Golang Series
Hello GoLang: https://blog.yexca.net/archives/154
GoLang (var and const) 变量与常量: https://blog.yexca.net/archives/155
GoLang (func) 函数: https://blog.yexca.net/archives/156
GoLang (slice and map) 切片: https://blog.yexca.net/archives/160
GoLang (OOP) 面向对象: https://blog.yexca.net/archives/162
GoLang (reflect) 反射: https://blog.yexca.net/archives/204
GoLang (struct tag) 结构体标签: This Page
GoLang (goroutine) go 程: https://blog.yexca.net/archives/206
GoLang (channel) 通道: https://blog.yexca.net/archives/207
通过结构体标签可以描述该类在某包的作用
获取标签值
通过 ` 来定义 tag (markdown 代码块的键)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
package main
import (
"fmt"
"reflect"
)
type User struct {
// 多个tag用空格隔离
name string `doc:"name" info:"nameOfUser"`
age int `info:"ageOfUser"`
}
func main() {
user := User{"zhangSan", 18}
findTag(&user)
}
func findTag(input interface{}) {
t := reflect.TypeOf(input).Elem()
for i := 0; i < t.NumField(); i++ {
tagInfo := t.Field(i).Tag.Get("info")
tagDoc := t.Field(i).Tag.Get("doc")
fmt.Println("info:", tagInfo, "doc:", tagDoc)
}
}
JSON 转换
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
package main
import (
"encoding/json"
"fmt"
)
type User struct {
// 注意要是公有属性才可转换json
Name string `json:"name"`
Age int `json:"age"`
}
func main() {
user := User{"zhangSan", 18}
// struct --> json
jsonStr, err := json.Marshal(user)
if err != nil {
fmt.Println("error", err)
} else {
fmt.Printf("jsonStr : %s\n", jsonStr)
}
// json --> struct
var user2 User
err = json.Unmarshal(jsonStr, &user2)
if err != nil {
fmt.Println("error", err)
} else {
fmt.Println(user2)
}
}