上傳excel，批量修改數據（mybatis批量）(四)

控制層 SpringMVC

@ResponseBody
	@RequestMapping(value = "BankDataUpload.do", produces = "application/text; charset=utf-8")
	public String  BankDataUpload(HttpServletRequest request, HttpServletResponse response){
		String str="";
		try {
			str=sysUploadServiceimpl.BankDataUpload_1(request, response);
			//System.out.println(str);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return str;
		}

實現類 SysUploadServiceimpl

public String BankDataUpload_1(HttpServletRequest request, HttpServletResponse response) throws Exception {
		List<TemporaryClient> listofTemporaryClient_1 = new ArrayList<TemporaryClient>();
		 // 讀取Excel信息
		List<List<Object>> listob = UploadExcelUtil.ExcelOfUpload(request, response);
         String data="";
		// 商品map<商品名稱，商品id>
		List<Goodsmanage> listgoodsmanage = dao.getGoodsName();
		Map<String, Integer> mapofgid = UploadExcelUtil.getMapOfGoodmanessage(listgoodsmanage); // 商品map
			for (int i = 0; i < listob.size(); i++) {
					try {
						List<Object> lo = listob.get(i);
						TemporaryClient temporary = new TemporaryClient();
						temporary.setCheckTime(String.valueOf(lo.get(1)).substring(0, 10));
						String cName=String.valueOf(lo.get(2)).substring(0, 1);
						cName=cName+'%';
						temporary.setCname(cName);
						String ctel=String.valueOf(lo.get(3));
						String ctel_1=ctel.substring(0,3);
						String ctel_2=ctel.substring(7,11);
						String tel=ctel_1+'%'+ctel_2;
						temporary.setCtel(tel);
						 Integer g_id = mapofgid.get(String.valueOf(lo.get(4)));
						temporary.setGid(g_id);
					//將excel裏的信息轉化爲list對象
						listofTemporaryClient_1.add(temporary);
					} catch (Exception e) {
						System.out.println("----Excel表出現異常 _____行數 " + i);
						data=data+"----Excel表出現異常 _____行數 " + i;
						e.printStackTrace();
					}
			}
			int sun=listofTemporaryClient_1.size();
			System.out.println("---------總的導入數量--------"+sun);
			data=data+"---------總的導入數量--------"+sun;
			try {
				int num=dao.UpdateTemporaryClient_1(listofTemporaryClient_1);
				System.out.println("---------成功修改的數據量--------"+num);
				data=data+"---------成功修改的數據量--------"+num;
			} catch (Exception e) {
				System.out.println("---------導入失敗--------");
				data=data+"---------導入失敗-------- ";
				e.printStackTrace();
			}		
		return data;
	}

結果如圖顯示。

mapper層（Dao層）

    //獲取信用卡信息（名字，id()
    List<Goodsmanage>  getGoodsName();	 
    
    //根據比對出來的c_id，check_time修改客戶狀態爲status=1；
	int UpdateTemporaryClient_1(@Param("listofTemporaryClient")List<TemporaryClient> listofTemporaryClient);

mybatis 裏的sql語句

將商品查出，結果集爲List< goodsmanagess>,再通過將該lis裏的gid，gnamet轉化爲map集，方便根據商品名字得出商品gid，gid=map.get(gname)。減少數據庫查詢。

<!-- 獲取商品信息 -->
	<select id="getGoodsName" resultType="cn.sys.entity.Goodsmanage">
		select g_id as gId, name from goodsmanage
	</select>

將excel裏的數據轉化爲list< UpdateTemporaryClient>對象，利用mybatis批量修改數據庫裏的數據。sql語句如下。

 <update id="UpdateTemporaryClient_1" parameterType="java.util.List">
     update client
            <trim prefix="set" suffixOverrides=",">
                         
             <trim prefix="state =case" suffix="end," >
                 <foreach collection="listofTemporaryClient" item="i" index="index">
                          when c_tel  like #{i.ctel } then 1
                 </foreach>
              </trim>   
         
             <trim prefix="check_time =case" suffix="end,">
                 <foreach collection="listofTemporaryClient" item="i" index="index">                     
                          when c_tel like #{i.ctel } then #{i.checkTime}                   
                 </foreach>
              </trim>
             </trim>
            where
            <foreach collection="listofTemporaryClient" separator="or" item="i" index="index" >
            g_id=#{i.gid} and  c_tel like #{i.ctel}  and c_name like #{i.cname} and  #{i.checkTime} >=created_time
          </foreach>    
     </update>