【java】【mybatis】在使用mybatis进行批量插入，批量更新等批量操作时，切割In集合List进行分批批量操作的java中的切割代码

　　　　　　
红字部分代表mybatis的批量操作调用方法：

　　　　　　　int num = 0;
            int maxLength = 200;
            int size = usableCodes.size();
            if (size <= maxLength) {
                bean  = createBean(bean,entity,usableCodes);
                num = receiptMapper.receipt(bean);
            } else {
                // 计算循环次数
                int eachTime = (size / maxLength) + 1;
                for (int i = 0; i < eachTime; i++) {
                    int fromIndex = 0;
                    int toIndex = 0;
                    fromIndex = (i * maxLength);
                    toIndex = (fromIndex + maxLength);
                    if (i + 1 == eachTime) {
                        toIndex = usableCodes.size();
                    }
                    List<String> subList = usableCodes.subList(fromIndex, toIndex);
                    if (subList.size() > 0) {
                        bean = createBean(bean,entity,subList);
                        num += receiptMapper.receipt(bean);
                    }
                }
            }