ADD file via upload

flower_back/src/main/java/com/example/flower/mapper/ClassMapper.java

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+package com.example.flower.mapper;
+
+import com.example.flower.entity.Class;
+import org.apache.ibatis.annotations.Mapper;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Mapper
+@Repository
+public interface ClassMapper {
+    List<Class> classList(); //获取所有类别信息
+    List<Class> classListByQuery(String class_name);//查询类别信息列表
+    void classAdd(Class c); //添加新类别
+    int classDeletePer(int class_id); //删除单个类别
+    int classDeleteMul(int[] class_ids); //批量删除类别
+    Class classInfo(int class_id); //获取类别信息
+    int classModify(Class c); //修改类别信息
+}