替换函数部分

mall-mbg/src/main/java/com/macro/mall/mapper/CmsPrefrenceAreaProductRelationMapper.java

@@ -1,30 +1,32 @@
-package com.macro.mall.mapper;
+package com.macro.mall.mapper; // 定义了该接口所属的包名，用于Java的包管理
 
-import com.macro.mall.model.CmsPrefrenceAreaProductRelation;
-import com.macro.mall.model.CmsPrefrenceAreaProductRelationExample;
-import java.util.List;
-import org.apache.ibatis.annotations.Param;
+import com.macro.mall.model.CmsPrefrenceAreaProductRelation; // 导入了实体类，用于数据库表的映射
+import com.macro.mall.model.CmsPrefrenceAreaProductRelationExample; // 导入了实体类的Example类，用于构建查询条件
+import java.util.List; // 导入了List接口，用于存储查询结果集
+import org.apache.ibatis.annotations.Param; // 导入了MyBatis的Param注解，用于指定参数名称
 
-public interface CmsPrefrenceAreaProductRelationMapper {
-    long countByExample(CmsPrefrenceAreaProductRelationExample example);
+public interface CmsPrefrenceAreaProductRelationMapper { // 声明了一个MyBatis的Mapper接口
+    // 以下方法都是MyBatis映射的方法，用于数据库的CRUD操作
 
-    int deleteByExample(CmsPrefrenceAreaProductRelationExample example);
+    long countByExample(CmsPrefrenceAreaProductRelationExample example); // 根据example条件统计记录数
 
-    int deleteByPrimaryKey(Long id);
+    int deleteByExample(CmsPrefrenceAreaProductRelationExample example); // 根据example条件删除记录
 
-    int insert(CmsPrefrenceAreaProductRelation record);
+    int deleteByPrimaryKey(Long id); // 根据主键删除记录
 
-    int insertSelective(CmsPrefrenceAreaProductRelation record);
+    int insert(CmsPrefrenceAreaProductRelation record); // 插入一条记录
 
-    List<CmsPrefrenceAreaProductRelation> selectByExample(CmsPrefrenceAreaProductRelationExample example);
+    int insertSelective(CmsPrefrenceAreaProductRelation record); // 插入一条记录，只插入不为null的字段
 
-    CmsPrefrenceAreaProductRelation selectByPrimaryKey(Long id);
+    List<CmsPrefrenceAreaProductRelation> selectByExample(CmsPrefrenceAreaProductRelationExample example); // 根据example条件查询记录
 
-    int updateByExampleSelective(@Param("record") CmsPrefrenceAreaProductRelation record, @Param("example") CmsPrefrenceAreaProductRelationExample example);
+    CmsPrefrenceAreaProductRelation selectByPrimaryKey(Long id); // 根据主键查询记录
 
-    int updateByExample(@Param("record") CmsPrefrenceAreaProductRelation record, @Param("example") CmsPrefrenceAreaProductRelationExample example);
+    int updateByExampleSelective(@Param("record") CmsPrefrenceAreaProductRelation record, @Param("example") CmsPrefrenceAreaProductRelationExample example); // 根据example条件更新记录，只更新不为null的字段
 
-    int updateByPrimaryKeySelective(CmsPrefrenceAreaProductRelation record);
+    int updateByExample(@Param("record") CmsPrefrenceAreaProductRelation record, @Param("example") CmsPrefrenceAreaProductRelationExample example); // 根据example条件更新记录
 
-    int updateByPrimaryKey(CmsPrefrenceAreaProductRelation record);
+    int updateByPrimaryKeySelective(CmsPrefrenceAreaProductRelation record); // 根据主键更新记录，只更新不为null的字段
+
+    int updateByPrimaryKey(CmsPrefrenceAreaProductRelation record); // 根据主键更新记录
 }