这个 RowMapper 的错误在哪里

Question

我有这个请求 SQL :

private List<IWsResponse> getBPartnerDetails(String valueNetwork, String reportLevel2) {

            JdbcTemplate tm = new JdbcTemplate(ds.getDataSource());
            StringBuffer sql =  new StringBuffer("SELECT * FROM XRV_BPARTNERDETAILS order by BPartner_ID");

            ArrayList<Object> params = new ArrayList<Object>();

            response = tm.query(sql.toString(), new BPartnerMapper());

            return response;

        }

我像这样创建一个新的 RowMapper (BPartnerMapper)

public class BPartnerMapper implements RowMapper<IWsResponse> {

        @Override
public List<IWsResponse> mapRow(ResultSet rs, int rowNum) throws SQLException {

            List<IWsResponse> bps    = new ArrayList<IWsResponse>();

            while (rs.next()) {

                    bp = new BPartner();
                                      bp.setBPartnerValue(rs.getString("BPartnerValue"));

                //adress
                    adr = new Adress();
                    adr.setBPartnerLocation_ID(BPartner_Location_ID);
                    bp.getAdress().add(adr);

                //user
                    usr = new User();
                    usr.setUser_ID(User_ID);
                    bp.getUsers().add(usr);

                    bps.add(bp)
            }

            return bps;
    }

Class BPartner 是

public class BPartner implements IWsResponse {

    private String BPartnerValue;

    private ArrayList<Adress> adress = new ArrayList<Adress>();

    private ArrayList<User> users = new ArrayList<User>();

}

所以我得到这个错误

The return type is incompatible with RowMapper<IWsResponse>.mapRow(ResultSet, int)

Answer 1

看看documentation。行映射器为单行映射对象。

This method should not call next() on the ResultSet; it is only supposed to map values of the current row.

所以您的 return 类型应该是 IWsResponse 而不是 List。此外，您必须只映射当前行。不是全部。

这个 RowMapper 的错误在哪里

where is the error in this RowMapper

java

spring

spring-jdbc

jdbctemplate