Activiti6.0生成流程跟踪图，高亮显示

最新推荐文章于 2025-05-06 17:01:56 发布

洗个头发

最新推荐文章于 2025-05-06 17:01:56 发布

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分类专栏： activiti 文章标签： activiti6.0

本文链接：https://blog.youkuaiyun.com/xzy645368279/article/details/89459145

本文介绍如何在Activiti6.0中生成带有高亮显示的流程跟踪图，包括控制器和业务逻辑代码实现，以及重写源码以支持特定功能。

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Activiti6.0生成流程跟踪图，高亮显示

##实现的效果一
在这里插入图片描述

controller代码

@RequestMapping("viewProcessImg")
    public void viewProcessImg(String processId, HttpServletResponse response) {
   
   

        try {
   
   
            byte[] processImage = activitiService.getProcessImage(processId);

            OutputStream outputStream = response.getOutputStream();
            InputStream in = new ByteArrayInputStream(processImage);
            IOUtils.copy(in, outputStream);
        } catch (Exception e) {
   
   
            logger.error("viewProcessImg---- {}", ExceptionUtil.stackTraceText(e));
        }

    }

service代码

public byte[] getProcessImage(String processInstanceId) throws Exception {
   
   
        //  获取历史流程实例
        HistoricProcessInstance historicProcessInstance = queryHistoricProcessInstance(processInstanceId);
        if (historicProcessInstance == null) {
   
   
            throw new Exception();
        } else {
   
   
            // 获取流程定义
            ProcessDefinitionEntity processDefinition = (ProcessDefinitionEntity) repositoryService
                    .getProcessDefinition(historicProcessInstance.getProcessDefinitionId());

            // 获取流程历史中已执行节点，并按照节点在流程中执行先后顺序排序
            List<HistoricActivityInstance> historicActivityInstanceList = historyService
                    .createHistoricActivityInstanceQuery().processInstanceId(processInstanceId)
                    .orderByHistoricActivityInstanceId().desc().list();
            // 已执行的节点ID集合
            List<String> executedActivityIdList = new ArrayList<>();
            @SuppressWarnings("unused") int index = 1;
            logger.info("获取已经执行的节点ID");
            for (HistoricActivityInstance activityInstance : historicActivityInstanceList) {
   
   
                executedActivityIdList.add(activityInstance.getActivityId())；
                index++;
            }
            // 获取流程图图像字符流
            BpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinition.getId());

            //已执行flow的集和
            List<String> executedFlowIdList = getHighLightedFlows(bpmnModel,historicActivityInstanceList);


            ProcessDiagramGenerator processDiagramGenerator = processEngine.getProcessEngineConfiguration().getProcessDiagramGenerator();
            InputStream imageStream = processDiagramGenerator.generateDiagram(bpmnModel, "png", executedActivityIdList,executedFlowIdList, "黑体","黑体","黑体",null,1.0);

            byte[] buffer = new byte[imageStream.available()];
            imageStream.read(buffer);
            imageStream.close();
            return buffer;
        }
    }


    /**
     * 获取已经流转的线
     *
     * @para