在正常的flowable就是顯示當前節點,路徑需要我們自己獲取,特別是來回的駁回會導致節點混亂,這裏主要就是如何正確的顯示流程圖
效果:
已經結束的流程
正在執行的流程
代碼:1、生成圖片
// 源碼 www.1b23.com
public byte[] createImage2(String processInstanceId) {
//1.獲取當前的流程實例
ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
String processDefinitionId = null;
List<String> activeActivityIds = null;
//2.獲取所有的歷史軌跡對象
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. 獲取流程定義id和高亮的節點id
if (processInstance != null) {
//3.1. 正在運行的流程實例
processDefinitionId = processInstance.getProcessDefinitionId();
activeActivityIds = runtimeService.getActiveActivityIds(processInstanceId);
} else {
//3.2. 已經結束的流程實例
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. 獲取流程定義的所有節點信息
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. 遞歸得到高亮線
activeActivityIds.forEach(activeActivityId -> this.getHighLightedFlows(activityMap, hisActivityMap, activeActivityId, highLightedFlows, activeActivityId));
//6. 獲取bpmnModel對象
BpmnModel bpmnModel = bpmnModelService.getBpmnModelByProcessDefId(processDefinitionId);
//7. 生成圖片流
InputStream inputStream = flowProcessDiagramGenerator.generateDiagram(bpmnModel, activeActivityIds, highLightedFlows);
//8. 轉化成byte便於網絡傳輸
byte[] datas = IoUtil.readInputStream(inputStream, "image inputStream name");
return datas;
}
遞歸獲取高
//java項目 www.fhadmin.org
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;
} } }