list大集合等比分割成多个小list集合

一:实体对象准备

package cn.nhdc.cloud.common.annotation;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@NoArgsConstructor
@AllArgsConstructor
@Data
@Builder
public class Order {

    /**
     * 订单id
     */
    private String orderId;
    /**
     * 订单名称
     */
    private String orderName;
}

二：测试案例

package cn.nhdc.cloud.common.annotation;

import cn.hutool.core.collection.ListUtil;
import java.util.ArrayList;
import java.util.List;

public class Test11 {
    public static void main(String[] args) {
        List<Order> orders = new ArrayList<Order>() {
   {
            add(Order.builder().orderId("1").orderName("订单1").build());
            add(Order.builder().orderId("2").orderName("订单2").build());
            add(Order.builder().orderId("3").orderName("订单3").build());
            add(Order.builder().orderId("4").orderName("订单4").build());
            add(Order.builder().orderId("5").orderName("订单5").build());
            add(Order.builder().orderId("6").orderName("订单6").build());
            add(Order.builder().orderId("7").orderName("订单7").build());
        }};
        List<List<Order>> partition = ListUtil.partition(orders, 2);
        System.err.println(partition);
        List<List<Order>> split = ListUtil.split(orders, 3);
        System.err.println(split);
    }
}

三：运行结果

[
 [Order(orderId=1, orderName=订单1), Order(orderId=2, orderName=订单2)],
 [Order(orderId=3, orderName=订单3), Order(orderId=4, orderName=订单4)], 
 [Order(orderId=5, orderName=订单5), Order(orderId=6, orderName=订单6)], 
 [Order(orderId=7, orderName=订单7)]
 ]
 
[
 [Order(orderId=1, orderName=订单1), Order(orderId=2, orderName=订单2), Order(orderId=3, orderName=订单3)], 
 [Order(orderId=4, orderName=订单4), Order(orderId=5, orderName=订单5), Order(orderId=6, orderName=订单6)],
 [Order(orderId=7, orderName=订单7)]
 ]