diff --git a/tools/goctl/api/dartgen/genapi.go b/tools/goctl/api/dartgen/genapi.go
index 067d609f7f7c..4c988431cb45 100644
--- a/tools/goctl/api/dartgen/genapi.go
+++ b/tools/goctl/api/dartgen/genapi.go
@@ -4,7 +4,6 @@ import (
 	"os"
 	"text/template"
 
-	"github.com/tal-tech/go-zero/core/logx"
 	"github.com/tal-tech/go-zero/tools/goctl/api/spec"
 )
 
@@ -30,33 +29,30 @@ Future {{pathToFuncName .Path}}( {{if ne .Method "get"}}{{with .RequestType}}{{.
 {{end}}`
 
 func genApi(dir string, api *spec.ApiSpec) error {
-	e := os.MkdirAll(dir, 0755)
-	if e != nil {
-		logx.Error(e)
-		return e
+	err := os.MkdirAll(dir, 0755)
+	if err != nil {
+		return err
 	}
-	e = genApiFile(dir)
-	if e != nil {
-		logx.Error(e)
-		return e
+
+	err = genApiFile(dir)
+	if err != nil {
+		return err
 	}
 
-	file, e := os.OpenFile(dir+api.Info.Title+".dart", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-	if e != nil {
-		logx.Error(e)
-		return e
+	file, err := os.OpenFile(dir+api.Service.Name+".dart", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
 	}
-	defer file.Close()
 
+	defer file.Close()
 	t := template.New("apiTemplate")
 	t = t.Funcs(funcMap)
-	t, e = t.Parse(apiTemplate)
-	if e != nil {
-		logx.Error(e)
-		return e
+	t, err = t.Parse(apiTemplate)
+	if err != nil {
+		return err
 	}
-	t.Execute(file, api)
-	return nil
+
+	return t.Execute(file, api)
 }
 
 func genApiFile(dir string) error {
@@ -64,12 +60,12 @@ func genApiFile(dir string) error {
 	if fileExists(path) {
 		return nil
 	}
-	apiFile, e := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-	if e != nil {
-		logx.Error(e)
-		return e
+	apiFile, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
 	}
+
 	defer apiFile.Close()
-	apiFile.WriteString(apiFileContent)
-	return nil
+	_, err = apiFile.WriteString(apiFileContent)
+	return err
 }
diff --git a/tools/goctl/api/dartgen/gendata.go b/tools/goctl/api/dartgen/gendata.go
index a4d0dbd869bc..ebaca72a4377 100644
--- a/tools/goctl/api/dartgen/gendata.go
+++ b/tools/goctl/api/dartgen/gendata.go
@@ -4,7 +4,6 @@ import (
 	"os"
 	"text/template"
 
-	"github.com/tal-tech/go-zero/core/logx"
 	"github.com/tal-tech/go-zero/tools/goctl/api/spec"
 )
 
@@ -33,30 +32,27 @@ class {{.Name}}{
 `
 
 func genData(dir string, api *spec.ApiSpec) error {
-	e := os.MkdirAll(dir, 0755)
-	if e != nil {
-		logx.Error(e)
-		return e
+	err := os.MkdirAll(dir, 0755)
+	if err != nil {
+		return err
 	}
-	e = genTokens(dir)
-	if e != nil {
-		logx.Error(e)
-		return e
+
+	err = genTokens(dir)
+	if err != nil {
+		return err
 	}
 
-	file, e := os.OpenFile(dir+api.Info.Title+".dart", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-	if e != nil {
-		logx.Error(e)
-		return e
+	file, err := os.OpenFile(dir+api.Service.Name+".dart", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
 	}
 	defer file.Close()
 
 	t := template.New("dataTemplate")
 	t = t.Funcs(funcMap)
-	t, e = t.Parse(dataTemplate)
-	if e != nil {
-		logx.Error(e)
-		return e
+	t, err = t.Parse(dataTemplate)
+	if err != nil {
+		return err
 	}
 
 	return t.Execute(file, api)
@@ -67,12 +63,13 @@ func genTokens(dir string) error {
 	if fileExists(path) {
 		return nil
 	}
-	tokensFile, e := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
-	if e != nil {
-		logx.Error(e)
-		return e
+
+	tokensFile, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
 	}
+
 	defer tokensFile.Close()
-	tokensFile.WriteString(tokensFileContent)
-	return nil
+	_, err = tokensFile.WriteString(tokensFileContent)
+	return err
 }
diff --git a/tools/goctl/api/dartgen/genvars.go b/tools/goctl/api/dartgen/genvars.go
index a720ec47d803..01bfa3a88242 100644
--- a/tools/goctl/api/dartgen/genvars.go
+++ b/tools/goctl/api/dartgen/genvars.go
@@ -3,27 +3,9 @@ package dartgen
 import (
 	"io/ioutil"
 	"os"
-
-	"github.com/tal-tech/go-zero/core/logx"
 )
 
-func genVars(dir string) error {
-	e := os.MkdirAll(dir, 0755)
-	if e != nil {
-		logx.Error(e)
-		return e
-	}
-
-	if !fileExists(dir + "vars.dart") {
-		e = ioutil.WriteFile(dir+"vars.dart", []byte(`const serverHost='demo-crm.xiaoheiban.cn';`), 0644)
-		if e != nil {
-			logx.Error(e)
-			return e
-		}
-	}
-
-	if !fileExists(dir + "kv.dart") {
-		e = ioutil.WriteFile(dir+"kv.dart", []byte(`import 'dart:convert';
+const varTemplate = `import 'dart:convert';
 import 'package:shared_preferences/shared_preferences.dart';
 import '../data/tokens.dart';
 
@@ -56,10 +38,25 @@ Future<Tokens> getTokens() async {
     return null;
   }
 }
-`), 0644)
-		if e != nil {
-			logx.Error(e)
-			return e
+`
+
+func genVars(dir string) error {
+	err := os.MkdirAll(dir, 0755)
+	if err != nil {
+		return err
+	}
+
+	if !fileExists(dir + "vars.dart") {
+		err = ioutil.WriteFile(dir+"vars.dart", []byte(`const serverHost='demo-crm.xiaoheiban.cn';`), 0644)
+		if err != nil {
+			return err
+		}
+	}
+
+	if !fileExists(dir + "kv.dart") {
+		err = ioutil.WriteFile(dir+"kv.dart", []byte(varTemplate), 0644)
+		if err != nil {
+			return err
 		}
 	}
 	return nil
diff --git a/tools/goctl/api/dartgen/util.go b/tools/goctl/api/dartgen/util.go
index 833fff4d78ad..dab2d416acaf 100644
--- a/tools/goctl/api/dartgen/util.go
+++ b/tools/goctl/api/dartgen/util.go
@@ -12,6 +12,7 @@ func lowCamelCase(s string) string {
 	if len(s) < 1 {
 		return ""
 	}
+
 	s = util.ToCamelCase(util.ToSnakeCase(s))
 	return util.ToLower(s[:1]) + s[1:]
 }
diff --git a/tools/goctl/api/dartgen/vars.go b/tools/goctl/api/dartgen/vars.go
index 864126cbfe38..78f95e1fc3ff 100644
--- a/tools/goctl/api/dartgen/vars.go
+++ b/tools/goctl/api/dartgen/vars.go
@@ -11,7 +11,8 @@ var funcMap = template.FuncMap{
 	"lowCamelCase":    lowCamelCase,
 }
 
-const apiFileContent = `import 'dart:io';
+const (
+	apiFileContent = `import 'dart:io';
 import 'dart:convert';
 import '../vars/kv.dart';
 import '../vars/vars.dart';
@@ -97,7 +98,8 @@ Future _apiRequest(String method, String path, dynamic data,
   if (eventually != null) eventually();
 }
 `
-const tokensFileContent = `class Tokens {
+
+	tokensFileContent = `class Tokens {
   /// 用于访问的token, 每次请求都必须带在Header里面
   final String accessToken;
   final int accessExpire;
@@ -131,3 +133,4 @@ const tokensFileContent = `class Tokens {
   }
 }
 `
+)