activiti中有任务id,获取当前流程节点的信息

/**     * 查询当前流程图     * @param taskId     * @param response     * @return     * @throws Exception     */    @RequestMapping("/showCurrentView")    public ModelAndView showCurrentView(String taskId,HttpServletResponse response)throws Exception{        ModelAndView mav=new ModelAndView();        Task task=taskService.createTaskQuery() // 创建任务查询                .taskId(taskId) // 根据任务id查询                .singleResult();         String processDefinitionId=task.getProcessDefinitionId(); // 获取流程定义id        ProcessDefinition processDefinition=repositoryService.createProcessDefinitionQuery() // 创建流程定义查询                .processDefinitionId(processDefinitionId) // 根据流程定义id查询                .singleResult();         mav.addObject("deploymentId",processDefinition.getDeploymentId()); // 部署id        mav.addObject("diagramResourceName", processDefinition.getDiagramResourceName()); // 图片资源文件名称        ProcessDefinitionEntity processDefinitionEntity=(ProcessDefinitionEntity) repositoryService.getProcessDefinition(processDefinitionId);         String processInstanceId=task.getProcessInstanceId(); // 获取流程实例id        ProcessInstance pi=runtimeService.createProcessInstanceQuery() // 根据流程实例id获取流程实例                .processInstanceId(processInstanceId)                .singleResult();        ActivityImpl activityImpl=processDefinitionEntity.findActivity(pi.getActivityId()); // 根据活动id获取活动实例        mav.addObject("x", activityImpl.getX()); // x坐标        mav.addObject("y", activityImpl.getY()); // y坐标        mav.addObject("width", activityImpl.getWidth()); // 宽度        mav.addObject("height", activityImpl.getHeight()); // 高度        mav.setViewName("page/currentView");        return mav;    }