场景

在使用mybatis中@select@update等注解进行操作是，如何使用foreach条件。

使用方法

使用script标签定义sql，如下：

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import java.util.List;
@Mapper
public interface LizzMapper {
@Select({"<script> select id,name " +
" from t_lizz" +
" where id in" +
" <foreach collection="ids" index="index" item="item" open="(" separator="," close=")">" +
"
#{item}" +
" </foreach>" +
"</script>"})
List<Lizz> selectAllbyList(List<Integer> ids);
@Insert({"<script> insert into t_lizz(id,name)" +
" values" +
" <foreach collection="datas" item="item" separator="," >" +
"
(#{item.id},#{item.name})" +
" </foreach>" +
"</script>"})
insert selectAllbyList(List<Lizz> datas);
@Select({"<script> select id,name " +
" from t_lizz" +
" where id in" +
" <foreach collection="ids.split(',')" index="index" item="item" open="(" separator="," close=")">" +
"
#{item}" +
" </foreach>" +
"<if test='state != null'>" +
" and state= #{state} " +
"</if> " +
"</script>"})
List<AlertRule> selectAllByString(String ids,Integer state);
@Select({"<script> select id,name " +
" from t_lizz" +
" where " +
" <choose> "+
"
<when test='state != null and state!=0 '>" +
"
and state= #{state} " +
"
</when> " +
"
<otherwise>" +
"
and state= 0 " +
"
</otherwise> " +
" </choose> "+
"</script>"})
List<AlertRule> selectAllByString(String ids,Integer state);
}

最后

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