正则表达式收集

匹配中括号里的内容  []
        String str = "[111]asdq[你好]是我[hello]哈哈[hehe]";
//        String str = "我是[001]真心求救的[002]，你能帮帮我吗";
        Pattern pattern = Pattern.compile("\\[(.*?)\\]");
        Matcher matcher = pattern.matcher(str);
        while(matcher.find()){
            System.out.println(matcher.group(1));
        }