我是Jbpm的新手，我目前正在建立一个贷款申请，我有一个有贷款金额的人员类。
我使用Map in Process传递Person对象作为参数，如下所示：
KnowledgeBuilder kBuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kBuilder.add(ResourceFactory.newClassPathResource("bpmn/sampleProcess.bpmn"),ResourceType.BPMN2 );
KieBase kBase = kBuilder.newKnowledgeBase();
KieSession kSession = kBase.newKieSession();
// PROCESS PARAMETERS ::: Process Level Variables with Process Scope
Map<String,Object> params = new HashMap<>();
//Creating a Person who applies to loan.
Person p = new Person();
p.setName("Ayushya K Devmurari");
p.setUniqueId("A007");
p.setLoanAmmount(5_00_000.00);
p.setIncome(2_40_000.00);
// setting parameter in Map
params.put("Applicant1", p);
//Starting the process.
kSession.startProcess("com.discusit.loanapplication", params);
kSession.dispose();
以下是我的流程图的链接：
http://tinypic.com/view.php?pic=2pza22o&s=5
我可以在启动脚本中访问person对象，代码如下：
System.out.println("Person is :::"+kcontext.getVariable("Applicant1"));
问题是每当我尝试调用此对象上的任何方法/尝试将其强制转换为Person时，它会抛出错误，如下所示：
Exception in thread "main" java.lang.IllegalArgumentException: Could not parse knowledge.
at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.newKnowledgeBase(KnowledgeBuilderImpl.java:79)
at com.discusit.loanapplication.main.MainClass.main(MainClass.java:23)
这是我的.bpmn文件：
<?xml version="1.0" encoding="UTF-8"?>
<definitions id="Definition"
targetNamespace="http://www.jboss.org/drools"
typeLanguage="http://www.java.com/javaTypes"
expressionLanguage="http://www.mvel.org/2.0"
xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"
xmlns:g="http://www.jboss.org/drools/flow/gpd"
xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
xmlns:tns="http://www.jboss.org/drools">
<itemDefinition id="_personItem" structureRef="Person" />
<itemDefinition id="_amountItem" structureRef="Float" />
<process processType="Private" isExecutable="true" id="com.discusit.loanapplication" name="Sample Process" tns:packageName="defaultPackage" >
<!-- process variables -->
<property id="person" itemSubjectRef="_personItem"/>
<property id="amount" itemSubjectRef="_amountItem"/>
<!-- nodes -->
<startEvent id="_1" isInterrupting="true"/>
<endEvent id="_16" name="End" >
<terminateEventDefinition />
</endEvent>
<exclusiveGateway id="_3" name="Gateway" gatewayDirection="Diverging" />
<scriptTask id="_18" name="Starting" scriptFormat="http://www.java.com/java" >
<script>System.out.println("Process initialization...");
System.out.println("Person Object "+kcontext.getVariable("Applicant1"));
</script>
</scriptTask>
<scriptTask id="_4" name="Low Amount" scriptFormat="http://www.java.com/java" >
<script>
System.out.println("Amount is Low :::::::");
</script>
</scriptTask>
<scriptTask id="_5" name="Medium Amount" scriptFormat="http://www.java.com/java" >
<script>System.out.println("Amount is medium :::::");
</script>
</scriptTask>
<scriptTask id="_6" name="High Amount" scriptFormat="http://www.java.com/java" >
<script>System.out.println("Amount is HIGH :::::::::");</script>
</scriptTask>
<parallelGateway id="_22" name="Gateway" gatewayDirection="Converging" />
<!-- connections -->
<sequenceFlow id="_22-_16" sourceRef="_22" targetRef="_16" />
<sequenceFlow id="_18-_3" sourceRef="_18" targetRef="_3" />
<sequenceFlow id="_1-_18" sourceRef="_1" targetRef="_18" />
<sequenceFlow id="_3-_4" sourceRef="_3" targetRef="_4" name="low" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.java.com/java" >return false;</conditionExpression>
</sequenceFlow>
<sequenceFlow id="_3-_5" sourceRef="_3" targetRef="_5" name="medium" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.java.com/java" >return false;</conditionExpression>
</sequenceFlow>
<sequenceFlow id="_3-_6" sourceRef="_3" targetRef="_6" name="high" tns:priority="1" >
<conditionExpression xsi:type="tFormalExpression" language="http://www.java.com/java" >return true;</conditionExpression>
</sequenceFlow>
<sequenceFlow id="_5-_22" sourceRef="_5" targetRef="_22" />
<sequenceFlow id="_6-_22" sourceRef="_6" targetRef="_22" />
<sequenceFlow id="_4-_22" sourceRef="_4" targetRef="_22" />
</process>
<bpmndi:BPMNDiagram>
<bpmndi:BPMNPlane bpmnElement="com.discusit.loanapplication" >
<bpmndi:BPMNShape bpmnElement="_1" >
<dc:Bounds x="265" y="57" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_16" >
<dc:Bounds x="265" y="558" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_3" >
<dc:Bounds x="263" y="223" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_18" >
<dc:Bounds x="248" y="134" width="80" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_4" >
<dc:Bounds x="21" y="356" width="132" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_5" >
<dc:Bounds x="217" y="355" width="142" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_6" >
<dc:Bounds x="475" y="346" width="132" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="_22" >
<dc:Bounds x="264" y="462" width="48" height="48" />
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="_22-_16" >
<di:waypoint x="288" y="486" />
<di:waypoint x="289" y="582" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_18-_3" >
<di:waypoint x="288" y="158" />
<di:waypoint x="287" y="247" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_1-_18" >
<di:waypoint x="289" y="81" />
<di:waypoint x="288" y="158" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_3-_4" >
<di:waypoint x="287" y="247" />
<di:waypoint x="87" y="380" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_3-_5" >
<di:waypoint x="287" y="247" />
<di:waypoint x="288" y="379" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_3-_6" >
<di:waypoint x="287" y="247" />
<di:waypoint x="541" y="370" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_5-_22" >
<di:waypoint x="288" y="379" />
<di:waypoint x="288" y="486" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_6-_22" >
<di:waypoint x="541" y="370" />
<di:waypoint x="288" y="486" />
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="_4-_22" >
<di:waypoint x="87" y="380" />
<di:waypoint x="288" y="486" />
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
我想要做的是访问“分叉网关”上Person对象内的loanAmount，以对贷款类型进行分类。谁能帮我？在我出错的地方，我找不到它。谢谢。
答案 0 :(得分：1)
理论上，您应该能够看到有关编译过程中出现问题的更多信息（在控制台或早期的堆栈跟踪中）。如果没有，请使用kbuilder.getErrors（）获取更多详细信息。
快速浏览一下这个过程让我想知道你是不是应该为你的Person类等使用完全限定的名字（包括包）？
克里斯
答案 1 :(得分：0)
这：线程“main”中的异常java.lang.IllegalArgumentException：无法解析知识。 at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.newKnowledgeBase（KnowledgeBuilderImpl.java:79）
意味着你的过程中的某些东西是错误的，但你没有分享完整的堆栈跟踪，所以我们帮助你更复杂..如果仔细查看堆栈跟踪，你会发现那里发生了什么。
干杯