使用JDBC連接到MySQL時訪問被拒絕

Question

此問題有幾處發生，但沒有答案提供有關如何修復或診斷問題的信息。 我有使用MySQL JDBC連接到MySQL數據庫我的本地服務器上的一個簡單的Java應用程序：

String url = "jdbc:mysql://localhost:3306/dbName"; 
    String userName = "parser"; 
    String password = "123"; 
    try { 
     Connection conn = DriverManager.getConnection(url,userName, password); 
    } catch (SQLException e1) { 
     e1.printStackTrace(); 
    } 

但是，Java拋出一個異常：

java.sql.SQLException: Access denied for user 'parser'@'localhost' (using password: YES) 

許多疑難呈三角問題建議用戶有connetction沒有特權，但在我的情況下，它具有：

+---------------------------------------------------------------+ 
| Grants for parser@%           | 
+---------------------------------------------------------------+ 
| GRANT ALL PRIVILEGES ON *.* TO 'parser'@'%' WITH GRANT OPTION | 
+---------------------------------------------------------------+ 

任何一個可以給我解釋一下爲什麼會這樣，如何診斷或理解問題是什麼？

更新1： 權限MySQL用戶

+--------------------------+---------------+-------------------------+--------------+ 
| GRANTEE     | TABLE_CATALOG | PRIVILEGE_TYPE   | IS_GRANTABLE | 
+--------------------------+---------------+-------------------------+--------------+ 
| 'root'@'localhost'  | def   | SELECT     | YES   | 
| 'root'@'localhost'  | def   | INSERT     | YES   | 
| 'root'@'localhost'  | def   | UPDATE     | YES   | 
| 'root'@'localhost'  | def   | DELETE     | YES   | 
| 'root'@'localhost'  | def   | CREATE     | YES   | 
| 'root'@'localhost'  | def   | DROP     | YES   | 
| 'root'@'localhost'  | def   | RELOAD     | YES   | 
| 'root'@'localhost'  | def   | SHUTDOWN    | YES   | 
| 'root'@'localhost'  | def   | PROCESS     | YES   | 
| 'root'@'localhost'  | def   | FILE     | YES   | 
| 'root'@'localhost'  | def   | REFERENCES    | YES   | 
| 'root'@'localhost'  | def   | INDEX     | YES   | 
| 'root'@'localhost'  | def   | ALTER     | YES   | 
| 'root'@'localhost'  | def   | SHOW DATABASES   | YES   | 
| 'root'@'localhost'  | def   | SUPER     | YES   | 
| 'root'@'localhost'  | def   | CREATE TEMPORARY TABLES | YES   | 
| 'root'@'localhost'  | def   | LOCK TABLES    | YES   | 
| 'root'@'localhost'  | def   | EXECUTE     | YES   | 
| 'root'@'localhost'  | def   | REPLICATION SLAVE  | YES   | 
| 'root'@'localhost'  | def   | REPLICATION CLIENT  | YES   | 
| 'root'@'localhost'  | def   | CREATE VIEW    | YES   | 
| 'root'@'localhost'  | def   | SHOW VIEW    | YES   | 
| 'root'@'localhost'  | def   | CREATE ROUTINE   | YES   | 
| 'root'@'localhost'  | def   | ALTER ROUTINE   | YES   | 
| 'root'@'localhost'  | def   | CREATE USER    | YES   | 
| 'root'@'localhost'  | def   | EVENT     | YES   | 
| 'root'@'localhost'  | def   | TRIGGER     | YES   | 
| 'root'@'localhost'  | def   | CREATE TABLESPACE  | YES   | 
| 'mysql.sys'@'localhost' | def   | USAGE     | NO   | 
| 'parser'@'127.0.0.1'  | def   | SELECT     | YES   | 
| 'parser'@'127.0.0.1'  | def   | INSERT     | YES   | 
| 'parser'@'127.0.0.1'  | def   | UPDATE     | YES   | 
| 'parser'@'127.0.0.1'  | def   | DELETE     | YES   | 
| 'parser'@'127.0.0.1'  | def   | CREATE     | YES   | 
| 'parser'@'127.0.0.1'  | def   | DROP     | YES   | 
| 'parser'@'127.0.0.1'  | def   | RELOAD     | YES   | 
| 'parser'@'127.0.0.1'  | def   | SHUTDOWN    | YES   | 
| 'parser'@'127.0.0.1'  | def   | PROCESS     | YES   | 
| 'parser'@'127.0.0.1'  | def   | FILE     | YES   | 
| 'parser'@'127.0.0.1'  | def   | REFERENCES    | YES   | 
| 'parser'@'127.0.0.1'  | def   | INDEX     | YES   | 
| 'parser'@'127.0.0.1'  | def   | ALTER     | YES   | 
| 'parser'@'127.0.0.1'  | def   | SHOW DATABASES   | YES   | 
| 'parser'@'127.0.0.1'  | def   | SUPER     | YES   | 
| 'parser'@'127.0.0.1'  | def   | CREATE TEMPORARY TABLES | YES   | 
| 'parser'@'127.0.0.1'  | def   | LOCK TABLES    | YES   | 
| 'parser'@'127.0.0.1'  | def   | EXECUTE     | YES   | 
| 'parser'@'127.0.0.1'  | def   | REPLICATION SLAVE  | YES   | 
| 'parser'@'127.0.0.1'  | def   | REPLICATION CLIENT  | YES   | 
| 'parser'@'127.0.0.1'  | def   | CREATE VIEW    | YES   | 
| 'parser'@'127.0.0.1'  | def   | SHOW VIEW    | YES   | 
| 'parser'@'127.0.0.1'  | def   | CREATE ROUTINE   | YES   | 
| 'parser'@'127.0.0.1'  | def   | ALTER ROUTINE   | YES   | 
| 'parser'@'127.0.0.1'  | def   | CREATE USER    | YES   | 
| 'parser'@'127.0.0.1'  | def   | EVENT     | YES   | 
| 'parser'@'127.0.0.1'  | def   | TRIGGER     | YES   | 
| 'parser'@'127.0.0.1'  | def   | CREATE TABLESPACE  | YES   | 
| 'simple_cms'@'localhost' | def   | USAGE     | NO   | 
| 'root'@'%'    | def   | SELECT     | YES   | 
| 'root'@'%'    | def   | INSERT     | YES   | 
| 'root'@'%'    | def   | UPDATE     | YES   | 
| 'root'@'%'    | def   | DELETE     | YES   | 
| 'root'@'%'    | def   | CREATE     | YES   | 
| 'root'@'%'    | def   | DROP     | YES   | 
| 'root'@'%'    | def   | RELOAD     | YES   | 
| 'root'@'%'    | def   | SHUTDOWN    | YES   | 
| 'root'@'%'    | def   | PROCESS     | YES   | 
| 'root'@'%'    | def   | FILE     | YES   | 
| 'root'@'%'    | def   | REFERENCES    | YES   | 
| 'root'@'%'    | def   | INDEX     | YES   | 
| 'root'@'%'    | def   | ALTER     | YES   | 
| 'root'@'%'    | def   | SHOW DATABASES   | YES   | 
| 'root'@'%'    | def   | SUPER     | YES   | 
| 'root'@'%'    | def   | CREATE TEMPORARY TABLES | YES   | 
| 'root'@'%'    | def   | LOCK TABLES    | YES   | 
| 'root'@'%'    | def   | EXECUTE     | YES   | 
| 'root'@'%'    | def   | REPLICATION SLAVE  | YES   | 
| 'root'@'%'    | def   | REPLICATION CLIENT  | YES   | 
| 'root'@'%'    | def   | CREATE VIEW    | YES   | 
| 'root'@'%'    | def   | SHOW VIEW    | YES   | 
| 'root'@'%'    | def   | CREATE ROUTINE   | YES   | 
| 'root'@'%'    | def   | ALTER ROUTINE   | YES   | 
| 'root'@'%'    | def   | CREATE USER    | YES   | 
| 'root'@'%'    | def   | EVENT     | YES   | 
| 'root'@'%'    | def   | TRIGGER     | YES   | 
| 'root'@'%'    | def   | CREATE TABLESPACE  | YES   | 
| 'parser'@'%'    | def   | SELECT     | YES   | 
| 'parser'@'%'    | def   | INSERT     | YES   | 
| 'parser'@'%'    | def   | UPDATE     | YES   | 
| 'parser'@'%'    | def   | DELETE     | YES   | 
| 'parser'@'%'    | def   | CREATE     | YES   | 
| 'parser'@'%'    | def   | DROP     | YES   | 
| 'parser'@'%'    | def   | RELOAD     | YES   | 
| 'parser'@'%'    | def   | SHUTDOWN    | YES   | 
| 'parser'@'%'    | def   | PROCESS     | YES   | 
| 'parser'@'%'    | def   | FILE     | YES   | 
| 'parser'@'%'    | def   | REFERENCES    | YES   | 
| 'parser'@'%'    | def   | INDEX     | YES   | 
| 'parser'@'%'    | def   | ALTER     | YES   | 
| 'parser'@'%'    | def   | SHOW DATABASES   | YES   | 
| 'parser'@'%'    | def   | SUPER     | YES   | 
| 'parser'@'%'    | def   | CREATE TEMPORARY TABLES | YES   | 
| 'parser'@'%'    | def   | LOCK TABLES    | YES   | 
| 'parser'@'%'    | def   | EXECUTE     | YES   | 
| 'parser'@'%'    | def   | REPLICATION SLAVE  | YES   | 
| 'parser'@'%'    | def   | REPLICATION CLIENT  | YES   | 
| 'parser'@'%'    | def   | CREATE VIEW    | YES   | 
| 'parser'@'%'    | def   | SHOW VIEW    | YES   | 
| 'parser'@'%'    | def   | CREATE ROUTINE   | YES   | 
| 'parser'@'%'    | def   | ALTER ROUTINE   | YES   | 
| 'parser'@'%'    | def   | CREATE USER    | YES   | 
| 'parser'@'%'    | def   | EVENT     | YES   | 
| 'parser'@'%'    | def   | TRIGGER     | YES   | 
| 'parser'@'%'    | def   | CREATE TABLESPACE  | YES   | 
+--------------------------+---------------+-------------------------+--------------+ 

Answer 1

好像用戶 「解析」 的權限列表是不正確的。您可以使用語句檢查用戶的配置。

SELECT * FROM information_schema.USER_PRIVILEGES; 

如果您已授予用戶新的權限，則必須重新加載設置。爲此，您可以使用此FLUSH PRIVILEGES;

如何授予不同的用戶權限：

• ALL特權─如我們前面看到的，這將允許MySQL用戶 所有訪問指定的數據庫（如果沒有數據庫被選中， 跨系統）
• CREATE-使他們能夠創建新表或數據庫
• 掇允許它們，將它們刪除表或數據庫
• 刪除 - 允許他們從表中插入 - 允許他們 插入行到表中刪除行
• 選擇 - 允許他們使用選擇命令 通過數據庫讀取
• 更新 - 允許他們更新錶行
• GRANT方案 - 允許他們授予或刪除其他用戶的權限

爲用戶提供一個允許特定的用戶，你可以使用這個框架：

GRANT [type of permission] ON [database name].[table name] TO ‘[username]’@'localhost’; 

我希望這會幫助你解決你的問題。永遠不要忘記沖洗！