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java日期处理日期工具类DateUtil备忘笔记2 [复制链接]

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发表于 2012-03-11 20:43 |只看该作者 |倒序浏览

java日期处理日期工具类DateUtil备忘笔记2

301. public static String addYear(String date, int i) {
302. try {
303. GregorianCalendar gCal = new GregorianCalendar(
304. Integer.parseInt(date.substring(0, 4)),
305. Integer.parseInt(date.substring(5, 7)) - 1,
306. Integer.parseInt(date.substring(8, 10)));
307. gCal.add(GregorianCalendar.YEAR, i);
308. return sdf_date_format.format(gCal.getTime());
309. } catch (Exception e) {
310. logger.debug("DateUtil.addYear():" + e.toString());
311. return "";
312. }
313. }
314.
315. /**
316. * 返回某年某月中的最大天
317. * @author dylan_xu
318. * @date Mar 11, 2012
319. * @param year
320. * @param month
321. * @return
322. */
323. public static int getMaxDay(int iyear, int imonth) {
324. int day = 0;
325. try {
326. if (imonth == 1 || imonth == 3 || imonth == 5 || imonth == 7
327. || imonth == 8 || imonth == 10 || imonth == 12) {
328. day = 31;
329. } else if (imonth == 4 || imonth == 6 || imonth == 9 || imonth == 11) {
330. day = 30;
331. } else if ((0 == (iyear % 4)) && (0 != (iyear % 100)) || (0 == (iyear % 400))) {
332. day = 29;
333. } else {
334. day = 28;
335. }
336. return day;
337. } catch (Exception e) {
338. logger.debug("DateUtil.getMonthDay():" + e.toString());
339. return 1;
340. }
341. }
342.
343. /**
344. * 格式化日期
345. * @author dylan_xu
346. * @date Mar 11, 2012
347. * @param orgDate
348. * @param Type
349. * @param Span
350. * @return
351. */
352. @SuppressWarnings("static-access")
353. public String rollDate(String orgDate, int Type, int Span) {
354. try {
355. String temp = "";
356. int iyear, imonth, iday;
357. int iPos = 0;
358. char seperater = '-';
359. if (orgDate == null || orgDate.length() < 6) {
360. return "";
361. }
362.
363. iPos = orgDate.indexOf(seperater);
364. if (iPos > 0) {
365. iyear = Integer.parseInt(orgDate.substring(0, iPos));
366. temp = orgDate.substring(iPos + 1);
367. } else {
368. iyear = Integer.parseInt(orgDate.substring(0, 4));
369. temp = orgDate.substring(4);
370. }
371.
372. iPos = temp.indexOf(seperater);
373. if (iPos > 0) {
374. imonth = Integer.parseInt(temp.substring(0, iPos));
375. temp = temp.substring(iPos + 1);
376. } else {
377. imonth = Integer.parseInt(temp.substring(0, 2));
378. temp = temp.substring(2);
379. }
380.
381. imonth--;
382. if (imonth < 0 || imonth > 11) {
383. imonth = 0;
384. }
385.
386. iday = Integer.parseInt(temp);
387. if (iday < 1 || iday > 31)
388. iday = 1;
389.
390. Calendar orgcale = Calendar.getInstance();
391. orgcale.set(iyear, imonth, iday);
392. temp = this.rollDate(orgcale, Type, Span);
393. return temp;
394. } catch (Exception e) {
395. return "";
396. }
397. }
398.
399. public static String rollDate(Calendar cal, int Type, int Span) {
400. try {
401. String temp = "";
402. Calendar rolcale;
403. rolcale = cal;
404. rolcale.add(Type, Span);
405. temp = sdf_date_format.format(rolcale.getTime());
406. return temp;
407. } catch (Exception e) {
408. return "";
409. }
410. }
411.
412. /**
413. * 返回默认的日期格式
414. * @author dylan_xu
415. * @date Mar 11, 2012
416. * @return
417. */
418. public static synchronized String getDatePattern() {
419. defaultDatePattern = "yyyy-MM-dd";
420. return defaultDatePattern;
421. }
422.
423. /**
424. * 将指定日期按默认格式进行格式代化成字符串后输出如：yyyy-MM-dd
425. * @author dylan_xu
426. * @date Mar 11, 2012
427. * @param aDate
428. * @return
429. */
430. public static final String getDate(Date aDate) {
431. SimpleDateFormat df = null;
432. String returnValue = "";
433. if (aDate != null) {
434. df = new SimpleDateFormat(getDatePattern());
435. returnValue = df.format(aDate);
436. }
437. return (returnValue);
438. }
439.
440. /**
441. * 取得给定日期的时间字符串，格式为当前默认时间格式
442. * @author dylan_xu
443. * @date Mar 11, 2012
444. * @param theTime
445. * @return
446. */
447. public static String getTimeNow(Date theTime) {
448. return getDateTime(timePattern, theTime);
449. }
450.
451. /**
452. * 取得当前时间的Calendar日历对象
453. * @author dylan_xu
454. * @date Mar 11, 2012
455. * @return
456. * @throws ParseException
457. */
458. public Calendar getToday() throws ParseException {
459. Date today = new Date();
460. SimpleDateFormat df = new SimpleDateFormat(getDatePattern());
461. String todayAsString = df.format(today);
462. Calendar cal = new GregorianCalendar();
463. cal.setTime(convertStringToDate(todayAsString));
464. return cal;
465. }
466.
467. /**
468. * 将日期类转换成指定格式的字符串形式
469. * @author dylan_xu
470. * @date Mar 11, 2012
471. * @param aMask
472. * @param aDate
473. * @return
474. */
475. public static final String getDateTime(String aMask, Date aDate) {
476. SimpleDateFormat df = null;
477. String returnValue = "";
478.
479. if (aDate == null) {
480. logger.error("aDate is null!");
481. } else {
482. df = new SimpleDateFormat(aMask);
483. returnValue = df.format(aDate);
484. }
485. return (returnValue);
486. }
487.
488. /**
489. * 将指定的日期转换成默认格式的字符串形式
490. * @author dylan_xu
491. * @date Mar 11, 2012
492. * @param aDate
493. * @return
494. */
495. public static final String convertDateToString(Date aDate) {
496. return getDateTime(getDatePattern(), aDate);
497. }
498.
499. /**
500. * 将日期字符串按指定格式转换成日期类型
501. * @author dylan_xu
502. * @date Mar 11, 2012
503. * @param aMask 指定的日期格式，如:yyyy-MM-dd
504. * @param strDate 待转换的日期字符串
505. * @return
506. * @throws ParseException
507. */
508. public static final Date convertStringToDate(String aMask, String strDate)
509. throws ParseException {
510. SimpleDateFormat df = null;
511. Date date = null;
512. df = new SimpleDateFormat(aMask);
513.
514. if (logger.isDebugEnabled()) {
515. logger.debug("converting '" + strDate + "' to date with mask '" + aMask + "'");
516. }
517. try {
518. date = df.parse(strDate);
519. } catch (ParseException pe) {
520. logger.error("ParseException: " + pe);
521. throw pe;
522. }
523. return (date);
524. }
525.
526. /**
527. * 将日期字符串按默认格式转换成日期类型
528. * @author dylan_xu
529. * @date Mar 11, 2012
530. * @param strDate
531. * @return
532. * @throws ParseException
533. */
534. public static Date convertStringToDate(String strDate)
535. throws ParseException {
536. Date aDate = null;
537.
538. try {
539. if (logger.isDebugEnabled()) {
540. logger.debug("converting date with pattern: " + getDatePattern());
541. }
542. aDate = convertStringToDate(getDatePattern(), strDate);
543. } catch (ParseException pe) {
544. logger.error("Could not convert '" + strDate + "' to a date, throwing exception");
545. throw new ParseException(pe.getMessage(), pe.getErrorOffset());
546. }
547. return aDate;
548. }
549.
550. /**
551. * 返回一个JAVA简单类型的日期字符串
552. * @author dylan_xu
553. * @date Mar 11, 2012
554. * @return
555. */
556. public static String getSimpleDateFormat() {
557. SimpleDateFormat formatter = new SimpleDateFormat();
558. String NDateTime = formatter.format(new Date());
559. return NDateTime;
560. }
561.
562. /**
563. * 将指定字符串格式的日期与当前时间比较
564. * @author DYLAN
565. * @date Feb 17, 2012
566. * @param strDate 需要比较时间
567. * @return
568. * <p>
569. * int code
570. * <ul>
571. * <li>-1 当前时间 < 比较时间 </li>
572. * <li> 0 当前时间 = 比较时间 </li>
573. * <li>>=1当前时间 > 比较时间 </li>
574. * </ul>
575. * </p>
576. */
577. public static int compareToCurTime (String strDate) {
578. if (StringUtils.isBlank(strDate)) {
579. return -1;
580. }
581. Date curTime = cale.getTime();
582. String strCurTime = null;
583. try {
584. strCurTime = sdf_datetime_format.format(curTime);
585. } catch (Exception e) {
586. if (logger.isDebugEnabled()) {
587. logger.debug("[Could not format '" + strDate + "' to a date, throwing exception:" + e.getLocalizedMessage() + "]");
588. }
589. }
590. if (StringUtils.isNotBlank(strCurTime)) {
591. return strCurTime.compareTo(strDate);
592. }
593. return -1;
594. }
595.
596. /**
597. * 为查询日期添加最小时间
598. *
599. * @param 目标类型Date
600. * @param 转换参数Date
601. * @return
602. */
603. @SuppressWarnings("deprecation")
604. public static Date addStartTime(Date param) {
605. Date date = param;
606. try {
607. date.setHours(0);
608. date.setMinutes(0);
609. date.setSeconds(0);
610. return date;
611. } catch (Exception ex) {
612. return date;
613. }
614. }
615.
616. /**
617. * 为查询日期添加最大时间
618. *
619. * @param 目标类型Date
620. * @param 转换参数Date
621. * @return
622. */
623. @SuppressWarnings("deprecation")
624. public static Date addEndTime(Date param) {
625. Date date = param;
626. try {
627. date.setHours(23);
628. date.setMinutes(59);
629. date.setSeconds(0);
630. return date;
631. } catch (Exception ex) {
632. return date;
633. }
634. }
635.
636. /**
637. * 返回系统现在年份中指定月份的天数
638. *
639. * @param 月份month
640. * @return 指定月的总天数
641. */
642. @SuppressWarnings("deprecation")
643. public static String getMonthLastDay(int month) {
644. Date date = new Date();
645. int[][] day = { { 0, 30, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
646. { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } };
647. int year = date.getYear() + 1900;
648. if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
649. return day[1][month] + "";
650. } else {
651. return day[0][month] + "";
652. }
653. }
654.
655. /**
656. * 返回指定年份中指定月份的天数
657. *
658. * @param 年份year
659. * @param 月份month
660. * @return 指定月的总天数
661. */
662. public static String getMonthLastDay(int year, int month) {
663. int[][] day = { { 0, 30, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
664. { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } };
665. if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
666. return day[1][month] + "";
667. } else {
668. return day[0][month] + "";
669. }
670. }
671.
672. /**
673. * 判断是平年还是闰年
674. * @author dylan_xu
675. * @date Mar 11, 2012
676. * @param year
677. * @return
678. */
679. public static boolean isLeapyear(int year) {
680. if ((year % 4 == 0 && year % 100 != 0) || (year % 400) == 0) {
681. return true;
682. } else {
683. return false;
684. }
685. }
686.
687. /**
688. * 取得当前时间的日戳
689. * @author dylan_xu
690. * @date Mar 11, 2012
691. * @return
692. */
693. @SuppressWarnings("deprecation")
694. public static String getTimestamp() {
695. Date date = cale.getTime();
696. String timestamp = "" + (date.getYear() + 1900) + date.getMonth()
697. + date.getDate() + date.getMinutes() + date.getSeconds()
698. + date.getTime();
699. return timestamp;
700. }
701.
702. /**
703. * 取得指定时间的日戳
704. *
705. * @return
706. */
707. @SuppressWarnings("deprecation")
708. public static String getTimestamp(Date date) {
709. String timestamp = "" + (date.getYear() + 1900) + date.getMonth()
710. + date.getDate() + date.getMinutes() + date.getSeconds()
711. + date.getTime();
712. return timestamp;
713. }
714.
715. public static void main(String[] args) {
716. System.out.println(getYear() + "|" + getMonth() + "|" + getDate());
717. }
718.}

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