我定义了一个方法，将mysql select查询的结果解析为泛型类。
此方法如下所示：

public <T> List<T> selectFromDb(Class<T> _class, String tableName,
                                     String searchKeyName, String searchKeyValue)
    throws SQLException, IllegalAccessException,
    InstantiationException, NoSuchMethodException, InvocationTargetException, ClassNotFoundException {

    List<T> listDbData = new ArrayList<>();

    final String selectQuery = String.format("select * from %s.%s where %s = ?;",
        schemaName, tableName, searchKeyName);
    PreparedStatement selectStatement = connection.prepareStatement(selectQuery);

    try {
        selectStatement.setString(1, searchKeyValue);
        ResultSet result = selectStatement.executeQuery();
        while (result.next()) {

            T t = _class.getDeclaredConstructor(ResultSet.class).newInstance(result);

            listDbData.add(t);
        }

        selectStatement.close();
    }catch (SQLException e) {
        log.error("Query failed:" + selectQuery);
        throw e;
    } finally {
        selectStatement.close();
    }

    return listDbData;
}

我使用它对两个已定义了模式的数据库表执行select。
之前，我已经定义了一个模式，上面的函数对其起作用。这个班看起来像这样。

@Getter //lombok
   @Setter
    public class C extends A {
        private String varA;
        private String varB;
        private String varC;

       public C(String s1, String s2) {
        ...
        ...
       }

       public C (ResultSet resultSet) {
       ....
       ...
       }

       //Other class methods

    }

现在我定义了一个工厂以使类不可变。我想知道如何修改selectfromdb代码来处理修改后的类。

public class CFactory {

      public static C from(String s1, String s2) {
        C c;
        ...
        ...

        return c;
       }

       public static C from(ResultSet resultSet) throws SQLException {
         C c;
         ....
         ...
         return c; 
         } 
}
@Builder
@Getter //lombok
public class C extends A{

        private final String varA;
        private final String varB;
        private final String varC;

        ....
        ....

}

谢谢。斯瓦加提卡