关于foreach循环中遇到的问题小结

<table class="table_style">
              <thead>
                <tr>
                  <th>
                      <input id="all" type="checkbox" onclick="selectAll();" value="checkbox"> 
                    <label>全选 </label>
                  </th>
                  <th>样本编号</th>
                  <th>被检者姓名</th>
                  <th>被检者ID</th>
                  <th>医院名称</th>
                  <th>样本类型</th>
                  <th>手机</th>
                  <th>创建时间</th>
                </tr>
              </thead>
              <c:forEach var="hello" items="${key}" step="1" >
                <tr>
                  <td>
                     <input type="checkbox"  value="${hello.iD}" name="checkbox">
                  </td>
                  <td>
                    <a href="javascript:void(0)" rel="external nofollow" >${hello.sampleNo}</a>
                  </td>
                  <td>${hello.name}</td>
                  <td>${hello.pId}</td>
                  <td>${hello.hospitalName}</td>
                  <td>${hello.sampleType}</td>
                  <td>${hello.cellPhone}</td>
                  <td>${hello.createTime}</td>
                </tr> 
              </c:forEach>  
            </table>