1.批量新增
mapper层:
java
Integer batchAdd(@Param("list")List<UserEntity> userEntity);
xml:
java
<insert id="batchAdd" parameterType="java.util.List">
INSERT INTO 表名(name, age, gender, psw, seq) values
<foreach collection="list" item="item" index="index" separator=",">
( #{item.name},#{item.age},#{item.gender},#{item.psw},#{item.seq})
</foreach>
</insert>
2.批量删除
mapper层:
java
Integer batchDelete(@Param("idList") List<Integer> idList);
xml:
java
<delete id="batchDelete" parameterType="java.util.List">
DELETE FROM 表名 where id in
<foreach collection="idList" item="item" separator="," open="(" close=")">
#{item}
</foreach>
</delete>
3.批量更新
mapper层:
java
Integer batchUpdateOneVariable(@Param("user") UserEntity user,@Param("idList") List idList);
xml:
java
<update id="batchUpdateOneVariable" >
UPDATE 表名 set psw=#{user.psw}
<where>
id in (
<if test="idList.size()!=0">
<foreach collection="idList" separator="," item="item" index="index">
#{item}
</foreach>
</if>
)
</where>
</update>
4.批量查询
mapper层:
java
List<UserEntity> batchSelect2(UserEntity2 userEntity2);
xml:
java
<select id="batchSelect2" parameterType="cn.com.exercise.batch.entity.UserEntity2" resultMap="user">
select * from 表名
<where>
id in
<foreach collection="ids" separator="," open="(" close=")" index="index" item="item">
#{item}
</foreach>
</where>
</select>