SpringMVC+myBatis启动报错：Access denied for user 'stati'@'localhost' (using password: YES)

这个错误有点莫名其妙；在另一个工程中用的同样的配置不报错；但就这个新工程就有这一问题；

我这里“数据库链接-账户-密码”都没有问题的；用Navicat for Mysql工具是能链接成功的，所以排除了这几个错误原因；

虽然解决了这个问题；但问题原因不知道；

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))

报错前的配置是这样写的：

<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}"/>

之后改成如下就正常了：

<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个"db."将这一错误解决了；