Java如何用空格做分割符但不分割[]中的空格

Question

比如：aa bb [cc dd ee] ff
分割成
aa
bb
[cc dd ee]
ff

Answer 1

不存在嵌套[]，例如：aa [bb [cc dd]] ee
不存在类似左右不匹配，例如：aa bb [cc dd ee和aa bb cc] dd ee

就这样。。。

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;


public class Test {
    public static void main(String[] args) throws Exception {
        String[] split = split("aa bb [cc dd ee] [ff gg] ee", " ");
        for(String s : split)
            System.out.println(s);
    }

    private static String[] split(String str, String regex) throws Exception {
        List<String> resultList = new ArrayList<>();
        if(str == null || str.isEmpty()) return resultList.toArray(new String[0]);
        String[] split = str.split(regex);
        Queue<String> queue = new LinkedList<>();
        for(String s: split){
            if(s.charAt(0) == '[' && s.charAt(s.length() - 1) == ']'){
                resultList.add(s);
                continue;
            }
            if(s.charAt(0) == '['){
                queue.offer(s);
                continue;
            }
            if(s.charAt(s.length() - 1) == ']'){
                if(queue.isEmpty())
                    throw new Exception("格式不对");
                StringBuilder sb = new StringBuilder();
                while(!queue.isEmpty()){
                    sb.append(queue.poll());
                    sb.append(" ");
                }
                sb.append(s);
                resultList.add(sb.toString());
                continue;
            }
            if(!queue.isEmpty()) queue.offer(s);
            else resultList.add(s);
        }
        return resultList.toArray(new String[0]);
    }
}