idea 模板变量

参考官方文档
Predefined template variables
The following predefined variables can be used in file templates:

Variable	Description
$DATE}	Current system date
$DAY}	Current day of the month
$DIR_PATH}	Path to the directory of the new file (relative to the project root)
$DS}	Dollar sign $. This variable is used to escape the dollar haracter,so that it is not treated as a prefix of a template variable.
$FILE_NAME}	Name of the new file
$HOUR}	Current hour
$MINUTE}	Current minute
$SECOND}	Current second
$MONTH}	Current month
$MONTH_NAME_FULL}	Full name of the current month (January, February, and so on)
$MONTH_NAME_SHORT}	First three letters of the current month name (Jan, Feb, and so on)
$NAME}	Name of the new entity (file, %class%, interface, and so on)
$PRODUCT_NAME}	Name of the IDE (for example, PyCharm)
$PROJECT_NAME}	Name of the current project
$TIME}	Current system time
$USER}	Login name of the current user
$YEAR}	Current year