网上看到一个算法，但是运行的时候出错，请大咖们帮忙，谢谢
package utils
import (
"errors"
"fmt"
"reflect"
)
func GetStructStringField(input interface{}, key string) (value string, err error) {
v, err := getStructField(input, key)
if err != nil {
return
}
value, ok := v.(string)
if !ok {
return value, errors.New("can't convert key'v to string")
}
return
}
func GetStructFloat64Field(input interface{}, key string) (value float64, err error) {
v, err := getStructField(input, key)
if err != nil {
return
}
value, ok := v.(float64)
if !ok {
return value, errors.New("can't convert key'v to float64")
}
return
}
func getStructField(input interface{}, key string) (value interface{}, err error) {
rv := reflect.ValueOf(input)
rt := reflect.TypeOf(input)
if rt.Kind() != reflect.Struct {
return value, errors.New("input must be struct")
}
keyExist := false
for i := 0; i < rt.NumField(); i++ {
curField := rv.Field(i)
if rt.Field(i).Name == key {
switch curField.Kind() {
case reflect.String, reflect.Int64, reflect.Int32, reflect.Int16, reflect.Int8, reflect.Int, reflect.Float64, reflect.Float32:
keyExist = true
value = curField.Interface()//此处出错，改成 value = curField 就可以，直接fmt.Println(value )也可以得到想要的值，但是这么改了以后，这个函数GetStructStringField中的 value, ok := v.(string) ok是false
default:
return value, errors.New("key must be int float or string")
}
}
}
if !keyExist {
return value, errors.New(fmt.Sprintf("key %s not found in %s's field", key, rt))
}
return
}
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