本篇文章為大家展示了activiti 5.16 businessKey如何為null處理。，內容簡明扼要并且容易理解，絕對能使你眼前一亮，通過這篇文章的詳細介紹希望你能有所收獲。

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activiti版本 5.16

產生原因：創(chuàng)建子流程時，businesskey 不傳遞。

解決如下：

1、創(chuàng)建監(jiān)聽類：

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("獲取當前任務的流程實例的businessKey:{}",key);
                    if(StringUtils.isEmpty(key)){
                        ExecutionEntity superExecEntity = exEntity.getSuperExecution();
                        key=superExecEntity.getBusinessKey();
                        if(StringUtils.isEmpty(key)){
                            key=superExecEntity.getProcessInstance().getBusinessKey();
                        }
                        log.info("獲取當前任務 上一個流程實例的businessKey:{}",key);
                        log.info("設置當前流程實例的businessKey:{}",key);
                        exEntity.setBusinessKey(key);
                        //讓businessKey生效 此處非常關鍵。
                        exEntity.updateProcessBusinessKey(key);
                    }
                    break;
                }
            default:
                break;
        }
    }

    @Override
    public boolean isFailOnException() {
        // TODO Auto-generated method stub
        return false;
    }
}

2、配置監(jiān)聽：

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