fix issue in gconv.Struct when given atrr of struct is nil time.Time

g/os/gtime/gtime_time.go

@@ -62,6 +62,9 @@ func NewFromStrLayout (str string, layout string) *Time {
 
 // 时间戳转换为时间对象，时间戳支持到纳秒的数值
 func NewFromTimeStamp (timestamp int64) *Time {
+    if timestamp == 0 {
+        return &Time {}
+    }
     for timestamp < 1e18 {
         timestamp *= 10
     }

g/util/gconv/gconv_time.go

@@ -25,6 +25,9 @@ func TimeDuration(i interface{}) time.Duration {
 // 将变量i转换为time.Time类型
 func GTime(i interface{}, format...string) *gtime.Time {
     s := String(i)
+    if len(s) == 0 {
+        return gtime.New()
+    }
     // 优先使用用户输入日期格式进行转换
     if len(format) > 0 {
         t, _ := gtime.StrToTimeFormat(s, format[0])

g/util/gstr/gstr.go

@@ -96,6 +96,10 @@ func IsLetterUpper(b byte) bool {
 
 // 判断锁给字符串是否为数字
 func IsNumeric(s string) bool {
+    length := len(s)
+    if length == 0 {
+        return false
+    }
     for i := 0; i < len(s); i++ {
         if s[i] < byte('0') || s[i] > byte('9') {
             return false

geg/other/test2.go

@@ -1,22 +1,19 @@
 package main
 
 import (
-    "container/list"
-    "gitee.com/johng/gf/g/os/glog"
+    "fmt"
+    "gitee.com/johng/gf/g/util/gconv"
     "time"
 )
 
 func main(){
-    list := list.New()
-    glog.Println("start1")
-    for i := 0; i < 10000000; i++ {
-        list.PushBack(i)
+    type Test struct {
+        Date time.Time `json:"date"`
     }
-    glog.Println("end1")
-
-    glog.Println("start2")
-    for e := list.Front(); e != nil; e = e.Next() {
-        time.Sleep(25*time.Nanosecond)
+    o := new(Test)
+    m := map[string]interface{}{
+        "Date" : "",
     }
-    glog.Println("end2")
+    gconv.Struct(m, o)
+    fmt.Println(o)
 }