在Java中使用Drools進(jìn)行決策表管理的實(shí)現(xiàn)方法如下:
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>7.46.0.Final</version>
</dependency>
package com.example.rules
rule "Example Rule"
when
// 規(guī)則條件
then
// 規(guī)則動(dòng)作
end
KieServices kieServices = KieServices.Factory.get();
KieFileSystem kfs = kieServices.newKieFileSystem();
// 加載DRL文件
FileInputStream fis = new FileInputStream("src/main/resources/com/example/rules/exampleRule.drl");
kfs.write("src/main/resources/com/example/rules/exampleRule.drl", kieServices.getResources().newInputStreamResource(fis));
KieBuilder kieBuilder = kieServices.newKieBuilder(kfs).buildAll();
KieContainer kieContainer = kieServices.newKieContainer(kieServices.getRepository().getDefaultReleaseId());
KieSession kieSession = kieContainer.newKieSession();
// 插入事實(shí)對象
FactType factType = kieSession.getKieBase().getFactType("com.example.rules", "FactType");
Object fact = factType.newInstance();
factType.set(fact, "field", value);
kieSession.insert(fact);
// 執(zhí)行規(guī)則
kieSession.fireAllRules();
通過以上步驟,就可以在Java中使用Drools進(jìn)行決策表管理??梢愿鶕?jù)具體的業(yè)務(wù)需求編寫規(guī)則規(guī)則,并在Java代碼中加載和執(zhí)行規(guī)則。