用戶名和密碼都正確，總是出現下面問題，誰可以幫忙解決啊，謝謝
Could not obtain connection to query metadata : Access denied for user ''@'localhost' (using password: YES)
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Could not obtain connection to query metadata : Access denied for user ''@'localhost' (using password: YES)
舉報
2017-07-18
1，驅動配置有誤：driver=com.MySQL.jdbc.Driver
2，數據庫連接地址有誤：url=jdbc:mysql://localhost:3306/test?3useUnicode=true&characterEncoding=utf8
3，密碼或帳號有誤：username=root ? ? ? ? ??password=root
4，數據庫未啟動或無權訪問
5，項目未引入對應的驅動jar包mysql-connector-Java-5.x.x-bin.jar
6,mysql root沒有遠程訪問的權限，需要增加權限，增加權限的步驟如下：
進入mysql數據庫：
grant all privileges on *.* to 'root'@'%' identified by 'root' with grant option;
flush privileges;