Flowable流程图路径与节点展示：已执行节点高亮红色标记，增强可视化效果

效果：

已经结束的流程

  正在执行的流程

 代码：1、生成图片

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// 源码 www.1b23.com
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

//www.1b23.com
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; 
} } }