Request processing failed； nested exception is org.mybatis.spring.MyBatisSystemException: nested exc

IDEA运行SSM系统学生信息管理系统：SSM框架实现学生信息的增删改查

1、报错如下：

HTTP状态 500 - 内部服务器错误

类型 异常报告
消息 Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
描述 服务器遇到一个意外的情况，阻止它完成请求。
例外情况
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'localhost' (using password: YES))
### The error may exist in jee/support/dao/AdminDao.xml
### The error may involve jee.support.dao.AdminDao.findByNameAndPwd
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'localhost' (using password: YES))org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)javax.servlet.http.HttpServlet.service(HttpServlet.java:652)org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)javax.servlet.http.HttpServlet.service(HttpServlet.java:733)org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

2、原因和解决办法：

src–main–resources–db.propertites:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/customersupport3?characterEncoding=utf8
jdbc.username=root
jdbc.password=jerry
jdbc.maxTotal=30
jdbc.maxIdle=10
jdbc.initialSize=5

password修改成本地mysql数据库密码。

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Request processing failed； nested exception is org.mybatis.spring.MyBatisSystemException: nested exc

1、报错如下：

2、原因和解决办法：

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