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
我建议你使用fmt。Printf("%#v\n"， s)，它将打印golang类型在同一时间
package main
import (
"fmt"
"testing"
)
type student struct {
id int32
name string
}
type Project struct {
Id int64 `json:"project_id"`
Title string `json:"title"`
Name string `json:"name"`
}
func TestPrint(t *testing.T) {
s := Project{1, "title","jack"}
fmt.Printf("%+v\n", s)
fmt.Printf("%#v\n", s)
}
结果:
{Id:1 Title:title Name:jack}
main.Project{Id:1, Title:"title", Name:"jack"}
其他回答
fmt.Println("%+v", structure variable)
更好的方法是在名为“commons”(可能)的包中为字符串“%+v”创建一个全局常量，并在代码中处处使用它
//In commons package
const STRUCTURE_DATA_FMT = "%+v"
//In your code everywhere
fmt.Println(commons.STRUCTURE_DATA_FMT, structure variable)
type Response struct {
UserId int `json:"userId"`
Id int `json:"id"`
Title string `json:"title"`
Body string `json:"body"`
}
func PostsGet() gin.HandlerFunc {
return func(c *gin.Context) {
xs, err := http.Get("https://jsonplaceholder.typicode.com/posts")
if err != nil {
log.Println("The HTTP request failed with error: ", err)
}
data, _ := ioutil.ReadAll(xs`enter code here`.Body)
// this will print the struct in console
fmt.Println(string(data))
// this is to send as response for the API
bytes := []byte(string(data))
var res []Response
json.Unmarshal(bytes, &res)
c.JSON(http.StatusOK, res)
}
}
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",
}}
我建议你使用fmt。Printf("%#v\n"， s)，它将打印golang类型在同一时间
package main
import (
"fmt"
"testing"
)
type student struct {
id int32
name string
}
type Project struct {
Id int64 `json:"project_id"`
Title string `json:"title"`
Name string `json:"name"`
}
func TestPrint(t *testing.T) {
s := Project{1, "title","jack"}
fmt.Printf("%+v\n", s)
fmt.Printf("%#v\n", s)
}
结果:
{Id:1 Title:title Name:jack}
main.Project{Id:1, Title:"title", Name:"jack"}
p = Project{...}
fmt.Printf("%+v", p)
fmt.Printf("%#v", p) //with type
