無法使用MyBatis批量插入Oracle DB

Question

我嘗試使用MyBatis（與Spring集成）在Oracle數據庫的表中進行批量插入。

它是mapper界面中方法的定義：

public void savePayments(@Param("payments") List<MassPaymentItem> payments);

這是MyBatis XML映射器代碼：

<insert id="savePayments" parameterType="MassPaymentFileItem" useGeneratedKeys="false">
    INSERT INTO mass_payments
        (payment_id, file_id, msisdn, amount, status)
    <foreach collection="payments" item="payment" index="index" separator=" UNION ALL ">
        SELECT SEQ_MASS_PAYMENT.nextval, #{payment.fileId}, #{payment.msisdn}, #{payment.amount}, 0 FROM DUAL
    </foreach>
</insert>

執行此操作時，我收到MyBatisSystemException，消息為“嵌套異常為org.apache.ibatis.builder.BuilderException：內聯參數映射格式不正確。應為：＃{propName，attr1 = val1，attr2 = val2}”

怎么了？ 如何解決？

Answer 1

我在這里找到解決方案

<insert id="savePayments">
   INSERT ALL
   <foreach collection="payments" item="payment">
   INTO
      mass_payments_t (payment_id, file_id, msisdn, amount)
   VALUES
      (seq_mass_payment.nextval, #{payment.fileId, javaType=Integer, jdbcType=NUMERIC}, #{payment.msisdn, javaType=String, jdbcType=VARCHAR}, #{payment.amount, javaType=BigDecimal, jdbcType=NUMERIC})
   </foreach>
   SELECT * FROM dual
</insert>

Answer 2

我發現第一個答案對我不起作用，然后我找到了另一個解決方案，如下所示：

 <insert id="savePayments" parameterType="java.util.List" useGeneratedKeys="true">
       <selectKey resultType="java.lang.Integer" keyProperty="payment_id"
            order="BEFORE">
            SELECT SEQ_MASS_PAYMENT.nextval as payment_id FROM DUAL
        </selectKey>
        INSERT INTO mass_payments
            (payment_id, file_id, msisdn, amount, status)
            select SEQ_MASS_PAYMENT.nextval, A.* from (
        <foreach collection="payments" item="payment" index="index" separator="UNION ALL">
            SELECT 
            #{payment.fileId} as file_id,
            #{payment.msisdn} as msisdn,
            #{payment.amount} as amount,
            0 as status
            FROM DUAL
        </foreach> ) A
    </insert>

Answer 3

請仔細查看您的select語句。 如果需要列名或函數，則可以傳遞參數。 您應該將其更改為類似（注意from的位置：

<foreach collection="payments" item="payment" index="index" separator=" UNION ALL ">
        (SELECT SEQ_MASS_PAYMENT.nextval from DUAL), #{payment.fileId}, #{payment.msisdn}, #{payment.amount}, 0 
    </foreach>