drools整合springboot（十）

Bertha 。 2023-02-16 01:40 23阅读 0赞

1，创建项目drools-springboot

2, 引入依赖 pom依赖

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   <td> <pre>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;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"&gt;
    &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
    &lt;parent&gt;
        &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
        &lt;artifactId&gt;spring-boot-starters&lt;/artifactId&gt;
        &lt;version&gt;2.0.6.RELEASE&lt;/version&gt;
    &lt;/parent&gt;
    &lt;groupId&gt;com.dream21th.drools.study&lt;/groupId&gt;
    &lt;artifactId&gt;drools-springboot&lt;/artifactId&gt;
    &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt;
    &lt;properties&gt;
        &lt;java.version&gt;1.8&lt;/java.version&gt;
    &lt;/properties&gt;
    &lt;dependencies&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
            &lt;artifactId&gt;spring-boot-starter-web&lt;/artifactId&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
            &lt;artifactId&gt;spring-boot-starter-aop&lt;/artifactId&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
            &lt;artifactId&gt;spring-boot-starter-test&lt;/artifactId&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;commons-lang&lt;/groupId&gt;
            &lt;artifactId&gt;commons-lang&lt;/artifactId&gt;
            &lt;version&gt;2.6&lt;/version&gt;
        &lt;/dependency&gt;
        &lt;!--drools规则引擎--&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.drools&lt;/groupId&gt;
            &lt;artifactId&gt;drools-core&lt;/artifactId&gt;
            &lt;version&gt;7.6.0.Final&lt;/version&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.drools&lt;/groupId&gt;
            &lt;artifactId&gt;drools-compiler&lt;/artifactId&gt;
            &lt;version&gt;7.6.0.Final&lt;/version&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.drools&lt;/groupId&gt;
            &lt;artifactId&gt;drools-templates&lt;/artifactId&gt;
            &lt;version&gt;7.6.0.Final&lt;/version&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.kie&lt;/groupId&gt;
            &lt;artifactId&gt;kie-api&lt;/artifactId&gt;
            &lt;version&gt;7.6.0.Final&lt;/version&gt;
        &lt;/dependency&gt;
        &lt;dependency&gt;
            &lt;groupId&gt;org.kie&lt;/groupId&gt;
            &lt;artifactId&gt;kie-spring&lt;/artifactId&gt;
            &lt;exclusions&gt;
                &lt;exclusion&gt;
                    &lt;groupId&gt;org.springframework&lt;/groupId&gt;
                    &lt;artifactId&gt;spring-tx&lt;/artifactId&gt;
                &lt;/exclusion&gt;
                &lt;exclusion&gt;
                    &lt;groupId&gt;org.springframework&lt;/groupId&gt;
                    &lt;artifactId&gt;spring-beans&lt;/artifactId&gt;
                &lt;/exclusion&gt;
                &lt;exclusion&gt;
                    &lt;groupId&gt;org.springframework&lt;/groupId&gt;
                    &lt;artifactId&gt;spring-core&lt;/artifactId&gt;
                &lt;/exclusion&gt;
                &lt;exclusion&gt;
                    &lt;groupId&gt;org.springframework&lt;/groupId&gt;
                    &lt;artifactId&gt;spring-context&lt;/artifactId&gt;
                &lt;/exclusion&gt;
            &lt;/exclusions&gt;
            &lt;version&gt;7.6.0.Final&lt;/version&gt;
        &lt;/dependency&gt;
    &lt;/dependencies&gt;
    &lt;build&gt;
        &lt;finalName&gt;${project.artifactId}&lt;/finalName&gt;
        &lt;resources&gt;
            &lt;resource&gt;
                &lt;directory&gt;src/main/java&lt;/directory&gt;
                &lt;includes&gt;
                    &lt;include&gt;**/*.xml&lt;/include&gt;
                &lt;/includes&gt;
                &lt;filtering&gt;false&lt;/filtering&gt;
            &lt;/resource&gt;
            &lt;resource&gt;
                &lt;directory&gt;src/main/resources&lt;/directory&gt;
                &lt;includes&gt;
                    &lt;include&gt;**/*.*&lt;/include&gt;
                &lt;/includes&gt;
                &lt;filtering&gt;false&lt;/filtering&gt;
            &lt;/resource&gt;
        &lt;/resources&gt;
        &lt;plugins&gt;
            &lt;plugin&gt;
                &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
                &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
                &lt;version&gt;2.3.2&lt;/version&gt;
                &lt;configuration&gt;
                    &lt;source&gt;1.8&lt;/source&gt;
                    &lt;target&gt;1.8&lt;/target&gt;
                &lt;/configuration&gt;
            &lt;/plugin&gt;
        &lt;/plugins&gt;
    &lt;/build&gt;
&lt;/project&gt;</pre> </td> 
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</table>

3，创建配置文件application.yml

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   <td> <pre>server:
  port: 8080
spring:
  application:
    name: drools_springboot</pre> </td> 
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</table>

4,创建DroolConfig.java

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   <td> <pre>package com.dream.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();
    }
}</pre> </td> 
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</table>

5,创建RuleService.java

<table> 
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  <tr> 
   <td> <pre>package com.dream.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();
    }
}</pre> </td> 
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</table>

6,创建HelloController

<table> 
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  <tr> 
   <td> <pre>package com.dream.drools.controller;

import com.dream.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";
    }
}
</pre> </td> 
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</table>

7，创建启动类

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  <tr> 
   <td> <pre>package com.dream.drools;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/*
 * @Author dream21th
 **/

@SpringBootApplication
public class DroolsApplication {
    public static void main(String[] args) {
        SpringApplication.run(DroolsApplication.class,args);
    }
}
</pre> </td> 
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</table>

8，创建规则文件

<table> 
 <tbody> 
  <tr> 
   <td> <pre>package helloworld
rule "rule_helloworld"
    when
        eval(true)
    then
        System.out.println("规则：rule_helloworld触发...");
end
</pre> </td> 
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</table>

9，启动应用，并在浏览器中输入[http://localhost:8080/hello/rule][http_localhost_8080_hello_rule]

控制台可以观察到规则输出

代码地址： [https://gitee.com/dream21th/drools-study/tree/master/drools-springboot][https_gitee.com_dream21th_drools-study_tree_master_drools-springboot]

[http_localhost_8080_hello_rule]: http://localhost:8080/hello/rule
[https_gitee.com_dream21th_drools-study_tree_master_drools-springboot]: https://gitee.com/dream21th/drools-study/tree/master/drools-springboot