Activiti 指定节点跳转(适合退回、撤回)流程

        //方法一，画退回的路线，设置退回的条件值
//方法二，退回到指定环节
@RequestMapping("/rollBackToAssgin.do")
public void rollBackToAssignWoekFlow(@RequestParam("processInstanceId") String processInstanceId,String destTaskkey){
// 取得当前任务.当前任务节点
destTaskkey ="usertask1";
       // HistoricTaskInstance currTask = historyService.createHistoricTaskInstanceQuery().taskId(taskId).singleResult();
Map variables;
ExecutionEntity entity = (ExecutionEntity) runtimeService.createExecutionQuery().executionId(processInstanceId).singleResult();
ProcessDefinitionEntity definition = (ProcessDefinitionEntity)((RepositoryServiceImpl)repositoryService)
          .getDeployedProcessDefinition(entity.getProcessDefinitionId());
variables = entity.getProcessVariables();
//当前活动环节
ActivityImpl currActivityImpl = definition.findActivity(entity.getActivityId());
//目标活动节点
ActivityImpl nextActivityImpl = ((ProcessDefinitionImpl) definition).findActivity(destTaskkey);
if(currActivityImpl !=null){
//所有的出口集合
List pvmTransitions = currActivityImpl.getOutgoingTransitions();
List oriPvmTransitions = new ArrayList();
for(PvmTransition transition : pvmTransitions){
oriPvmTransitions.add(transition);
}
//清除所有出口
pvmTransitions.clear();
//建立新的出口
List transitionImpls = new ArrayList();
TransitionImpl tImpl = currActivityImpl.createOutgoingTransition();
tImpl.setDestination(nextActivityImpl);
transitionImpls.add(tImpl);

List list = taskService.createTaskQuery().processInstanceId(entity.getProcessInstanceId())
.taskDefinitionKey(entity.getActivityId()).list();
for(Task task:list){
taskService.complete(task.getId(), variables);
historyService.deleteHistoricTaskInstance(task.getId());
}

for(TransitionImpl transitionImpl:transitionImpls){
currActivityImpl.getOutgoingTransitions().remove(transitionImpl);
}

for(PvmTransition pvmTransition:oriPvmTransitions){
pvmTransitions.add(pvmTransition);
}
}

}

     //方法三

  private static Logger logger = Logger.getLogger(HandlerPeocessAction.class);
//强制改变当前运行中的流程环节
@RequestMapping("/rejectTaskTo.do")
public void rejectTaskTo(@RequestParam("taskId") String taskId,@RequestParam("activityId") String activityId) throws Exception{
   
   logger.info("开始驳回任务，任务原点:::"+taskId+",驳回至:::"+activityId);
        HistoricTaskInstance historicTaskInstance = historyService.createHistoricTaskInstanceQuery()
                        .taskId(taskId).finished().singleResult();
        if(historicTaskInstance !=null){
        throw new Exception("任务已结束，不能进行回退操作！");
        }
        if(activityId == null || "".equals(activityId)){
        throw new Exception("回退目标节点不能为空！");
        }
        long count = taskService.createTaskQuery().taskId(taskId).count();
        if(count == 0){
        throw new Exception("要驳回的任务已不存在！");
        }
        
        Task currentTask = taskService.createTaskQuery().taskId(taskId).singleResult();
        ProcessDefinitionEntity definitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getProcessDefinition(currentTask.getProcessDefinitionId());
        String instanceId = currentTask.getProcessInstanceId();
        ActivityImpl activityImpl = definitionEntity.findActivity(activityId);
        if(activityImpl == null){
        throw new Exception("要驳回的节点不存在！");
        }
        managerService.executeCommand(new JumpActivityCmd(activityId, instanceId)) ; //managerService activiti 七大服务之一
        logger.info("完成驳回操作============");
}

package com.test;


import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
import org.activiti.engine.impl.pvm.process.ActivityImpl;
import org.activiti.engine.impl.pvm.process.ProcessDefinitionImpl;


public class JumpActivityCmd implements Command