How to create regexReplace for a delimiter?

Question

I have the following content:

123|321|1234\|56\|teste\||123

I’d like to make a regex replace to replace all | by line break and ignore the | escaped with \, this way I would like to get the following feedback:

123
321
1234|56teste|
123

---

If anyone has an alternative other than regex also serves.

Answer 1

I found the answer in stack overflow, but I will translate here:

This regex can be used:

(?:\\.|[^\|\\]++)*

To pick up all the content between the Pipes:

List<String> matchList = new ArrayList<String>();
try {
    Pattern regex = Pattern.compile("(?:\\\\.|[^\\|\\\\]++)*");
    Matcher regexMatcher = regex.matcher(subjectString);
    while (regexMatcher.find()) {
        matchList.add(regexMatcher.group());
    } 

Explanation:

(?:        # Combina se...
 \\.       # qualquer caracter escapado
|          # ou...
 [^\|\\]++  # qualquer caracter exceto **|**
)*         # repita inúmeras vezes

Answer 2

I would use a more direct translation than was stated: any | provided that it is not preceded by \. That, in regex, is:

(?<!\\)\|

With this, you can make this substitution in a single line:

"123|321|1234\\|56\\|teste\\||123".replaceAll("(?<!\\\\)\\|", "\n");