Spring整合drools

1 Spring简单整合Drools

在项目中使用Drools时往往会跟Spring整合来使用。具体整合步骤如下：

第一步：创建maven工程drools_spring并配置pom.xml

         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    4.0.0
    com.itheima
    drools_spring
    1.0-SNAPSHOT
    
        7.10.0.Final
        5.0.5.RELEASE
    
    
        
            org.drools
            drools-compiler
            ${drools.version}
        
        
            junit
            junit
            4.12
        
        
            org.kie
            kie-spring
            ${drools.version}
            
            
                
                    org.springframework
                    spring-tx
                
                
                    org.springframework
                    spring-beans
                
                
                    org.springframework
                    spring-core
                
                
                    org.springframework
                    spring-context
                
            
        
        
            org.springframework
            spring-context
            ${spring.version}
        
        
            org.springframework
            spring-context-support
            ${spring.version}
        
        
            org.springframework
            spring-test
            ${spring.version}
        
        
            org.springframework
            spring-tx
            ${spring.version}
        
    

第二步：创建规则目录/resources/rules，中rules目录中创建规则文件helloworld.drl

package helloworld

rule "rule_helloworld"
    when
        eval(true)
    then
        System.out.println("规则：rule_helloworld触发...");
end

第三步：创建Spring配置文件/resources/spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:kie="http://drools.org/schema/kie-spring"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                            http://www.springframework.org/schema/beans/spring-beans.xsd
                            http://drools.org/schema/kie-spring
                            http://drools.org/schema/kie-spring.xsd">
    <kie:kmodule id="kmodule">
        <kie:kbase name="kbase" packages="rules">
            <kie:ksession name="ksession">kie:ksession>
        kie:kbase>
    kie:kmodule>
    <bean class="org.kie.spring.annotations.KModuleAnnotationPostProcessor">bean>
beans>

第四步：编写单元测试类

package com.itheima.test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.kie.api.KieBase;
import org.kie.api.cdi.KBase;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:spring.xml")
public class DroolsSpringTest {
    @KBase("kbase")
    private KieBase kieBase;//注入KieBase对象
    @Test
    public void test1(){
        KieSession kieSession = kieBase.newKieSession();
        kieSession.fireAllRules();
        kieSession.dispose();
    }
}

2 Spring整合Drools+web

本小节我们来进行Drools和Spring Web的整合。具体操作步骤如下：

第一步：创建maven的war工程drools_springweb并在pom.xml文件中导入相关maven坐标

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0modelVersion>
  <groupId>com.itheimagroupId>
  <artifactId>drools_springwebartifactId>
  <version>1.0-SNAPSHOTversion>
  <packaging>warpackaging>
  <properties>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <maven.compiler.source>1.8maven.compiler.source>
    <maven.compiler.target>1.8maven.compiler.target>
    <drools.version>7.10.0.Finaldrools.version>
    <spring.version>5.0.5.RELEASEspring.version>
  properties>
  <dependencies>
    <dependency>
      <groupId>org.droolsgroupId>
      <artifactId>drools-compilerartifactId>
      <version>${drools.version}version>
    dependency>
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.12version>
    dependency>
    <dependency>
      <groupId>org.kiegroupId>
      <artifactId>kie-springartifactId>
      <version>${drools.version}version>
      <!--注意：此处必须排除传递过来的依赖，否则会跟我们自己导入的Spring jar包产生冲突-->
      <exclusions>
        <exclusion>
          <groupId>org.springframeworkgroupId>
          <artifactId>spring-txartifactId>
        exclusion>
        <exclusion>
          <groupId>org.springframeworkgroupId>
          <artifactId>spring-beansartifactId>
        exclusion>
        <exclusion>
          <groupId>org.springframeworkgroupId>
          <artifactId>spring-coreartifactId>
        exclusion>
        <exclusion>
          <groupId>org.springframeworkgroupId>
          <artifactId>spring-contextartifactId>
        exclusion>
      exclusions>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-contextartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-context-supportartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-testartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-txartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webartifactId>
      <version>${spring.version}version>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webmvcartifactId>
      <version>${spring.version}version>
    dependency>
  dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.tomcat.mavengroupId>
        <artifactId>tomcat7-maven-pluginartifactId>
        <configuration>
          <!-- 指定端口 -->
          <port>80port>
          <!-- 请求路径 -->
          <path>/path>
        configuration>
      plugin>
    plugins>
  build>
project>

第二步：配置web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
  <display-name>Archetype Created Web Applicationdisplay-name>
  <servlet>
    <servlet-name>springmvcservlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    <!-- 指定加载的配置文件 ，通过参数contextConfigLocation加载 -->
    <init-param>
      <param-name>contextConfigLocationparam-name>
      <param-value>classpath:springmvc.xmlparam-value>
    init-param>
    <load-on-startup>1load-on-startup>
  servlet>
  <servlet-mapping>
    <servlet-name>springmvcservlet-name>
    <url-pattern>*.dourl-pattern>
  servlet-mapping>
web-app>

第三步：创建/resources/springmvc.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:kie="http://drools.org/schema/kie-spring"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://drools.org/schema/kie-spring
       http://drools.org/schema/kie-spring.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <kie:kmodule id="kmodule">
        <kie:kbase name="kbase" packages="rules">
            <kie:ksession name="ksession">kie:ksession>
        kie:kbase>
    kie:kmodule>

    <bean class="org.kie.spring.annotations.KModuleAnnotationPostProcessor"/>

    <!--spring批量扫描-->
    <context:component-scan base-package="com.itheima" />
    <context:annotation-config/>
    <!--springMVC注解驱动-->
    <mvc:annotation-driven/>
beans>

第四步：创建规则文件/resources/rules/helloworld.drl

package helloworld

rule "rule_helloworld"
    when
        eval(true)
    then
        System.out.println("规则：rule_helloworld触发...");
end

第五步：创建RuleService

package com.itheima.service;

import org.kie.api.KieBase;
import org.kie.api.cdi.KBase;
import org.kie.api.runtime.KieSession;
import org.springframework.stereotype.Service;

@Service
public class RuleService {
    @KBase("kbase")
    private KieBase kieBase;
    public void rule(){
        KieSession kieSession = kieBase.newKieSession();
        kieSession.fireAllRules();
        kieSession.dispose();
    }
}

第六步：创建HelloController

package com.itheima.controller;

import com.itheima.service.RuleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/hello")
public class HelloController {
    @Autowired
    private RuleService ruleService;
    @RequestMapping("/rule")
    public String rule(){
        ruleService.rule();
        return "OK";
    }
}

3 Spring Boot整合Drools

目前在企业开发中Spring Boot已经成为主流，本小节我们来进行Spring Boot整合Drools。具体操作步骤：

第一步：创建maven工程drools_springboot并配置pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-startersartifactId>
        <version>2.0.6.RELEASEversion>
    parent>
    <modelVersion>4.0.0modelVersion>
    <groupId>com.itheimagroupId>
    <artifactId>drools_springbootartifactId>
    <version>1.0-SNAPSHOTversion>
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-aopartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
        dependency>
        <dependency>
            <groupId>commons-langgroupId>
            <artifactId>commons-langartifactId>
            <version>2.6version>
        dependency>
        <!--drools规则引擎-->
        <dependency>
            <groupId>org.droolsgroupId>
            <artifactId>drools-coreartifactId>
            <version>7.6.0.Finalversion>
        dependency>
        <dependency>
            <groupId>org.droolsgroupId>
            <artifactId>drools-compilerartifactId>
            <version>7.6.0.Finalversion>
        dependency>
        <dependency>
            <groupId>org.droolsgroupId>
            <artifactId>drools-templatesartifactId>
            <version>7.6.0.Finalversion>
        dependency>
        <dependency>
            <groupId>org.kiegroupId>
            <artifactId>kie-apiartifactId>
            <version>7.6.0.Finalversion>
        dependency>
        <dependency>
            <groupId>org.kiegroupId>
            <artifactId>kie-springartifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframeworkgroupId>
                    <artifactId>spring-txartifactId>
                exclusion>
                <exclusion>
                    <groupId>org.springframeworkgroupId>
                    <artifactId>spring-beansartifactId>
                exclusion>
                <exclusion>
                    <groupId>org.springframeworkgroupId>
                    <artifactId>spring-coreartifactId>
                exclusion>
                <exclusion>
                    <groupId>org.springframeworkgroupId>
                    <artifactId>spring-contextartifactId>
                exclusion>
            exclusions>
            <version>7.6.0.Finalversion>
        dependency>
    dependencies>
    <build>
        <finalName>${project.artifactId}finalName>
        <resources>
            <resource>
                <directory>src/main/javadirectory>
                <includes>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
            <resource>
                <directory>src/main/resourcesdirectory>
                <includes>
                    <include>**/*.*include>
                includes>
                <filtering>falsefiltering>
            resource>
        resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <version>2.3.2version>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                configuration>
            plugin>
        plugins>
    build>
project>

第二步：创建/resources/application.yml文件

server:
  port: 8080
spring:
  application:
    name: drools_springboot

第三步：创建规则文件/resources/rules/helloworld.drl

package helloworld
rule "rule_helloworld"
    when
        eval(true)
    then
        System.out.println("规则：rule_helloworld触发...");
end

第四步：编写配置类DroolsConfig

package com.itheima.drools.config;
import org.kie.api.KieBase;
import org.kie.api.KieServices;
import org.kie.api.builder.KieBuilder;
import org.kie.api.builder.KieFileSystem;
import org.kie.api.builder.KieRepository;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.internal.io.ResourceFactory;
import org.kie.spring.KModuleBeanFactoryPostProcessor;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.core.io.Resource;
import java.io.IOException;
/**
 * 规则引擎配置类
 */
@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 {
        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();
    }
    @Bean
    @ConditionalOnMissingBean
    public KModuleBeanFactoryPostProcessor kiePostProcessor() {
        return new KModuleBeanFactoryPostProcessor();
    }
}

第五步：创建RuleService类

package com.itheima.drools.service;

import org.kie.api.KieBase;
import org.kie.api.runtime.KieSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class RuleService {
    @Autowired
    private KieBase kieBase;
    public void rule(){
        KieSession kieSession = kieBase.newKieSession();
        kieSession.fireAllRules();
        kieSession.dispose();
    }
}

第六步：创建HelloController类

package com.itheima.drools.controller;

import com.itheima.drools.service.RuleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/hello")
public class HelloController {
    @Autowired
    private RuleService ruleService;
    @RequestMapping("/rule")
    public String rule(){
        ruleService.rule();
        return "OK";
    }
}

第七步：创建启动类DroolsApplication

package com.itheima.drools;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DroolsApplication {
    public static void main(String[] args) {
        SpringApplication.run(DroolsApplication.class,args);
    }
}

第八步：启动服务，访问http://localhost:8080/hello/rule