golang 之进阶篇 json解析到结构体
1、json解析到结构体
示例:
package mainimport
(
"encoding/json"
"fmt"
)
type
IT
struct
{
Company string `json:
"company"
`
Subjects []string `json:
"subjects"
`
//二次编码
IsOk bool `json:
"isok"
`
Price float64 `json:
"price"
`
}
func
main() {
jsonBuf := `
{
"company"
:
"itcast"
,
"subjects"
: [
"Go"
,
"C++"
,
"Python"
,
"Test"
],
"isok"
: true,
"price"
: 666.666
}`
var
tmp IT
//定义一个结构体变量
err := json.Unmarshal([]byte(jsonBuf), &tmp)
//第二个参数要地址传递
if
err != nil {
fmt.Println(
"err = "
, err)
return
}
//fmt.Println("tmp = ", tmp)
fmt.Printf(
"tmp = %+v\n"
, tmp)
}
执行结果:
tmp = {Company:itcast Subjects:[Go C++ Python Test] IsOk:true Price:666.666}
示例2: 定义结构体,解析你想生成的字段
package mainimport
(
"encoding/json"
"fmt"
)
type
IT
struct
{
Company string `json:
"company"
`
Subjects []string `json:
"subjects"
`
//二次编码
IsOk bool `json:
"isok"
`
Price float64 `json:
"price"
`
}
func
main() {
jsonBuf := `
{
"company"
:
"itcast"
,
"subjects"
: [
"Go"
,
"C++"
,
"Python"
,
"Test"
],
"isok"
: true,
"price"
: 666.666
}`
var
tmp IT
//定义一个结构体变量
err := json.Unmarshal([]byte(jsonBuf), &tmp)
//第二个参数要地址传递
if
err != nil {
fmt.Println(
"err = "
, err)
return
}
type
IT2
struct
{
Subjects []string `json:
"subjects"
`
//二次编码
}
var
tmp2 IT2
err = json.Unmarshal([]byte(jsonBuf), &tmp2)
//第二个参数要地址传递
if
err != nil {
fmt.Println(
"err = "
, err)
return
}
fmt.Printf(
"tmp2 = %+v\n"
, tmp2)
}
执行结果:
tmp2 = {Subjects:[Go C++ Python Test]}