activiti 5.16 businessKey如何为null处理。

本篇文章为大家展示了activiti 5.16 businessKey如何为null处理。，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

activiti版本 5.16

产生原因：创建子流程时，businesskey 不传递。

解决如下：

1、创建监听类：

import org.activiti.engine.delegate.event.ActivitiEntityEvent;import org.activiti.engine.delegate.event.ActivitiEvent;import org.activiti.engine.delegate.event.ActivitiEventListener;import org.activiti.engine.impl.persistence.entity.ExecutionEntity;import org.activiti.engine.impl.persistence.entity.TaskEntity;import org.apache.commons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class BusinessKeyInjectionActivitiEventListener implements ActivitiEventListener {    private Logger log = LoggerFactory.getLogger(getClass());    @Override    public void onEvent(ActivitiEvent event) {        switch (event.getType()) {            case TASK_CREATED:                if (event instanceof ActivitiEntityEvent) {                    ActivitiEntityEvent activityEntityEvent = (ActivitiEntityEvent) event;                    TaskEntity taskEntity = (TaskEntity) activityEntityEvent.getEntity();                    ExecutionEntity exEntity = taskEntity.getExecution();                    String key = exEntity.getBusinessKey();                    log.info("获取当前任务的流程实例的businessKey:{}",key);                    if(StringUtils.isEmpty(key)){                        ExecutionEntity superExecEntity = exEntity.getSuperExecution();                        key=superExecEntity.getBusinessKey();                        if(StringUtils.isEmpty(key)){                            key=superExecEntity.getProcessInstance().getBusinessKey();                        }                        log.info("获取当前任务 上一个流程实例的businessKey:{}",key);                        log.info("设置当前流程实例的businessKey:{}",key);                        exEntity.setBusinessKey(key);                        //让businessKey生效 此处非常关键。                        exEntity.updateProcessBusinessKey(key);                    }                    break;                }            default:                break;        }    }    @Override    public boolean isFailOnException() {        // TODO Auto-generated method stub        return false;    }}

2、配置监听：

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