我正在尝试使用 Accordion 显示组中的成员列表。我为此目的使用 jsp、el 和 servlet。
这里有两个数据库表用于理解问题
我的 servlet 如下；;
//current user's user-name
String currentUser = request.getParameter("username");
String group_name=null;
String GetGroupInfo = "select * from groups where creator_username=?";
//get all the groups where the creator's user-name is currentUser
try {
List<Group> groups = new ArrayList<Group>();
List<GroupDetails> groupList = new ArrayList<GroupDetails>();
ps3 = currentCon.prepareStatement(GetGroupInfo);
ps3.setString(1,currentUser);
rs3 = ps3.executeQuery();
//set values for Group object
while(rs3.next())
{
Group groupObj = new Group();
groupObj.setGroup_id(rs3.getString("group_id"));
groupObj.setGroup_name(rs3.getString("group_name"));
groupObj.setGroup_description(rs3.getString("group_description"));
groupObj.setCreator_username(rs3.getString("creator_username"));
groupObj.setCreated_on(rs3.getString("created_on"));
groups.add(groupObj);
String query = "select * from group_members where creator_username=? and group_id=?";
ps = currentCon.prepareStatement(query);
ps.setString(1,currentUser);
ps.setString(2, groupObj.getGroup_id());
rs = ps.executeQuery();
while(rs.next())
{
GroupDetails groupInfo = new GroupDetails();
groupInfo.setIs_admin(rs.getString("is_admin"));
groupInfo.setAdded_on(rs.getString("added_on"));
groupInfo.setCreator_username(rs.getString("creator_username"));
groupInfo.setGroup_name(rs.getString("group_name"));
groupInfo.setGroup_id(rs.getString("group_id"));
groupInfo.setUser_name(rs.getString("user_name"));
groupInfo.setMember_id(rs.getString("member_id"));
String memberFullname = "select firstname,lastname,user_type from users where username ='" + groupInfo.getUser_name() + "'";
ps2 = currentCon.prepareStatement(memberFullname);
rs2 = ps2.executeQuery();
if(rs2.next())
{
String member_fullname = rs2.getString("firstname") + " " + rs2.getString("lastname");
groupInfo.setMember_name(member_fullname);
groupInfo.setMember_usertype(rs2.getString("user_type"));
}
group_name = groupInfo.getGroup_name();
groupList.add(groupInfo);
}
}
//request group name
request.setAttribute("group_name",group_name);
request.setAttribute("individual_group", groups);
request.setAttribute("groupList", groupList);
request.setAttribute("currentUser", currentUser);
RequestDispatcher rd = request.getRequestDispatcher("/ViewAllExistingGroups");
rd.forward(request, response);
} catch (SQLException e) {
e.printStackTrace();
}
Jsp 页面以 Accordion 样式显示组 - 组名称显示在 Accordion 标题中，成员显示在 Accordion 内容中。
<body>
<% String username = (String)request.getAttribute("currentUser"); %>
<div class="container">
<div class="panel panel-default">
<div class="panel panel-heading">
</div>
<div class="panel panel-body">
<div id="accordion">
<c:forEach var="group1" items="${individual_group}">
<h5> ${group1.group_name}</h5>
<div>
<ul class="list-group">
<li class="list-group-item title">
<strong style="display:inline;"> About: <h5 style="display: inline;"> ${group1.group_description}</h5></strong>
</li>
<c:forEach var="group" items="${groupList}">
<li class="list-group-item title">
<img src="${pageContext.request.contextPath}/css/images/user.png" class="img img-circle" style="display: inline" />
<strong style="display:inline;"> ${group.member_name} <h5 style="display: inline;">(${group.member_usertype})</h5></strong>
</li>
</c:forEach>
</ul>
</div>
</c:forEach>
</div>
<br/>
<form action="ListConnectedUsers" method="get">
<input type="hidden" name="username" value="<%=username %>" />
<input type="submit" class="btn btn-default pull-left" value="Back"/>
</form>
</div>
<div class="panel panel-footer">
</div>
</div>
</div>
</body>
这就是我在 jsp 页面中得到的内容。但所有成员都显示在 Accordion 面板的每组中
每个 Accordion 部分都显示 group_members 表中的所有成员。 我希望它显示 'BEIT Classroom' 中的 3 名成员、'3 BUDDIES' 中的 3 名成员和 'SUDD GROUP' 中的 1 名成员
如果需要以我解释的方式呈现，我需要 jsp el 或任何条件的帮助。
抱歉问了这么长的问题，但我尝试正确解释它。请帮忙
最佳答案
我想我可以创建一个对象，在其中可以捆绑组名和组成员全名。
关于java - 使用jsp el显示不同组的用户列表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29335057/