问题：
Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'case' at line 1
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'case' at line 1] with root cause
java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'case' at line 1
解决方法：
更换数据库表的表名，把case换成tb_case
当然，xml文件和bean也要相应更改。
bean是类声明前加上注释：
@Alias("tb_case")
@TableName("tb_case")