正则表达式匹配由逗号分隔的字符串中的元素，忽略双引号、花括号和方括号中的逗号

Question

我有一个字符串值，如下所示

String str = {"A":"do not seperate,value","B":"OPM","C":[1,2,"AB",{"1":{"1":2,"2":[1,2]},"2":2}],"D":{"1":1,"2":[{"1":1,"2":2,"3":3},9,10]}};

如何编写一个正则表达式来捕获由逗号分隔的元素，而逗号不在双引号、方括号或花括号内？我想通过做下面的事情来匹配和获取元素；使用模式匹配。

List<String> list = new ArrayList<>();
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(str);
while (matcher.find()) {
    list.add(matcher.group());
}

元素应该是，

"A":"do not seperate,value"
"B":"OPM"
"C":[1,2,"AB",{"1":{"1":2,"2":[1,2]},"2":2}]
"D":{"1":1,"2":[{"1":1,"2":2,"3":3},9,10]}

如果字符串如下所示

String str = [1,2,{"A":1,"B":2},[19,10,11,{"A":1,"B":2}],100]

那么元素应该是

1
2
{"A":1,"B":2}
[19,10,11,{"A":1,"B":2}]
100

Answer 1

因为它是一个json字符串，所以可以使用对象映射器对其进行解析，并将其作为hashmap中的键值对获取。

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.*;
import org.json.JSONObject;

public class Test {
    public static void main(String args[]) throws IOException {
        String str = "{\"A\":\"do not seperate,value\",\"B\":\"OPM\",\"C\":[1,2,\"AB\",{\"1\":{\"1\":2,\"2\":[1,2]},\"2\":2}],\"D\":{\"1\":1,\"2\":[{\"1\":1,\"2\":2,\"3\":3},9,10]}}";
        JSONObject obj = new JSONObject(str);
        HashMap<String, Object> result = new ObjectMapper().readValue(str, new TypeReference<Map<String, Object>>() {
        });
        result.entrySet().stream().forEach(System.out::println);
    }
}

输出

A=do not seperate,value
B=OPM
C=[1, 2, AB, {1={1=2, 2=[1, 2]}, 2=2}]
D={1=1, 2=[{1=1, 2=2, 3=3}, 9, 10]}