mybatis返回map<list>

MyBatis can return a `Map<List>` by configuring the result map appropriately. Here are the steps to achieve this:

1. Define a ResultMap in your MyBatis configuration XML file:

<resultMap id="myResultMap" type="java.util.Map">
  <collection property="myList" ofType="java.util.List" resultMap="nestedResultMap"/>
</resultMap>

<resultMap id="nestedResultMap" type="your.package.YourClass">
  <!-- your nested result mappings -->
</resultMap>

2. Use the defined ResultMap in your SQL query:

<select id="yourQuery" resultMap="myResultMap">
  <!-- your SQL query -->
</select>

3. In your Java code, retrieve the result as a `Map<List>`:

Map<String, List<YourClass>> resultMap = sqlSession.selectOne("yourQuery");
List<YourClass> myList = resultMap.get("myList");

Make sure to replace `your.package.YourClass` with the appropriate class that represents the elements of the list you want to retrieve.