Cron表达式生成器关闭时销毁，避免再次打开时存在上一次修改的数据

RuoYi

2021-09-18 e1037ac125634f637cf9e0860a51badcad78975b

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Spring Boot Version: ${spring-boot.version} 
Spring Application Name: ${spring.application.name} 
                            _                        _    _      
                           (_)                      | |  | |     
 _ __  _   _   ___   _   _  _  ______   __ _  _   _ | |_ | |__   
| '__|| | | | / _ \ | | | || ||______| / _` || | | || __|| '_ \  
| |   | |_| || (_) || |_| || |        | (_| || |_| || |_ | | | | 
|_|    \__,_| \___/  \__, ||_|         \__,_| \__,_| \__||_| |_| 
                      __/ |                                      
                     |___/