Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我的 java web 项目中有日历事件，我想在某个时间之前发送提醒（时间可以是分钟/小时/秒，取决于创建事件时的选择），我如何在这些特定时间之前发送邮件？