Java Mybatis foreach嵌套foreach List<list<Object>>问题

 public static void main(String[] args) {
        List<List<Map<String, Object>>> mapsList = new ArrayList<>();
        List<Map<String, Object>> maps = new ArrayList<>();
        List<Map<String, Object>> maps1 = new ArrayList<>();
        Map<String, Object> map = new HashMap<>();
        map.put("fydm","3212");
        map.put("ajbs","321200000006229");
        maps.add(map);
        Map<String, Object> map1 = new HashMap<>();
        map1.put("fydm","3212");
        map1.put("ajbs","321200000006229");
        maps.add(map1);
        List<Map<String, Object>> maps2 = new ArrayList<>();
        Map<String, Object> map2 = new HashMap<>();
        map2.put("fydm","3212");
        map2.put("ajbs","321200000006229");
        maps1.add(map2);
        Map<String, Object> map3 = new HashMap<>();
        map3.put("fydm","3212");
        map3.put("ajbs","321200000006229");
        maps1.add(map3);
        mapsList.add(maps);
        mapsList.add(maps1);
        for (List<Map<String, Object>> mapList : mapsList) {
            for (Map<String, Object> stringObjectMap : mapList) {
                System.out.println(stringObjectMap.get("fydm")+"----"+ stringObjectMap.get("ajbs"));
            }
        }
        baseMapper.insertInfoDocumentsBatch(mapsList);
}

<insert id="insertInfoDocumentsBatch" parameterType="java.util.List">
    insert ignore hlwft_documents
    (
        document_name,
        documents_number
    )
    values
    <!-- mapsList: 也就是这个
    			List<List<Map<String, Object>>> mapsList = new ArrayList<>();
	-->
    <!-- mapListData: 也就是这个
 			    List<Map<String, Object>> maps = new ArrayList<>();
        		List<Map<String, Object>> maps1 = new ArrayList<>();
	-->
    <!-- map: 也就是这个
 			    Map<String, Object> map = new HashMap<>();
	-->
	 <!-- separator=",": 这个重要是在每次循环的最后加上,-->
	 <!-- close=",": 这个是在所有都循环的最后加上,-->
    <foreach  item="mapListData" collection="mapsList" separator=","  index="index1">
        <foreach  item="map" collection="mapListData" separator="," index="index2">
            (
            #{map.fydm},
            #{map.ajbs}
            )
        </foreach>
    </foreach>
    <!-- 和Java for循环一致
    for (List<Map<String, Object>> mapListData: mapsList) {
            for (Map<String, Object> map : mapListData) {
                System.out.println(map.get("fydm")+"----"+ map.get("ajbs"));
            }
        }
        -->
</insert>