java正则表达式解析jdbcUrl

一个练习正则表达式的网站：https://regexr.com/

用java解析jdbcUrl

public static void main(String[] args) throws SQLException {
        String jdbcUrl = "jdbc:mysql://127.0.0.1:3306/database?a=1&b=2";
        String pattern="jdbc:(?<type>[a-z]+)://(?<host>[a-zA-Z0-9-//.]+):(?<port>[0-9]+)/(?<database>[a-zA-Z0-9_]+)?";
        Pattern namePattern = Pattern.compile(pattern);
        Matcher dateMatcher = namePattern.matcher(jdbcUrl);
        while (dateMatcher.find()) {
            String dbType = dateMatcher.group("type");
            String host = dateMatcher.group("host");
            String port = dateMatcher.group("port");
            String database = dateMatcher.group("database");
            System.out.println(dbType);
            System.out.println(host);
            System.out.println(port);
            System.out.println(database);

        }
    }

输出：

mysql
127.0.0.1
3306
database