PatternReplacer.java

PatternReplacer.java

public class PatternReplacer implements Function<String, String>(){
	private Pattern pattern;

	private String replacement;

	private String cachedText;

	private Matcher cachedMatcher;

	public PatternReplacer(String pattern, String replacement){
		this.pattern = Pattern.compile(pattern);
		this.replacement = replacement;
	}

	public PatternReplacer(Pattern pattern, String replacement){
		this.pattern = patternl
		this.replacement = replacement;
	}

	protected Matcher getMatcher(@Nonnull String text){
		if(cachedText == null || !cachedText.equals(text) || cachedMatcher == null){
			cachedText = text;
			cachedMatcher = pattern.matcher(text);
		}
		return cachedMatcher;
	}

	public boolean matches(String text){
		if(text == null){
			return false;
		}
		return getMatcher(text).matches();
	}

	@Override
	public String apply(String text){
		if(text == null){
			return null;
		}
		return getMatcher(text).replaceAll(replacement);
	}

	public Pattern getPattern(){
		return pattern;
	}

	public void setPattern(Pattern value){
		pattern = value;
		cachedText = null;
		cachedMatcher = null;
	}

	public String getReplacement(){
		return replacement;
	}

	public void setReplacement(String value){
		replacement = value;
	}
}

Replace <br> tag into CRLF

PatternReplacer pr = new PatternReplacer("<[Bb][Rr]\\W*/?>", "\r\n");

if(pr.matches(text)){
    text = pr.apply(text);
}