java8 分组构建层级关系

怼烎@ 2022-11-27 08:56 201阅读 0赞

stream.groupingBy

树形结构有parentId,层级：没有上下级关系用维度分

前面没过滤就会后面组合，前面有重复部分会由此现象，加过滤器或者分组sqL,  
一般上级分好了类，下级用下级遍历分类的结果不会出现自由组合现象（即使是组合key分类），之前  
代码中出现用组合key时，key自由自合，是由于下级的结果集用了上级的结果级，下级应用上级中每类的结果集

private void buildTree(String menuVersion, List<TemplateUsed> templateUseds, List<MenuFullListVO> menuFullListVos,List<Map<String,Object>> channelCodeMaps,String flag) {
    
            List<MasterChannelGroupItem> masterChannelGroupItems= masterChannelGroupItemMapper.listAll();
            //获取日期类型
            Map<String,Object> mapPara = new HashMap<>(1000);
            mapPara.put("code",null);
            List<MasterDateType>  masterDateTypes=  masterDateTypeMapper.getMasterDateTypeList(mapPara);
            //获取时间段
            List<MasterDaypart> masterDayparts=  masterDaypartMapper.list();
            //获取售卖渠道列表
         if(null !=masterChannelGroupItems && masterChannelGroupItems.size()>0){
             masterChannelGroupItems=   masterChannelGroupItems.stream().collect( collectingAndThen(
                     toCollection(() -> new TreeSet<>(Comparator.comparing(MasterChannelGroupItem::getChannelCode))), ArrayList::new)
             );
         }
            List<MasterChannelGroupItem> finalMasterChannelGroupItems = masterChannelGroupItems;
           //收集所有涉及商品code供后续商品详情使用
            Map<String,Set<String>> codeMap = new HashMap<>(10000);
            Set<String> codeList = new HashSet<String>();
            //遍历每个模板获取对应维度
            templateUseds.stream().forEach(templateUsed->{
                //获取使用模板对应的维度信息
                List<TemplateDimension> templateDimensions = new ArrayList<>();
                MenuFullListVO menuFullListVo = new MenuFullListVO();
                menuFullListVo.setMenuGroupVer(menuVersion);
                List<TemplateDimension> resultDimensions = new ArrayList<>();
                TemplateDimension templateDimension = new TemplateDimension();
                templateDimension.setDataVersion(templateUsed.getDataVersion());
                templateDimension.setTemplateId(templateUsed.getTemplateId()+"");
                templateDimensions.add(templateDimension);
                resultDimensions =templateDimensionMapper.selectBatch(templateDimensions);
                //改为用map存---一个模板每个渠道的都放里面
                Map<String,Object> channelCodeMap = new HashMap<>(1000);
                Map<String, List<TemplateDimension>> groupByChannelCode= new HashMap<String, List<TemplateDimension>>(1000);
                if(null !=resultDimensions && resultDimensions.size()>0){
                    //售卖渠道分类，分类key不会重复
                     groupByChannelCode= resultDimensions.stream().collect(Collectors.groupingBy(TemplateDimension::getChannelCode));
                    List<ChannelCodeListVO> channelCodeListVos= new ArrayList<>();
                      //按维度构建菜单
                    buildByDimension(menuVersion, masterDateTypes, masterDayparts, finalMasterChannelGroupItems, templateUsed, channelCodeMap, groupByChannelCode, channelCodeListVos,codeList);
                    menuFullListVo.setChannelCodeList(channelCodeListVos);
                }
                channelCodeMaps.add(channelCodeMap);
                menuFullListVos.add(menuFullListVo);
                //查询当前使用模板的餐厅
                TemplateStoreParam templateStore = new TemplateStoreParam();
                templateStore.setChannelGroupCode(templateUsed.getChannelGroupCode());
                templateStore.setDataVersion(templateUsed.getDataVersion());
                templateStore.setTemplateId(templateUsed.getTemplateId()+"");
                List<TemplateStore>  templateStores=templateStoreMapper.getTemplateStoreList(templateStore);
    //            List<TemplateStore>  templateStores=templateStoreMapper.select(templateStore);
                //菜单版本.发布序号.模板IDA TODO 这里缓存模板菜单 // 菜单====菜单版本.发布序号.模板IDA  ---模板id对应店---按sort排序 处理排序
                String menuStr= JsonUtils.toJsonNull(channelCodeMap);
                redisService.set(ProductKeyUtils.getMenuKey(menuVersion, templateUsed.getSequenceNo()+"",templateUsed.getId()+""),menuStr);
                if(null!=templateStores &&templateStores.size()>0){
                    Map<String, List<TemplateDimension>> finalGroupByChannelCode = groupByChannelCode;
                    templateStores.stream().forEach(tempStore->{
                        //查出多个售卖渠道,多个售卖渠道一个菜单模板
                                for(Map.Entry<String, List<TemplateDimension>> entry : finalGroupByChannelCode.entrySet()){
                                    redisService.getRedisTemplate().opsForHash().put(ProductKeyUtils.getKeyForMenuKey(tempStore.getStoreCode(),flag),
                                            ProductKeyUtils.getSecondKeyForMenuKey(menuVersion, entry.getKey()),
                                            ProductKeyUtils.getMenuKey(menuVersion, templateUsed.getSequenceNo()+"",templateUsed.getId()+""));
                                }
    
    
                        redisService.getRedisTemplate().opsForHash().keys(ProductKeyUtils.getKeyForMenuKey(tempStore.getStoreCode(),flag));
                    });
                }
    
                System.out.println("模板维度菜单======"+menuStr);
    
            });
    
            //异步缓存商品详情
    //        codeMap.put(menuVersion,codeList);
    //        pool = new ThreadPoolExecutor(1, 2, 1000, TimeUnit.MILLISECONDS, new SynchronousQueue<Runnable>(), Executors.defaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());
    //            pool.execute(new ThreadTask(codeMap));
        }

private void buildByDimension(String menuVersion, List<MasterDateType> masterDateTypes, List<MasterDaypart> masterDayparts, List<MasterChannelGroupItem> finalMasterChannelGroupItems, TemplateUsed templateUsed, Map<String, Object> channelCodeMap, Map<String, List<TemplateDimension>> groupByChannelCode, List<ChannelCodeListVO> channelCodeListVos,Set<String> codeList) {
            //遍历售卖渠道分类
            for(Map.Entry<String, List<TemplateDimension>> entry : groupByChannelCode.entrySet()){
                ChannelCodeListVO channelCodeListVo = new ChannelCodeListVO();
                String mapKey = entry.getKey();
                channelCodeListVo.setChannelCode(mapKey);
                //获取当前售卖渠道具体信息
                MasterChannelGroupItem finalMasterChannelGroupItem = finalMasterChannelGroupItems.stream().filter(a->mapKey.equals(a.getChannelCode())).findAny().orElse(null);
                if(null !=finalMasterChannelGroupItem){
                    channelCodeListVo.setChannelName(finalMasterChannelGroupItem.getChannelName());
                }
                channelCodeListVos.add(channelCodeListVo);
                List<TemplateDimension> mapValue = entry.getValue();
                System.out.println(mapKey+":"+mapValue);
                if(null!=mapValue && mapValue.size()>0){
                    //日期类型分类
                    Map<String, List<TemplateDimension>> groupByDateType = mapValue.stream().filter(e->mapKey.equals(e.getChannelCode())).collect(Collectors.groupingBy(e -> fetchGroupKey(mapKey,e)));
    //                            Map<String, List<TemplateDimension>> collect2 = mapValue.stream().collect(Collectors.groupingBy(TemplateDimension::getDateTypeCode));
    
                    List<DateTypeForNewMenuVO> dateTypeMenuVos= new ArrayList<>();
                    for(Map.Entry<String, List<TemplateDimension>> dateType : groupByDateType.entrySet()){
                        DateTypeForNewMenuVO  dateTypeMenuVo= new DateTypeForNewMenuVO();
                        String dateTypeKey = dateType.getKey();
                        String dayType =dateTypeKey.substring(dateTypeKey.indexOf("#")+1);
                        //获取对应日期实体信息
                        MasterDateType finalMasterDateType = masterDateTypes.stream().filter(a->dayType.equals(a.getCode())).findAny().orElse(null);
                        dateTypeMenuVo.setDateTypeCode(dateTypeKey);
                        if(null !=finalMasterDateType){
                            dateTypeMenuVo.setDateTypeName(finalMasterDateType.getName());
                        }
                        dateTypeMenuVos.add(dateTypeMenuVo);
                        List<TemplateDimension> mapDateTypeValue = dateType.getValue();
                        if(null!=mapDateTypeValue && mapDateTypeValue.size()>0){
                            //得出具体餐段
                            Map<String, List<TemplateDimension>> groupByDaypart = mapDateTypeValue.stream().filter(e->dayType.equals(e.getDateTypeCode())).collect(Collectors.groupingBy(e -> fetchGroupKeyDaypart(mapKey,dayType,e)));
    //                                    Map<String, List<TemplateDimension>> collect3 = mapValue1.stream().collect(Collectors.groupingBy(TemplateDimension::getDaypartCode));
                            System.out.print(""+groupByDaypart);
                            List<DaypartForNewMenuVO> daypartMenuVos = new ArrayList<>();
                            //餐段中的处理逻辑
                            buildWithDaypart(menuVersion, masterDayparts, templateUsed, groupByDaypart, daypartMenuVos, codeList);
                            dateTypeMenuVo.setDaypartList(daypartMenuVos);
                        }
                    }
                    channelCodeListVo.setDateTypeList(dateTypeMenuVos);
                    channelCodeMap.put(channelCodeListVo.getChannelCode(),dateTypeMenuVos);
                    channelCodeMap.put("menuGroupVer",menuVersion);
                }
    //                    channelCodeMaps.add(channelCodeMap);
            }
        }

private static String fetchGroupKey(String channelCode,TemplateDimension templateDimension){
        return channelCode +"#"+ templateDimension.getDateTypeCode();
    }
    private static String fetchGroupKeyDaypart(String channelCode,String dateTypeCode,TemplateDimension templateDimension){
        return  channelCode +"#"+dateTypeCode+"#"+ templateDimension.getDaypartCode();
    }