需要使用的切割list集合的工具类，链接：https://www.cnblogs.com/sxdcgaq8080/p/9376947.html
处理逻辑，原本的一个LIst，进行切割，循环进行mybatis查询即可
举个例子：
mapper.xml中方法查询如下：
<select
id="dealFindByNameAndMobile"
parameterType="com.pisen.cloud.luna.ms.dealer.base.mapper.bean.DealerBean"
resultType="com.pisen.cloud.luna.ms.dealer.base.domain.Dealer"> SELECT
dea.id id,
dea.uid uid,
dea.enabled_flag enabledFlag,
dea.delete_flag deleteFlag,
dea.tenement_id tenementId,
dea.parent_id parentId,
dea.name name,
dea.type type,
dea.bar_code barCode,
dea.outer_code outerCode,
dea.outer_id outerId,
dea.mne_code mneCode,
dea.address address,
dea.address_xy addressXy,
dea.business_area businessArea,
dea.business_area_xy businessAreaXy FROM
dealer AS dea
LEFT JOIN (SELECT a.* FROM contact AS a where a.main_contact = ${@com.pisen.cloud.luna.ms.dealer.base.domain.Contact@IS_MAIN} AND a.delete_flag = ${@com.pisen.cloud.luna.ms.dealer.base.common.BaseDomain@DELETE_FLAG_NO} AND a.enabled_flag = ${@com.pisen.cloud.luna.ms.dealer.base.common.BaseDomain@ENABLED_FLAG_EN}) con ON dea.uid = con.dealer_id WHERE
dea.delete_flag = ${@com.pisen.cloud.luna.ms.dealer.base.common.BaseDomain@DELETE_FLAG_NO} AND
dea.enabled_flag = ${@com.pisen.cloud.luna.ms.dealer.base.common.BaseDomain@ENABLED_FLAG_EN} <if test="name != null and name != '' ">
AND
dea.name LIKE '%' #{name} '%'
</if> AND
dea.uid IN
<foreach collection="uidList" open="(" close=")" separator="," item="item" index="index">
#{item}
</foreach>
对应mapper.java中方法也是同名方法：
List<Dealer> dealFindByNameAndMobile(DealerBean bean);
这个DealerBean呢则是为了查询专门封装的一个java类
import java.util.List;
public class DealerBean {
private String name;
private String mobile;
private List<String> uidList;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public List<String> getUidList() {
return uidList;
}
public void setUidList(List<String> uidList) {
this.uidList = uidList;
}
}
在serviceImpl中调用这个mapper的方法处，进行的分批次切割处理：【此处调用的工具类的方法，请查看上面链接处】
@Override
public List<Dealer> findDealerList(DealerBean bean) { List<String> list = bean.getUidList();
List<List<String>> result = ListUtils.splitListBycapacity(list,100); List<Dealer> allDealer = new ArrayList<>();
for (List<String> strings : result) {
bean.setUidList(strings);
allDealer.addAll(dealerMapper.dealFindByNameAndMobile(bean));
} return allDealer;
}
这样即可完成IN在mybatis中的分批次查询