正規表現で日付を検証する方法
日付形式(dd/mm/yyyy)正規表現パターン
(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/((19|20)\\d\\d)
説明
( #start of group #1 0?[1-9] # 01-09 or 1-9 | # ..or [12][0-9] # 10-19 or 20-29 | # ..or 3[01] # 30, 31 ) #end of group #1 / # follow by a "/" ( # start of group #2 0?[1-9] # 01-09 or 1-9 | # ..or 1[012] # 10,11,12 ) # end of group #2 / # follow by a "/" ( # start of group #3 (19|20)\\d\\d # 19[0-9][0-9]or 20[0-9][0-9] ) # end of group #3
上記の正規表現は、 “dd/mm/yyyy”で日付形式を検証するために使用されます。必要に応じて簡単にカスタマイズできます。しかし、うるう年、30日または31日を検証するのは少し難しいので、以下のような基本ロジックが必要な場合があります。
P.S月の閏と日を確認できる正規表現が分かっていれば教えてください.
Javaの正規表現の例
package com.mkyong.regex; import java.util.regex.Matcher; import java.util.regex.Pattern; public class DateValidator{ private Pattern pattern; private Matcher matcher; private static final String DATE__PATTERN = "(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/((19|20)\\d\\d)"; public DateValidator(){ pattern = Pattern.compile(DATE__PATTERN); } /** ** ** Validate date format with regular expression ** @param date date address for validation ** @return true valid date fromat, false invalid date format ** / public boolean validate(final String date){ matcher = pattern.matcher(date); if(matcher.matches()){ matcher.reset(); if(matcher.find()){ String day = matcher.group(1); String month = matcher.group(2); int year = Integer.parseInt(matcher.group(3)); if (day.equals("31") && (month.equals("4") || month .equals("6") || month.equals("9") || month.equals("11") || month.equals("04") || month .equals("06") || month.equals("09"))) { return false;//only 1,3,5,7,8,10,12 has 31 days } else if (month.equals("2") || month.equals("02")) { //leap year if(year % 4==0){ if(day.equals("30") || day.equals("31")){ return false; }else{ return true; } }else{ if(day.equals("29")||day.equals("30")||day.equals("31")){ return false; }else{ return true; } } }else{ return true; } }else{ return false; } }else{ return false; } } }
一致する日付形式:
{空} 1。 「1/1/2010」、「01/01/2020」+ 2.「31/1/2010」、「31/01/2020」+ 3.「29/2/2008」、「29/02/2008 “+ 4” 28/2/2009 “、” 28/02/2009 “+ 5.” 31/3/2010 “、” 31/03/2010 “+ 6.” 30/4/2010 “、” 30 “2010年6月30日” + “2010年6月30日” + “2010年6月31日” “、” 31/07/2010 “+ 10.” 31/8/2010 “、” 31/08/2010 “+ 11.” 30/9/2010 “、” 30/09/2010 “+ 12.” 31/10/2010 “、” 31/10/2010 “+ 13.” 30/11/2010 “、” 30/11/2010 “+ 14.” 31/12/2010 “、” 31/12/2010 ”
日付の形式が一致しません:
{空} 1。日が範囲外です。[1-31]2. “1/13/2010″、 “01/01/1820” – 月が範囲外です。 “32/1/2010″、 “32/01/2020” 2007年はうるう年ではなく、28日しかありません4.「30/2/1/12」は範囲外です。[1900-2999]3. “29/2/2007″、 “29/02/2007” 2008年 “、” 31/02/2008 ” – 2月のうるう年は29日のみ5.” 29/a/2008 “、” a/02/2008 ” – 月が無効、日が無効6.” 333/2/2008 “、” 29/02/200a ” – 日が無効、年が無効7.” 31/4/20100 “、” 31/04/2010 ” – 4月は30日のみ8. 2010/3/31 “、” 31/06/2010 ” – ジュンは30日のみ9. 2010年10月9日、” 31/09/2010 ” – 9月は30日のみ10. 2010年3月31日 – 11月は30日間のみ
ユニットテスト – DateValidatorTest
package com.mkyong.regex; import org.testng.Assert; import org.testng.annotations.** ; /** ** ** Date format dd/mm/yyyy validator Testing ** @author mkyong ** ** /public class DateValidatorTest { private DateValidator dateValidator; @BeforeClass public void initData(){ dateValidator = new DateValidator(); } @DataProvider public Object[][]ValidDateProvider() { return new Object[][]{ new Object[]{"1/1/2010"}, new Object[]{"01/01/2020"}, new Object[]{"31/1/2010"}, new Object[]{"31/01/2020"}, new Object[]{"29/2/2008"}, new Object[]{"29/02/2008"}, new Object[]{"28/2/2009"}, new Object[]{"28/02/2009"}, new Object[]{"31/3/2010"}, new Object[]{"31/03/2010"}, new Object[]{"30/4/2010"}, new Object[]{"30/04/2010"}, new Object[]{"31/5/2010"}, new Object[]{"31/05/2010"}, new Object[]{"30/6/2010"}, new Object[]{"30/06/2010"}, new Object[]{"31/7/2010"}, new Object[]{"31/07/2010"}, new Object[]{"31/8/2010"}, new Object[]{"31/08/2010"}, new Object[]{"30/9/2010"}, new Object[]{"30/09/2010"}, new Object[]{"31/10/2010"}, new Object[]{"31/10/2010"}, new Object[]{"30/11/2010"}, new Object[]{"30/11/2010"}, new Object[]{"31/12/2010"}, new Object[]{"31/12/2010"} }; } @DataProvider public Object[][]InvalidDateProvider() { return new Object[][]{ new Object[]{"32/1/2010"}, new Object[]{"32/01/2020"}, new Object[]{"1/13/2010"}, new Object[]{"01/01/1820"}, new Object[]{"29/2/2007"}, new Object[]{"29/02/2007"}, new Object[]{"30/2/2008"}, new Object[]{"31/02/2008"}, new Object[]{"29/a/2008"}, new Object[]{"a/02/2008"}, new Object[]{"333/2/2008"}, new Object[]{"29/02/200a"}, new Object[]{"31/4/2010"}, new Object[]{"31/04/2010"}, new Object[]{"31/6/2010"}, new Object[]{"31/06/2010"}, new Object[]{"31/9/2010"}, new Object[]{"31/09/2010"}, new Object[]{"31/11/2010"} }; } @Test(dataProvider = "ValidDateProvider") public void ValidDateTest(String date) { boolean valid = dateValidator.validate(date); System.out.println("Date is valid : " + date + " , " + valid); Assert.assertEquals(true, valid); } @Test(dataProvider = "InvalidDateProvider", dependsOnMethods="ValidDateTest") public void InValidDateTest(String date) { boolean valid = dateValidator.validate(date); System.out.println("Date is valid : " + date + " , " + valid); Assert.assertEquals(false, valid); } }
ユニットテスト – 結果
….[Parser]Running:
E:\workspace\mkyong\temp-testng-customsuite.xml
Date is valid : 1/1/2010 , true
Date is valid : 01/01/2020 , true
Date is valid : 31/1/2010 , true
Date is valid : 31/01/2020 , true
Date is valid : 29/2/2008 , true
Date is valid : 29/02/2008 , true
Date is valid : 28/2/2009 , true
Date is valid : 28/02/2009 , true
Date is valid : 31/3/2010 , true
Date is valid : 31/03/2010 , true
Date is valid : 30/4/2010 , true
Date is valid : 30/04/2010 , true
Date is valid : 31/5/2010 , true
Date is valid : 31/05/2010 , true
Date is valid : 30/6/2010 , true
Date is valid : 30/06/2010 , true
Date is valid : 31/7/2010 , true
Date is valid : 31/07/2010 , true
Date is valid : 31/8/2010 , true
Date is valid : 31/08/2010 , true
Date is valid : 30/9/2010 , true
Date is valid : 30/09/2010 , true
Date is valid : 31/10/2010 , true
Date is valid : 31/10/2010 , true
Date is valid : 30/11/2010 , true
Date is valid : 30/11/2010 , true
Date is valid : 31/12/2010 , true
Date is valid : 31/12/2010 , true
Date is valid : 32/1/2010 , false
Date is valid : 32/01/2020 , false
Date is valid : 1/13/2010 , false
Date is valid : 01/01/1820 , false
Date is valid : 29/2/2007 , false
Date is valid : 29/02/2007 , false
Date is valid : 30/2/2008 , false
Date is valid : 31/02/2008 , false
Date is valid : 29/a/2008 , false
Date is valid : a/02/2008 , false
Date is valid : 333/2/2008 , false
Date is valid : 29/02/200a , false
Date is valid : 31/4/2010 , false
Date is valid : 31/04/2010 , false
Date is valid : 31/6/2010 , false
Date is valid : 31/06/2010 , false
Date is valid : 31/9/2010 , false
Date is valid : 31/09/2010 , false
Date is valid : 31/11/2010 , false
PASSED: ValidDateTest(“1/1/2010”)
PASSED: ValidDateTest(“01/01/2020”)
PASSED: ValidDateTest(“31/1/2010”)
PASSED: ValidDateTest(“31/01/2020”)
PASSED: ValidDateTest(“29/2/2008”)
PASSED: ValidDateTest(“29/02/2008”)
PASSED: ValidDateTest(“28/2/2009”)
PASSED: ValidDateTest(“28/02/2009”)
PASSED: ValidDateTest(“31/3/2010”)
PASSED: ValidDateTest(“31/03/2010”)
PASSED: ValidDateTest(“30/4/2010”)
PASSED: ValidDateTest(“30/04/2010”)
PASSED: ValidDateTest(“31/5/2010”)
PASSED: ValidDateTest(“31/05/2010”)
PASSED: ValidDateTest(“30/6/2010”)
PASSED: ValidDateTest(“30/06/2010”)
PASSED: ValidDateTest(“31/7/2010”)
PASSED: ValidDateTest(“31/07/2010”)
PASSED: ValidDateTest(“31/8/2010”)
PASSED: ValidDateTest(“31/08/2010”)
PASSED: ValidDateTest(“30/9/2010”)
PASSED: ValidDateTest(“30/09/2010”)
PASSED: ValidDateTest(“31/10/2010”)
PASSED: ValidDateTest(“31/10/2010”)
PASSED: ValidDateTest(“30/11/2010”)
PASSED: ValidDateTest(“30/11/2010”)
PASSED: ValidDateTest(“31/12/2010”)
PASSED: ValidDateTest(“31/12/2010”)
PASSED: InValidDateTest(“32/1/2010”)
PASSED: InValidDateTest(“32/01/2020”)
PASSED: InValidDateTest(“1/13/2010”)
PASSED: InValidDateTest(“01/01/1820”)
PASSED: InValidDateTest(“29/2/2007”)
PASSED: InValidDateTest(“29/02/2007”)
PASSED: InValidDateTest(“30/2/2008”)
PASSED: InValidDateTest(“31/02/2008”)
PASSED: InValidDateTest(“29/a/2008”)
PASSED: InValidDateTest(“a/02/2008”)
PASSED: InValidDateTest(“333/2/2008”)
PASSED: InValidDateTest(“29/02/200a”)
PASSED: InValidDateTest(“31/4/2010”)
PASSED: InValidDateTest(“31/04/2010”)
PASSED: InValidDateTest(“31/6/2010”)
PASSED: InValidDateTest(“31/06/2010”)
PASSED: InValidDateTest(“31/9/2010”)
PASSED: InValidDateTest(“31/09/2010”)
PASSED: InValidDateTest(“31/11/2010”)
com.mkyong.regex.DateValidatorTest Tests run: 47, Failures: 0, Skips: 0
mkyong
Total tests run: 47, Failures: 0, Skips: 0
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