Error: Importing packages in IntelliJ IDEA

Question

I downloaded a project from github https://github.com/zohebsait/ozay-backend , opened in IntelliJ IDEA IDE. This project contains some java files in it. Now I am trying to run the Application file, seems everything correct in the code but when compiling the code by right clicking Application it shows 2 errors,

Error: "package does not exist"

but when running it it shows 100 errors.

Can anybody tell me where is the issue and fix for it?

Answer 1

如果它使用maven生成项目，则应首先在终端上运行“ mvn clean install”命令。