Linux Golang 打开Mysql

示例：

import "database/sql"
import _ "github.com/go-sql-driver/mysql"

db, err := sql.Open("mysql", "user:password@/dbname")

DSN (Data Source Name)

[username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]

username:password@protocol(address)/dbname?param=value