org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection;

今天在自建一个maven web项目，在进行测试的时候，报错，详细信息如下：

### Error querying 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 'root'@'localhost' (using password: YES))
### The error may exist in file [E:\work_pratise\happyrunning\happyrunning\target\classes\com\zxc\happy\mapping\UserMapper.xml]
### The error may involve com.zxc.happy.dao.UserMapper.selectByPrimaryKey
### The error occurred while executing a query
### 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 'root'@'localhost' (using password: YES))

网上遇到此问题的好多帖子，更多的是表示配置出问题，参考链接如下：
http://blog.csdn.net/liwuyang2013/article/details/25986597

http://blog.csdn.net/cool_easy/article/details/42913811

检查jdbc.properties的配置，路径以及用户密码都没有问题，驱动类jar包也有，后来仔细检查，发现在配置文件：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/running_man?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root jdbc.password=root后面有空格，这样就会报上述错误，而且在这四条配置中，若后面有空格，都会报上述错误