数据库表、字段注释补全，优化表结构

src/main/java/cn/timer/api/bean/clazz/CityClazz.java

-/**
- * @date 2019年12月7日  
- * @author 翁东州
- * @方法中文名称:
- */
-package cn.timer.api.bean.clazz;
-
-import javax.persistence.Entity;
-import javax.persistence.GeneratedValue;
-import javax.persistence.Id;
-import javax.persistence.Table;
-
-import com.baomidou.mybatisplus.annotation.IdType;
-import com.baomidou.mybatisplus.annotation.TableId;
-import com.baomidou.mybatisplus.extension.activerecord.Model;
-
-import io.swagger.annotations.ApiModel;
-import io.swagger.annotations.ApiModelProperty;
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-
-/**
- * @date 2019年12月7日  
- * @author 翁东州
- * @方法中文名称:
- */
-
-@Entity
-@Data
-@Builder
-@NoArgsConstructor
-@AllArgsConstructor
-@Table(name="city_clazz")
-@ApiModel("城市类")
-public class CityClazz extends Model<CityClazz>{
-
-	private static final long serialVersionUID = 3208566213833439168L;
-
-	@Id
-    @GeneratedValue
-    @TableId (type = IdType.AUTO)
-    @ApiModelProperty(value="id",example="")
-    private Integer id;
-	
-	@ApiModelProperty(value="data",example="")
-	private byte[] data;
-	
-}

src/main/java/cn/timer/api/dao/clazz/CityClazzMapper.java

-/**
- * @date 2019年12月7日  
- * @author 翁东州
- * @方法中文名称:
- */
-package cn.timer.api.dao.clazz;
-
-import org.springframework.stereotype.Repository;
-
-import com.baomidou.mybatisplus.core.mapper.BaseMapper;
-
-import cn.timer.api.bean.clazz.CityClazz;
-
-/**
-*  图标库
-* @author Tang 2019-11-26
-*/
-@Repository
-public interface CityClazzMapper extends BaseMapper<CityClazz>{
-
-}