[英]Trying to implement jstl in jsp from List
这是我的Java代码:
List<EmployeeBean>questionList=adao.displayQuestions(eBean,functional_id);
model.addObject("questionList", questionList);
Iterator<EmployeeBean> iterator = questionList.iterator();
while (iterator.hasNext()) {
String q_id =iterator.next().getSk_question_id();
System.out.println("QUESTION ID :"+q_id);
List<EmployeeBean>optionList= adao.displayOptions(eBean,q_id);
model.addObject("optionList", optionList);
}
字符串q_id将基于第一个列表(questionList)具有多个ID。 基于q_id,我将从第二个列表(optionList)中获得多个选项。
这是我在jsp中尝试的方法:我无法获取optionList值。 仅获取列表的最后一个值
<c:forEach var="EmployeeBean" items="${questionList}">
${EmployeeBean.question_name }
<c:forEach var="EmployeeBean" items="${optionList}">
<div class="col-xs-4 starategy-data">
<div class="strategy-head">${EmployeeBean.answer_type }</div>
<p>${EmployeeBean.answer }</p>
</div>
</c:forEach>
</c:forEach>
一种可能的方式(如果一个q_id
没有相关的数据列表,则可能显示不正确):
List<EmployeeBean>questionList=adao.displayQuestions(eBean,functional_id);
model.addObject("questionList", questionList);
List<List<EmployeeBean>> resultList = new ArrayList<>();
Iterator<EmployeeBean> iterator = questionList.iterator();
while (iterator.hasNext()) {
String q_id = iterator.next().getSk_question_id();
System.out.println("QUESTION ID :"+q_id);
resultList.add(adao.displayOptions(eBean,q_id));//store it by index
}
model.addObject("optionList", resultList);
JSP代码:
<c:forEach var="EmployeeBean" items="${questionList}" varStatus="status">
${EmployeeBean.question_name }
<c:forEach var="EmployeeBean" items="${optionList.get(status.index)}"><!-- get the related data list -->
<div class="col-xs-4 starategy-data">
<div class="strategy-head">${EmployeeBean.answer_type }</div>
<p>${EmployeeBean.answer }</p>
</div>
</c:forEach>
</c:forEach>
另一种方式(我没有尝试过,可以测试)
Java代码:
List<EmployeeBean>questionList=adao.displayQuestions(eBean,functional_id);
model.addObject("questionList", questionList);
int index = 0;
while (iterator.hasNext()) {
String q_id = iterator.next().getSk_question_id();
System.out.println("QUESTION ID :"+q_id);
model.addObject("optionList_"+index,adao.displayOptions(eBean,q_id));
index++;
}
JSP代码:
<c:forEach var="EmployeeBean" items="${questionList}" varStatus="status">
${EmployeeBean.question_name }
<c:forEach var="EmployeeBean" items="${optionList_status.index}"><!-- not sure if it can work correct here -->
<div class="col-xs-4 starategy-data">
<div class="strategy-head">${EmployeeBean.answer_type }</div>
<p>${EmployeeBean.answer }</p>
</div>
</c:forEach>
</c:forEach>
尝试这个:
List<EmployeeBean>questionList=adao.displayQuestions(eBean,functional_id);
model.addObject("questionList", questionList);
List<EmployeeBean>optionList = new ArrayList<>();
Iterator<EmployeeBean> iterator = questionList.iterator();
while (iterator.hasNext()) {
String q_id =iterator.next().getSk_question_id();
System.out.println("QUESTION ID :"+q_id);
optionList.addAll(adao.displayOptions(eBean,q_id));
}
model.addObject("optionList", optionList);
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