optimize exception bug: when user defined exception, it can use unknownexception
diff --git a/go.mod b/go.mod
index fb0a269..0060e17 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,7 @@
 module github.com/apache/dubbo-go-hessian2
 
+go 1.14
+
 require (
 	github.com/dubbogo/gost v1.9.0
 	github.com/pkg/errors v0.9.1
diff --git a/java_exception/exception.go b/java_exception/exception.go
index 30515ef..f5a00e9 100644
--- a/java_exception/exception.go
+++ b/java_exception/exception.go
@@ -90,9 +90,9 @@
 	return e.StackTrace
 }
 
-////////////////////////////
+/////////////////////////////
 // StackTraceElement
-////////////////////////////
+/////////////////////////////
 
 type StackTraceElement struct {
 	DeclaringClass string
@@ -121,4 +121,4 @@
 
 func (Class) JavaClassName() string {
 	return "java.lang.Class"
-}
\ No newline at end of file
+}
diff --git a/java_unknown_exception_test.go b/java_unknown_exception_test.go
index fa14ed3..ea24321 100644
--- a/java_unknown_exception_test.go
+++ b/java_unknown_exception_test.go
@@ -18,9 +18,11 @@
 package hessian
 
 import (
-	"github.com/stretchr/testify/assert"
 	"testing"
 )
+import (
+	"github.com/stretchr/testify/assert"
+)
 
 func TestCheckAndGetException(t *testing.T) {
 	clazzInfo1 := classInfo{
diff --git a/list.go b/list.go
index 57aaa96..8d2dba5 100644
--- a/list.go
+++ b/list.go
@@ -18,6 +18,7 @@
 package hessian
 
 import (
+	"github.com/apache/dubbo-go-hessian2/java_exception"
 	"io"
 	"reflect"
 	"strconv"
@@ -30,10 +31,6 @@
 	perrors "github.com/pkg/errors"
 )
 
-import (
-	"github.com/apache/dubbo-go-hessian2/java_exception"
-)
-
 var (
 	listTypeNameMapper = &sync.Map{}
 	listTypeMapper     = map[string]reflect.Type{
@@ -50,7 +47,8 @@
 		"date":             reflect.TypeOf(time.Time{}),
 		"object":           reflect.TypeOf([]Object{}).Elem(),
 		"java.lang.Object": reflect.TypeOf([]Object{}).Elem(),
-		// exception field
+
+		// exception field StackTraceElement
 		"java.lang.StackTraceElement": reflect.TypeOf([]*java_exception.StackTraceElement{}).Elem(),
 	}
 )
diff --git a/object.go b/object.go
index 2a86820..558a427 100644
--- a/object.go
+++ b/object.go
@@ -548,8 +548,9 @@
 	cls = d.classInfoList[idx]
 	s, ok = getStructInfo(cls.javaName)
 	if !ok {
+
 		// exception
-		if s , ok = checkAndGetException(cls); ok {
+		if s, ok = checkAndGetException(cls); ok {
 			return s.typ, cls, nil
 		}
 		if !d.isSkip {