标题:springBoot整合mybatis_plus时候，出现Unknown column ‘grade_id’ in ‘field list’
我数据库中的字段和Student中的属性名，一致，但还是出现出错误，所以，可以手动加一个@TableField("gradeId") gradeId为数据库中字段名
org.springframework.jdbc.BadSqlGrammarException:
### Error querying database. Cause: java.sql.SQLSyntaxErrorException: Unknown column 'grade_id' in 'field list'
### The error may exist in com/itheima/dao/StudentDao.java (best guess)
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT id,name,email,borndate,grade_id,username,password,sex FROM student
### Cause: java.sql.SQLSyntaxErrorException: Unknown column 'grade_id' in 'field list'
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: Unknown column 'grade_id' in 'field list'