Java的JDBC能否直接返回HashMap？

import java.sql.resultset;
import java.util.hashmap;
import java.util.map;

public class hashmapresultsetproxy implements resultset {
    private resultset rs;

    public hashmapresultsetproxy(resultset rs) {
        this.rs = rs;
    }

    @override
    public map<string, object> gethashmap() throws sqlexception {
        hashmap<string, object> map = new hashmap<>();
        int numcols = rs.getmetadata().getcolumncount();
        for (int i = 0; i < numcols; i++) {
            map.put(rs.getmetadata().getcolumnname(i + 1), rs.getobject(i + 1));
        }
        return map;
    }

    // 其他resultset实现...
}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

public class JdbcHashMapDemo {

    public static void main(String[] args) throws SQLException {
        Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "user", "password");
        ResultSet rs = conn.createStatement().executeQuery("SELECT * FROM users");

        HashMapResultSetProxy hashMapResultSetProxy = new HashMapResultSetProxy(rs);
        Map<String, Object> row = hashMapResultSetProxy.getHashMap();
        System.out.println(row);

        rs.close();
        conn.close();
    }
}