java.sql.SQLException: null, message from server: "Host 'xxx' is not allowed to connect to this MySQL server"

java.sql.SQLException: null,  message from server: "Host 'xxx' is not allowed to connect to this MySQL server"：

表示該對象不是遠程對象，不能通過該對象遠程訪問數據

解決：

方案一：改表：

use mysql ;select user,host,password from user;

update user set host = '%' where user='root';

方案二：授權法：

例如，你想myuser使用mypassword從任何主機連接到mysql服務器的話。 
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION; 
如果你想允許用戶myuser從ip為192.168.1.3的主機連接到mysql服務器，並使用mypassword作為密碼 
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

 

需要重啟mysql數據庫。