MysqL的root用户不允许远程连接

今天程序报了异常：java.sql.SQLException: Access denied for user 'root'@'RJB-Z' (using passwrod)。

String url ="jdbc:mysql://192.168.1.169:3306/test“;

密码没错的，在命令行窗口都能登进去。上网查了下发现是因为root用户不允许远程连接，我在这个网站（http://xucons.javaeye.com/blog/278581）找到了解决方法：改表或者赋权。http://xucons.javaeye.com/blog/278581

如果你连接mysql的时候发生这个错误：

ERROR 1130: Host '192.168.1.3' is not allowed to connect to this MySQL server

以下是引用内容：
ERROR 1130: Host '192.168.1.3' is not allowed to connect to this MySQL server

 

解决方法：
1。 改表法。

可能是你的帐号不允许从远程登陆，只能在localhost。这个时候只要在localhost的那台电脑，登入mysql后，更改 "mysql" 数据库里的 "user" 表里的 "host" 项，从"localhost"改称"%"

mysql -u root -p
mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;

mysql -u root -p
mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;

2. 授权法。

例如，你想myuser使用mypassword从任何主机连接到mysql服务器的话。

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

 如果你想允许用户myuser从ip为192.168.1.3的主机连接到mysql服务器，并使用mypassword作为密码

GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;