tk.mybatis selectByPrimaryKey无法正确识别主键

selectByPrimaryKey无法正确识别主键，查看日志，发现报如下错误：

==> Preparing: SELECT username,password,name,age,sex,birthday,created,updated FROM tb_user WHERE username = ? AND password = ? AND name = ? AND age = ? AND sex = ? AND birthday = ? AND created = ? AND updated = ?
==> Parameters: 1(Long), 1(Long), 1(Long), 1(Long), 1(Long), 1(Long), 1(Long), 1(Long)

解决方案如下：

1、主键的字段上导包错误，应该导入 import javax.persistence.Id

2、主键的数据类型要写成包装类类型，比如是自增id的数据类型为Long，不是long

纪念这个错误。