mybatis的一个重大好处是可写动态的sql，否则我们还需要在代码中判断
关于@param注解的使用，关于<foreach>标签中collection的使用，这两篇博文有很好的解释。@Param的原理是将@Param注解的编码封装成了map，所以在使用Map参数据的接口中，不应该使用@Param注解。
mybatis中相关的报错：
The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: select * from news where news_abstract like %?% and item1 = ?
### 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 '%'abstract'% and
item1 = 'dsdzfs'' 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 '%'abstract'% and
item1 = 'dsdzfs'' 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 '%'abstract'% and
item1 = 'dsdzfs'' at line 1
近期的数据库和批量查询写法，让我对mybatis中的mapper文件的写法更加熟练了。
参考博文：https://blog.csdn.net/lgc592519828/article/details/79749972?utm_source=blogkpcl1
参考博文：https://www.cnblogs.com/fnlingnzb-learner/p/10566452.html