正则表达式-获取小括号内的内容

需求

在开发过程需要获取字符串中在小括号内的内容，遂记录一下

实现

import cn.hutool.core.util.ReUtil;

public class RegexTest {

    public static void main(String[] args) {
        String str = "username(zhangsan)";
        String regex = "\\((.*?)\\)";
        String group0 = ReUtil.getGroup0(regex, str);
        String group1 = ReUtil.getGroup1(regex, str);
        System.out.println("group0 = " + group0);
        System.out.println("group1 = " + group1);
    }
}

输出结果

group0 = (zhangsan)
group1 = zhangsan