JavaWeb项目，连接mysql数据库之后报出这个错误

Question

JavaWeb项目，连接mysql数据库之后报出这个错误，在CentOS6.5系统下创建的项目，root用户下创建的数据库，没有设置密码

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

Answer 1

String url = "jdbc:mysql://127.0.0.1:3306/test";
把之前localhost改为127.0.0.1就好了