activiti任务监听可以获取启动流程时的参数

Map<String, Object> params=new HashMap<String, Object>();
params.put("dgroup", oid);

ProcessInstance processInstance=runtimeService.startProcessInstanceByKey(processKey,businessKey,params);

map中的param参数或存放在activiti提供的act_ru_variable表中；

class MyTaskListener implements TaskListener{

      public void notify(DelegateTask dTask) {

                  String groupId= (String) runtimeService.getVariable(delegateTask.getExecutionId(), "dgroup");

       }

}