![](/img/trans.png)
[英]JSF: display h:selectManyCheckBox vertically in h:dataTable
[英]JSF h:selectManyCheckbox inside ui:repeat via Map entry
我面臨的問題,當我把值作為String
到List<String>
里面<ui:repeat>
當我按下按鈕,我看到List<String>
僅僅包含了用戶界面的最后一個元素記錄:重復。
<ui:repeat value="#{util:toList(test.mapQestionsWithAnswers)}" var="entry">
<h:inputHidden value="#{entry.key.questionId}" />
<h:outputText value="#{entry.key.question}"
rendered="#{not empty entry.value}" />
<p:selectManyCheckbox value="#{test.questionAnswerList}"
layout="pageDirection">
<f:selectItems value="#{entry.value}" var="ans"
itemValue="#{entry.key.questionId} #{ans.answer.answerId}"
itemLabel="${ans.answer.answer}" />
</p:selectManyCheckbox>
</ui:repeat>
來自Baluscanswer的util:toList
的想法如何在jsf中顯示哈希圖值?
//更新我不使用map重寫此代碼
<ui:repeat value="${test.questionList}" var="question">
<h:outputText value="#{question.question}"
rendered="#{not empty question}" />
<p:selectManyCheckbox value="#{test.questionAnswerList}"
layout="pageDirection">
<f:selectItems value="#{question.questionAnswers}" var="ans"
itemValue="#{ans.questionAnswerIdentifer.questionId} #{ans.questionAnswerIdentifer.answerId}"
itemLabel="#{ans.answer.answer}" />
</p:selectManyCheckbox>
</ui:repeat>
但這對我沒有幫助,我可以進入List<String>
只是將<ui:repeat/>
最后一個問題的問題答案配對。 似乎在每個迭代問題之后,AnswerList變為空
//好,我讀了一些ui:repeat的Primefaces ManyCheckbox文章:僅在上一次循環時才調用setter方法
我決定使用地圖Map>
但是在這一部分中,無法將ClassCastException
String強制轉換為List
public List<String> getQuestionAnswerList() {
// return questionAnswerList;
List<String> selectedQuestionAnswer = new ArrayList<String>();
if (!selectedItems.isEmpty()) {
Set<Long> idsSet = selectedItems.keySet();
for(Long questionId : idsSet){
List<String> questionAnswerPair = selectedItems.get(questionId);
selectedQuestionAnswer.addAll(questionAnswerPair);
}
}
return selectedQuestionAnswer;
}
<p:selectManyCheckbox value="#{test.selectedItems[question.questionId]}"
layout="pageDirection">
<f:selectItems value="#{question.questionAnswers}" var="ans"
itemValue="#{ans.questionAnswerIdentifer.questionId} #{ans.questionAnswerIdentifer.answerId}"
itemLabel="#{ans.answer.answer}" />
</p:selectManyCheckbox>
如何獲取List<String>
所有選擇的值?
你可以做一個地圖(稱之為myMap
為例),其中關鍵是entry.key
和值是相同類型等的列表questionAnswerList
就像是
<p:selectManyCheckbox value="#{test.myMap[entry.key].questionAnswerList}"
layout="pageDirection">
<f:selectItems value="#{entry.value}" var="ans"
itemValue="#{entry.key.questionId} #{ans.answer.answerId}"
itemLabel="${ans.answer.answer}" />
</p:selectManyCheckbox>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.