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我遇到了问题，当我按下按钮时将值String放入List<String>内部<ui:repeat> 时，我看到它只List<String>包含 ui:repeat 的最后一个元素的记录。

<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>

util:toList来自 Baluscanswer 的想法如何在 jsf 中显示 hashmap 值？

//更新 我重写这段代码而不使用地图

<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>

但这对我没有帮助，我只能List<String>在<ui:repeat/>. 似乎在每次迭代之后 questionAnswerList 都变空了

//好吧，我读了一些文章Primefaces ManyCheckbox inside ui:repeat calls setter method only for last loop

我决定使用地图 Map>

但是在这部分错误ClassCastException字符串不能转换为列表

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>

我怎样才能得到所有选择的值List<String>？

4

1 回答 1

1

您可以制作一个地图（myMap例如调用它），其中键entry.key和值将是相同类型的列表，例如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>
于 2012-11-25T11:41:17.560 回答