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創(chuàng)新互聯(lián)GoFrame教程：GoFrame 類型轉(zhuǎn)換-Scan轉(zhuǎn)換
前面關(guān)于復(fù)雜類型的轉(zhuǎn)換功能如果大家覺(jué)得還不夠的話，那么您可以了解下?Scan?轉(zhuǎn)換方法，該方法可以實(shí)現(xiàn)對(duì)任意參數(shù)到?struct/struct?數(shù)組?/map/map?數(shù)組的轉(zhuǎn)換，并且根據(jù)開(kāi)發(fā)者輸入的轉(zhuǎn)換目標(biāo)參數(shù)自動(dòng)識(shí)別執(zhí)行轉(zhuǎn)換。
按需搭建網(wǎng)站可以根據(jù)自己的需求進(jìn)行定制，成都網(wǎng)站設(shè)計(jì)、成都網(wǎng)站制作構(gòu)思過(guò)程中功能建設(shè)理應(yīng)排到主要部位公司成都網(wǎng)站設(shè)計(jì)、成都網(wǎng)站制作的運(yùn)用實(shí)際效果公司網(wǎng)站制作網(wǎng)站建立與制做的實(shí)際意義
該方法定義如下：
// Scan automatically calls MapToMap, MapToMaps, Struct or Structs function according to
// the type of parameter `pointer` to implement the converting.
// It calls function MapToMap if `pointer` is type of *map to do the converting.
// It calls function MapToMaps if `pointer` is type of *[]map/*[]*map to do the converting.
// It calls function Struct if `pointer` is type of *struct/**struct to do the converting.
// It calls function Structs if `pointer` is type of *[]struct/*[]*struct to do the converting.
func Scan(params interface{}, pointer interface{}, mapping ...map[string]string) (err error)我們接下來(lái)看幾個(gè)示例便可快速理解。
自動(dòng)識(shí)別轉(zhuǎn)換Struct
package main
import (
"github.com/GOgf/gf/v2/frame/g"
"github.com/gogf/gf/v2/util/gconv"
)
func main() {
type User struct {
Uid int
Name string
}
params := g.Map{
"uid": 1,
"name": "john",
}
var user *User
if err := gconv.Scan(params, &user); err != nil {
panic(err)
}
g.Dump(user)
}執(zhí)行后，輸出結(jié)果為：
{
"Name": "john",
"Uid": 1
}自動(dòng)識(shí)別轉(zhuǎn)換Struct數(shù)組
package main
import (
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/util/gconv"
)
func main() {
type User struct {
Uid int
Name string
}
params := g.Slice{
g.Map{
"uid": 1,
"name": "john",
},
g.Map{
"uid": 2,
"name": "smith",
},
}
var users []*User
if err := gconv.Scan(params, &users); err != nil {
panic(err)
}
g.Dump(users)
}執(zhí)行后，終端輸出：
[
{
"Uid": 1,
"Name": "john"
},
{
"Uid": 2,
"Name": "smith"
}
]自動(dòng)識(shí)別轉(zhuǎn)換Map
package main
import (
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/util/gconv"
)
func main() {
var (
user map[string]string
params = g.Map{
"uid": 1,
"name": "john",
}
)
if err := gconv.Scan(params, &user); err != nil {
panic(err)
}
g.Dump(user)
}執(zhí)行后，輸出結(jié)果為：
{
"Uid": "1",
"Name": "john"
}自動(dòng)識(shí)別轉(zhuǎn)換Map數(shù)組
package main
import (
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/util/gconv"
)
func main() {
var (
users []map[string]string
params = g.Slice{
g.Map{
"uid": 1,
"name": "john",
},
g.Map{
"uid": 2,
"name": "smith",
},
}
)
if err := gconv.Scan(params, &users); err != nil {
panic(err)
}
g.Dump(users)
}執(zhí)行后，輸出結(jié)果為：
[
{
"name": "john",
"uid": "1"
},
{
"name": "smith",
"uid": "2"
}
]本文標(biāo)題：創(chuàng)新互聯(lián)GoFrame教程：GoFrame 類型轉(zhuǎn)換-Scan轉(zhuǎn)換
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