| New file | 
 |  |  | 
 |  |  | package com.dy.pipIrrWebFile.download; | 
 |  |  |  | 
 |  |  |  | 
 |  |  | import com.dy.common.util.NumUtil; | 
 |  |  | import com.dy.pipIrrGlobal.daoFi.WebFileMapper; | 
 |  |  | import com.dy.pipIrrGlobal.pojoFi.WebFile; | 
 |  |  | import lombok.extern.slf4j.Slf4j; | 
 |  |  | import org.springframework.beans.factory.annotation.Autowired; | 
 |  |  | import org.springframework.stereotype.Service; | 
 |  |  |  | 
 |  |  | @Slf4j | 
 |  |  | @Service | 
 |  |  | public class DownloadFileSv { | 
 |  |  |     @Autowired | 
 |  |  |     private WebFileMapper dao; | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 用ID查询 | 
 |  |  |      * @param id | 
 |  |  |      * @return | 
 |  |  |      */ | 
 |  |  |     public WebFile selectById(String id){ | 
 |  |  |         if(NumUtil.isPlusIntNumber(id)){ | 
 |  |  |             return dao.selectByPrimaryKey(Long.parseLong(id)) ; | 
 |  |  |         }else{ | 
 |  |  |             return null ; | 
 |  |  |         } | 
 |  |  |     } | 
 |  |  |  | 
 |  |  | } |