diff --git a/parser.go b/parser.go
index 24f7549b..3bf3cf6b 100644
--- a/parser.go
+++ b/parser.go
@@ -23,7 +23,7 @@ import (
 	"go/token"
 	"io/ioutil"
 	"os"
-	"path"
+	"path/filepath"
 	"sort"
 	"strings"
 
@@ -56,8 +56,9 @@ func init() {
 }
 
 func parserPkg(pkgRealpath, pkgpath string) error {
-	rep := strings.NewReplacer("/", "_", ".", "_")
-	commentFilename = coomentPrefix + rep.Replace(pkgpath) + ".go"
+	rep := strings.NewReplacer("\\", "_", "/", "_", ".", "_")
+	commentFilename, _ = filepath.Rel(AppPath, pkgRealpath)
+	commentFilename = coomentPrefix + rep.Replace(commentFilename) + ".go"
 	if !compareFile(pkgRealpath) {
 		logs.Info(pkgRealpath + " no changed")
 		return nil
@@ -87,7 +88,7 @@ func parserPkg(pkgRealpath, pkgpath string) error {
 			}
 		}
 	}
-	genRouterCode()
+	genRouterCode(pkgRealpath)
 	savetoFile(pkgRealpath)
 	return nil
 }
@@ -130,8 +131,8 @@ func parserComments(comments *ast.CommentGroup, funcName, controllerName, pkgpat
 	return nil
 }
 
-func genRouterCode() {
-	os.Mkdir(path.Join(AppPath, "routers"), 0755)
+func genRouterCode(pkgRealpath string) {
+	os.Mkdir(getRouterDir(pkgRealpath), 0755)
 	logs.Info("generate router from comments")
 	var (
 		globalinfo string
@@ -173,7 +174,7 @@ func genRouterCode() {
 		}
 	}
 	if globalinfo != "" {
-		f, err := os.Create(path.Join(AppPath, "routers", commentFilename))
+		f, err := os.Create(filepath.Join(getRouterDir(pkgRealpath), commentFilename))
 		if err != nil {
 			panic(err)
 		}
@@ -183,7 +184,7 @@ func genRouterCode() {
 }
 
 func compareFile(pkgRealpath string) bool {
-	if !utils.FileExists(path.Join(AppPath, "routers", commentFilename)) {
+	if !utils.FileExists(filepath.Join(getRouterDir(pkgRealpath), commentFilename)) {
 		return true
 	}
 	if utils.FileExists(lastupdateFilename) {
@@ -230,3 +231,19 @@ func getpathTime(pkgRealpath string) (lastupdate int64, err error) {
 	}
 	return lastupdate, nil
 }
+
+func getRouterDir(pkgRealpath string) string {
+	dir := filepath.Dir(pkgRealpath)
+	for {
+		d := filepath.Join(dir, "routers")
+		if utils.FileExists(d) {
+			return d
+		}
+
+		if r, _ := filepath.Rel(dir, AppPath); r == "." {
+			return d
+		}
+		// Parent dir.
+		dir = filepath.Dir(dir)
+	}
+}
diff --git a/validation/validation.go b/validation/validation.go
index 2b020aa8..489dfa5e 100644
--- a/validation/validation.go
+++ b/validation/validation.go
@@ -73,6 +73,10 @@ func (e *Error) String() string {
 	return e.Message
 }
 
+// Implement Error interface.
+// Return e.String()
+func (e *Error) Error() string { return e.String() }
+
 // Result is returned from every validation method.
 // It provides an indication of success, and a pointer to the Error (if any).
 type Result struct {