java8代码优化private CollectionListListObject getSheetDatassssfinal String activityId final ListMidLevelDemocracyEvaluationVO midLevelDemocracyEvaluations = getMidLevelDemocracyEvaluationsactivity

<p>private Collection&lt;List&lt;List<Object>&gt;&gt; getSheetDatassss(final String activityId) {
final List<MidLevelDemocracyEvaluationVO> midLevelDemocracyEvaluations = getMidLevelDemocracyEvaluations(activityId);
final Map&lt;Integer, List&lt;List<Object>&gt;&gt; collect = midLevelDemocracyEvaluations.stream()
.collect(Collectors.groupingBy(
MidLevelDemocracyEvaluationVO::getOrgSort,
Collectors.mapping(this::createDataObjects, Collectors.toList())));
return collect.entrySet().stream()
.sorted(Map.Entry.comparingByKey())
.map(Map.Entry::getValue)
.collect(Collectors.toList());
}</p>
<p>private List&lt;List<Object>&gt; createDataObjects(final MidLevelDemocracyEvaluationVO midLevelEvaluation) {
return midLevelEvaluation.getExaminerInfos().stream()
.map(examinerInfo -&gt; Arrays.asList(
midLevelEvaluation.getAppraiseeOrgName(),
midLevelEvaluation.getAppraiseeName(),
midLevelEvaluation.getPositionSign(),
examinerInfo.getExaminerName(),
examinerInfo.getExaminerOrgName(),
examinerInfo.getWeight(),
examinerInfo.getWeightGroup()))
.collect(Collectors.toList());</p>