（一）  开始一个请假流程
       //user是请假人的actorId
       ExecutionService es=JbpmServiceFactory.getInstance().openExecutionService(user);
        HashMap vs=new HashMap();
       //一些参数
        vs.put(Constants.REQUEST_STATUS,String.valueOf(0));
        vs.put(Constants.REQUEST_RETURN_INFO,"No info!");
        vs.put(Constants.USER_NAME,EncodeTransfer.toISO(user));
        vs.put(Constants.REQUEST_DAYS,String.valueOf(rea.getDays()));
        try {
           //开启请假流程
            es.startProcessInstance(Constants.WORK_NAME, vs);
            log.info("["+user+"]"+"申请假期开始！请假"+rea.getDays()+"天！");
            return am.findForward("main");
        } catch (ExecutionException ex) {
            ex.printStackTrace();
            log.error("请假进程无法开始！");
            return am.findForward("error");
        }finally{
            es.close();
        }
（二）当前执行任务
    对于部门经理或者老板，找到要处理的请假。
       String actorId = (String) req.getSession().getAttribute(Constants.USER);
            if(actorId.equals("wang")){
                actorId="boss";
            }else if(actorId.equals("bigli")){
                actorId="chief";
            }
            // get the execution service
            ExecutionService executionService = JbpmServiceFactory.getInstance().
                                                openExecutionService(actorId);

            // get the tasklist from jbpm for user
            List tasks = new ArrayList();
            // add the jbpm tasks
            tasks.addAll(executionService.getTaskList(actorId));
            // put the tasklist into the form
            mf.setTasks(tasks);
            // get the tasklist from jbpm for user
            List definitions = new ArrayList();
            // add the jbpm definitions
            definitions.addAll(executionService.getLatestDefinitions());
            // put the tasklist into the form
            mf.setRequests(definitions);
            // close the execution service
            executionService.close();
            req.getSession().setAttribute("mainForm",mf);
            log.debug("任务: " + tasks);
            log.debug("当前可以执行的请求: " + definitions);
（三）处理请假
           String actorId = (String) reqrest.getSession().getAttribute(Constants.
                    USER);
            Long tokenId=new Long(req.getParameter("tokenId"));
            // get the execution service
            ExecutionService executionService = JbpmServiceFactory.getInstance().
                                                openExecutionService(actorId);
            Map hm=executionService.getVariables(tokenId);//变量
            String act=req.getParameter("action");//进行转换的transition
            executionService.endOfState(tokenId,hm,act);
            executionService.close();