完成RoomTypeService类编写，通过单元测试

src/main/java/cn/mafangui/hotel/mapper/RoomTypeMapper.java

@@ -1,17 +1,25 @@
 package cn.mafangui.hotel.mapper;
 
 import cn.mafangui.hotel.entity.RoomType;
+import org.springframework.stereotype.Component;
 
+import java.util.List;
+
+@Component
 public interface RoomTypeMapper {
-    int deleteByPrimaryKey(Long typeId);
+    int deleteByPrimaryKey(Integer typeId);
 
     int insert(RoomType record);
 
     int insertSelective(RoomType record);
 
-    RoomType selectByPrimaryKey(Long typeId);
+    RoomType selectByPrimaryKey(Integer typeId);
 
     int updateByPrimaryKeySelective(RoomType record);
 
     int updateByPrimaryKey(RoomType record);
+
+    List<RoomType> selectAll();
+
+    RoomType selectByRoomType(String roomType);
 }