mysql-数据库连不上求助，请问该从哪几方面改呢
HTTP ERROR 404
Problem accessing /gfhj/Jsp/errorPages/error.jsp. Reason:
NOT_FOUND
Caused by:
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 'root'@'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 'root'@'localhost' (using password: YES))
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:364)
at com.sun.proxy.$Proxy7.insert(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:236)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:46)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:43)
at com.sun.proxy.$Proxy13.adduser(Unknown Source)
at com.jiujiu.ssl.user.service.Test_UserService.adduser(Test_UserService.java:17)
at com.jiujiu.ssl.user.web.Test_UserContorller.adduser(Test_UserContorller.java:39)