【小西】优化若依导出功能，若依继承导出

谁借莪１个温暖的怀抱￠ 2023-10-04 20:36 40阅读 0赞

### 前言 ###

现需求是在原有的导出功能基础上，新增两列。  
![在这里插入图片描述][8660cb8bf100451a9d4ffd312429b589.png]

### 实现 ###

因为新增两列不是数据库表中字段。因此，需要需要建立一个VO类。  
原本想用若依继承导出，如下所示：

@Data
    public class ThemeActivityUserVO  extends ThemeActivityUser {
        
    	private static final long serialVersionUID = 1L;
    	private ThemeActivityUser themeActivityUser;
    	/**
    	 * 可以领取的礼品名称
    	 */
    	@Excel(name = "可以领取的礼品名称", type = Excel.Type.EXPORT)
    	private String giftNames;
    	/**
    	 * 可以领取的礼品总数量
    	 */
    	@Excel(name = "可以领取的礼品总数量", type = Excel.Type.EXPORT)
    	int  giftNumber;
    
    }

但想起来Java中不能继承祖父类的私有属性，所以就把VO改成如所示：

#### ThemeActivityUserVO ####

/**
     * @Description: 活动用户群体对象VO
     */
    @Data
    public class ThemeActivityUserVO  implements Serializable {
        
    	private static final long serialVersionUID = 1L;
    	@Excel(name = "领取单号", type = Excel.Type.EXPORT)
    	private String id;
    	/**
    	 * 活动ID
    	 */
    	@Excel(name = "活动ID", type = Excel.Type.EXPORT)
    	private String activityId;
    	/**
    	 * 用户ID
    	 */
    	@Excel(name = "用户ID", type = Excel.Type.EXPORT)
    	private String userId;
    	/**
    	 * 工号
    	 */
    	@Excel(name = "工号", type = Excel.Type.EXPORT)
    	private String workNo;
    	/**
    	 * 手机号
    	 */
    	@Excel(name = "手机号", type = Excel.Type.EXPORT)
    	private String phone;
    	/**
    	 * 用户姓名
    	 */
    	@Excel(name = "用户姓名", type = Excel.Type.EXPORT)
    	private String userName;
    	/**
    	 * 公司
    	 */
    	@Excel(name = "公司", type = Excel.Type.EXPORT)
    	private String company;
    	/**
    	 * 部门
    	 */
    	@Excel(name = "部门", type = Excel.Type.EXPORT)
    	private String department;
    	/**
    	 * 收货人名称
    	 */
    	@Excel(name = "收货人名称", type = Excel.Type.EXPORT)
    	private String receiveName;
    	/**
    	 * 收货人手机号
    	 */
    	@Excel(name = "收货人手机号", type = Excel.Type.EXPORT)
    	private String receivePhone;
    	/**
    	 * 收货地区
    	 */
    	@Excel(name = "收货地区", type = Excel.Type.EXPORT)
    	private String receiveRegion;
    	/**
    	 * 收货地址
    	 */
    	@Excel(name = "收货地址", type = Excel.Type.EXPORT)
    	private String receiveAddress;
    	/**
    	 * 快递单号
    	 */
    	@Excel(name = "快递单号", type = Excel.Type.EXPORT)
    	private String logisticsNo;
    	/**
    	 * 物流公司
    	 */
    	@Excel(name = "物流公司", type = Excel.Type.EXPORT)
    	private String logisticsCompany;
    	/**
    	 * 快递联系方式
    	 */
    	@Excel(name = "快递联系方式", type = Excel.Type.EXPORT)
    	private String logisticsPhone;
    	/**
    	 * 发货时间
    	 */
    	@Excel(name = "发货时间", type = Excel.Type.EXPORT, dateFormat = "yyyy-MM-dd HH:mm:ss")
    	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    	@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    	private Date deliveryTime;
    	/**
    	 * 领取状态：0-待领取 1-已领取 2-已发货 9-补发待领取
    	 */
    	@Excel(name = "领取状态", type = Excel.Type.EXPORT, readConverterExp = "0-待领取,1=已领取,2=已发货,9=补发待领取")
    	private String userStatus;
    
    	/**
    	 * 领取时间
    	 */
    	@Excel(name = "领取时间", type = Excel.Type.EXPORT, dateFormat = "yyyy-MM-dd HH:mm:ss")
    	@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    	@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    	private Date receiveTime;
    	/**
    	 * 领取数
    	 */
    	@Excel(name = "领取数", type = Excel.Type.EXPORT)
    	private Integer receiveNum;
    	/**
    	 * 领取的礼品ID
    	 */
    	private String receiveGiftIds;
    	/**
    	 * 已经领取的礼品名称
    	 */
    	@Excel(name = "已经领取的礼品名称", type = Excel.Type.EXPORT)
    	private String receiveGiftNames;
    	/**
    	 * 可以领取的礼品名称
    	 */
    	@Excel(name = "可以领取的礼品名称", type = Excel.Type.EXPORT)
    	private String giftNames;
    	/**
    	 * 可以领取的礼品总数量
    	 */
    	@Excel(name = "可以领取的礼品总数量", type = Excel.Type.EXPORT)
    	int  giftNumber;
    
    }

#### Contorller ####

/**
         * @Description: 导出活动用户列表
         */
    	@SysLog("导出活动用户列表")
    	@PostMapping("/export")
    	public void export(HttpServletResponse response, ThemeActivityUser themeActivityUser,ThemeActivityGift themeActivityGift) {
        
    		List<ThemeActivityUser> list = themeActivityUserService.list(Wrappers.query(themeActivityUser));
    		List<ThemeActivityGift> themeActivityGiftList = themeActivityGiftService.list(Wrappers.query(themeActivityGift));
    		List<ThemeActivityUserVO> themeActivityUserList = themeActivityUserService.wrapReceiveGiftNames(list,themeActivityGiftList);
    		ExcelUtil<ThemeActivityUserVO> util = new ExcelUtil<>(ThemeActivityUserVO.class);
    		util.exportExcel(response, themeActivityUserList, "活动目标用户列表");
    	}

#### ThemeActivityUserService ####

/**
         * @Description: 增加领取礼品的名称
         */
        List<ThemeActivityUserVO> wrapReceiveGiftNames(List<ThemeActivityUser> list,List<ThemeActivityGift> themeActivityGiftList);

#### ThemeActivityUserServiceImpl ####

@Override
    	public List<ThemeActivityUserVO> wrapReceiveGiftNames(List<ThemeActivityUser> list, List<ThemeActivityGift> themeActivityGiftList) {
        
    		if (CollUtil.isEmpty(list)) {
        
    			return null;
    		}
    		Map<String, String> themeActivityGiftsMap = new HashMap<String, String>();
    		themeActivityGiftList.stream().forEach(themeActivityGift -> {
        
    			themeActivityGiftsMap.put(themeActivityGift.getId(), themeActivityGift.getName());
    		});
    		List<ThemeActivityUserVO> themeActivityUserVOList = new ArrayList<>();
    		list.stream().forEach(themeActivityUser -> {
        
    			ThemeActivityUserVO themeActivityUserVO = new ThemeActivityUserVO();
    			//用一个map存可以领取的礼品名称和总数量
    			Map<String, String> allThemeActivityGiftsMap = new HashMap<String, String>();
    			//获取可以领取的礼品名称和总数量
    			if (ObjectUtil.isNotNull(themeActivityUser.getGiftIds())) {
        
    				String giftIds = themeActivityUser.getGiftIds();
    				if (giftIds.contains(ThemeActivityConst.COMMA)) {
        
    					log.info("可以领取多礼品 giftIds={} ", giftIds);
    					String[] giftIdsArr = giftIds.split(ThemeActivityConst.COMMA);
    					StringBuilder giftNames = new StringBuilder();
    					for (String giftId : giftIdsArr) {
        
    						for (Map.Entry<String, String> entry : themeActivityGiftsMap.entrySet()) {
        
    							if (giftId.equals(entry.getKey())) {
        
    								giftNames.append(entry.getValue()).append(ThemeActivityConst.COMMA);
    								//获得可领取礼品的id和Name
    								allThemeActivityGiftsMap.put(entry.getKey(), entry.getValue());
    							}
    						}
    					}
    					themeActivityUserVO.setGiftNames(giftNames.toString());
    					themeActivityUserVO.setGiftNumber(giftIdsArr.length);
    					BeanUtil.copyProperties(themeActivityUser, themeActivityUserVO);
    
    				} else {
        
    					log.info("可以领取单礼品 giftIds={} ", giftIds);
    					for (Map.Entry<String, String> entry : themeActivityGiftsMap.entrySet()) {
        
    						if (giftIds.equals(entry.getKey())) {
        
    							themeActivityUserVO.setGiftNames(entry.getValue());
    							themeActivityUserVO.setGiftNumber(1);
    							BeanUtil.copyProperties(themeActivityUser, themeActivityUserVO);
    						}
    						//获得可领取礼品的id和Name
    						allThemeActivityGiftsMap.put(entry.getKey(), entry.getValue());
    					}
    				}
    			}
    			//获取已经领取的礼品名称
    			String receiveGiftIds = themeActivityUser.getReceiveGiftIds();
    			List<String> receiveGiftIdsArr = StrUtil.split(receiveGiftIds, ThemeActivityConst.COMMA);
    			//排除用户还没有领取礼品的场景
    			if (ObjectUtil.isNotNull(receiveGiftIds)) {
        
    				if (receiveGiftIds.contains(ThemeActivityConst.COMMA)) {
        
    					//取已经领取的礼品名称和可以领取的礼品名称的交集
    					Collection<String> themeActivityGiftsHashKeys = CollUtil.intersection(receiveGiftIdsArr, allThemeActivityGiftsMap.keySet());
    					ArrayList<String> themeActivityGiftsHashValues = new ArrayList<>();
    					for (String key : themeActivityGiftsHashKeys) {
        
    						themeActivityGiftsHashValues.add(allThemeActivityGiftsMap.get(key));
    					}
    					String receiveGiftNames = CollUtil.join(themeActivityGiftsHashValues, ThemeActivityConst.COMMA);
    					themeActivityUserVO.setReceiveGiftNames(receiveGiftNames);
    				} else {
        
    					log.info("单礼品 receiveGiftIds={} ", receiveGiftIds);
    					for (Map.Entry<String, String> entry : allThemeActivityGiftsMap.entrySet()) {
        
    						if (receiveGiftIds.equals(entry.getKey())) {
        
    							themeActivityUserVO.setReceiveGiftNames(entry.getValue());
    						}
    					}
    				}
    			}
    			themeActivityUserVOList.add(themeActivityUserVO);
    		});
    		return themeActivityUserVOList;
    	}

[8660cb8bf100451a9d4ffd312429b589.png]: https://img-blog.csdnimg.cn/8660cb8bf100451a9d4ffd312429b589.png