今天在用动态sql做一个分类查询时，动态sql部分老是报异常，如下：
Caused by: 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 ‘‘ at line 16
经排查得知是动态sql部分的注释的原因：
日志打印的sql语句：