一、代码层面切割好list，然后插入

// package org.apache.commons.collections4; 先将list切成1000条一份
List<List<DeptDO>> p1 = ListUtils.partition(deptList, 1000);
for (List<DeptDO> deptDOS : p1) {
// 1000条一次批量插入systemDeptMapper.insertBatch(deptDOS);
}

二、使用mybatisplus批量插入方法

    /*** 插入（批量）** @param entityList 实体对象集合*/public static <T> boolean saveBatch(Collection<T> entityList) {return saveBatch(entityList, IService.DEFAULT_BATCH_SIZE);}/*** 插入（批量）** @param entityList 实体对象集合* @param batchSize  插入批次数量*/public static <T> boolean saveBatch(Collection<T> entityList, int batchSize) {if (CollectionUtils.isEmpty(entityList)) {return false;}Class<T> entityClass = getEntityClass(entityList);Class<?> mapperClass = ClassUtils.toClassConfident(getTableInfo(entityClass).getCurrentNamespace());String sqlStatement = SqlHelper.getSqlStatement(mapperClass, SqlMethod.INSERT_ONE);return SqlHelper.executeBatch(entityClass, LogFactory.getLog(Db.class), entityList, batchSize, (sqlSession, entity) -> sqlSession.insert(sqlStatement, entity));}