important! How to convert date to custom format?

Hello, in earlier versions, you can use the Globalize.format() method to convert to different date formats, such as:
yyyyMMddHHmmss
MM/dd/yy
yyyy/MM/dd HH:mm
yyyy/MM/dd hh:mm a
dd-MMM-yy
How can I still get the above results after upgrading the version now? Please give me a solution, thank you!