一個強大的定時服務程序，因為經常會遇到要定時作同樣的一件事，但有時又會忘記，所以寫了這個服務程序，有點像Sql的Job定時一樣，可以設定多久執行一次。-A strong service program from time to time, because often when we try to regularly do the same thing, but sometimes forget, so this service has written procedures, a bit like