包裹分箱 算法

包裹 分箱简单算法  算出临界值 分箱数量加1
/**
     *预估分箱算法
     * @return
     */
 

  private Tuple2<BigDecimal,Integer>  calculateFareAndNums(List<BigDecimal> list,PxChannelPrice price){
        if(list==null||list.isEmpty()){
            Tuple2.of(BigDecimal.ZERO,0);
        }
        Collections.sort((List<BigDecimal>) list, new Comparator<BigDecimal>() {
            @Override
            public int compare(BigDecimal o1, BigDecimal o2) {
                return o2.compareTo(o1);
            }
        });
        BigDecimal taxSum = BigDecimal.ZERO;//税费
        BigDecimal taxLmt = new BigDecimal(50);//税费限制
        int  bagCnt = 0;//分包数量
        for (int i = 0;i<list.size();i++){
            BigDecimal decimal = list.get(i);

            if(decimal.compareTo(taxLmt)>-1){
                bagCnt++;
            }else {
                if(taxSum.add(decimal).compareTo(taxLmt)>-1){
                    bagCnt++;
                    taxSum = decimal;
                }else{
                    taxSum = taxSum.add(decimal);

                }
            }
        }
        if(taxSum.compareTo(BigDecimal.ZERO)==1){
            bagCnt++;
        }
        return Tuple2.of(new BigDecimal(bagCnt).multiply(price.getInitialWeightPrice()),bagCnt);
 }




public class Tuple2<V1, V2> {

    private final V1 v1;
    private final V2 v2;

    public Tuple2(V1 t1, V2 t2) {
        this.v1 = t1;
        this.v2 = t2;
    }

    public static <V1, V2> Tuple2<V1, V2> of(V1 v1, V2 v2) {
        return new Tuple2<>(v1, v2);
    }

    public V1 _1() {
        return v1;
    }

    public V2 _2() {
        return v2;
    }

    @Override
    public String toString() {
        return "(" + v1 + "," + v2 + ')';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;

        Tuple2<?, ?> tuple2 = (Tuple2<?, ?>) o;

        if (!v1.equals(tuple2.v1))
            return false;
        return v2.equals(tuple2.v2);

    }

    @Override
    public int hashCode() {
        int result = v1.hashCode();
        result = 31 * result + v2.hashCode();
        return result;
    }
}