importjava.io.Serializable;importjava.lang.ref.ReferenceQueue;importjava.lang.ref.WeakReference;importjava.math.BigDecimal;importjava.math.RoundingMode;/*** 商品评价算法

*

* @project icomment

* @fileName ProductScore.java

* @Description

*@authorlight-zhang

* @date 2018年1月15日下午4:44:40

*@version1.0.0*/

public abstract class CommentUtils implementsSerializable {private static final long serialVersionUID = 8143504152635422263L;/*************************** 方案一 *******************************************/

private static final double baby_ratio = 0.837;//宝贝评价计算占比(0.837/千)

private static final double merchant_ratio = 0.113;//卖家态度计算占比(0.113/千)

private static final double logistics_ratio = 0.0278;//物流评价计算占比(0.0278/万)

private static final double aplatfrom_ration = 0.0037;//平台影响分A(0.0037/万)

private static final double bplatfrom_ration = 0.0185; //平台影响分B (0.0185/万)

private static final double basic_score = 4.7463;//最高分

/**************************************************************************/

/*** 方案一 宝贝占比较高,防止卖假货 宝贝评价 0.837(千分比) 5 卖家态度 0.113(千分比) 4 物流服务 0.0278(万分比) 3 平台影响

* 0.0037(万分比) 2 平台影响 0.0185(万分比) 1

*

*@return

*/

public static BigDecimal babyScore(int baby, int merchant, intlogistics) {double value = baby * baby_ratio + (merchant - 1) * merchant_ratio + (logistics - 2) *logistics_ratio+ (2 * aplatfrom_ration) + (1 *bplatfrom_ration);final BigDecimal result = getTemp(newBigDecimal(value));if (result.doubleValue() ==basic_score) {return result.setScale(0, RoundingMode.HALF_UP);

}return result.setScale(1, RoundingMode.HALF_UP);

}/**************************

* 方案二

************************************************/

private static final double syn_baby_ratio = 0.35;private static final double syn_merchant_ratio = 0.25;private static final double syn_logistics_ratio = 0.35;private static final double syn_aplatfrom_ration = 0.3;private static final double syn_bplatfrom_ration = 0.2;private static final double syn_basic_score = 4.6;/**************************************************************************/

/*** 综合占比率

*@parambaby

*@parammerchant

*@paramlogistics

*@return

*/

public static BigDecimal synthetical(int baby, int merchant, intlogistics) {double value = baby * syn_baby_ratio + (merchant - 1) *syn_merchant_ratio+ (logistics - 2) * syn_logistics_ratio + 2 * syn_aplatfrom_ration + 1 *syn_bplatfrom_ration;final BigDecimal result = getTemp(newBigDecimal(value));if (result.doubleValue() ==syn_basic_score) {return result.setScale(0, RoundingMode.HALF_UP);

}return result.setScale(1, RoundingMode.HALF_UP);

}/*** 宝贝梯度 梯度 0失望 1不满意 2一般 3满意 4惊喜 默认返回3满意

*

*@paramavgf

*@return

*/

public static int grads(doubleavgf) {return (avgf <= 1.5) ? 0: (avgf> 1.5 && avgf <= 2.3) ? 1: (avgf> 2.3 && avgf <= 3.1) ? 2: (avgf> 3.1 && avgf <= 4.0) ? 3 : (avgf > 4.0 && avgf <= 5.0) ? 4 : 3;

}private static T getTemp(T classOfType) {

ReferenceQueue queue = new ReferenceQueue();

WeakReference weakRef = new WeakReference(classOfType, queue);if (null ==weakRef.get()) {

weakRef= new WeakReference(classOfType);

}returnweakRef.get();

}public static voidmain(String[] args) {int baby = 2;int merchant = 2;int logistics = 5;

System.out.println("评测1 " + babyScore(baby, merchant, logistics));//方案一 防止卖假货采用方案

System.out.println("梯度1 >>>>> " +grads(babyScore(baby, merchant, logistics).doubleValue()));

System.out.println("评测2 " + synthetical(baby, merchant, logistics));//方案二 综合商家,宝贝,物流采用方案

System.out.println("梯度2 >>>>> " +grads(synthetical(baby, merchant, logistics).doubleValue()));

}

}