Question

以下查询在sql developoer中执行时返回单个结果，但在调用

时返回空列表

List failedTxnList =  getJdbcTemplate().queryForList(query, params);

并且params的值是[IM1691，VSIB01,1 / 4 / 2017,25 / 4/2017]。请帮我在这里找到问题。

select a.echeque_no,a.oid,a.echeque_date,d.name im_name,c.name vendor_name,a.corp_ref_no,b.hundi_date,a.echeque_amount,b.reversal_date, 
a.status_description 
from sbicorp_echeque_master a, sbi_gvf_vendor_txn_history b,sbi_gvf_vendor_master c, sbi_gvf_im_master d 
where a.debit_status = 'ERR.' 
  and LTRIM(RTRIM(a.corporate_id))= 'IM1691' 
  and LTRIM(RTRIM(a.businessline_id)) = 'VSIB01'  
  and trunc(a.echeque_date) BETWEEN TO_DATE ('1/4/2017', 'dd/mm/yyyy') AND TO_DATE ('25/4/2017', 'dd/mm/yyyy') 
  and a.corporate_id=d.im_code and a.businessline_id = c.vendor_code
  and b.txn_type= 'Original Debit' 
  and a.echeque_no = b.reference_no 
  and substr(a.echeque_no,0,2) in ('CE','CR','CN','CZ') 
order by echeque_date desc -- CE01573281

Answer 1

我唯一能看到的是

trunc(a.echeque_date) BETWEEN TO_DATE ('1/4/2017', 'dd/mm/yyyy') AND TO_DATE ('25/4/2017', 'dd/mm/yyyy')

尝试更改日期字符串以反映所需的格式

TO_DATE ('01/04/2017', 'dd/mm/yyyy') AND TO_DATE ('25/04/2017', 'dd/mm/yyyy')

Answer 2

您要获取的List必须是某种类型，并且必须实现rowMapper。 rowMapper告诉spring哪个列映射到哪个对象。

下面提到一个例子。圆模型类：字段是数据库中的列。

public class Circle {

    private int id;

    private String name;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    public Circle(String name) {
        super();
        this.name = name;
    }
    public Circle(int id, String name) {
        super();
        this.id = id;
        this.name = name;
    }
}

为spring定义一行Mapper，将数据库列映射到Circle对象

public static final class CircleMapper implements RowMapper<Circle> {
        public Circle mapRow(ResultSet resultSet, int arg1) throws SQLException {
            return new Circle(resultSet.getInt("id"),resultSet.getString("name"));  

        }   
    }

在Your Service类中调用该对象。

Circle circle = jdbcTemplate.queryForObject("SELECT * from circle where id = ?", new Object [] {id}, new CircleMapper());

对于您的情况，创建一个包含数据库列的模型类。创建一个映射器类，然后执行。

Spring jdbc - getJdbcTemplate（）。queryForList

2 个答案: