java8中使用stream流anyMatch筛选数据

在很多业务场景中我们可以用java8简化我们的代码:

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;


@ApiModel(description = "待发货的商品数量")
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Goods {

    @ApiModelProperty(value = "商品id")
    private  Integer goodsId;
    @ApiModelProperty(value = "数量")
    private  Integer  num;
}

 @Test
    public  void  test()  {
        //Goods 为实体类 属性:goodsId ,num
        List list1 = new ArrayList<>();//提交的数据
        List list2 = new ArrayList<>();//待发货
        List list3 = new ArrayList<>();//库存

        list1.add(new Goods(1,3));
        list1.add(new Goods(2,4));
        list1.add(new Goods(3,2));
        list1.add(new Goods(4,2));

        list2.add(new Goods(1,1));
        list2.add(new Goods(2,3));
        list2.add(new Goods(3,3));
        list2.add(new Goods(4,3));

        list3.add(new Goods(1,3));//不充足
        list3.add(new Goods(2,6));//不充足
        list3.add(new Goods(3,6));
        list3.add(new Goods(4,3));//不充足

        Map map = list2.stream().collect(Collectors.toMap(Goods::getGoodsId, Goods::getNum));//待发货
        List collect = list1.stream().filter(m1 -> list3.stream().anyMatch(
                m2 -> m1.getGoodsId().equals(m2.getGoodsId()) && m1.getNum() > m2.getNum() - (map.get(m1.getGoodsId()) == null ? 0 : map.get(m1.getGoodsId()))
                )).collect(Collectors.toList());
        System.out.println(collect);

    }

以上代码仅供参考