在正常的flowable就是顯示當前節點,路徑須要咱們本身獲取,特別是來回的駁回會致使節點混亂,這裏主要就是如何正確的顯示流程圖網絡
效果:app
已經結束的流程ide
正在執行的流程this
代碼:一、生成圖片spa
// 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.獲取全部的歷史軌跡對象
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. 獲取流程定義的全部節點信息
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. 遞歸獲得高亮線
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 //www.1b23.com 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; } } }