mysql - 远程mySQL访问出错

Question

我正在尝试远程访问 mySQL 服务器。这是我使用的代码。

 Connection conn = null; 
    try 
    { 
       String url = "jdbc:mysql://172.18.227.237:3306/struts2"; 
       Class.forName ("com.mysql.jdbc.Driver"); 
       conn = DriverManager.getConnection (url,"root","admin"); 
       System.out.println ("Database connection established"); 
    } 

但我收到以下错误:

 com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Access denied for user 'root'@'172.20.169.174' to database 'struts2'
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1026)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:910)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3923)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1273)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:298)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.Connect.main(Connect.java:17)

我已被授予访问我的 IP 的权限，但仍然出现错误。

Answer 1

在该 IP 上授予 root 访问权限后，您是否刷新了权限？权限在被 MySQL 引擎加载之前不会起作用，因此您必须发出“FLUSH PRIVILEGES”命令。