Golang in the struct about reflection tag

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Package Mainimport ("FMT" "reflect") type user struct {name string ' Json:name-field ' age  int}func main () {User: = &u ser{"John Doe the Fourth", 20}field, OK: = reflect. TypeOf (user). Elem (). Fieldbyname ("name") if!ok {panic ("Field not Found")}fmt. Println (Getstructtag (field))}func Getstructtag (f reflect. Structfield) string {return string (F.tag)}

Output

Json:name-field

The structure domain can be obtained directly from the reflection, and the tag in the domain can be called to get the tag to be processed. In Golang, such as the well-known Xorm package are not added to MongoDB support. It is difficult to use Golang's struct to support JSON well, most of them rely on tag. It is still very necessary to use reflection at the bottom to get tag content.