java running jar package error: there is no main list attribute, the error is still reported after configuring the main class, and finally resolved.

Today, when I was typing the jar package, I stepped on the pit at runtime:

There is no problem with packaging and running in idea, but an error is reported when running java -jar:

Most of the methods found on the Internet are to specify the main class.

I have already specified it but still report an error. There is still a way to say not to specify the mainClass, or useless.

In fact, it should be added again and

packaged again:

it was found that the version of maven was not specified,

and it succeeded after adding: