Drools有什么用
从我个人所待过的公司，其中做智能酒店这个项目时就用到规则引擎Drools，将它用于处理优惠劵规则。
SpringBoot整合Drools初步实战
1.导入Maven依赖
<properties>
<drools.version>7.14.0.Final</drools.version>
</properties>
<!-- drools -->
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-compiler</artifactId>
<version>${drools.version}</version>
</dependency>2.编写配置类
package com.springcloud.blog.admin.config;
import org.kie.api.KieBase;
import org.kie.api.KieServices;
import org.kie.api.builder.*;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;
import org.kie.internal.io.ResourceFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import java.io.IOException;
@Configuration
public class KiaSessionConfig {
private static final String RULES_PATH = "rules/";
@Bean
public KieFileSystem kieFileSystem() throws IOException {
KieFileSystem kieFileSystem = getKieServices().newKieFileSystem();
for (Resource file : getRuleFiles()) {
kieFileSystem.write(ResourceFactory.newClassPathResource(RULES_PATH + file.getFilename(), "UTF-8"));
}
return kieFileSystem;
}
private Resource[] getRuleFiles() throws IOException {
ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();
final Resource[] resources = resourcePatternResolver.getResources("classpath*:" + RULES_PATH + "**/*.*");
return resources;
}
@Bean
public KieContainer kieContainer() throws IOException {
final KieRepository kieRepository = getKieServices().getRepository();
kieRepository.addKieModule(new KieModule() {
public ReleaseId getReleaseId() {
return kieRepository.getDefaultReleaseId();
}
});
KieBuilder kieBuilder = getKieServices().newKieBuilder(kieFileSystem());
kieBuilder.buildAll();
return getKieServices().newKieContainer(kieRepository.getDefaultReleaseId());
}
private KieServices getKieServices() {
return KieServices.Factory.get();
}
@Bean
public KieBase kieBase() throws IOException {
return kieContainer().getKieBase();
}
@Bean
public KieSession kieSession() throws IOException {
return kieContainer().newKieSession();
}
}3.resources目录新建rules目录
4.新建实体
package com.springcloud.blog.admin.drools;
public class People {
private int sex;
private String name;
private String drlType;
public int getSex() {
return sex;
}
public void setSex(int sex) {
this.sex = sex;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDrlType() {
return drlType;
}
public void setDrlType(String drlType) {
this.drlType = drlType;
}
}5.编写规则文件
package com.springcloud.blog.admin.drools
import com.springcloud.blog.admin.drools.People
dialect "java"
rule "man"
when
$p : People(sex == 1 && drlType == "people")
then
System.out.println($p.getName() + "是男孩");
end6.单元测试(只要正常输出，表示整合是Ok的，接下来就可以任意应用了)
package com.springcloud.blog.base.controller.test.task;
import com.springcloud.blog.admin.BlogAdminApplication;
import com.springcloud.blog.admin.drools.People;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.kie.api.KieBase;
import org.kie.api.runtime.KieSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = BlogAdminApplication.class, webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class DroolsJunitTest {
@Autowired
private KieSession session;
@Test
public void people() {
People people = new People();
people.setName("YC");
people.setSex(1);
people.setDrlType("people");
session.insert(people);//插入
session.fireAllRules();//执行规则
}
}7.输出结果
YC是男孩
以上就是SpringBoot整合Drools的实现步骤的详细内容，更多关于SpringBoot整合Drools的资料请关注编程网其它相关文章！
