从List集合中每次处理固定条数的数据+计算一个数字是几位数

从List集合每次处理固定条数数据

public void dealBySubList(List sourList, int batchCount) {
        int sourListSize = sourList.size();
        int subCount = sourListSize % batchCount == 0 ? sourListSize / batchCount : sourListSize / batchCount + 1;
        int startIndext = 0;
        int stopIndext = 0;
        for (int i = 0; i < subCount; i++) {
            stopIndext = (i == subCount - 1) ? stopIndext + sourListSize % batchCount : stopIndext + batchCount;
            List list = sourList.subList(startIndext, stopIndext);
            startIndext = stopIndext;
            // 循环调用，每次100条
            具体逻辑处理上面的list
        }
    }

计算一个数字是几位数

public static int getNumLenght(Long num){
        num = num>0?num:-num;
        if (num==0) {
            return 1;
        }
        return (int) Math.log10(num)+1;
    }