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;
    }

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