我做ssm然后做到验证登录的时候出了这个问题

Question

怎么办，我跟着视频老师做的看了两遍了还是没找到错误= =。大佬救救孩子吧
严重: Servlet.service() for servlet [DispatcherServlet] in context with path [/SJLykt] threw exception [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 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'db_vote_system'

The error may exist in file [C:\XXXX\sp.metadata.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\SJLykt\WEB-INF\classes\config\mybatis\mapper\UserMapper.xml]

The error may involve ykt.dao.UserDao.findByUserName

The error occurred while executing a query

Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database 'db_vote_system'] with root cause

Answer 1

db_vote_system 数据库不存在。要学会看异常信息，根据异常信息定位问题很高效的啊。