替换函数部分

mall-mbg/src/main/java/com/macro/mall/mapper/CmsSubjectCategoryMapper.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.CmsSubjectCategory;
-import com.macro.mall.model.CmsSubjectCategoryExample;
-import java.util.List;
-import org.apache.ibatis.annotations.Param;
+import com.macro.mall.model.CmsSubjectCategory; // 导入了CmsSubjectCategory实体类，用于数据库表的映射
+import com.macro.mall.model.CmsSubjectCategoryExample; // 导入了CmsSubjectCategoryExample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 CmsSubjectCategoryMapper {
-    long countByExample(CmsSubjectCategoryExample example);
+public interface CmsSubjectCategoryMapper { // 声明了一个MyBatis的Mapper接口，用于数据库操作
+    // 以下方法都是MyBatis映射的方法，用于数据库的CRUD操作
 
-    int deleteByExample(CmsSubjectCategoryExample example);
+    long countByExample(CmsSubjectCategoryExample example); // 根据example条件统计记录数
 
-    int deleteByPrimaryKey(Long id);
+    int deleteByExample(CmsSubjectCategoryExample example); // 根据example条件删除记录
 
-    int insert(CmsSubjectCategory record);
+    int deleteByPrimaryKey(Long id); // 根据主键id删除记录
 
-    int insertSelective(CmsSubjectCategory record);
+    int insert(CmsSubjectCategory record); // 插入一条CmsSubjectCategory记录
 
-    List<CmsSubjectCategory> selectByExample(CmsSubjectCategoryExample example);
+    int insertSelective(CmsSubjectCategory record); // 插入一条CmsSubjectCategory记录，只插入不为null的字段
 
-    CmsSubjectCategory selectByPrimaryKey(Long id);
+    List<CmsSubjectCategory> selectByExample(CmsSubjectCategoryExample example); // 根据example条件查询CmsSubjectCategory记录
 
-    int updateByExampleSelective(@Param("record") CmsSubjectCategory record, @Param("example") CmsSubjectCategoryExample example);
+    CmsSubjectCategory selectByPrimaryKey(Long id); // 根据主键id查询CmsSubjectCategory记录
 
-    int updateByExample(@Param("record") CmsSubjectCategory record, @Param("example") CmsSubjectCategoryExample example);
+    int updateByExampleSelective(@Param("record") CmsSubjectCategory record, @Param("example") CmsSubjectCategoryExample example); // 根据example条件更新CmsSubjectCategory记录，只更新不为null的字段
 
-    int updateByPrimaryKeySelective(CmsSubjectCategory record);
+    int updateByExample(@Param("record") CmsSubjectCategory record, @Param("example") CmsSubjectCategoryExample example); // 根据example条件更新CmsSubjectCategory记录
 
-    int updateByPrimaryKey(CmsSubjectCategory record);
+    int updateByPrimaryKeySelective(CmsSubjectCategory record); // 根据主键id更新CmsSubjectCategory记录，只更新不为null的字段
+
+    int updateByPrimaryKey(CmsSubjectCategory record); // 根据主键id更新CmsSubjectCategory记录
 }