分批调用接口的实现

public class BatchCall {
    private static final Integer SIZE_5 = 5;
    @Test
    public void test1() {
        List<Integer> list = new ArrayList<>();
        for ( int i = 0; i < 123; i++ ) {
            // 这实际有一个自动装箱的过程 Integer.valueOf(i);
            list.add(i);
        }
        int startIndex;
        int endIndex;
        List<Integer> subList = new ArrayList<>();
        for (int i = 0; i < list.size() / SIZE_5 + 1 ; i++) {
            startIndex = i * SIZE_5;
            endIndex = Math.min(startIndex + SIZE_5, list.size());
            subList = list.subList(startIndex, endIndex);
            if (subList.size() > 0) {
                System.out.println(subList);
            }
        }
    }
}