mybatis: foreach实现in集合查询(mybatis 3.5.7)

一，示例代码：

1，OrderController.java

        List<Cart> cartList = cartService.getAllCartByCartId(userId,cartIds,configBeanValue.goodsImagesHost,configBeanValue.attrHost);

2,CartServiceImpl.java

    @Override
    public List<Cart> getAllCartByCartId(Long userId,Long[] cartIds,String urlHost,String urlHostAttr) {
        //List<Cart> listCart = cartMapper.selectAllCartByUserId(userId);
        List<Cart> listCart = cartMapper.selectAllCartByCartId(userId,cartIds);
...

3,CartMapper.java

List<Cart> selectAllCartByCartId(@Param("userId")Long userId, @Param("cartIds")Long[] cartIds);

4,CartMapper.xml

    <select id="selectAllCartByCartId" resultType="com.yj.storeback.pojo.Cart">
        select c.* from cart as c,goods as g where c.userId=#{userId} and c.goodsId=g.goodsId and g.isSale=1 and c.cartId IN
        <foreach collection="cartIds" item="id" index="index"
                 open="(" close=")" separator=",">
            #{id}
        </foreach>
        order by c.cartId desc
    </select>

说明：刘宏缔的架构森林是一个专注架构的博客，地址：https://www.cnblogs.com/architectforest

         对应的源码可以访问这里获取： https://github.com/liuhongdi/
         或: https://gitee.com/liuhongdi

说明：作者:刘宏缔 邮箱: 371125307@qq.com

二，测试效果

查看sql查询的日志:

Creating a new SqlSession
SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7cd7fbe6] was not registered for synchronization because synchronization is not active
JDBC Connection [HikariProxyConnection@1874055310 wrapping com.mysql.cj.jdbc.ConnectionImpl@6052b4a0] will not be managed by Spring
==>  Preparing: select c.* from cart as c,goods as g where c.userId=? and c.goodsId=g.goodsId and g.isSale=1 and c.cartId IN ( ? , ? ) order by c.cartId desc
==> Parameters: 1(Long), 25(Long), 24(Long)
<==    Columns: cartId, isDirect, userId, goodsId, skuId, goodsName, skuAttrNames, skuAttrIds, price, amount, addTime, isCheck, packType, addFrom
<==        Row: 25, 0, 1, 1, 22, 元気森林苏打水气泡水无糖饮料元气水, 480ml, 58, 44.00, 4, 2022-02-25 17:15:12, 1, 2, wap
<==        Row: 24, 0, 1, 2, 1, 张裕 第九代特选级解百纳7, dd_22, 2_4, 8.00, 4, 2022-02-24 19:01:29, 1, 2, wap
<==      Total: 2
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7cd7fbe6]

前端效果:

三，查看mybatis的版本: