flowable显示流程图,路径和节点
背景: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
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<String> activeActivityIds = null; //2.获取所有的历史轨迹对象 List<HistoricActivityInstance> list = historyService.createHistoricActivityInstanceQuery() .processInstanceId(processInstanceId).list(); Map<String, HistoricActivityInstance> 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<EndEvent> endEvents = bpmnModelService.findEndFlowElement(processDefinitionId); List<String> 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<FlowNode> flowNodes = bpmnModelService.findFlowNodes(processDefinitionId); Map<String, FlowNode> activityMap = flowNodes.stream().collect(Collectors.toMap(FlowNode::getId, flowNode -> flowNode)); List<String> 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; }
2、递归获取高private void getHighLightedFlows(
Map<String, FlowNode> flowNodeMap, Map<String, HistoricActivityInstance> hisActivityMap, String activeActivityId, List<String> highLightedFlows, String oldActivityId) { FlowNode flowNode = flowNodeMap.get(activeActivityId); List<SequenceFlow> 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;
} } }
如果有什么不懂的,可以随时问我,也可以加入我们qq群633168411,里面都是flowable爱好者,不搞虚的,只讲实的。