我如何打印(到控制台)的Id，标题，名称等，这个结构在Golang?
type Project struct {
Id int64 `json:"project_id"`
Title string `json:"title"`
Name string `json:"name"`
Data Data `json:"data"`
Commits Commits `json:"commits"`
}
当前回答
有时，将结构体打印为有效的Go代码(相当于Go /ast代码)可能会很方便。出于这个目的，https://github.com/hexops/valast做得很好:
package main
import (
"fmt"
"github.com/hexops/valast"
)
type ProjectData struct {
Title string `json:"title"`
Name string `json:"name"`
Data string `json:"data"`
Commits string `json:"commits"`
}
type Project struct {
Id int64 `json:"project_id"`
Data *ProjectData `json:"data"`
}
func main() {
p := Project{
Id: 1,
Data: &ProjectData{
Title: "Test",
Name: "Mihai",
Data: "Some data",
Commits: "Test Message",
},
}
fmt.Println(valast.String(p))
}
输出:
go run main.go
Project{Id: 1, Data: &ProjectData{
Title: "Test",
Name: "Mihai",
Data: "Some data",
Commits: "Test Message",
}}
其他回答
我建议使用json.Unmarshal() 我试着打印id，希望它有帮助:
var jsonString = `{"Id": 1, "Title": "the title", "Name": "the name","Data": "the data","Commits" : "the commits"}`
var jsonData = []byte(jsonString)
var data Project
var err = json.Unmarshal(jsonData, &data)
if err != nil {
fmt.Println(err.Error())
return
}
fmt.Println("Id :", data.Id)
您可以先执行json mashal并将其作为字符串打印。你可以看到整个struct的值。
package main
import "fmt"
import "json"
type Project struct {
Id int64 `json:"project_id"`
Title string `json:"title"`
Name string `json:"name"`
}
func main() {
o := Project{Id: 4, Name: "hello", Title: "world"}
om, _ := json.marshal(o)
log.Printf("%s\n", string(om))
}
当你有更复杂的结构时，你可能需要在打印之前转换成JSON:
// Convert structs to JSON.
data, err := json.Marshal(myComplexStruct)
fmt.Printf("%s\n", data)
来源:https://gist.github.com/tetsuok/4942960
fmt.Printf("%+v\n", project)
这是打印细节的基本方法
有时，将结构体打印为有效的Go代码(相当于Go /ast代码)可能会很方便。出于这个目的，https://github.com/hexops/valast做得很好:
package main
import (
"fmt"
"github.com/hexops/valast"
)
type ProjectData struct {
Title string `json:"title"`
Name string `json:"name"`
Data string `json:"data"`
Commits string `json:"commits"`
}
type Project struct {
Id int64 `json:"project_id"`
Data *ProjectData `json:"data"`
}
func main() {
p := Project{
Id: 1,
Data: &ProjectData{
Title: "Test",
Name: "Mihai",
Data: "Some data",
Commits: "Test Message",
},
}
fmt.Println(valast.String(p))
}
输出:
go run main.go
Project{Id: 1, Data: &ProjectData{
Title: "Test",
Name: "Mihai",
Data: "Some data",
Commits: "Test Message",
}}
