Golang实现优雅的将struct转换为map

package main

import (
    "encoding/json"
    "fmt"
    "time"
)

type Person struct {
    Name    string `json:"name"`
    Address string `json:"address"`
}

func main() {
    t := time.Now().UnixNano()
    m := make(map[string]interface{})
    person := Person{
       Name:    "zhangsan",
       Address: "北京海淀",
    }
    j, _ := json.Marshal(person)
    json.Unmarshal(j, &m)
    fmt.Println(m)
    fmt.Println(fmt.Sprintf("JSON-duration:%d", time.Now().UnixNano() - t))
}

package main

import (
    "fmt"
    "reflect"
    "time"
)

type Person struct {
    Name    string `json:"name"`
    Address string `json:"address"`
}

func main() {
    t := time.Now().UnixNano()
    m := make(map[string]interface{})
    person := Person{
        Name:    "zhangsan",
        Address: "北京海淀",
    }

    elem := reflect.ValueOf(&person).Elem()
    relType := elem.Type()
    for i := 0; i < relType.NumField(); i++ {
        name := relType.Field(i).Name
        m[name] = elem.Field(i).Interface()
    }

    fmt.Println(m)
    fmt.Println(fmt.Sprintf("反射-duration:%d", time.Now().UnixNano() - t))
}

package utils

import (
    "reflect"
    "strings"
)

type IStruct interface {
    GetStructData() interface{}
}

//struct转map
//使用反射实现，完美地兼容了json标签的处理
func StructToMap(st IStruct) map[string]interface{} {
    m := make(map[string]interface{})
    in := st.GetStructData()
    val := reflect.ValueOf(in)
    if val.Kind() == reflect.Ptr {
        val = val.Elem()
    }
    if val.Kind() != reflect.Struct {
        return m
    }

    relType := val.Type()
    for i := 0; i < relType.NumField(); i++ {
        name := relType.Field(i).Name
        tag := relType.Field(i).Tag.Get("json")
        if tag != "" {
            index := strings.Index(tag, ",")
            if index == -1 {
                name = tag
            } else {
                name = tag[:index]
            }
        }
        m[name] = val.Field(i).Interface()
    }
    return m
}

package main

import (
    "fmt"
    "learn-go/utils"
    "time"
)

type Person struct {
    Name    string `json:"name"`
    Address string `json:"address"`
}

//注意：必须实现这个方法，才能正确调用工具包转换方法
func (p Person) GetStructData() interface{} {
    return p
}

func main() {
    t := time.Now().UnixNano()
    m := make(map[string]interface{})
    person := Person{
        Name:    "zhangsan",
        Address: "北京海淀",
    }

    m = utils.StructToMap(person)
    fmt.Println(m)
    fmt.Println(fmt.Sprintf("反射2-duration:%d", time.Now().UnixNano() - t))
}