar.clear(); 315 calendar.set(Calendar.YEAR, year); 316 317 calendar.roll(Calendar.DAY_OF_YEAR, -1); 318 // 将小时至0 319 calendar.set(Calendar.HOUR_OF_DAY, 23); 320 // 将分钟至0 321 calendar.set(Calendar.MINUTE, 59); 322 // 将秒至0 323 calendar.set(Calendar.SECOND, 59); 324 // 将毫秒至0 325 calendar.set(Calendar.MILLISECOND, 0); 326 327 Date currYearLast = calendar.getTime(); 328 return currYearLast; 329 } 330 /* 331 * private static Date getYearLast(int year) { Calendar calendar = 332 * Calendar.getInstance(); calendar.clear(); calendar.set(Calendar.YEAR, 333 * year); calendar.roll(Calendar.DAY_OF_YEAR, -1); Date currYearLast = 334 * calendar.getTime(); return currYearLast; } 335 */ 336 /** 337 * 338 * @param args 339 * @throws ParseException 340 * 341 * 根据结算周期数 对开始时间与结束时间进行分段 342 */ 343 public static void main(String[] args) throws ParseException { 344 /*开始时间*/ 345 Date startDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2017-1-20 10:31:36"); 346 /*结束时间*/ 347 Date endDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2017-5-12 10:31:36"); 348 /*周期数*/ 349 int solt = 2; 350 ArrayList<Map<String, Object>> list = new ArrayList<>(); 351 352 while (startDate.getTime()<endDate.getTime()) { 353 Map<String, Object> map = new HashMap<>(); 354 map.put("开始时间",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(startDate)); 355 startDate=dateAfter(startDate, solt, Calendar.MONTH); 356 if (startDate.getTime()>endDate.getTime()) { 357 map.put("结束时间",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(endDate)); 358 359 } else { 360 map.put("结束时间",new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(startDate)); 361 } 362 list.add(map); 363 } 364 System.out.println(list); 365 } 366 }