好吧，我不确定，但可能是mysql安装目录中的my.cnf文件是罪魁祸首。 注释掉这一行，问题就可以解决了。

bind-address = 127.0.0.1

MySQL account names consist of a user name and a host name, The name 'localhost' in host name indicates the local host also You can use the wildcard characters “%” and “_” in host name or IP address values. These have the same meaning as for pattern-matching operations performed with the LIKE operator. For example, a host value of '%' matches any host name, whereas a value of '%.mysql.com' matches any host in the mysql.com domain. '192.168.1.%' matches any host in the 192.168.1 class C network.

以上只是介绍:

实际上，用户“bill”@“localhost”和“bill”@“%”是不同的MySQL帐户，因此两者都应该使用自己的身份验证细节，如密码。

欲了解更多信息，请参阅http://dev.mysql.com/doc/refman//5.5/en/account-names.html

我为自己找到的最好的解决办法是。

我的用户是声纳，每当我试图从外部或其他机器连接到我的数据库，我得到错误

ERROR 1045 (28000): Access denied for user 'sonar'@'localhost' (using password: YES)

此外，我正在尝试从另一台机器和通过詹金斯工作我的URL访问是

alm-lt-test.xyz.com

如果你想远程连接，你可以用以下不同的方式指定它:

mysql -u sonar -p -halm-lt-test.xyz.com
mysql -u sonar -p -h101.33.65.94
mysql -u sonar -p -h127.0.0.1 --protocol=TCP
mysql -u sonar -p -h172.27.59.54 --protocol=TCP

要访问这个URL，你只需要执行以下查询。

GRANT ALL ON sonar.* TO 'sonar'@'localhost' IDENTIFIED BY 'sonar';
GRANT ALL ON sonar.* TO 'sonar'@'alm-lt-test.xyz.com' IDENTIFIED BY 'sonar';
GRANT ALL ON sonar.* TO 'sonar'@'127.0.0.1' IDENTIFIED BY 'sonar';
GRANT ALL ON sonar.* TO 'sonar'@'172.27.59.54' IDENTIFIED BY 'sonar';

如果您忘记密码或想修改密码。你可以遵循以下步骤:

1 :stop your mysql [root@maomao ~]# service mysqld stop Stopping MySQL: [ OK ] 2 :use “--skip-grant-tables” to restart mysql [root@mcy400 ~]# mysqld_safe --skip-grant-tables [root@cy400 ~]# Starting mysqld daemon with databases from /var/lib/mysql 3 : open a new window and input mysql -u root [root@cy400 ~]# mysql -u root Welcome to the MySQL monitor. Commands end with ; or \g. 4 : change the user database mysql> use mysql Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed 5 : modify your password your new password should be input in "（）" mysql> update user set password=password('root123') where user='root'; Query OK, 3 rows affected (0.00 sec) Rows matched: 3 Changed: 3 Warnings: 0 6 : flush mysql> flush privileges; 7: quit mysql> quit Bye 8: restart mysql [root@cy400 ~]# service mysqld restart; Stopping MySQL: [ OK ] Starting MySQL: [ OK ]

宾果!你可以用用户名和新密码连接你的数据库:

[root@cy400 ~]# mysql -u root -p <br>
Enter password: admin123 <br>
Welcome to the MySQL monitor.  Commands end with ; or \g. <br>
Your MySQL connection id is 2 <br>
Server version: 5.0.77 Source distribution <br>
Type 'help;' or '\h' for help. Type '\c' to clear the buffer. <br>
mysql> quit <br>
Bye

我遇到了同样的错误。失败的设置如下:

define("HOSTNAME", "localhost");
define("HOSTUSER", "van");
define("HOSTPASS", "helsing");
define("DBNAME", "crossbow");
$connection = mysqli_connect(HOSTNAME, HOSTUSER, HOSTPASS);

下面编辑的设置是让它工作的一个。注意到区别了吗?

define('HOSTNAME', 'localhost');
define('HOSTUSER', 'van');
define('HOSTPASS', 'helsing');
define('DBNAME', 'crossbow');
$connection = mysqli_connect(HOSTNAME, HOSTUSER, HOSTPASS);

区别在于双引号。与Java相比，它们在PHP中似乎相当重要，它们在转义字符、设置url以及现在向函数传递参数时都有影响。它们更漂亮(我知道)，但总是尽可能多地使用单引号，如果必要的话，可以在其中嵌套双引号。

当我在Linux机器上而不是Windows环境上测试应用程序时，出现了这个错误。

这是以下两者之间的区别:

CREATE USER 'bill'@'%' IDENTIFIED BY 'passpass';

and

CREATE USER 'bill'@'localhost' IDENTIFIED BY 'passpass';

检查:

mysql> select user,host from mysql.user;
+---------------+----------------------------+
| user          | host                       |
+---------------+----------------------------+
| bill          | %                          | <=== created by first
| root          | 127.0.0.1                  |
| root          | ::1                        |
| root          | localhost                  |
| bill          | localhost                  | <=== created by second
+---------------+----------------------------+

命令

mysql -u bill -p

隐式访问'bill'@'localhost'，而不是'bill'@'%'。

“bill”@“localhost”没有权限

你会得到错误:

ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)

解决问题:

CREATE USER 'bill'@'localhost' IDENTIFIED BY 'passpass';

grant all privileges on . to 'bill'@'localhost' with grant option;