| | |
| | | package com.lunhan.xxx.repository.imapper; |
| | | |
| | | public interface TestInfoMapper { |
| | | import com.baomidou.mybatisplus.core.toolkit.Constants; |
| | | import com.lunhan.xxx.entity.dto.search.SearchTestInfo; |
| | | import com.lunhan.xxx.repository.BasicMapper; |
| | | import com.lunhan.xxx.repository.po.TestInfoPO; |
| | | import org.apache.ibatis.annotations.Param; |
| | | import org.apache.ibatis.annotations.Select; |
| | | |
| | | public interface TestInfoMapper extends BasicMapper<TestInfoPO> { |
| | | // #{param}:会进行预编译,而且进行类型匹配,最后进行变量替换,括号中可以添加映射类型如 |
| | | // @Select( |
| | | // "<script>" + |
| | | // "select * from student where id= #{param,javaType=int,jdbcType=NUMERIC}" + |
| | | // "</script> " |
| | | // ) |
| | | // ${param}:$只是只是简单的字符串拼接,要特别小心sql注入问题,对应非变量部分,只能用$。$方式一般用于传入数据库对象,比如这种group by 字段 ,order by 字段,表名,字段名等没法使用占位符的就需要使用${param} |
| | | |
| | | @Select("select * from test_info where id = #{id}") |
| | | TestInfoPO testGet(Long id); |
| | | |
| | | @Select("select * from test_info where id = #{userName}") |
| | | TestInfoPO testGet2(String userName); |
| | | |
| | | @Select("select * from test_info where status = #{ew.status}") |
| | | TestInfoPO testGet3(@Param(Constants.WRAPPER) SearchTestInfo search); |
| | | |
| | | @Select("select * from test_info where status = #{search.status}") |
| | | TestInfoPO testGet4(@Param("search") SearchTestInfo search); |
| | | |
| | | } |