How does eclipse modify the project name?

Previously, I first created a test project named testaaa, which was called testaaa when deployed to Tomcat. Now I need to export the war package of the project to someone else and don't want to call it test, therefore, rename is used to change the project name to AAA in eclipse, but it is still called testaaa when deployed to Tomcat,

I tested it and found the change.

 

 

Right-click the project name and choose-> properties,

Then choose-> myeclipse,

Select-> Web

Then, select "-> context root" on the right. The web context-root attribute is "testaaa". After the attribute is changed to "AAA,

 

Redeploy. The project generated in the Tomcat directory is AAA. Open IE and access it.