JDBC Connection [HikariProxyConnection@1981372076 wrapping com.mysql.jdbc.JDBC4Connection@65d57e4e] will not be managed by Spring
==>  Preparing: select count(1) from mall_user where email=? 
==> Parameters: jack@imooc.com(String)
<==    Columns: count(1)
<==        Row: 0
<==      Total: 1
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2241f05b]
Creating a new SqlSession
SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2133661d] was not registered for synchronization because synchronization is not active
JDBC Connection [HikariProxyConnection@1821581506 wrapping com.mysql.jdbc.JDBC4Connection@65d57e4e] will not be managed by Spring
==>  Preparing: insert into mall_user (id, username, password, email, phone, question, answer, role, create_time, update_time) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) 
==> Parameters: null, jack(String), e10adc3949ba59abbe56e057f20f883e(String), jack@imooc.com(String), null, null, null, 1(Integer), null, null
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2133661d]

org.springframework.dao.DataIntegrityViolationException: 
### Error updating database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'create_time' cannot be null

大湿兄，我把create_time跟update_time字段通过mysql处理了，怎么还是会出现这个字段为null的问题