SpringMVC+myBatis啓動報錯：Access denied for user 'stati'@'localhost' (using password: YES)

這個錯誤有點莫名其妙；在另一個工程中用的同樣的配置不報錯；但就這個新工程就有這一問題；

我這裏“數據庫鏈接-賬戶-密碼”都沒有問題的；用Navicat for Mysql工具是能鏈接成功的，所以排除了這幾個錯誤原因；

雖然解決了這個問題；但問題原因不知道；

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error updating database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'stati'@'localhost' (using password: YES))
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'stati'@'localhost' (using password: YES))

報錯前的配置是這樣寫的：

<bean id="dataSource" destroy-method="close"
          class="org.apache.commons.dbcp.BasicDataSource"
          p:driverClassName="${driver}"
          p:url="${url}"
          p:username="${username}"
          p:password="${password}"
          p:initialSize="${initialSize}"
          p:maxActive="${maxActive}"
          p:maxIdle="${maxIdle}"
          p:minIdle="${minIdle}"
          p:maxWait="${maxWait}"/>

之後改成如下就正常了：

<bean id="dataSource" destroy-method="close"
          class="org.apache.commons.dbcp.BasicDataSource"
          p:driverClassName="${db.driver}"
          p:url="${db.url}"
          p:username="${db.username}"
          p:password="${db.password}"
          p:initialSize="${db.initialSize}"
          p:maxActive="${db.maxActive}"
          p:maxIdle="${db.maxIdle}"
          p:minIdle="${db.minIdle}"
          p:maxWait="${db.maxWait}"/>

就是在前面配置名前加了一個"db."將這一錯誤解決了；