将 HTTP Form 数据加载到 Go 结构体的通用方法

package main

import (
    "fmt"
    "reflect"
    "strconv"
)

// LoadModel 将 form 数据加载到结构体中
func LoadModel(obj interface{}, m map[string][]string) error {
    val := reflect.ValueOf(obj).Elem()
    typeOfT := val.Type()

    for i := 0; i < val.NumField(); i++ {
        field := val.Field(i)
        fieldType := typeOfT.Field(i)
        fieldName := fieldType.Name

        // 检查 form 数据中是否存在对应的字段
        if values, ok := m[fieldName]; ok {
            if len(values) > 0 {
                value := values[0] // 假设只取第一个值

                // 根据字段类型进行转换
                switch field.Kind() {
                case reflect.Int:
                    intValue, err := strconv.Atoi(value)
                    if err != nil {
                        return fmt.Errorf("无法将 %s 转换为 int: %w", value, err)
                    }
                    field.SetInt(int64(intValue))
                case reflect.String:
                    field.SetString(value)
                // 可以添加更多类型处理
                default:
                    return fmt.Errorf("不支持的字段类型: %s", field.Kind())
                }
            }
        }
    }

    return nil
}

func main() {
    type Person struct {
        Age   int
        Name  string
        Email string
    }

    m := map[string][]string{
        "Age":   {"20"},
        "Name":  {"John Smith"},
        "Email": {"john.smith@example.com"},
    }

    p := Person{}
    err := LoadModel(&p, m)
    if err != nil {
        fmt.Println("加载失败:", err)
        return
    }

    fmt.Printf("%+v\n", p) // 输出: {Age:20 Name:John Smith}
}

go get github.com/gorilla/schema

package main

import (
    "fmt"
    "net/url"

    "github.com/gorilla/schema"
)

type Person struct {
    Age   int    `schema:"Age"`
    Name  string `schema:"Name"`
    Email string `schema:"Email"`
}

func main() {
    form := url.Values{
        "Age":   {"20"},
        "Name":  {"John Smith"},
        "Email": {"john.smith@example.com"},
    }

    var person Person
    decoder := schema.NewDecoder()
    err := decoder.Decode(&person, form)
    if err != nil {
        fmt.Println("解码失败:", err)
        return
    }

    fmt.Printf("%+v\n", person) // 输出: {Age:20 Name:John Smith Email:john.smith@example.com}
}