私はjsfを使用してWebアプリを開発しています。ArrayList "materialsSummaryBean.electrolyserMaterialLotList" でインデックス 0 の要素のプロパティ "brandName" を表示し、"c:forEach" を使用してすべての要素に対してこのプロパティを表示しようとしています。
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
#{materialsSummaryBean.electrolyserMaterialLotList.get(0).material.material.brandName}
<br/>
<hr/>
<c:forEach
items="#{materialsSummaryBean.electrolyserMaterialLotList}"
var="item" varStatus="loop">
#{item.material.material.brandName}
<br/>
#{item.material.material.brandName}
<br/>
#{item.material.material.brandName}
<br/>
#{item.material.material.brandName}
<br/>
#{item.material.material.brandName}
<br/>
#{item.material.material.brandName}
<br/>
#{item.material.material.brandName}
<br/>
<hr/>
</c:forEach>
結果として、インデックス0の要素の値のリストを絶対にランダム化しました:
ШБ-5
ЗШБ класс 4
МШ-39
ЗШБ класс 4
МШ-39
КПД-400И
ШБ-5
МШ-39
リスト内のすべての要素について:
ЗШБ класс 4
ЗШБ класс 4
КПД-400И
ЗШБ класс 4
ШБ-5
МШ-39
ЗШБ класс 4
<hr />
ЗШБ класс 4
ЗШБ класс 4
МШ-39
КПД-400И
ЗШБ класс 4
ШБ-5
МШ-39
<hr />
МШ-39
КПД-400И
ЗШБ класс 4
КПД-400И
ЗШБ класс 4
ШБ-5
МШ-39
<hr />
ШБ-5
ЗШБ класс 4
МШ-39
МШ-39
ШБ-5
КПД-400И
МШ-39
<hr />
そして、私はそれが何であり、何が問題なのかわかりません。
MaterialsSummaryBean メソッド「getElectrolyserMaterialLotList」:
public List<MaterialLotSummaryData> getElectrolyserMaterialLotList() {
MaterialLotFilter materialLotFilter = new MaterialLotFilter();
materialLotFilter.setElectrolyserId(id);
return materialService.getMaterialLotByElectrolyserId(materialLotFilter);
}
「getMaterialLotByElectrolyserId」メソッド:
public List<MaterialLotSummaryData> getMaterialLotByElectrolyserId(MaterialLotFilter materialLotFilter) {
Long electrolyserId = materialLotFilter.getElectrolyserId();
if (electrolyserId == null) {
throw new IllegalArgumentException("Electrolyser id cannot be null.");
}
TypedQuery<Unit> queryUnit = em.createQuery(
"select u from Unit u where u.electrolyser.id = :selectedElectrolyser",
Unit.class)
.setParameter("selectedElectrolyser", electrolyserId);
List<Unit> unitList = queryUnit.getResultList();
HashSet<MaterialLot> materialLotList = new HashSet<MaterialLot>();
HashMap<Long, Double> materialLotUsageMap = new HashMap<Long, Double>();
for (Unit unit : unitList) {
MaterialLot currentMaterialLot = unit.getMaterialLot();
if (currentMaterialLot == null) continue;
materialLotList.add(currentMaterialLot);
Double usage = unit.getActualMaterial().getAmount();
if (!materialLotUsageMap.containsKey(currentMaterialLot.getId())) {
materialLotUsageMap.put(currentMaterialLot.getId(), (usage == null) ? 0 : usage);
} else {
if(usage == null) continue;
Double currentUsage = materialLotUsageMap.get(currentMaterialLot.getId());
materialLotUsageMap.put(currentMaterialLot.getId(), currentUsage + usage);
}
}
List<MaterialLotData> result = mapper.createList(materialLotList, MaterialLotData.class);
MaterialLotSummaryData summaryData;
ArrayList<MaterialLotSummaryData> summaries = new ArrayList<MaterialLotSummaryData>();
for (MaterialLotData materialLot : result) {
if (materialLotUsageMap.containsKey(materialLot.getId())) {
summaryData = new MaterialLotSummaryData();
summaryData.setId(materialLot.getId());
summaryData.setAcceptanceDate(materialLot.getAcceptanceDate());
summaryData.setLotNumber(materialLot.getLotNumber());
summaryData.setMaterial(materialLot.getActualMaterial());
summaryData.setNumber(materialLot.getNumber());
summaryData.setManufacturer(materialLot.getManufacturer());
Double usage = materialLotUsageMap.get(materialLot.getId());
summaryData.setUsage(usage);
summaries.add(summaryData);
materialLotUsageMap.remove(materialLot.getId());
}
}
return summaries;
}