在实现RowMapper的类中Spring管理bean注入

Question

我有一个BusinessRowMapper类，它实现了RowMapper，将PostGres JSONB对象转换为Java对象。

BusinessRowMapper implements RowMapper<PersonDetails>

它会覆盖mapRow

   public class BusinessRowMapper implements RowMapper<PersonDetails> {

    private PersonUtility utils;

    public BusinessRowMapper(PersonUtility utils) {
        super();
        this.utils = utils;
    }


    public PersonDetails mapRow(final ResultSet rs, final int rowNum) throws SQLException {
        PersonDetails personDetail = utils.unMarshallAndConvertData(rs
                .getString(ConstantsV4.COLUMN_CUST_DTLS_JSON_DOC));
        return personDetail;
    }
}

现在，如何在此BusinessRowMapper bean中执行Spring托管的PersonUtility Bean注入，而不是将实用程序bean作为构造函数参数传递给BusinessRowMapper？

getNamedParameterJdbcTemplate().query(
                        ConstantsV4.RETRIEVE_PERSON_DETAIL_QUERY, params,
                        new BusinessRowMapper(utility));

Answer 1

您可以将@component类定义为在类上添加BusinessRowMapper的spring bean。

然后，您可以在@Component public class BusinessRowMapper implements RowMapper<PersonDetails> { @Autowired private PersonUtility utils; ... }

中自动加载字段

{"date":"2017\/7\/13","student_id":2,"grade":"C"}<br>
{"date":"2017\/7\/1","student_id":3,"grade":"D"}<br>
{"date":"2017\/4\/1","student_id":5,"grade":"E"}