パスワードの正規表現パターン
((?=.** \d)(?=.** [a-z])(?=.** [A-Z])(?=.** [@#$%]).{6,20})
説明
( # Start of group (?=.** \d) # must contains one digit from 0-9 (?=.** [a-z]) # must contains one lowercase characters (?=.** [A-Z]) # must contains one uppercase characters (?=.** [@#$%]) # must contains one special symbols in the list "@#$%" . # match anything with previous condition checking {6,20} # length at least 6 characters and maximum of 20 ) # End of group
?= – アサーション条件を適用することを意味し、それは意味を持ちません。常に他の組み合わせで動作します
全体の組み合わせは、少なくとも1桁、大文字1文字、小文字1文字、特殊記号1文字( “@#$%”)を含む6〜20文字の文字列を意味します。この正規表現パターンは、強力で複雑なパスワードを実装するのに非常に便利です。
__P.Sグループ化の式の順序は関係ありません。
1. Javaの正規表現の例
PasswordValidator.java
package com.mkyong.regex; import java.util.regex.Matcher; import java.util.regex.Pattern; public class PasswordValidator{ private Pattern pattern; private Matcher matcher; private static final String PASSWORD__PATTERN = "((?=.** \\d)(?=.** [a-z])(?=.** [A-Z])(?=.** [@#$%]).{6,20})"; public PasswordValidator(){ pattern = Pattern.compile(PASSWORD__PATTERN); } /** ** ** Validate password with regular expression ** @param password password for validation ** @return true valid password, false invalid password ** / public boolean validate(final String password){ matcher = pattern.matcher(password); return matcher.matches(); } }
2.一致するパスワード:
{空} 1。 mkyong1A @ 2。mkYOn12 $
3.一致しないパスワード:
{空} 1。あまりにも短い、最小6文字2. mkyong12 @、大文字が必要です3. mkyoNg12
、特殊記号 ”
“はここでは使用できません4. mkyonG $$、数字が必要です5. MKYONG12 $、小文字は必須
ユニットテスト – PasswordValidator
ユニットテストはhttp://testng.org/doc/index.html[TestNG]で行います。
PasswordValidatorTest.java
package com.mkyong.regex; import org.testng.Assert; import org.testng.annotations.** ; /** ** ** Password validator Testing ** @author mkyong ** ** /public class PasswordValidatorTest { private PasswordValidator passwordValidator; @BeforeClass public void initData(){ passwordValidator = new PasswordValidator(); } @DataProvider public Object[][]ValidPasswordProvider() { return new Object[][]{ {new String[]{ "mkyong1A@", "mkYOn12$", }} }; } @DataProvider public Object[][]InvalidPasswordProvider() { return new Object[][]{ {new String[]{ "mY1A@","mkyong12@","mkyoNg12** ", "mkyonG$$","MKYONG12$" }} }; } @Test(dataProvider = "ValidPasswordProvider") public void ValidPasswordTest(String[]password) { for(String temp : password){ boolean valid = passwordValidator.validate(temp); System.out.println("Password is valid : " + temp + " , " + valid); Assert.assertEquals(true, valid); } } @Test(dataProvider = "InvalidPasswordProvider", dependsOnMethods="ValidPasswordTest") public void InValidPasswordTest(String[]password) { for(String temp : password){ boolean valid = passwordValidator.validate(temp); System.out.println("Password is valid : " + temp + " , " + valid); Assert.assertEquals(false, valid); } } }
5.ユニットテスト – 結果
Password is valid : mkyong1A@ , true Password is valid : mkYOn12$ , true Password is valid : mY1A@ , false Password is valid : mkyong12@ , false Password is valid : mkyoNg12** , false Password is valid : mkyonG$$ , false Password is valid : MKYONG12$ , false PASSED: ValidPasswordTest([Ljava.lang.String;@1d4c61c) PASSED: InValidPasswordTest([Ljava.lang.String;@116471f) =============================================== com.mkyong.regex.PasswordValidatorTest Tests run: 2, Failures: 0, Skips: 0 =============================================== =============================================== mkyong Total tests run: 2, Failures: 0, Skips: 0 ===============================================