https://blog.golang.org/laws-of-reflection
用一个简单的例子说明如何在struct上使用reflect。定义一个struct，想通过标签取得该struct的值：
package main
import (
"reflect"
"fmt"
)
type ModelStruct struct {
Name string `json:"name"`
Id int64 `json:"id"`
Age int `json:"age"`
}
func FormatModelMap(needs []string, model ModelStruct) map[string]interface{} {
data := make(map[string]interface{})
structValue := reflect.ValueOf(&model;).Elem()
structType := reflect.TypeOf(model)
fmt.Println("routeType:", structType, structType.NumField())
for _, need := range needs {
fmt.Println("need", need)
for i := 0; i < structType.NumField(); i++ {
routeTypeField := structType.Field(i)
structTag := routeTypeField.Tag.Get("json")
if need == structTag {
data[need] = structValue.Field(i).Interface()
fmt.Println("structTag:", structTag, structValue.Field(i))
}
}
}
return data
}
func main() {
model := ModelStruct{Name:"baixiao", Id:888,}
needs := []string{"name", "id"}
fmt.Println(FormatModelMap(needs, model))
}
