list分割成满足和不满足条件的集合（partitioningBy）

一：集合对象实体

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;

    /**
     * 订单类型  1为美团 2其他
     */
    private String orderType;
}

二：运行案例

package cn.nhdc.cloud.common.annotation;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class Test11 {
    public static void main(String[] args) {
        List<Order> orders = new ArrayList<Order>() {
   {
            add(Order.builder().orderId("1").orderName("订单1").orderType("1").build());
            add(Order.builder().orderId("2").orderName("订单2").orderType("1").build());
            add(Order.builder().orderId("3").orderName("订单3").orderType("1").build());
            add(Order.builder().orderId("4").orderName("订单4").orderType("1").build());
            add(Order.builder().orderId("5").orderName("订单5").orderType("1").build());
            add(Order.builder().orderId("6").orderName("订单6").orderType("2").build());
            add(Order.builder().orderId("7").orderName("订单7").orderType("2").build());
            add(Order.builder().orderId("8").orderName("订单8").orderType("3").build());
        }};
        //按照条件分割 满足和不满足条件的两个集合
        Map<Boolean, List<Order>> collect = orders.parallelStream().collect(Collectors.partitioningBy(order -> "1".equals(order.getOrderType())));
        System.err.println(collect);
    }
}

三：运行结果

{
false=[Order(orderId=6, orderName=订单6, orderType=2), Order(orderId=7, orderName=订单7, orderType=2), Order(orderId=8, orderName=订单8, orderType=3)], 
true=[Order(orderId=1, orderName=订单1, orderType=1), Order(orderId=2, orderName=订单2, orderType=1), Order(orderId=3, orderName=订单3, orderType=1), Order(orderId=4, orderName=订单4, orderType=1), Order(orderId=5, orderName=订单5, orderType=1)]
}