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分类: Java
2021-04-17 21:07:58
在正常的flowable就是显示当前节点,路径需要我们自己获取,特别是来回的驳回会导致节点混乱,这里主要就是如何正确的显示流程图
效果:
已经结束的流程
正在执行的流程
代码:1、生成图片
// 源码 www fhadmin org public byte[] createImage2(String processInstanceId) { //1.获取当前的流程实例 ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult(); String processDefinitionId = null; List activeActivityIds = null; //2.获取所有的历史轨迹对象 List list = historyService.createHistoricActivityInstanceQuery() .processInstanceId(processInstanceId).list(); Map hisActivityMap = new HashMap<>(); list.forEach(historicActivityInstance -> { if (!hisActivityMap.containsKey(historicActivityInstance.getActivityId())) { hisActivityMap.put(historicActivityInstance.getActivityId(), historicActivityInstance); } }); //3. 获取流程定义id和高亮的节点id if (processInstance != null) { //3.1. 正在运行的流程实例 processDefinitionId = processInstance.getProcessDefinitionId(); activeActivityIds = runtimeService.getActiveActivityIds(processInstanceId); } else { //3.2. 已经结束的流程实例 HistoricProcessInstance historicProcessInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(processInstanceId).singleResult(); processDefinitionId = historicProcessInstance.getProcessDefinitionId(); activeActivityIds = new ArrayList<>(); List endEvents = bpmnModelService.findEndFlowElement(processDefinitionId); List finalActiveActivityIds = activeActivityIds; endEvents.forEach(endEvent -> { if (hisActivityMap.containsKey(endEvent.getId())) { finalActiveActivityIds.add(endEvent.getId()); } }); } //4. 获取流程定义的所有节点信息 List flowNodes = bpmnModelService.findFlowNodes(processDefinitionId); Map activityMap = flowNodes.stream().collect(Collectors.toMap(FlowNode::getId, flowNode -> flowNode)); List highLightedFlows = new ArrayList<>(); //5. 递归得到高亮线 activeActivityIds.forEach(activeActivityId -> this.getHighLightedFlows(activityMap, hisActivityMap, activeActivityId, highLightedFlows, activeActivityId)); //6. 获取bpmnModel对象 BpmnModel bpmnModel = bpmnModelService.getBpmnModelByProcessDefId(processDefinitionId); //7. 生成图片流 InputStream inputStream = flowProcessDiagramGenerator.generateDiagram(bpmnModel, activeActivityIds, highLightedFlows); //8. 转化成byte便于网络传输 byte[] datas = IoUtil.readInputStream(inputStream, "image inputStream name"); return datas; }
递归获取高
//java项目 www fhadmin org private void getHighLightedFlows(Map flowNodeMap, Map hisActivityMap, String activeActivityId, List highLightedFlows, String oldActivityId) { FlowNode flowNode = flowNodeMap.get(activeActivityId); List incomingFlows = flowNode.getIncomingFlows(); for (SequenceFlow sequenceFlow : incomingFlows) { String sourceRefId = sequenceFlow.getSourceRef(); if (hisActivityMap.containsKey(sourceRefId) && !oldActivityId.equals(sourceRefId)) { highLightedFlows.add(sequenceFlow.getId()); this.getHighLightedFlows(flowNodeMap, hisActivityMap, sourceRefId, highLightedFlows, oldActivityId); } else { if (hisActivityMap.containsKey(sourceRefId)){ highLightedFlows.add(sequenceFlow.getId()); } break; } } }
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