Java String to Map. Best way to do that

Question 1

//split at , only if it's not within ""
String[] packages=input.split(",(?=([^\"]*\"[^\"]*\")+[^\"]*$)");
for(String pack:packages)
{
    String[] output=pack.split("(?=uses:=)");
    output[0];//key
    if(output.length==2)//incase if there's no value
    output[1];//value
}

Edit

(?=uses:=) is a lookahead which would match at the position which is followed by uses:=..Now we could have used uses:= as regex but that would eat uses:=...To avoid it we use zero width lookahead

Question 2

Sometimes the long way is the easiest way:

public static Map<String, String> parse(String s) {
    Map<String, String> allPackageInfo = new HashMap<>();

    CharacterIterator i = new StringCharacterIterator(s);
    char c = i.first();
    while (c != CharacterIterator.DONE) {
        StringBuilder packageName = new StringBuilder();
        while (c != ';' && c != CharacterIterator.DONE) {
            packageName.append(c);
            c = i.next();
        }

        if (c == ';') {
            c = i.next();
        }

        StringBuilder packageInfo = new StringBuilder();
        while (c != ',' && c != CharacterIterator.DONE) {
            if (c == '"') {
                do {
                    packageInfo.append(c);
                    c = i.next();
                } while (c != '"');
            }
            packageInfo.append(c);
            c = i.next();
        }

        if (c == ',') {
            c = i.next();
        }

        allPackageInfo.put(packageName.toString(), packageInfo.toString());
    }

    return allPackageInfo;
}