ADD file via upload

flower_back/src/main/java/com/example/flower/service/ClassService.java

@@ -0,0 +1,46 @@
+package com.example.flower.service;
+
+import com.example.flower.entity.Class;
+import com.example.flower.mapper.ClassMapper;
+import com.example.flower.service.impl.ClassServiceImpl;
+import com.github.pagehelper.PageHelper;
+import com.github.pagehelper.PageInfo;
+import org.springframework.stereotype.Service;
+import jakarta.annotation.Resource;
+
+@Service
+public class ClassService implements ClassServiceImpl {
+    @Resource
+    private ClassMapper classMapper;
+
+    @Override
+    public PageInfo<Class> classList(int page, int page_size) {
+        PageHelper.startPage(page,page_size);
+        return new PageInfo<>(classMapper.classList());
+    }
+    @Override
+    public PageInfo<Class> classListByQuery(int page,int page_size,String class_name){
+        PageHelper.startPage(page,page_size);
+        return new PageInfo<>(classMapper.classListByQuery(class_name));
+    }
+    @Override
+    public void classAdd(Class c){
+        classMapper.classAdd(c);
+    }
+    @Override
+    public int classDeletePer(int class_id){
+        return classMapper.classDeletePer(class_id);
+    }
+    @Override
+    public int classDeleteMul(int[] class_ids){
+        return classMapper.classDeleteMul(class_ids);
+    }
+    @Override
+    public Class classInfo(int class_id){
+        return classMapper.classInfo(class_id);
+    }
+    @Override
+    public int classModify(Class c){
+        return classMapper.classModify(c);
+    }
+}