SpringBoot集成Drools

版本

SpringBoot 3.2.0

JDK 17

Drools 9.44.0.Final

pom.xml 相关依赖

    org.springframework.boot
    spring-boot-starter-parent
    3.2.0
     

    17
    9.44.0.Final

    
        org.springframework.boot
        spring-boot-starter-web
    

    
        org.springframework.boot
        spring-boot-starter-aop
    

    
        org.springframework.boot
        spring-boot-starter-test
        test
    

    
        commons-lang
        commons-lang
        2.6
    

    
    
        org.drools
        drools-core
        ${drools-version}
    
    
        org.drools
        drools-compiler
        ${drools-version}
    
    
        org.drools
        drools-templates
        ${drools-version}
    
    
        org.kie
        kie-api
        ${drools-version}
    

    
        org.drools
        drools-decisiontables
        ${drools-version}
    

    
        org.drools
        drools-xml-support
        ${drools-version}
    

    
        org.kie
        kie-ci
        ${drools-version}
    

    
    
        org.projectlombok
        lombok
        true
    

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
    @ConditionalOnMissingBean
    public 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
    @ConditionalOnMissingBean
    public 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
    @ConditionalOnMissingBean
    public 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.Calculation

rule "个人所得税：计算应纳税所得额"
    enabled true
    salience 3
    no-loop true
    date-effective "2011-09-01" //生效日期
    when
        $cal : Calculation(wage>0)
    then
        $cal.setWagemore($cal.getWage()-3500);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额<=1500"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore <= 1500)
    then
        $cal.setCess(0.03);
        $cal.setPreminus(0);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额在1500至4500之间"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore > 1500 && wagemore <= 4500)
    then
        $cal.setCess(0.1);
        $cal.setPreminus(105);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额在4500志9000之间"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore > 4500 && wagemore <= 9000)
    then
        $cal.setCess(0.2);
        $cal.setPreminus(555);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额在9000志35000之间"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore > 9000 && wagemore <= 35000)
    then
        $cal.setCess(0.25);
        $cal.setPreminus(1005);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额在35000至55000之间"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore > 35000 && wagemore <= 55000)
    then
        $cal.setCess(0.3);
        $cal.setPreminus(2755);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额在55000至80000之间"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore > 55000 && wagemore <= 80000)
    then
        $cal.setCess(0.35);
        $cal.setPreminus(5505);
        update($cal);
end

rule "个人所得税：设置税率-->>应纳税所得额在80000以上"
    salience 2
    no-loop true
    activation-group "SETCess_Group"
    when
        $cal : Calculation(wagemore > 80000)
    then
        $cal.setCess(0.45);
        $cal.setPreminus(13505);
        update($cal);
end

rule "个人所得税：计算税后工资"
    salience 1
    when
        $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 {
    @Autowired
    private 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