拆分引用了一个字符串java

Question

I would like some help with the following question.

I have the following string

1,1,0,3, '2014-12-02 12:15:13', '2015-05-20', 'string', 'other string', 1,2,1, NULL, '', '', NULL, NULL, NULL

and would make the split and put in an array only those quoted ignoring others. You could even separate by commas, but the sequences vary.

I am using the following regex:

 String splitStr[] = str.split("\'([^\\']*)\'");

but the output is as follows:

1,1,0,3,, ,,,, ,,, 1,2,1, NULL,, ,,, NULL, NULL, NULL

What I need is exactly the opposite, something like this:

'2014-12-02 12:15:13', '2015-05-20', 'string', 'other string','', ''

Answer 1

You can do this in Java:

String str = str = "1,1,0,3, '2014-12-02 12:15:13', '2015-05-\\'20', 'string', 'other string', 1,2,1, NULL, '', '', NULL, NULL, NULL";
Pattern p = Pattern.compile("'([^'\\\\]*(?:\\\\.[^'\\\\]*)*)'");
Matcher m = p.matcher(str);

while (m.find()) {
    System.out.println("val: [" + m.group(1) + ']');
}

RegEx Demo

Output:

val: [2014-12-02 12:15:13]
val: [2015-05-\'20]
val: [string]
val: [other string]
val: []
val: []

Answer 2

Regex doesn't support state, so it's basically impossible to do this as a general case. You can't "count" how many quote marks you've seen in regex.

You can find libraries to do things like this or loop through the String and split it either matching it yourself or using a pattern matcher.