比如要取小括号里面的日期内容

&[(2023/6/3 18:3:5)

line="&[(2023/6/3 18:3:5)";
String patternString = "\\((.*?)\\)";
Pattern pattern = Pattern.compile(patternString);
          Matcher matcher = pattern.matcher(line);
          if (matcher.find()) {
            String timeStr = matcher.group(1);
            time = DateUtil.parseDateTime(timeStr);
          } else {
            time = new Date();
          }