-
Notifications
You must be signed in to change notification settings - Fork 160
/
json_4.go
64 lines (52 loc) · 1.04 KB
/
json_4.go
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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
package main
import (
"encoding/json"
"fmt"
"strings"
)
type foo struct {
Name string
Age int
}
func fixedJsonUnmarshal() {
s := `{"age": 23, "name": "tony"}`
var f foo
err := json.Unmarshal([]byte(s), &f)
if err != nil {
fmt.Println("json unmarshal error:", err)
return
}
fmt.Printf("%#v\n", f)
}
func flexibleJsonUnmarshal() {
s := `{"age": 23, "name": "tony"}`
m := map[string]interface{}{}
err := json.Unmarshal([]byte(s), &m)
if err != nil {
fmt.Println("json unmarshal error:", err)
return
}
age := m["age"].(int)
fmt.Println("age =", age)
}
func flexibleJsonUnmarshalImproved() {
s := `{"age": 23, "name": "tony"}`
m := map[string]interface{}{}
d := json.NewDecoder(strings.NewReader(s))
d.UseNumber()
err := d.Decode(&m)
if err != nil {
fmt.Println("json decode error:", err)
return
}
age, err := m["age"].(json.Number).Int64()
if err != nil {
fmt.Println("json.Number.Int64 error:", err)
return
}
fmt.Println("age =", age)
}
func main() {
fixedJsonUnmarshal()
flexibleJsonUnmarshalImproved()
}