类钉钉，activiti5.22发起流程时候动态指定审批人

完整项目

一个简单的申请流程如下：

<?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="usertask"><process id="usertask" name="usertask" isExecutable="true"><startEvent id="startevent1" name="Start" activiti:initiator="${applyuserid}"></startEvent><userTask id="usertask1" name="领导审批" activiti:assignee="${taskUserId}"><extensionElements><activiti:taskListener event="all" class="listener.MyExecutionListener"></activiti:taskListener></extensionElements></userTask><sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow><exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway><endEvent id="endevent1" name="End"></endEvent><sequenceFlow id="flow2" sourceRef="usertask1" targetRef="exclusivegateway1"></sequenceFlow><sequenceFlow id="flow3" name="同意" sourceRef="exclusivegateway1" targetRef="endevent1"><conditionExpression xsi:type="tFormalExpression"><![CDATA[${approve=='true'}]]></conditionExpression></sequenceFlow><userTask id="modifyapply" name="调整申请" activiti:assignee="${applyuserid}"></userTask><sequenceFlow id="flow4" name="不同意" sourceRef="exclusivegateway1" targetRef="modifyapply"><conditionExpression xsi:type="tFormalExpression"><![CDATA[${approve=='false'}]]></conditionExpression></sequenceFlow><exclusiveGateway id="exclusivegateway2" name="Exclusive Gateway"></exclusiveGateway><sequenceFlow id="flow5" sourceRef="modifyapply" targetRef="exclusivegateway2"></sequenceFlow><sequenceFlow id="flow6" name="放弃申请" sourceRef="exclusivegateway2" targetRef="endevent1"><conditionExpression xsi:type="tFormalExpression"><![CDATA[${reapply=='false'}]]></conditionExpression></sequenceFlow><sequenceFlow id="flow7" name="重新申请" sourceRef="exclusivegateway2" targetRef="usertask1"><conditionExpression xsi:type="tFormalExpression"><![CDATA[${reapply=='true'}]]></conditionExpression></sequenceFlow></process><bpmndi:BPMNDiagram id="BPMNDiagram_usertask"><bpmndi:BPMNPlane bpmnElement="usertask" id="BPMNPlane_usertask"><bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1"><omgdc:Bounds height="35.0" width="35.0" x="121.0" y="100.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1"><omgdc:Bounds height="55.0" width="105.0" x="300.0" y="90.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1"><omgdc:Bounds height="40.0" width="40.0" x="530.0" y="97.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1"><omgdc:Bounds height="35.0" width="35.0" x="760.0" y="100.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="modifyapply" id="BPMNShape_modifyapply"><omgdc:Bounds height="55.0" width="105.0" x="498.0" y="290.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="exclusivegateway2" id="BPMNShape_exclusivegateway2"><omgdc:Bounds height="40.0" width="40.0" x="530.0" y="410.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1"><omgdi:waypoint x="156.0" y="117.0"></omgdi:waypoint><omgdi:waypoint x="300.0" y="117.0"></omgdi:waypoint></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2"><omgdi:waypoint x="405.0" y="117.0"></omgdi:waypoint><omgdi:waypoint x="530.0" y="117.0"></omgdi:waypoint></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3"><omgdi:waypoint x="570.0" y="117.0"></omgdi:waypoint><omgdi:waypoint x="760.0" y="117.0"></omgdi:waypoint><bpmndi:BPMNLabel><omgdc:Bounds height="14.0" width="100.0" x="570.0" y="117.0"></omgdc:Bounds></bpmndi:BPMNLabel></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4"><omgdi:waypoint x="550.0" y="137.0"></omgdi:waypoint><omgdi:waypoint x="550.0" y="290.0"></omgdi:waypoint><bpmndi:BPMNLabel><omgdc:Bounds height="14.0" width="100.0" x="550.0" y="137.0"></omgdc:Bounds></bpmndi:BPMNLabel></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5"><omgdi:waypoint x="550.0" y="345.0"></omgdi:waypoint><omgdi:waypoint x="550.0" y="410.0"></omgdi:waypoint></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6"><omgdi:waypoint x="570.0" y="430.0"></omgdi:waypoint><omgdi:waypoint x="777.0" y="429.0"></omgdi:waypoint><omgdi:waypoint x="777.0" y="135.0"></omgdi:waypoint><bpmndi:BPMNLabel><omgdc:Bounds height="14.0" width="100.0" x="601.0" y="430.0"></omgdc:Bounds></bpmndi:BPMNLabel></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow7" id="BPMNEdge_flow7"><omgdi:waypoint x="530.0" y="430.0"></omgdi:waypoint><omgdi:waypoint x="352.0" y="429.0"></omgdi:waypoint><omgdi:waypoint x="352.0" y="145.0"></omgdi:waypoint><bpmndi:BPMNLabel><omgdc:Bounds height="14.0" width="100.0" x="411.0" y="430.0"></omgdc:Bounds></bpmndi:BPMNLabel></bpmndi:BPMNEdge></bpmndi:BPMNPlane></bpmndi:BPMNDiagram>
</definitions>

动态指定审批人，bpmn文件不能写死，需要指定成变量方式，流程启动时候以流程变量方式传入。
start节点：

领导审批节点：

调整申请节点：

发起流程时候，获取bpmn文件的全部usertask节点变量并动态设置值（一般用户UI选择的值），然后以流程变量方式发起流程：
获取bpmn文件的usertask节点的Assignee变量：

        //流程定义KEYString  definitionKey = "usertask";//发起者String applyuserid = "123456789";String taskUserId = "987654321";//businesskeyString businesskey = "businesskey";//模拟租户IDString tenantId = "1311197133446770699";//解析bpmn文件，获取usertask节点信息List<ProcessDefinition> processDefinitionList = rep.createProcessDefinitionQuery().processDefinitionKey(definitionKey).orderByProcessDefinitionVersion().desc().list();BpmnModel bpmnModel = rep.getBpmnModel(processDefinitionList.get(0).getId());//简单流程获取Process//复杂的多个执行exceute分支,使用：bpmnModel.getProcesses()org.activiti.bpmn.model.Process process = bpmnModel.getMainProcess();List<UserTask> userTaskList = process.findFlowElementsOfType(UserTask.class);Iterator<UserTask> it = userTaskList.iterator();while (it.hasNext()) {UserTask ut = (UserTask) it.next();String assignee = ut.getAssignee();String id = ut.getId();String name = ut.getName();System.out.println(String.format("assignee=%s,id=%s,name=%s", assignee,id,name));}

解析获取assignee变量：taskUserId、applyuserid作为key并赋值value（一般用户UI选择的值），最后启动流程实例：

     Map<String,Object> variables=new HashMap<String, Object>();    //流程启动人的信息variables.put("applyuserid", "123456789");    variables.put("taskUserId", "987654321");//设置发起人    identityservice.setAuthenticatedUserId(applyuserid);ProcessInstance instance = runservice.startProcessInstanceByKeyAndTenantId(definitionKey,businesskey,variables,tenantId);ProcessDefinition processDefinition = rep.createProcessDefinitionQuery().processDefinitionId(instance.getProcessDefinitionId()).singleResult();runservice.setProcessInstanceName(instance.getProcessInstanceId(),processDefinition.getName());System.out.println("processInstanceId:" + instance.getProcessInstanceId());

用户获取自己可以审批的任务，放弃API，自己写SQL实现（涉及流程实例历史表ACT_HI_PROCINST 、流程任务运行时表ACT_RU_TASK 、流程定义表ACT_RE_PROCDEF ，3张）：

        selectdistinct RES.*,arp.NAME_ AS DEF_NAME_,arp.KEY_ AS DEF_KEY_,arp.CATEGORY_  AS DEF_CATEGORY_,arp.VERSION_,arp.SUSPENSION_STATE_ ,ahp.START_TIME_,ahp.END_TIME_,ahp.START_USER_ID_,ahp.PROC_INST_ID_fromACT_RU_TASK RESleft join ACT_RE_PROCDEF arpon RES.PROC_DEF_ID_ = arp.ID_left join ACT_HI_PROCINST ahp onRES.PROC_INST_ID_ = ahp.PROC_INST_ID_whereRES.ID_  > 0and((exists(selectdistinct LINK.USER_ID_fromACT_RU_IDENTITYLINK LINKwhereUSER_ID_ = '987654321'and LINK.TASK_ID_ = RES.ID_)or RES.ASSIGNEE_ = '987654321'or RES.OWNER_ = '987654321'))

下面是一些完成任务的操作：

        //领导审批（完成任务）String taskId = "122505";String processInstanceId= "117522";Map<String,Object> variablesComplete=new HashMap<String,Object>();//完成任务variablesComplete.put("approve", "true");//添加审批评论taskservice.addComment(taskId, processInstanceId, "同意了，继续加油");//多个人处理的时候，拾取任务//taskId查询Task对象Task task=taskservice.createTaskQuery().taskId(taskId).singleResult();//拾取任务try{//已经指定就不要拾取任务if(StringUtils.isBlank(task.getAssignee())){taskservice.claim(taskId,taskUserId);}//完成任务taskservice.complete(taskId, variablesComplete);}catch(Exception e){e.printStackTrace();}

如果被领导驳回，重新发起申请：

       //驳回，重新审批String taskId = "120005";String processInstanceId= "117522";Map<String,Object> variablesComplete=new HashMap<String,Object>();variablesComplete.put("reapply", "true");taskservice.addComment(taskId, processInstanceId, "发起人重新申请");//多个人处理的时候，拾取任务//taskId查询Task对象Task task=taskservice.createTaskQuery().taskId(taskId).singleResult();//拾取任务try{if(StringUtils.isBlank(task.getAssignee())){taskservice.claim(taskId,taskUserId);}//完成任务taskservice.complete(taskId, variablesComplete);}catch(Exception e){e.printStackTrace();}

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