电子表格表格的决定会被否决吗

Question

我尝试使用excel格式(*.xlsx(的表格决策，这是一种电子表格。我不想把我的电子表格放在我的应用程序的文件夹资源中。所以我创建了一个文件夹：folder/Discount.xls.

但当我运行我的程序时，它会抛出一个File not found异常。如果电子表格文件不在资源文件夹中，它似乎无法加载，所以在jar中。

我想知道我是否可以在发布时制作一个程序，因为我的规则可以动态加载？我会选择一个或另一个电子表格来对我的规则进行热更改。但我不知道这是否可能。

我有一些代码：

KieServices kieServices = KieServices.Factory.get();
File file = new File("folder/Discount.xls");
Resource resource = ResourceFactory.newFileResource(file);
KieFileSystem kieFileSystem = kieServices.newKieFileSystem().write(resource);
KieBuilder kieBuilder = kieServices.newKieBuilder(kieFileSystem);
kieBuilder.buildAll();
KieRepository kieRepository = kieServices.getRepository();
ReleaseId krDefaultReleaseId = kieRepository.getDefaultReleaseId();
KieContainer kieContainer = kieServices.newKieContainer(krDefaultReleaseId);
KieSession kieSession = kieContainer.newKieSession();

前一段代码引发运行时异常：

Exception in thread "main" java.lang.RuntimeException: Cannot find KieModule: org.default:artifact:1.0.0

Answer 1

我找到了问题的解决方案。电子表格可以在java资源文件夹之外的其他文件夹中。我的课堂测试如下：

public class Main {
private static InternalKnowledgeBase createKnowledgeBaseFromSpreadsheet() throws Exception {
DecisionTableConfiguration decisionTableConfiguration = KnowledgeBuilderFactory.newDecisionTableConfiguration();
decisionTableConfiguration.setInputType(DecisionTableInputType.XLS);
KnowledgeBuilder knowledgeBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
File file = new File("folder/Discount.xls");
Resource resourceFile = ResourceFactory.newFileResource(file);
knowledgeBuilder.add(resourceFile, ResourceType.DTABLE, decisionTableConfiguration);
if (knowledgeBuilder.hasErrors()) {
throw new RuntimeException(knowledgeBuilder.getErrors().toString());
}
InternalKnowledgeBase internalKnowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
Collection<KiePackage> kiePackages = knowledgeBuilder.getKnowledgePackages();
internalKnowledgeBase.addPackages(kiePackages);
return internalKnowledgeBase;
}
public static void main(String[] args) {
(new Main()).run();
}
public void run() {
System.out.println("--- Start Code ---");
StatelessKieSession session = null;
try {
InternalKnowledgeBase knowledgeBase = createKnowledgeBaseFromSpreadsheet();
session = knowledgeBase.newStatelessKieSession();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Customer customer = new Customer(CustomerType.INDIVIDUAL, 1);
System.out.println(customer.toString());
session.execute(customer);
System.out.println(customer.toString());
System.out.println("--- End Code ---");
}
}

我的客户类(必须添加getter、setter并覆盖toString方法(：

public class Customer {
public enum CustomerType {
INDIVIDUAL, BUSINESS;
}
private CustomerType type;
private int years;
private int discount;
public Customer(CustomerType individual, int years) {
this.type = individual;
this.years = years;
}
}

我的*.pom文件包含：

<dependencies>
<dependency>
<groupId>org.kie</groupId>
<artifactId>kie-ci</artifactId>
<version>7.28.0.Final</version>
</dependency>
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-decisiontables</artifactId>
<version>7.28.0.Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>
<scope>runtime</scope>
</dependency>