为Map<中的结构赋值字段..，struct>将删除未指定的值

package main

import (
    "fmt"
    "reflect"
)

type Person struct {
    Name    string
    Age     int
    Address string
}

func main() {
    data := map[string]interface{}{
        "Name": "John",
        "Age":  30,
    }

    person := Person{
        Name:    "Default",
        Age:     0,
        Address: "Unknown",
    }

    // 使用反射给结构体赋值
    for key, value := range data {
        field := reflect.ValueOf(&person).Elem().FieldByName(key)
        if field.IsValid() && field.CanSet() {
            field.Set(reflect.ValueOf(value))
        }
    }

    fmt.Println(person)
}

{John 30 Unknown}