标签：pre 代码 plain sel ids lin close foreach tail
mybatis批量查询
注意这里的 in 和 <trim prefix="(" suffix=")"> 以及 in ( ）的三种方式的（例1（推荐），例2，例3（推荐））等价使用
例1：
|
1
|
List<UBaseMenu> findMenuName(List<String> valueList); |
<select id="findMenuName" resultType="java.lang.String" parameterType="java.util.List">
select menu_name
from menu
where menu_id in
<foreach collection="list" item="valueList" open="(" close=")" separator=",">
#{valueList}
</foreach>
</select>
例2：
List<ReturnCodeEntity> selectByIds(@Param("ids") List<Long> ids);
<select id="selectByIds" parameterType="java.util.List"
resultType="com.paic.ocss.gateway.model.entity.ReturnCodeEntity">
SELECT
id,
code,
message,
recommendation,
status
FROM openapi_return_code
WHERE id in
<trim prefix="(" suffix=")">
<foreach collection="ids" index="index" item="id" separator=",">
#{id}
</foreach>
</trim>
</select>
例3：
mapper接口代码：
public List<User> findUserListByIdList(List<Long> idList);
xml代码：
<select id="findUserListByIdList" parameterType="java.util.ArrayList" resultType="User">
select * from user user
<where>
user.ID in (
<foreach collection="list" item="id" index="index" separator=",">
#{id}
</foreach>
)
</where>
</select>
批量插入:
mapper.java
int addResource(List<Resource> ResourceList);
mapper.xml
<insert id="addResource" parameterType="java.util.List">
insert into resource (object_id, res_id, res_detail_value,
res_detail_name)
values
<foreach collection="list" item=" ResourceList " index="index" separator=",">
(#{ResourceList.objectId,jdbcType=VARCHAR},
#{ResourceList.resId,jdbcType=VARCHAR},
#{ResourceList.resDetailValue,jdbcType=VARCHAR},
#{ResourceList.resDetailName,jdbcType=VARCHAR}
)
</foreach>
</insert>
批量更新:
mapper.java
int updateRoles(List<String> roleList);
mapper.xml
<update id="updateRoles" parameterType="java.util.List">
update role
set enabled = ‘0‘
where role_id in <foreach collection="list" item="roleIds" index="index" open="(" separator="," close=")">
#{roleIds}
</foreach>
</update>
标签：pre 代码 plain sel ids lin close foreach tail
原文地址：https://www.cnblogs.com/zhuyeshen/p/12009819.html
