ApplicationLaunchMode

使用一个独立的非守护线程来保持程序活跃。

不进行任何行为，适用于环境中有其他可保证程序运行的内容， 例如 spring-web。是默认选项

Returns a representation of an immutable list of all enum entries, in the order they're declared.

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Returns an array containing the constants of this enum type, in the order they're declared.