版本
SpringBoot 3.2.0
JDK 17
Drools 9.44.0.Final
pom.xml 相关依赖
<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.2.0</version><relativePath/> <!-- lookup parent from repository --> </parent><properties><java.version>17</java.version><drools-version>9.44.0.Final</drools-version> </properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-aop</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>commons-lang</groupId><artifactId>commons-lang</artifactId><version>2.6</version></dependency><!--drools 规则引擎--><dependency><groupId>org.drools</groupId><artifactId>drools-core</artifactId><version>${drools-version}</version></dependency><dependency><groupId>org.drools</groupId><artifactId>drools-compiler</artifactId><version>${drools-version}</version></dependency><dependency><groupId>org.drools</groupId><artifactId>drools-templates</artifactId><version>${drools-version}</version></dependency><dependency><groupId>org.kie</groupId><artifactId>kie-api</artifactId><version>${drools-version}</version></dependency><dependency><groupId>org.drools</groupId><artifactId>drools-decisiontables</artifactId><version>${drools-version}</version></dependency><dependency><groupId>org.drools</groupId><artifactId>drools-xml-support</artifactId><version>${drools-version}</version></dependency><dependency><groupId>org.kie</groupId><artifactId>kie-ci</artifactId><version>${drools-version}</version></dependency><!--lombok插件--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies>
配置文件
@Configuration public class DroolsConfig {// 指定规则文件存放的目录private static final String RULES_PATH = "rules/";private final KieServices kieServices = KieServices.Factory.get();@Bean@ConditionalOnMissingBeanpublic KieFileSystem kieFileSystem() throws IOException {System.setProperty("drools.dateformat", "yyyy-MM-dd");KieFileSystem kieFileSystem = kieServices.newKieFileSystem();ResourcePatternResolver resourcePatternResolver =new PathMatchingResourcePatternResolver();Resource[] files =resourcePatternResolver.getResources("classpath*:" + RULES_PATH + "*.*");String path = null;for (Resource file : files) {path = RULES_PATH + file.getFilename();kieFileSystem.write(ResourceFactory.newClassPathResource(path, "UTF-8"));}return kieFileSystem;}@Bean@ConditionalOnMissingBeanpublic KieContainer kieContainer() throws IOException {KieRepository kieRepository = kieServices.getRepository();kieRepository.addKieModule(kieRepository::getDefaultReleaseId);KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem());kieBuilder.buildAll();return kieServices.newKieContainer(kieRepository.getDefaultReleaseId());}@Bean@ConditionalOnMissingBeanpublic KieBase kieBase() throws IOException {return kieContainer().getKieBase();}}
规则文件 calculation.drl 文件路径: resources/rules/calculation.drl
//package calculation import com.example.calculation.entity.Calculationrule "个人所得税：计算应纳税所得额"enabled truesalience 3no-loop truedate-effective "2011-09-01" //生效日期when$cal : Calculation(wage>0)then$cal.setWagemore($cal.getWage()-3500);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额<=1500"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore <= 1500)then$cal.setCess(0.03);$cal.setPreminus(0);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额在1500至4500之间"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore > 1500 && wagemore <= 4500)then$cal.setCess(0.1);$cal.setPreminus(105);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额在4500志9000之间"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore > 4500 && wagemore <= 9000)then$cal.setCess(0.2);$cal.setPreminus(555);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额在9000志35000之间"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore > 9000 && wagemore <= 35000)then$cal.setCess(0.25);$cal.setPreminus(1005);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额在35000至55000之间"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore > 35000 && wagemore <= 55000)then$cal.setCess(0.3);$cal.setPreminus(2755);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额在55000至80000之间"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore > 55000 && wagemore <= 80000)then$cal.setCess(0.35);$cal.setPreminus(5505);update($cal); endrule "个人所得税：设置税率-->>应纳税所得额在80000以上"salience 2no-loop trueactivation-group "SETCess_Group"when$cal : Calculation(wagemore > 80000)then$cal.setCess(0.45);$cal.setPreminus(13505);update($cal); endrule "个人所得税：计算税后工资"salience 1when$cal : Calculation(wage > 0 && wagemore > 0 && wagemore > 0 && cess > 0)then$cal.setWageminus($cal.getWagemore()*$cal.getCess()-$cal.getPreminus());$cal.setActualwage($cal.getWage()-$cal.getWageminus());System.out.println("-----税前工资："+$cal.getWage());System.out.println("-----应纳税所得额："+$cal.getWagemore());System.out.println("-----税率：" + $cal.getCess());System.out.println("-----速算扣除数：" + $cal.getPreminus());System.out.println("-----扣税额：" + $cal.getWageminus());System.out.println("-----税后工资：" + $cal.getActualwage()); end
使用
@Service public class RuleService {@Autowiredprivate KieBase kieBase;public Calculation calculate(Calculation calculation) {KieSession kieSession = kieBase.newKieSession();kieSession.insert(calculation);kieSession.fireAllRules();kieSession.dispose();return calculation;}}
验证可以使用
