【java集合指定分组异步执行】

集合指定分组异步执行

先集合分组,指定分组后分批执行

@Test
public void testList() {
    List strings = Arrays.asList("1", "2", "3", "4");
    List> lists = averageGrouping(strings, 3);
    List strings1 = lists.get(0);
    new Thread(() -> {
        doSomething(strings1);
    }).start();
    List strings2 = lists.get(1);
    new Thread(() -> {
        doSomething(strings2);
    }).start();
    List strings3 = lists.get(2);
    new Thread(() -> {
        doSomething(strings3);
    }).start();
}

public void doSomething(List sou) {
    for (String s : sou) {
        System.out.println(Thread.currentThread().getName() + "结果" + s);
    }
}


public static List> averageGrouping(List souce, int n) {
    List> result = new ArrayList<>();
    int remainder = souce.size() % n;
    int number = souce.size() / n;
    int offset = 0;
    for (int i = 0; i < n; i++) {
        List value = null;
        if (remainder > 0) {
            value = souce.subList(i * number + offset, (i + 1) * number + offset + 1);
            remainder--;
            offset++;
        } else {
            value = souce.subList(i * number + offset, (i + 1) * number + offset);
        }
        result.add(value);
    }
    return result;
}