flowable使用

1.先导入依赖

 <dependency>
            <groupId>org.flowable</groupId>
            <artifactId>flowable-spring-boot-starter</artifactId>
            <version>6.7.2</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-io</artifactId>
                    <groupId>commons-io</groupId>
                </exclusion>
            </exclusions>
        </dependency>

2.提交流程

@Autowired
private RuntimeService runtimeService;

@Autowired
private TaskService taskService;

                           启动流程      流程的id         流程中携带的数据
 runtimeService.startProcessInstanceByKey("流程id", params);

          查询groups组下  在"流程id"     这个流程下的所有任务 

List<Task> tasks = taskService.createTaskQuery().processDefinitionKey("流程id").taskCandidateGroupIn(groups).list();

      获取这个任务中所携带的数据

Map<String, Object> params = taskService.getVariables(task.getId());

//根据任务id查询任务信息
Task task = taskService.createTaskQuery().processDefinitionKey("流程id").taskId(dto.getTaskId()).singleResult();

//提交任务  params  是任务中需要的参数.

taskService.complete(dto.getTaskId(), params);







列子：
1.bpmn20.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: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"
             xmlns:flowable="http://flowable.org/bpmn"
             typeLanguage="http://www.w3.org/2001/XMLSchema"
             expressionLanguage="http://www.w3.org/1999/XPath"
             targetNamespace="http://www.flowable.org/processdef">


    <process id="holidayRequest" name="Holiday Request"       
             isExecutable="true">                                                   //holidayRequest 这个是流程的id

        <startEvent id="startEvent"/>                                                //流程开始
        <sequenceFlow sourceRef="startEvent" targetRef="approveTask"/>              //从startEvent到approveTask任务

        <userTask id="approveTask" name="Approve or reject request"        
                  flowable:candidateGroups="managers"/>                             // candidateGroups   这个任务属于managers这个组            
        <sequenceFlow sourceRef="approveTask" targetRef="decision"/>

        <exclusiveGateway id="decision"/>
        <sequenceFlow sourceRef="decision" targetRef="externalSystemCall">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[${approved}]]>                                             //如果approved为true 则去externalSystemCall      否则走sendRejectionMail

            </conditionExpression>
        </sequenceFlow>
        <sequenceFlow sourceRef="decision" targetRef="sendRejectionMail">
            <conditionExpression xsi:type="tFormalExpression">
                <![CDATA[${!approved}]]>
            </conditionExpression>
        </sequenceFlow>

        <serviceTask id="externalSystemCall" name="Enter holidays inexternal system"
                     flowable:class="org.flowable.CallExternalSystemDelegate"/>                 //flowable:class="org.flowable.CallExternalSystemDelegate 走这个类
        <sequenceFlow sourceRef="externalSystemCall"
                      targetRef="holidayApprovedTask"/>

        <userTask id="holidayApprovedTask" name="Holiday approved"                   
                  flowable:assignee="${employee}"/>                                              //这个需要  flowable:assignee="${employee}   审批人名字和他提交流程时候存入的employee信息一样的人审批
        <sequenceFlow sourceRef="holidayApprovedTask" targetRef="approveEnd"/>

        <serviceTask id="sendRejectionMail" name="Send out rejection email"
                     flowable:class="org.flowable.SendRejectionMail"/>                           //flowable:class="org.flowable.SendRejectionMail走这个类
        <sequenceFlow sourceRef="sendRejectionMail" targetRef="rejectEnd"/>

        <endEvent id="approveEnd"/>
        <endEvent id="rejectEnd"/>
    </process>
</definitions>