VerbalExpressions is a Java library that helps to construct difficult regular expressions.
Maven Dependency:
<dependency>
<groupId>ru.lanwen.verbalregex</groupId>
<artifactId>java-verbal-expressions</artifactId>
<version>1.4</version>
</dependency>You can use SNAPSHOT dependency with adding to pom.xml:
<repositories>
<repository>
<id>ossrh</id>
<url>https://oss.sonatype.org/content/repositories/snapshots</url>
</repository>
</repositories>VerbalExpression testRegex = VerbalExpression.regex()
.startOfLine().then("http").maybe("s")
.then("://")
.maybe("www.").anythingBut(" ")
.endOfLine()
.build();
// Create an example URL
String url = "https://www.google.com";
// Use VerbalExpression's testExact() method to test if the entire string matches the regex
testRegex.testExact(url); //True
testRegex.toString(); // Outputs the regex used:
// ^(?:http)(?:s)?(?:\:\/\/)(?:www\.)?(?:[^\ ]*)$VerbalExpression testRegex = VerbalExpression.regex()
.startOfLine().then("abc").or("def")
.build();
String testString = "defzzz";
//Use VerbalExpression's test() method to test if parts if the string match the regex
testRegex.test(testString); // true
testRegex.testExact(testString); // false
testRegex.getText(testString); // returns: defBuilder can be cloned:
VerbalExpression regex = regex(regex().anything().addModifier('i')).endOfLine().build();Or can be used in another regex:
VerbalExpression.Builder digits = regex().capt().digit().oneOrMore().endCapt().tab();
VerbalExpression regex2 = regex().add(digits).add(digits).build();Feel free to use any predefined char groups:
regex().wordChar().nonWordChar()
.space().nonSpace()
.digit().nonDigit()Define captures:
String text = "aaabcd";
VerbalExpression regex = regex()
.find("a")
.capture().find("b").anything().endCapture().then("cd").build();
regex.getText(text) // returns "abcd"
regex.getText(text, 1) // returns "b"You can view all implementations on VerbalExpressions.github.io
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