package main  import ( 	"fmt" 	"database/sql" 	_ "github.com/go-sql-driver/mysql" )  func main(){ 	db,err:=sql.Open("mysql","root:root@(127.0.0.1:3306)/djangoblog") 	if err != nil{ 		panic(err) 	} 	defer db.Close() 	if err:=db.Ping();err!=nil{ 		fmt.Println("连接失败") 		panic(err) 	} 	fmt.Println("连接成功") }