引起原因：java.sql.SQLException：用户“root”@“localhost”访问被拒绝（使用密码：YES）

当我尝试运行该应用程序时，出现以下错误（见下文）。已经尝试过类似主题上发布的解决方案。

    Exception in thread "main" org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'localhost' (using password: YES))
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:382)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:456)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:464)
    at com.caveofprogramming.spring.test.OffersDAO.getOffers(OffersDAO.java:26)
    at com.caveofprogramming.spring.test.App.main(App.java:16)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'localhost' (using password: YES))
    at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549)
    at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
    at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
    ... 10 more
Caused by: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

在阅读其他类似主题的解决方案后，我尝试了以下方法：

- GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'root' WITH GRANT OPTION;
- Change jdbc:mysql://localhost:3306/mydb to jdbc:mysql://127.0.0.1:3306/mydb
- Create a new User

如果我从 CMD 退出并尝试C:\mysql-5.6.21-winx64\bin>mysql -u root -p -h localhost我可以毫无问题地登录。

在我卸载 Mysql 并尝试安装之前，请提出任何其他建议。

错误java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)，使用提供的凭据登录 mysql 失败。

你可以检查两件事。

1. 如果提供的密码有效。

2. 授予特权。

应该是这样的，

'GRANT ALL PRIVILEGES ON *.* TO '[user name]'@'[server machine name]' IDENTIFIED BY '[password]' WITH GRANT OPTION;'

 FLUSH PRIVILEGES;

如果您没有执行刷新权限，您可能会得到相同的错误。

eg:

    GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'your_mysql_password' WITH GRANT OPTION;
    FLUSH PRIVILEGES;