链接数据库是出现错误!报错提示。Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure, message from server: "Can't get hostname for your address"
URL地址写的有问题,检查检查。
不能获取你给的地址的主机名,用户填写不对或者格式不对