java regex,仅当不在引号或括号中时才用逗号分隔

Question

我想通过正则表达式进行java拆分.当我的字符串不在单引号或括号中时,我想在每个逗号上拆分我的字符串.例:

Hello, 'my,',friend,(how ,are, you),(,)


 should give:
    hello
    my,
    friend
    how, are, you
    ,

我试过这个:

(?i),(?=([^\'|\(]*\'|\([^\'|\(]*\'|\()*[^\'|\)]*$)

但我不能让它工作(我通过http://java-regex-tester.appspot.com/测试)

有任何想法吗？

Answer 1

嵌套的paranthesises不能被正则表达式分割.它更容易手动拆分.

public static List<String> split(String orig) {
    List<String> splitted = new ArrayList<String>();
    int nextingLevel = 0;
    StringBuilder result = new StringBuilder();
    for (char c : orig.toCharArray()) {
        if (c == ',' && nextingLevel == 0) {
            splitted.add(result.toString());
            result.setLength(0);// clean buffer
        } else {
            if (c == '(')
                nextingLevel++;
            if (c == ')')
                nextingLevel--;
            result.append(c);
        }
    }
    // Thanks PoeHah for pointing it out. This adds the last element to it.
    splitted.add(result.toString());
    return splitted;
}

希望这可以帮助.