flowable 获取当前任务流程图片的输入流
/** * 获取当前任务流程图片的输入流 * @param PROC_INST_ID_ 流程实例ID * @from fhadmin.cn */ public InputStream genProcessDiagram(String PROC_INST_ID_, String type){ /* 获得活动的节点 */ String processDefinitionId = ""; if (this.isFinished(PROC_INST_ID_)) { // 如果流程已经结束,则得到结束节点 HistoricProcessInstance pi = historyService.createHistoricProcessInstanceQuery().processInstanceId(PROC_INST_ID_).singleResult(); processDefinitionId=pi.getProcessDefinitionId(); } else { // 如果流程没有结束,则取当前活动节点 /* 根据流程实例ID获得当前处于活动状态的ActivityId合集 */ ProcessInstance pi = runtimeService.createProcessInstanceQuery().processInstanceId(PROC_INST_ID_).singleResult(); processDefinitionId = pi.getProcessDefinitionId(); } /* 获得活动的节点对象 */ List<HistoricActivityInstance> highLightedActivitList = historyService.createHistoricActivityInstanceQuery().processInstanceId(PROC_INST_ID_).orderByHistoricActivityInstanceStartTime().asc().list(); List<String> highLightedActivitis = new ArrayList<String>(); //节点对象ID for(HistoricActivityInstance tempActivity : highLightedActivitList){ String activityId = tempActivity.getActivityId(); highLightedActivitis.add(activityId); } BpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinitionId); //获取流程图 ProcessEngineConfiguration engconf = processEngine.getProcessEngineConfiguration(); /* 获得活动的连线对象 */ List<String> flows = new ArrayList<>(); //连线ID if("RU".equals(type)) { List<ActivityInstance> highLightedFlowInstances = runtimeService.createActivityInstanceQuery().activityType(BpmnXMLConstants.ELEMENT_SEQUENCE_FLOW).processInstanceId(PROC_INST_ID_).list(); for(ActivityInstance ai : highLightedFlowInstances) { flows.add(ai.getActivityId()); } }else { List<HistoricActivityInstance> highLightedFlowInstances = historyService.createHistoricActivityInstanceQuery().activityType(BpmnXMLConstants.ELEMENT_SEQUENCE_FLOW).processInstanceId(PROC_INST_ID_).list(); for(HistoricActivityInstance ha : highLightedFlowInstances) { flows.add(ha.getActivityId()); } } ProcessDiagramGenerator diagramGenerator = engconf.getProcessDiagramGenerator(); InputStream in = diagramGenerator.generateDiagram(bpmnModel, "png", highLightedActivitis, flows, engconf.getActivityFontName(), engconf.getLabelFontName(), engconf.getAnnotationFontName(), engconf.getClassLoader(), 1.0, true); return in; }