feat(grade): 实现年级管理的新增与删除功能

- 后端新增AddGradeReqVO和DeleteGradeReqVO请求对象
- GradeController添加新增和删除年级两个接口
- GradeService及其实现类实现新增和删除年级逻辑
- MyBatis映射新增插入和删除SQL语句
- 前端API新增addGrade和deleteGrade方法
- class.vue新增年级列表操作列及相关事件处理
- 新增AddGradeDialog组件用于输入新增年级名称
- 增加页面新增按钮及弹窗显示控制
- 实现删除年级的API调用与界面删除操作反馈

enlish-service/src/main/java/com/yinlihupo/enlish/service/controller/GradeController.java

@@ -2,6 +2,8 @@ package com.yinlihupo.enlish.service.controller;
 
 
 import com.yinlihupo.enlish.service.domain.dataobject.GradeDO;
+import com.yinlihupo.enlish.service.model.vo.grade.AddGradeReqVO;
+import com.yinlihupo.enlish.service.model.vo.grade.DeleteGradeReqVO;
 import com.yinlihupo.enlish.service.model.vo.grade.FindGradeListReqVO;
 import com.yinlihupo.enlish.service.model.vo.grade.FindGradeListRspVO;
 import com.yinlihupo.enlish.service.service.GradeService;
@@ -38,4 +40,16 @@ public class GradeController {
 
         return PageResponse.success(list, page, gradeCount, pageSize);
     }
+
+    @PostMapping("/add")
+    @ApiOperationLog(description = "添加年级")
+    public void addGrade(@RequestBody AddGradeReqVO addGradeReqVO) {
+        gradeService.insert(addGradeReqVO.getTitle());
+    }
+
+    @PostMapping("/delete")
+    @ApiOperationLog(description = "删除年级")
+    public void deleteGrade(@RequestBody DeleteGradeReqVO deleteGradeReqVO) {
+        gradeService.delete(deleteGradeReqVO.getId());
+    }
 }

enlish-service/src/main/java/com/yinlihupo/enlish/service/domain/mapper/GradeDOMapper.java

@@ -14,4 +14,8 @@ public interface GradeDOMapper {
     List<GradeDO> selectList(@Param("startIndex") Integer startIndex, @Param("pageSize") Integer pageSize);
 
     Integer selectCount();
+
+    int insert(String name);
+
+    void deleteById(Integer id);
 }

enlish-service/src/main/java/com/yinlihupo/enlish/service/model/vo/grade/AddGradeReqVO.java

@@ -0,0 +1,15 @@
+package com.yinlihupo.enlish.service.model.vo.grade;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@AllArgsConstructor
+@NoArgsConstructor
+@Data
+@Builder
+public class AddGradeReqVO {
+
+    private String title;
+}

enlish-service/src/main/java/com/yinlihupo/enlish/service/model/vo/grade/DeleteGradeReqVO.java

@@ -0,0 +1,15 @@
+package com.yinlihupo.enlish.service.model.vo.grade;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@AllArgsConstructor
+@NoArgsConstructor
+@Data
+@Builder
+public class DeleteGradeReqVO {
+
+    private Integer id;
+}

enlish-service/src/main/java/com/yinlihupo/enlish/service/service/GradeService.java

@@ -11,4 +11,8 @@ public interface GradeService {
     List<GradeDO> findGradeList(Integer page, Integer PageSize);
 
     Integer findGradeCount();
+
+    void insert(String name);
+
+    void delete(Integer id);
 }

enlish-service/src/main/java/com/yinlihupo/enlish/service/service/grade/GradeServiceImpl.java

@@ -28,4 +28,14 @@ public class GradeServiceImpl implements GradeService {
     public Integer findGradeCount() {
         return gradeDOMapper.selectCount();
     }
+
+    @Override
+    public void insert(String name) {
+        gradeDOMapper.insert(name);
+    }
+
+    @Override
+    public void delete(Integer id) {
+        gradeDOMapper.deleteById(id);
+    }
 }

enlish-service/src/main/resources/mapper/GradeDOMapper.xml

@@ -33,4 +33,16 @@
         from grade
     </select>
 
+    <insert id="insert">
+        insert into grade
+            (title, time)
+        values
+            (#{name}, now())
+    </insert>
+
+    <delete id="deleteById">
+        delete from grade
+        where id = #{id}
+    </delete>
+
 </mapper>