通过传入流程启动id去查询当前流执行节点
返回流程图 到期节点 标红显示

	    /*** 生成流程图** @param processId 任务ID*/@RequestMapping(value = "processDiagram")public void genProcessDiagram(HttpServletResponse httpServletResponse, String processId) throws Exception {ProcessInstance pi = runtimeService.createProcessInstanceQuery().processInstanceId(processId).singleResult();//流程走完的不显示图if (pi == null) {return;}Task task = taskService.createTaskQuery().processInstanceId(pi.getId()).singleResult();//使用流程实例ID，查询正在执行的执行对象表，返回流程实例对象String InstanceId = task.getProcessInstanceId();List<Execution> executions = runtimeService.createExecutionQuery().processInstanceId(InstanceId).list();//得到正在执行的Activity的IdList<String> activityIds = new ArrayList<>();List<String> flows = new ArrayList<>();for (Execution exe : executions) {List<String> ids = runtimeService.getActiveActivityIds(exe.getId());activityIds.addAll(ids);}//获取流程图BpmnModel bpmnModel = repositoryService.getBpmnModel(pi.getProcessDefinitionId());ProcessEngineConfiguration engconf = processEngine.getProcessEngineConfiguration();ProcessDiagramGenerator diagramGenerator = engconf.getProcessDiagramGenerator();InputStream in = diagramGenerator.generateDiagram(bpmnModel, "png", activityIds, flows, engconf.getActivityFontName(), engconf.getLabelFontName(), engconf.getAnnotationFontName(), engconf.getClassLoader(), 1.0, false);OutputStream out = null;byte[] buf = new byte[1024];int legth = 0;try {out = httpServletResponse.getOutputStream();while ((legth = in.read(buf)) != -1) {out.write(buf, 0, legth);}} finally {if (in != null) {in.close();}if (out != null) {out.close();}}}