我尝试基于optaplanner车辆路线示例构建多日车辆路线。我创建了VehicleDay类来为一天的旅行建模车辆。 VehicleDay类是Vehicle对象和Day对象的连接。 这是课程：
public class Day extends AbstractPersistable {
protected int dayIndex;
protected int dayInt;
protected String day;
// getter and setter methods
...
}
public class Vehicle extends AbstractPersistable {
protected int capacity;
protected Depot depot;
// getter and setter methods
...
}
public class VehicleDay extends AbstractPersistable implements Standstill {
protected Vehicle vehicle;
protected Day day;
// Shadow variables
protected Customer nextCustomer;
// getter and setter methods
...
}
我将计划实体从Vehicle移到了VehicleDay。然后我尝试创建一个样本数据集（cvrp-72customers-edited.xml），其中包含8个车辆日和71个客户。我从cvrp-72customers获取此样本数据集，并将车辆容量修改为仅原始数据的3/4（22000）。 8个车辆日包括：
但是当我试图运行它时，结果是第1天的某些车辆没有被使用，而是计划者从第2天开始使用一些车辆（cvrp-72customers-edited-solved.xml）。我试图实现的是，计划者在第1天使用车辆，在使用第1天的所有车辆之后，然后计划员在第2天开始使用车辆。我尝试使用Comparator并创建了StandstillDifficultyComparator类：
public class StandstillDifficultyComparator implements Comparator<Standstill>, Serializable {
@Override
public int compare(Standstill a, Standstill b) {
if (a instanceof Customer) {
return new CompareToBuilder()
.append(((Customer)a).getId(), ((Customer)b).getId())
.toComparison();
} else {
return new CompareToBuilder()
.append(((VehicleDay)a).getDay().getDayIndex(), ((VehicleDay)b).getDay().getDayIndex())
.append(((VehicleDay)a).getId(), ((VehicleDay)b).getId())
.toComparison();
}
}
}
然后在unionMoveSelector配置中，我添加我的比较器类，如下所示：
<unionMoveSelector>
<changeMoveSelector>
<entitySelector>
<cacheType>PHASE</cacheType>
<selectionOrder>SORTED</selectionOrder>
<sorterComparatorClass>org.optaplanner.examples.vehiclerouting.domain.solver.StandstillDifficultyComparator</sorterComparatorClass>
<sorterOrder>ASCENDING</sorterOrder>
</entitySelector>
</changeMoveSelector>
<swapMoveSelector>
<entitySelector>
<cacheType>PHASE</cacheType>
<selectionOrder>SORTED</selectionOrder>
<sorterComparatorClass>org.optaplanner.examples.vehiclerouting.domain.solver.StandstillDifficultyComparator</sorterComparatorClass>
<sorterOrder>ASCENDING</sorterOrder>
</entitySelector>
</swapMoveSelector>
<tailChainSwapMoveSelector>
<entitySelector>
<cacheType>PHASE</cacheType>
<selectionOrder>SORTED</selectionOrder>
<sorterComparatorClass>org.optaplanner.examples.vehiclerouting.domain.solver.StandstillDifficultyComparator</sorterComparatorClass>
<sorterOrder>ASCENDING</sorterOrder>
</entitySelector>
</tailChainSwapMoveSelector>
<subChainChangeMoveSelector>
<selectReversingMoveToo>true</selectReversingMoveToo>
<entitySelector>
<cacheType>PHASE</cacheType>
<selectionOrder>SORTED</selectionOrder>
<sorterComparatorClass>org.optaplanner.examples.vehiclerouting.domain.solver.StandstillDifficultyComparator</sorterComparatorClass>
<sorterOrder>ASCENDING</sorterOrder>
</entitySelector>
</subChainChangeMoveSelector>
<subChainSwapMoveSelector>
<selectReversingMoveToo>true</selectReversingMoveToo>
<entitySelector>
<cacheType>PHASE</cacheType>
<selectionOrder>SORTED</selectionOrder>
<sorterComparatorClass>org.optaplanner.examples.vehiclerouting.domain.solver.StandstillDifficultyComparator</sorterComparatorClass>
<sorterOrder>ASCENDING</sorterOrder>
</entitySelector>
</subChainSwapMoveSelector>
</unionMoveSelector>
当我运行它时，会抛出异常：
Exception in thread "main" java.lang.IllegalArgumentException: Unmarshalling of solverConfigResource (org/optaplanner/examples/vehiclerouting/solver/vehicleRoutingSolverConfig.xml) fails on line number (53).
at org.optaplanner.core.impl.solver.XStreamXmlSolverFactory.configure(XStreamXmlSolverFactory.java:123)
at org.optaplanner.core.api.solver.SolverFactory.createFromXmlResource(SolverFactory.java:90)
at org.optaplanner.examples.common.app.CommonApp.createSolver(CommonApp.java:102)
at org.optaplanner.examples.common.app.CommonApp.createSolutionBusiness(CommonApp.java:97)
at org.optaplanner.examples.common.app.CommonApp.init(CommonApp.java:84)
at org.optaplanner.examples.common.app.CommonApp.init(CommonApp.java:80)
at org.optaplanner.examples.vehiclerouting.app.VehicleRoutingApp.main(VehicleRoutingApp.java:34)
Caused by: " com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter$UnknownFieldException: No such field org.optaplanner.core.config.heuristic.selector.move.generic.chained.SubChainChangeMoveSelectorConfig.entitySelector
---- Debugging information ----
message : No such field org.optaplanner.core.config.heuristic.selector.move.generic.chained.SubChainChangeMoveSelectorConfig.entitySelector
field : entitySelector
class : org.optaplanner.core.config.heuristic.selector.move.generic.chained.SubChainChangeMoveSelectorConfig
required-type : org.optaplanner.core.config.heuristic.selector.move.generic.chained.SubChainChangeMoveSelectorConfig
converter-type : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
line number : 53
class[1] : org.optaplanner.core.config.heuristic.selector.move.composite.UnionMoveSelectorConfig
class[2] : org.optaplanner.core.config.localsearch.LocalSearchPhaseConfig
class[3] : org.optaplanner.core.config.solver.SolverConfig
version : 1.4.10
-------------------------------
at org.optaplanner.core.impl.solver.XStreamXmlSolverFactory.configure(XStreamXmlSolverFactory.java:123)
at org.optaplanner.core.api.solver.SolverFactory.createFromXmlResource(SolverFactory.java:90)
at org.optaplanner.examples.common.app.CommonApp.createSolver(CommonApp.java:102)
at org.optaplanner.examples.common.app.CommonApp.createSolutionBusiness(CommonApp.java:97)
at org.optaplanner.examples.common.app.CommonApp.init(CommonApp.java:84)
at org.optaplanner.examples.common.app.CommonApp.init(CommonApp.java:80)
at org.optaplanner.examples.vehiclerouting.app.VehicleRoutingApp.main(VehicleRoutingApp.java:34)
如何让计划员在第1天首先使用所有车辆，然后在第2天使用车辆？
答案 0 :(得分：1)
我认为您需要创建一个评分规则，奖励OptaPlanner按顺序安排日期。所以在规则中你可以说，如果第X-1天尚未满，那么在第X天预定的每辆车都会扣除一分。