如何解决go.mod file not found in current directory or any parent directory？

Environment variable configuration:

If the installation path is:/usr/local/go

Then configure the environment variables like this:

vi ~/.bash_profile

export GOPATH=$HOME/go

Then save and execute source ~/.bash_profile

报错go.mod file not found in current directory or any parent directory？

solve:go env -w GO111MODULE=auto

OK, problem solved