diff --git a/generate/swaggergen/g_docs.go b/generate/swaggergen/g_docs.go
index b68986d..a9f1c0a 100644
--- a/generate/swaggergen/g_docs.go
+++ b/generate/swaggergen/g_docs.go
@@ -36,6 +36,7 @@ import (
 	"github.com/astaxie/beego/swagger"
 	"github.com/astaxie/beego/utils"
 	beeLogger "github.com/beego/bee/logger"
+	bu "github.com/beego/bee/utils"
 )
 
 const (
@@ -141,7 +142,7 @@ func parsePackageFromDir(path string) error {
 func GenerateDocs(curpath string) {
 	fset := token.NewFileSet()
 
-	f, err := parser.ParseFile(fset, path.Join(curpath, "routers", "router.go"), nil, parser.ParseComments)
+	f, err := parser.ParseFile(fset, filepath.Join(curpath, "routers", "router.go"), nil, parser.ParseComments)
 	if err != nil {
 		beeLogger.Log.Fatalf("Error while parsing router.go: %s", err)
 	}
@@ -350,8 +351,8 @@ func analyseControllerPkg(vendorPath, localName, pkgpath string) {
 		pps := strings.Split(pkgpath, "/")
 		importlist[pps[len(pps)-1]] = pkgpath
 	}
-	gopath := os.Getenv("GOPATH")
-	if gopath == "" {
+	gopaths := bu.GetGOPATHs()
+	if len(gopaths) == 0 {
 		beeLogger.Log.Fatal("GOPATH environment variable is not set or empty")
 	}
 	pkgRealpath := ""
@@ -360,7 +361,7 @@ func analyseControllerPkg(vendorPath, localName, pkgpath string) {
 	if utils.FileExists(wg) {
 		pkgRealpath = wg
 	} else {
-		wgopath := filepath.SplitList(gopath)
+		wgopath := gopaths
 		for _, wg := range wgopath {
 			wg, _ = filepath.EvalSymlinks(filepath.Join(wg, "src", pkgpath))
 			if utils.FileExists(wg) {
diff --git a/utils/utils.go b/utils/utils.go
index e1fd20d..60b3d8a 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -52,6 +52,9 @@ func IsExist(path string) bool {
 // GetGOPATHs returns all paths in GOPATH variable.
 func GetGOPATHs() []string {
 	gopath := os.Getenv("GOPATH")
+	if gopath == "" && strings.Compare(runtime.Version(), "go1.8") >= 0 {
+		gopath = defaultGOPATH()
+	}
 	return filepath.SplitList(gopath)
 }
 
@@ -61,7 +64,7 @@ func IsInGOPATH(thePath string) bool {
 		thePath = filepath.ToSlash(thePath)
 	}
 	for _, gopath := range GetGOPATHs() {
-		if strings.Contains(thePath, gopath+"/src") {
+		if strings.Contains(thePath, filepath.Join(gopath, "src")) {
 			return true
 		}
 	}
@@ -425,3 +428,16 @@ func GetFileModTime(path string) int64 {
 
 	return fi.ModTime().Unix()
 }
+
+func defaultGOPATH() string {
+	env := "HOME"
+	if runtime.GOOS == "windows" {
+		env = "USERPROFILE"
+	} else if runtime.GOOS == "plan9" {
+		env = "home"
+	}
+	if home := os.Getenv(env); home != "" {
+		return filepath.Join(home, "go")
+	}
+	return ""
+}