### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connecti

### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connecti

看到这个错误以后,大部分的同学应该觉得应该是觉得,啊这,!这不是密码错误了嘛?
一开始我也以为是密码错误,但是在我的再三检查下,发现,driver,url,username,password并没有错误!而且更诡异的是
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connecti### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connecti怎么连我的username都给改了呢??
后来发现原来似乎必须在.properties文件中标明jdbc.xxx才能正常使用!
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connecti