1.效果圖

2.jsp頁面程式碼

 <table class="defaultTable">
        <thead>
            <tr>
                <th>編號1</th>
                <th>日期</th>
                <th>進/出型別</th>
                <th>編號2</th>
            </tr>
        </thead
 
>
        <tbody>
        <c:forEach items="${mapinfo}" var="emp1">
            <tr>
                <td rowspan="${emp1.info.size()+1}">${emp1.reg}</td>
                <c:forEach items="${emp1.info}" var="emp">
                <tr>
                    <td
 
>${Student.numer1}</td>
                    <td>${Student.date}</td>
                    <td>${Student.inOut}</td>
                    <td>${Student.numer2}</td>
                </tr>
                </c:forEach>
            </tr>
        </c:forEach
 
>
        </tbody>
    </table>

3.controller程式碼

    for(int i=0;i<regno.size();i++){
            Map<String,Object> map = new HashMap<>();
            map.put("reg",regno.get(i));

            List<String> xxxLsit=xxxService.getxxList(regno.get(i));
            //通過reg獲取資訊
            List<xxx> allxxInfo=xxxService.getXXX();

            map.put("info", allxxInfo);
            list.add(map);
        }
        model.addAttribute("mapinfo", list);
        return "bc/de";