基于Drools规则引擎的实例

package com.sample; import org.drools.KnowledgeBase; import org.drools.KnowledgeBaseFactory; import org.drools.builder.KnowledgeBuilder; import org.drools.builder.KnowledgeBuilderError; import org.drools.builder.KnowledgeBuilderErrors; import org.drools.builder.KnowledgeBuilderFactory; import org.drools.builder.ResourceType; import org.drools.io.ResourceFactory; import org.drools.logger.KnowledgeRuntimeLogger; import org.drools.logger.KnowledgeRuntimeLoggerFactory; import org.drools.runtime.StatefulKnowledgeSession; public class EmployTest { public static void main(String[] args) { // TODO Auto-generated method stub try { // load up the knowledge base KnowledgeBase kbase = readKnowledgeBase(); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test"); // go ! Employ emp = new Employ(); emp.setEduInfo("master"); emp.setResume("tech"); emp.setAnnualExam("good"); emp.setAwardPunish("award"); ksession.insert(emp); ksession.startProcess("No-1"); ksession.fireAllRules(); System.out.println("Basic Salary: " + emp.getBasicSalary()); System.out.println("Duty Salary: " + emp.getDutySalary()); System.out.println("Bonus : " + emp.getBonus()); System.out.println("rate : " + emp.getPercent()); System.out.printf("Total Salary: %.0f", emp.getTotalSalary()); logger.close(); } catch (Throwable t) { t.printStackTrace(); } } private static KnowledgeBase readKnowledgeBase() throws Exception { KnowledgeBuilder kbuilder =KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource("EduInfoRule.drl"),ResourceType.DRL); kbuilder.add(ResourceFactory.newClassPathResource("ResumeRule.drl"),ResourceType.DRL); kbuilder.add(ResourceFactory.newClassPathResource("BonusRule.drl"),ResourceType.DRL); kbuilder.add(ResourceFactory.newClassPathResource("AwardPunish.drl"),ResourceType.DRL); kbuilder.add(ResourceFactory.newClassPathResource("TotalRule.drl"),ResourceType.DRL); kbuilder.add(ResourceFactory.newClassPathResource("simple.rf"),ResourceType.DRF); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error : errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); return kbase; } }