我使用 OtpaPlanner 来优化车辆路线扩展。我有硬分和软分,但是当我尝试显示约束匹配详细信息时,我收到了这条消息:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.getConstraintMatchTotals(DroolsScoreDirector.java:98)
at org.optaplanner.examples.common.business.SolutionBusiness.getConstraintMatchTotalList(SolutionBusiness.java:239)
错误行可能是这样的: kieSession.fireAllRules();