activiti学习之设置条件表达式

比眉伴天荒 2022-09-15 11:56 415阅读 0赞

## 1：场景分析 ##

可能存在这样的场景，当一个任务节点处理时，录入了不同的信息，需要流转到不同的任务节点，假设请假如果是同意的话则继续流转到下一个审批人，如果是拒绝的话则直接结束。

## 2：测试 ##

### 2.1：流程设计 ###

*  效果图

![在这里插入图片描述][8d7127eecf104a1a836ef33ee08a6bfb.png]

注意设置了`同意`的流向作为默认的流向，即当条件都不满足是使用该流向。

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_18_color_FFFFFF_t_70_g_se_x_16]

对应的xml信息如下：

<userTask id="usertask1" name="第一个请假审批" default="agreeFlowId" activiti:assignee="小赵">
        <extensionElements>
            <modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">false</modeler:initiator-can-complete>
        </extensionElements>
    </userTask>

注意其中的`default="agreeFlowId"`。

*  xml

<?xml version="1.0" encoding="UTF-8"?>
    <definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
        <process id="csdnUseConditionExpression.bpmn" name="csdnUseConditionExpression.bpmn" isExecutable="true">
            <startEvent id="startevent1" name="Start"></startEvent>
            <userTask id="usertask1" name="第一个请假审批" default="agreeFlowId" activiti:assignee="小赵">
                <extensionElements>
                    <modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">false</modeler:initiator-can-complete>
                </extensionElements>
            </userTask>
            <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
            <userTask id="usertask2" name="第二个请假审批" activiti:assignee="小马">
                <extensionElements>
                    <modeler:initiator-can-complete xmlns:modeler="http://activiti.com/modeler">false</modeler:initiator-can-complete>
                </extensionElements>
            </userTask>
            <sequenceFlow id="agreeFlowId" name="同意" sourceRef="usertask1" targetRef="usertask2">
                <conditionExpression xsi:type="tFormalExpression"><![CDATA[${msg=='同意'}]]></conditionExpression>
            </sequenceFlow>
            <endEvent id="endevent1" name="End"></endEvent>
            <sequenceFlow id="resuseFlowId" name="拒绝" sourceRef="usertask1" targetRef="endevent1">
                <conditionExpression xsi:type="tFormalExpression"><![CDATA[${msg=='拒绝'}]]></conditionExpression>
            </sequenceFlow>
            <sequenceFlow id="flow6" sourceRef="usertask2" targetRef="endevent1"></sequenceFlow>
        </process>
        <bpmndi:BPMNDiagram id="BPMNDiagram_csdnUseConditionExpression.bpmn">
            <bpmndi:BPMNPlane bpmnElement="csdnUseConditionExpression.bpmn" id="BPMNPlane_csdnUseConditionExpression.bpmn">
                <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
                    <omgdc:Bounds height="35.0" width="35.0" x="190.0" y="270.0"></omgdc:Bounds>
                </bpmndi:BPMNShape>
                <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
                    <omgdc:Bounds height="55.0" width="105.0" x="400.0" y="260.0"></omgdc:Bounds>
                </bpmndi:BPMNShape>
                <bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2">
                    <omgdc:Bounds height="55.0" width="105.0" x="710.0" y="190.0"></omgdc:Bounds>
                </bpmndi:BPMNShape>
                <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
                    <omgdc:Bounds height="35.0" width="35.0" x="745.0" y="340.0"></omgdc:Bounds>
                </bpmndi:BPMNShape>
                <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
                    <omgdi:waypoint x="225.0" y="287.0"></omgdi:waypoint>
                    <omgdi:waypoint x="400.0" y="287.0"></omgdi:waypoint>
                </bpmndi:BPMNEdge>
                <bpmndi:BPMNEdge bpmnElement="agreeFlowId" id="BPMNEdge_agreeFlowId">
                    <omgdi:waypoint x="452.0" y="260.0"></omgdi:waypoint>
                    <omgdi:waypoint x="762.0" y="245.0"></omgdi:waypoint>
                    <bpmndi:BPMNLabel>
                        <omgdc:Bounds height="14.0" width="100.0" x="497.0" y="229.0"></omgdc:Bounds>
                    </bpmndi:BPMNLabel>
                </bpmndi:BPMNEdge>
                <bpmndi:BPMNEdge bpmnElement="resuseFlowId" id="BPMNEdge_resuseFlowId">
                    <omgdi:waypoint x="452.0" y="315.0"></omgdi:waypoint>
                    <omgdi:waypoint x="762.0" y="340.0"></omgdi:waypoint>
                    <bpmndi:BPMNLabel>
                        <omgdc:Bounds height="14.0" width="100.0" x="537.0" y="343.0"></omgdc:Bounds>
                    </bpmndi:BPMNLabel>
                </bpmndi:BPMNEdge>
                <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
                    <omgdi:waypoint x="762.0" y="245.0"></omgdi:waypoint>
                    <omgdi:waypoint x="762.0" y="340.0"></omgdi:waypoint>
                </bpmndi:BPMNEdge>
            </bpmndi:BPMNPlane>
        </bpmndi:BPMNDiagram>
    </definitions>

### 2.2：部署 ###

/** * 部署流程定义 */
    @Test
    public void deploy() { 
        Deployment deployment = repositoryService.createDeployment() // 创建部署
                .addClasspathResource("com/jh/activiti/csdnUseConditionExpression.bpmn20.xml") // 加载流程资源文件
                .name("csdn测试使用条件表达式") // 流程名称
                .deploy(); // 部署
        System.out.println("流程部署ID:" + deployment.getId());
        System.out.println("流程部署Name:" + deployment.getName());
    }

![在这里插入图片描述][e13ef95a06024f749e56a1b40dc09bf2.png]

![在这里插入图片描述][be73ae386e91456ea78e6289d88c1343.png]

### 2.3：启动流程实例 ###

// 启动流程实例
    @Test
    public void startInstance() { 
        runtimeService.startProcessInstanceByKey("csdnUseConditionExpression.bpmn");
    }

![在这里插入图片描述][f353604592014e38be288670f585798a.png]

![在这里插入图片描述][fe2e590ebc7747babaf945e9afcf33e6.png]

### 2.4：完成任务并满足resuseFlowId ###

此时程序直接结束。

@Test
    public void complete() { 
        Map<String, Object> variablesMap = new HashMap<>();
        variablesMap.put("msg", "拒绝");
        taskService.complete("817506", variablesMap);
    }

![在这里插入图片描述][c216e2dc43e5419290d50847b0af4b9d.png]

其他情况可以自行测试。

[8d7127eecf104a1a836ef33ee08a6bfb.png]: /images/20220828/ca0351bbd7234ea5b33d1eef47c981e2.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAd2FuZzA5MDc_size_18_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/6ac8eadc1e514b9f8ce9da384a78dc95.png
[e13ef95a06024f749e56a1b40dc09bf2.png]: /images/20220828/7a0d13210b194dc9a333e0d0ca606966.png
[be73ae386e91456ea78e6289d88c1343.png]: /images/20220828/0d67310e065443e79b3e2efc74ea4b6c.png
[f353604592014e38be288670f585798a.png]: /images/20220828/8ec3f3dc15b340329741d93010dc1d46.png
[fe2e590ebc7747babaf945e9afcf33e6.png]: /images/20220828/e1e6deb48d794d639322f5fc88c77cda.png
[c216e2dc43e5419290d50847b0af4b9d.png]: /images/20220828/9670ededbe264e9b8344fb611347b85b.png