ADD file via upload

flower_back/src/main/java/com/example/flower/service/impl/ClassServiceImpl.java

@@ -0,0 +1,18 @@
+package com.example.flower.service.impl;
+
+import com.example.flower.entity.Class;
+import com.github.pagehelper.PageInfo;
+import org.apache.ibatis.annotations.Mapper;
+import org.springframework.stereotype.Repository;
+
+@Mapper
+@Repository
+public interface ClassServiceImpl {
+    PageInfo<Class> classList(int page, int page_size);
+    PageInfo<Class> classListByQuery(int page,int page_size,String class_name);
+    void classAdd(Class c);
+    int classDeletePer(int class_id);
+    int classDeleteMul(int[] class_ids);
+    Class classInfo(int class_id);
+    int classModify(Class c);
+}