说明
详见：flowable6.3教程-部门经理审批-排他网关、流程变量、流程详解（关键）
流程定义中，部门经理 拒绝 时，自动调用 SendRejectionMail 类
需要实现 org.flowable.SendRejectionMail 类，该类实现 JavaDelegate 接口
package org.flowable;
import org.flowable.engine.delegate.DelegateExecution;
import org.flowable.engine.delegate.JavaDelegate;
public class SendRejectionMail implements JavaDelegate {
@Override
public void execute(DelegateExecution execution) {
System.out.println(String.format("模拟操作：给【%s】发送拒绝请假邮件",
execution.getVariable("emp")));
}
}