解決unrecognized import path "golang.org/x/..問題

安裝beego爆出：unrecognized import path "golang.org/x/sys/windows":

windows:

在gopath目錄src下創建golang.org目錄，在golang.org目錄下創建x目錄，參考路徑為：C:\go\src\golang.org\x

在x目錄下，

git clone https://github.com/golang/sync.git
git clone https://github.com/golang/crypto.git
git clone https://github.com/golang/sys.git