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 将具有基于第一个列表 (questionList) 的多个 id。 根据 q_id,我将从第二个列表(optionList)中获取多个选项。
这是我在 jsp 中尝试的内容: 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>
最佳答案
一种可能的方式(如果q_id
没有相关数据列表,可能会显示不正确):
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>
<小时/>
另一种方式(我没试过,你可以测试一下)
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>
关于java - 尝试从列表中的jsp中实现jSTL,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49896103/