我正在嘗試使用 golang 中的反射為任意結(jié)構(gòu)更新結(jié)構(gòu)及其子字段中的所有字符串字段，如下所示：package mainimport ( "fmt" "reflect" "strings")func main() { type Inner struct { In1 string In2 []string } type Type struct { Name string Names []string NewSt Inner } a := Type{ Name: " [ (Amir[ ", Names: nil, NewSt: Inner{ In1: " [in1", In2: []string{" [in2( "}, }, } trims(&a) fmt.Printf("%#v\n", a)}func trim(str string) string { return strings.TrimSpace(strings.Trim(str, "[](){}, "))}func trims(ps interface{}) { v := reflect.ValueOf(ps).Elem() // Elem() dereferences pointer for i := 0; i < v.NumField(); i++ { fv := v.Field(i) switch fv.Kind() { case reflect.String: fv.SetString(trim(fv.String())) case reflect.Struct: in := fv.Interface() trims(&in) } }}但我感到恐慌：反射：在結(jié)構(gòu)值錯誤上調(diào)用 reflect.Value.Elem。我該如何解決它，或者有什么更好的方法可以做到這一點？
1 回答
波斯汪
TA貢獻(xiàn)1811條經(jīng)驗 獲得超4個贊
func trims(ps interface{}) {
v := reflect.ValueOf(ps)
if v.Kind() == reflect.Ptr {
v = v.Elem() // Elem() dereferences pointer
}
if v.Kind() != reflect.Struct {
panic("not struct")
}
for i := 0; i < v.NumField(); i++ {
fv := v.Field(i)
switch fv.Kind() {
case reflect.String:
fv.SetString(trim(fv.String()))
case reflect.Struct:
// use Addr() to get an addressable
// value of the field
in := fv.Addr().Interface()
// do not use &in, that evaluates
// to *interface{}, that's almost
// NEVER what you want
trims(in)
case reflect.Slice:
if fv.Type().Elem().Kind() == reflect.String {
for i := 0; i < fv.Len(); i++ {
fv.Index(i).SetString(trim(fv.Index(i).String()))
}
}
}
}
}
https://go.dev/play/p/JkJTJzTckNA
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