title: how to convert interface{} to object in golang?
body: <pre><code>type Human struct {
       Name string
  }
  
  func (t *Human) GetInfo() {
      fmt.Println(t.Name)
  }
  
  func main() {
      var p1 interface{}
      p1 = Human{Name:"John"}
      //p1.GetInfo() 
  }
  </code></pre>
  
  <p>now,p1's typs is interface{}, but i want get a Human object. </p>
  
  <p>How to do? i can call p1.GetInfo()</p>