activiti7业务表示Businesskey

启动流程实例时，指定的businesskey，就会在act_ru_execution #流程实例的执行表中存储businesskey。

Businesskey：业务标识，通常为业务表的主键，业务标识和流程实例一一对应。业务标识来源于业

务系统。存储业务标识就是根据业务标识来关联查询业务系统的数据。

比如：请假流程启动一个流程实例，就可以将请假单的 id 作为业务标识存储到 activiti 中，将来查询

activiti 的流程实例信息就可以获取请假单的 id 从而关联查询业务系统数据库得到请假单信息。

代码：

// 根据流程定义的key启动一个流程实例

ProcessInstance processInstance = runtimeService

.startProcessInstanceByKey(processDefinitionKey,

businessKey);

package com.zcc.activiti02;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.activiti.engine.runtime.ProcessInstance;

import java.util.List;

/**
 * 启动流程实例时添加businesskey
 */
public class BusinessKeyAdd {
    public static void main(String[] args) {
        //创建流程引擎配置类
        ProcessEngineConfiguration processEngineConfiguration=
                ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");
        //流程引擎对象
        ProcessEngine processEngine = processEngineConfiguration.buildProcessEngine();

        //得到runtimeservice
        RuntimeService runtimeService = processEngine.getRuntimeService();
        //启动流程实例，同时还要指定业务标识businesskey,本身就是请假单的id
        //第一个参数流程实例的key,第二个参数：业务表示businesskey
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("myProcess", "1001");

        System.out.println("businesskey:"+processInstance.getBusinessKey());

    }

}