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Ashish Gupta 2021-08-07 12:34:38 +05:30 committed by GitHub
parent dcf8b902dc
commit 6b7dcdf847
1 changed files with 64 additions and 0 deletions
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core-java-modules/core-java-string-algorithms-3/src/main/java/com/baeldung/emailvalidation/EmailValidation.java Normal file
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package com.baeldung.emailvalidation;
import java.util.regex.Pattern;
public class EmailValidation {
private static String regexPattern;
public static boolean usingSimpleRegex(String emailAddress) {
regexPattern = "^(.+)@(\\S+)$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
public static boolean usingStrictRegex(String emailAddress) {
regexPattern = "^(?=.{1,64}@)[A-Za-z0-9_-]+(\\.[A-Za-z0-9_-]+)*@" + "[^-][A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(\\.[A-Za-z]{2,})$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
public static boolean usingUnicodeRegex(String emailAddress) {
regexPattern = "^(?=.{1,64}@)[\\p{L}0-9_-]+(\\.[\\p{L}0-9_-]+)*@" + "[^-][\\p{L}0-9-]+(\\.[\\p{L}0-9-]+)*(\\.[\\p{L}]{2,})$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
public static boolean usingRFC5322Regex(String emailAddress) {
regexPattern = "^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^.-]+@[a-zA-Z0-9.-]+$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
public static boolean restrictDots(String emailAddress) {
regexPattern = "^[a-zA-Z0-9_!#$%&'*+/=?`{|}~^-]+(?:\\.[a-zA-Z0-9_!#$%&'*+/=?`{|}~^-]+)*@" + "[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
public static boolean owaspValidation(String emailAddress) {
regexPattern = "^[a-zA-Z0-9_+&*-]+(?:\\.[a-zA-Z0-9_+&*-]+)*@(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,7}$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
public static boolean topLevelDomain(String emailAddress) {
regexPattern = "^[\\w!#$%&'*+/=?`{|}~^-]+(?:\\.[\\w!#$%&'*+/=?`{|}~^-]+)*" + "@(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,6}$";
return Pattern.compile(regexPattern)
.matcher(emailAddress)
.matches();
}
}