當我解組 json 數組時出現問題。我該如何糾正？代碼是：http : //play.golang.org/p/AtU9q8Hlyepackage mainimport (    "encoding/json"    "fmt")type Server struct {    ServerName string    ServerIP   string}type Serverslice struct {    Name    string    Servers []Server}func main() {    var s []Serverslice    str := `{"name":"dxh","servers":[{"serverName":"VPN0","serverIP":"127.0.0.1"},{"serverName":"Beijing_VPN","serverIP":"127.0.0.2"}],        "name":"dxh1,"servers":[{"serverName":"VPN1","serverIP":"127.0.0.1"},{"serverName":"Beijing_VPN","serverIP":"127.0.0.2"}]}`    json.Unmarshal([]byte(str), &s) //the wrong line.....................    fmt.Println(len(s))}