Flowable通过api查询流程返回流程图节点

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Id
          List<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();
              }
          }
      }