Mybatis傳遞多個參數的幾種方式

順序傳參法

public User selectUser(String name, int deptId);

<select id="selectUser" resultMap="UserResultMap">
    select * from user
    where user_name = #{0} and dept_id = #{1}
</select>

#{}里面的數字代表你傳入參數的順序。

這種方法不建議使用，sql層表達不直觀，且一旦順序調整容易出錯。

@Param注解傳參法

public User selectUser(@Param("userName") String name, int @Param("deptId") deptId);

<select id="selectUser" resultMap="UserResultMap">
    select * from user
    where user_name = #{userName} and dept_id = #{deptId}
</select>

#{}里面的名稱對應的是注解@Param括號里面修飾的名稱。

這種方法在參數不多的情況還是比較直觀的，推薦使用。

Map傳參法

public User selectUser(Map<String, Object> params);

<select id="selectUser" parameterType="java.util.Map" resultMap="UserResultMap">
    select * from user
    where user_name = #{userName} and dept_id = #{deptId}
</select>

#{}里面的名稱對應的是Map里面的key名稱。

這種方法適合傳遞多個參數，且參數易變能靈活傳遞的情況。

PS:
MyBatis傳遞map參數時，如果傳遞參數中沒有對應的key值，在執行sql語句時默認取的是null

例如：map中沒有put “name”這個key，在sql中使用#{name}時，默認賦值null

Java Bean傳參法

public User selectUser(User params);

<select id="selectUser" parameterType="com.test.User" resultMap="UserResultMap">
    select * from user
    where user_name = #{userName} and dept_id = #{deptId}
</select>

#{}里面的名稱對應的是User類里面的成員屬性。

這種方法很直觀，但需要建一個實體類，擴展不容易，需要加屬性，看情況使用。

 

 

SELECT top 10000 tol.TuhuCost,tol.BaseCost,tol.OrderID AS OrderListOrderID,torp.ChildrenOrderId, torp.ParentOrderId,tol.pkid as OrderListID,torp.RelationshipType,tor.InstallShopID,tor.WareHouseID
FROM dbo.tbl_OrderRelationship AS torp WITH(NOLOCK)
LEFT JOIN dbo.tbl_OrderList AS tol WITH(NOLOCK)
ON torp.ParentOrderId = tol.OrderID
left JOIN vw_tbl_order as tor ON torp.ParentOrderId=tor.PKID
WHERE torp.CreateDatetime>='2019-11-29'
AND torp.RelationshipType = 1
AND tor.InstallShopID IS NOT NULL
AND tor.InstallShopID<>tor.WareHouseID
AND tor.Status<>'7Canceled'
AND tol.TuhuCost is not NULL
ORDER BY torp.CreateDatetime DESC

 

SELECT COUNT (1) as cnt FROM (
SELECT DISTINCT tol.OrderID
FROM dbo.tbl_OrderRelationship AS torp WITH(NOLOCK)
LEFT JOIN dbo.tbl_OrderList AS tol WITH(NOLOCK)
ON torp.ParentOrderId = tol.OrderID
left JOIN vw_tbl_order as tor ON torp.ParentOrderId=tor.PKID
WHERE torp.CreateDatetime>='2019-11-29'
AND torp.RelationshipType = 1
AND tor.InstallShopID IS NOT NULL
AND tor.InstallShopID<>tor.WareHouseID
AND tor.Status<>'7Canceled' AND tol.baseCost=0
AND tol.TuhuCost is not NULL ) as t1

 

SELECT COUNT(1) as cnt from tbl_orderlist as t1 with(nolock)  left join vw_tbl_order as t2 with(nolock) ON t1.orderid=t2.pkid WHERE t2.OrderDatetime>='2019-12-01'  AND t1.cost>0 AND t1.baseCost=0