org.drools.RuntimeDroolsException：包名无效

Question

我是JBPM的新人。

我创建了带有start，diverge和两个脚本以及融合和结束任务的bpmn文件。

我的代码是

package com.sample;

import java.util.HashMap;
import java.util.Map;

import org.drools.KnowledgeBase;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.process.ProcessInstance;


 public class ProcessTest {

public static void main(String[] args){

    KnowledgeBuilder kbuilder =      KnowledgeBuilderFactory.newKnowledgeBuilder();

    kbuilder.add( ResourceFactory.newClassPathResource("sample.bpmn"),

                  ResourceType.BPMN2 );
    KnowledgeBase kbase = kbuilder.newKnowledgeBase();

    StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

    Map<String,Object> params=new HashMap<String,Object>();

    params.put("income", 1200);


    ProcessInstance processInstance = ksession.startProcess("com.sample.bpmn.hello",params);
}

}

但是我收到以下错误

org.drools.RuntimeDroolsException: invalid package name
at org.jbpm.compiler.ProcessBuilderImpl.buildProcess(ProcessBuilderImpl.java:175)
at org.jbpm.compiler.ProcessBuilderImpl.addProcessFromXml(ProcessBuilderImpl.java:254)
at org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:564)
at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:608)
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:37)
at com.sample.ProcessTest.main(ProcessTest.java:23)
  [6,13]: [ERR 102] Line 6:13 mismatched input 'income' in rule "RuleFlow-    Split-com.sample.bpmn.hello-2-3-DROOLS_DEFAULT"
  [13,13]: [ERR 102] Line 13:13 mismatched input 'income' in rule "RuleFlow-  Split-com.sample.bpmn.hello-2-4-DROOLS_DEFAULT"
  [0,0]: Parser returned a null Package
ProcessLoadError: unable to parse xml : Exception class    org.drools.RuntimeDroolsException : invalid package name
Exception in thread "main" java.lang.IllegalArgumentException: Could not    parse knowledge.
    at    org.drools.builder.impl.KnowledgeBuilderImpl.newKnowledgeBase(KnowledgeBuilde    rImpl.java:67)
  at com.sample.ProcessTest.main(ProcessTest.java:26)

我在sample.bpmn

中给出了包名com.sample

我的sample.bpmn文件是