代码：

 public static List<Object> select(String sql, String o)
                throws SQLException, ClassNotFoundException, InstantiationException, IllegalAccessException {
            Class c = Class.forName(o);
            Field[] fls = c.getDeclaredFields();
            List<String> list=  new ArrayList<>();
            for (int i = 0; i < fls.length; i++) {
                System.out.println("公有属性之" + fls[i].getName());
                list.add(fls[i].getName());
            }
            Object object = c.newInstance();
            List<Object> l = new ArrayList<>();
            stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery(sql);
            while (rs.next()) {
                // Retrieve by column name
                String id = rs.getString("href");
               String name = rs.getString("title");      
            // Display values
            System.out.print("ID: " + id);
            System.out.print(", name: " + name);
        }
        rs.close();
        stmt.close();
        conn.close();
        return l;

    }

我想获取传进来的类的所有属性，然后通过re.getString获得值，但是我不知道属性有多少个，在rs.next里for循环遍历的话就会失去rs的作用域。麻烦哪位大神帮我看看怎么写 = =。