工程后期改造，加了一层首页展示，该层无需分页所以想在代码层次实现排序，而不是数据库sql

1、后端代码展示如下

private List<QcCheckStatVO> getQcCheckStatList(Map<String, Object> para, String orderByColumn, String isAsc, int pageNum, int pageSize, boolean isAdmin) throws Exception {initializeSearch(para);List<QcCheckStatVO> list;// 展示的数据集合List<QcCheckStatVO> homeDataList = new ArrayList<>(16);if (isAdmin) {list = baseMapper.selectPageViewList(para);// list 以instanceId 分组// 将在sql中聚合函数操作放到java中计算Map<String, List<QcCheckStatVO>> collect = list.stream().collect(Collectors.groupingBy(o -> o.getInstanceId()));for (String s : collect.keySet()) {extracted(homeDataList, collect, s);}// 组装排序字段if (StrUtil.isAllNotBlank(orderByColumn, isAsc)) {Comparator<QcCheckStatVO> qcCheckStatVOComparator = Comparator.comparing(QcCheckStatVO::getCreateTime).reversed().thenComparing(QcCheckStatVO::getReqFieldErrorCount);Map<Key, Comparator<QcCheckStatVO>> map = new HashMap<>(16);map.put(new Key("expectCount", SqlKeyword.ASC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getErrorCount));map.put(new Key("expectCount", SqlKeyword.DESC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getErrorCount).reversed());map.put(new Key("actualCount", SqlKeyword.ASC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getActualCount));map.put(new Key("actualCount", SqlKeyword.DESC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getActualCount).reversed());map.put(new Key("errorCount", SqlKeyword.ASC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getErrorCount));map.put(new Key("errorCount", SqlKeyword.DESC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getErrorCount).reversed());map.put(new Key("integrity", SqlKeyword.ASC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getReqFieldErrorCount));map.put(new Key("integrity", SqlKeyword.DESC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getReqFieldErrorCount).reversed());map.put(new Key("foreignRate", SqlKeyword.ASC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getForeignErrorCount));map.put(new Key("foreignRate", SqlKeyword.DESC.getSqlSegment()), Comparator.comparing(QcCheckStatVO::getForeignErrorCount).reversed());for (Key key : map.keySet()) {if (key.getField().equalsIgnoreCase(orderByColumn) && key.getDirection().equalsIgnoreCase(isAsc)) {qcCheckStatVOComparator = map.get(key);}}final List<QcCheckStatVO> sortedList = homeDataList.stream().sorted(qcCheckStatVOComparator).collect(Collectors.toList());homeDataList = sortedList;}} else {// 首页不分页，第二层才分页，所以将排序条件加上去// 组装排序字段String orderBy = "";if (StrUtil.isAllNotBlank(orderByColumn, isAsc)) {orderBy = " " + EnumExtUtil.getEnumOnValue(QcCheckStatConstants.SortFieldEnum.class, orderByColumn, "key").getValue() + " " + isAsc;para.put("sortKey", orderByColumn);if (StrUtil.equalsIgnoreCase(SqlKeyword.ASC.getSqlSegment(), isAsc)) {para.put("sortType", SqlKeyword.ASC.getSqlSegment());} else {para.put("sortType", SqlKeyword.DESC.getSqlSegment());}} else {if (isAdmin) {orderBy = " REQ_FIELD_ERROR_COUNT asc";} else {orderBy = " t1.CREATE_TIME desc ,t1.REQ_FIELD_ERROR_COUNT asc";}}try {PageHelper.startPage(pageNum, pageSize, orderBy);list = baseMapper.selectPageViewList(para);homeDataList = list;} finally {PageHelper.clearPage();}}if (CollUtil.isEmpty(list)) {return new ArrayList<>();}for (QcCheckStatVO vo : homeDataList) {// 前置机名if (ProjectConstant.ProjectName.RONGDA_DEQC.equals(projectConfig.getName())) {vo.setInstanceName(ConfigUtil.get("deqc.check.instance.name", "未知"));} else if (ProjectConstant.ProjectName.RONGDA_DESYS.equals(projectConfig.getName())) {final Instance instance = instanceCoreMapper.selectById(vo.getInstanceId());if (ObjectUtil.isNotNull(instance)) {vo.setInstanceName(instance.getInstanceName());}}// 判断实传是否为0 有的话，则显示‘异常’boolean actualCountErrorFlag = false;if (ObjectUtil.isNull(vo.getActualCount()) || vo.getActualCount().equals("0")) {actualCountErrorFlag = true;}vo.setActualCountErrorFlag(actualCountErrorFlag);// 完整性vo.setIntegrity(StrUtil.format("{}/{}", vo.getReqFieldErrorCount(), vo.getReqFieldCount()));// 饱和度// 饱和度率vo.setSaturation(StrUtil.format("{}/{}", vo.getReqFieldCount(), vo.getReqFieldErrorCount()));vo.setSaturationRate(countRate(vo.getReqFieldErrorCount().toString(), vo.getReqFieldCount().toString()));// 及时性// 及时性率if (vo.getActualCount() > 0 && !vo.getActualCountErrorFlag()) {vo.setTimeliness("正常");} else {vo.setTimeliness("异常");}// 错误率final String errorRate = countRate(vo.getErrorCount().toString(), vo.getCheckCount().toString());vo.setErrorRate(errorRate);// 外键错误率final String foreignRate = countRate(vo.getForeignErrorCount().toString(), vo.getCheckCount().toString());vo.setForeignRate(foreignRate);}return homeDataList;}