spzx-common/common-util/src/main/java/com/atguigu/constant/MessageConstant.java

@@ -19,4 +19,5 @@ public class MessageConstant {
     public static final String REQUEST_NOT_EMPTY = "请求不为空";
     public static final String UPDATE_ID_IS_NOT_EMPTY = "删除id不能为空";
     public static final String DELETE_ID_IS_NOT_EMPTY = "修改id不能为空";
+    public static final String MENU_IS_NOT_EXIST = "菜单不存在";
 }

spzx-manager/src/main/java/com/atguigu/spzx/manger/controller/SysMenuController.java

@@ -39,4 +39,11 @@ public class SysMenuController {
         sysMenuService.updateById(sysMenu);
         return Result.success();
     }
+
+    @Operation(summary = "删除菜单", description = "删除菜单")
+    @PutMapping("removeById/{id}")
+    public Result removeById(@PathVariable Long id) {
+        sysMenuService.removeById(id);
+        return Result.success();
+    }
 }

spzx-manager/src/main/java/com/atguigu/spzx/manger/mapper/SysMenuMapper.java

@@ -27,4 +27,19 @@ public interface SysMenuMapper {
      * @param sysMenu 系统菜单实体类
      */
     void updateById(SysMenu sysMenu);
+
+    /**
+     * 根据id查询菜单
+     *
+     * @param id 菜单id
+     * @return 是否存在
+     */
+    int countByParentId(Long id);
+
+    /**
+     * 根据id删除菜单
+     *
+     * @param id 菜单id
+     */
+    void deleteById(Long id);
 }

spzx-manager/src/main/java/com/atguigu/spzx/manger/service/SysMenuService.java

@@ -25,4 +25,11 @@ public interface SysMenuService {
      * @param sysMenu 系统菜单实体类
      */
     void updateById(SysMenu sysMenu);
+
+    /**
+     * 删除菜单
+     *
+     * @param id 菜单id
+     */
+    void removeById(Long id);
 }

spzx-manager/src/main/java/com/atguigu/spzx/manger/service/impl/SysMenuServiceImpl.java

@@ -1,6 +1,7 @@
 package com.atguigu.spzx.manger.service.impl;
 
 import com.atguigu.constant.MessageConstant;
+import com.atguigu.exception.BunnyException;
 import com.atguigu.spzx.manger.mapper.SysMenuMapper;
 import com.atguigu.spzx.manger.service.SysMenuService;
 import com.atguigu.spzx.model.entity.system.SysMenu;
@@ -49,4 +50,18 @@ public class SysMenuServiceImpl implements SysMenuService {
         emptyUtil.isEmpty(sysMenu.getId(), MessageConstant.DELETE_ID_IS_NOT_EMPTY);
         sysMenuMapper.updateById(sysMenu);
     }
+
+    /**
+     * 删除菜单
+     *
+     * @param id 菜单id
+     */
+    @Override
+    public void removeById(Long id) {
+        int count = sysMenuMapper.countByParentId(id);  // 先查询是否存在子菜单，如果存在不允许进行删除
+        if (count > 0) {
+            throw new BunnyException(MessageConstant.MENU_IS_NOT_EXIST);
+        }
+        sysMenuMapper.deleteById(id);
+    }
 }

spzx-manager/src/main/resources/mapper/SysMenuMapper.xml

@@ -37,6 +37,22 @@
         where id = #{id};
     </update>
 
+    <!-- 根据id查询菜单 -->
+    <update id="countByParentId">
+        select count(id)
+        from sys_menu
+        where parent_id = #{parentId}
+          and is_deleted = 0
+    </update>
+
+    <!-- 根据id删除菜单 -->
+    <delete id="deleteById">
+        update sys_menu
+        set update_time = now(),
+            is_deleted  = 1
+        where id = #{id}
+    </delete>
+
     <!-- 查询菜单 -->
     <select id="selectAll" resultType="com.atguigu.spzx.model.entity.system.SysMenu">
         select