golang 之進階篇 json解析到結構體
阿新 • • 發佈：2020-10-16
1、json解析到結構體
示例：
package mainimport(
"encoding/json"
"fmt"
)
typeIT struct{
Company string `json:"company"`
Subjects []string `json:"subjects"` //二次編碼
IsOk bool `json:"isok"`
Price float64 `json:"price"`
}
funcmain() {
jsonBuf := `
{
"company": "itcast",
"subjects": [
"Go",
"C++",
"Python",
"Test"
],
"isok": true,
"price": 666.666
}`
vartmp IT //定義一個結構體變數
err := json.Unmarshal([]byte(jsonBuf), &tmp) //第二個引數要地址傳遞
iferr != nil {
fmt.Println("err = ", err)
return
}
//fmt.Println("tmp = ", tmp)
fmt.Printf("tmp = %+v\n", tmp)
}
執行結果：
tmp = {Company:itcast Subjects:[Go C++ Python Test] IsOk:true Price:666.666}示例2： 定義結構體，解析你想生成的欄位
package mainimport(
"encoding/json"
"fmt"
)
typeITstruct{
Company string `json:"company"`
Subjects []string `json:"subjects"`//二次編碼
IsOk bool `json:"isok"`
Price float64 `json:"price"`
}
funcmain() {
jsonBuf := `
{
"company":"itcast",
"subjects": [
"Go",
"C++",
"Python",
"Test"],
"isok": true,
"price": 666.666
}`
vartmp IT//定義一個結構體變數
err := json.Unmarshal([]byte(jsonBuf), &tmp)//第二個引數要地址傳遞
iferr != nil {
fmt.Println("err = ", err)
return
}
typeIT2struct{
Subjects []string `json:"subjects"`//二次編碼
}
vartmp2 IT2
err = json.Unmarshal([]byte(jsonBuf), &tmp2)//第二個引數要地址傳遞
iferr != nil {
fmt.Println("err = ", err)
return
}
fmt.Printf("tmp2 = %+v\n", tmp2)
}
執行結果:
tmp2 = {Subjects:[Go C++ Python Test]}