<a class="btn btn-primary" href="javascript:void(0);" rel="external nofollow" id="delSelected">刪除選中</a>

</div>
<form id="form" action="${pageContext.request.contextPath}/delSelectedServlet" method="post">
<table border="1" class="table table-bordered table-hover">
 <tr class="success">
  <th><input type="checkbox" id="firstCb"></th>
  <th>編號</th>
  <th>姓名</th>
  <th>性別</th>
  <th>年齡</th>
  <th>籍貫</th>
  <th>QQ</th>
  <th>郵箱</th>
  <th>操作</th>
 </tr>
 <c:forEach items="${users}" var="user" varStatus="s">
  <tr>
   <td><input type="checkbox" name="uid" value="${user.id}"></td>
   <td>${s.count}</td>
   <td>${user.name}</td>
   <td>${user.gender}</td>
   <td>${user.age}</td>
   <td>${user.address}</td>
   <td>${user.qq}</td>
   <td>${user.email}</td>
   <td><a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/findUserServlet?id=${user.id}" rel="external nofollow" >修改</a>&nbsp;
    <a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id});" rel="external nofollow" >刪除</a></td>
  </tr>

 </c:forEach>
</table>
</form>

<script>
 function deleteUser(id) {
  //用戶安全提示
  if (confirm("您確定要刪除嗎？")){
   //訪問的路徑
   location.href=" ${pageContext.request.contextPath}/delUserServlet?id=" rel="external nofollow" +id;
  }
 }
 window.οnlοad=function () {
  //給刪除選中按鈕添加單擊事件
  document.getElementById("delSelected").οnclick=function () {
   if (confirm("您確定要刪除選中條目嗎？"))
    //表單提交
    document.getElementById("form").submit();
  }
  //1.獲取第一個cb
  document.getElementById("firstCb").οnclick=function () {
   //獲取下表所有的cb
   var cbs=document.getElementsByName("uid");
   //遍歷
   for (var i=0;i<cbs.length;i++){
    //設置這些cbs[i]的checked狀態=firstCb.checked
    cbs[i].checked =this.checked;
   }
  }
 }
</script>

@WebServlet("/delSelectedServlet")
public class DelSelectedServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//獲取所有id
String[] ids=request.getParameterValues(“uid”);
//調用service刪除
UserService service=new UserServiceImpl();
service.delSelectedUser(ids);
//跳轉查詢Servlet
response.sendRedirect(request.getContextPath()+"/userListServlet");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 this.doPost(request, response);
}
}

public void delSelectedUser(String[] ids) {
//遍歷數組
for (String id:ids){
//調用dao刪除
dao.deleteUser(Integer.parseInt(id));
}
}

public void updateUser(User user) {
String sql=“update userms set name=?,age=?,gender=?,address=?,qq=?,email=? where id=?”;
template.update(sql,user.getName(),user.getAge(),user.getGender(),user.getAddress(),user.getQq(),user.getEmail(),user.getId());
}