Idea maven Tomcat configures hot updates and maven jar dependencies

Watched the video really can not help on the idea of pirate but this thing really a bit of pit dad, because the use of fewer people, so a lot of configuration is problematic

For example, MAVEN configures the Tomcat hot update and the MAVEN configuration of Tomcat

I'll put some pictures here for backup.

Configure MAVEN Web project with Tomcat you must choose this button to go in and then add some maven dependencies to Tomcat, or Tomcat will not find the jar package, and then when the Web runs, the error will not occur when it starts.

I've added maven dependencies here, so there's no problem, there's no elements this list option on the right.

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Idea maven Tomcat configures hot updates and maven jar dependencies