删除选中功能
分析:
UserService:
/** * 删除选中用户 * @param ids */ void delSelectedUser(String[] ids);
UserServiceImpl:
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@Override public void delSelectedUser(String[] ids) { if (ids!=null && ids.length>0){ //遍历数组 for (String id : ids) { //调用dao删除 dao.delete(Integer.parseInt(id)); } } }
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DelSelectedServlet:
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@WebServlet("/delSelectedServlet") public class DelSelectedServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获取所有id String[] ids = request.getParameterValues("uid"); //调用service删除 UserServiceImpl service = new UserServiceImpl(); service.delSelectedUser(ids); //跳转查询所有Servlet response.sendRedirect(request.getContextPath()+"/userListServlet"); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } }
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list.jsp:进行了一些修改
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<%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!DOCTYPE html> <!-- 网页使用的语言 --> <html lang="zh-CN"> <head> <!-- 指定字符集 --> <meta charset="utf-8"> <!-- 使用Edge最新的浏览器的渲染方式 --> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <!-- viewport视口:网页可以根据设置的宽度自动进行适配,在浏览器的内部虚拟一个容器,容器的宽度与设备的宽度相同。 width: 默认宽度与设备的宽度相同 initial-scale: 初始的缩放比,为1:1 --> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 上述3个meta标签*必须*放在最前面,任何其他内容都*必须*跟随其后! --> <title>用户信息管理系统</title> <!-- 1. 导入CSS的全局样式 --> <link href="css/bootstrap.min.css" rel="stylesheet"> <!-- 2. jQuery导入,建议使用1.9以上的版本 --> <script src="js/jquery-2.1.0.min.js"></script> <!-- 3. 导入bootstrap的js文件 --> <script src="js/bootstrap.min.js"></script> <style type="text/css"> td, th { text-align: center; } </style> <script> function deleteUser(id) { //判断用户安全提示 if (confirm("确定要删除吗?")){ location.href = "${pageContext.request.contextPath}/delUserServlet?id="+id; } } window.onload = function () { //给删除选中按钮添加单击事件 document.getElementById("delSelected").onclick = function () { if (confirm("确定要删除选中的吗?")){ var flag = false; //判断是否有选中条目 var cbs = document.getElementsByName("uid"); for (let i = 0; i <cbs.length; i++) { if (cbs[i].checked){ //有一个条目选中 flag = true; break; } } if (flag){//有条目被选中 //表单提交: document.getElementById("form").submit(); } } } //1.获取第一个cb document.getElementById("firstCb").onclick = function () { //获取下边列表的所有的cd var cbs = document.getElementsByName("uid"); //遍历 for (let i = 0; i <cbs.length; i++) { //设置这些cbs[i]的checked状态=firstCb.的checked状态 cbs[i].checked = this.checked; } } } </script> </head> <body> <div class="container"> <h3 style="text-align: center">用户信息列表</h3> <div style="float: left"> <form class="form-inline"> <div class="form-group"> <label for="exampleInputName2">姓名</label> <input type="text" class="form-control" id="exampleInputName2"> </div> <div class="form-group"> <label for="exampleInputName3">籍贯</label> <input type="text" class="form-control" id="exampleInputName3"> </div> <div class="form-group"> <label for="exampleInputEmail2">邮箱</label> <input type="email" class="form-control" id="exampleInputEmail2"> </div> <button type="submit" class="btn btn-default">查询</button> </form> </div> <div style="float: right;margin:5px;"> <a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加联系人</a> <a class="btn btn-primary" href="javascript:void(0);" id="delSelected">删除选中</a> </div> <form id="form" action="${pageContext.request.contextPath}/delSelectedServlet" method="post"> <table border="1" class="table table-bordered table-hover"> <tr class="success"> <th><input type="checkbox" id="firstCb"></th> <th>编号</th> <th>姓名</th> <th>性别</th> <th>年龄</th> <th>籍贯</th> <th>QQ</th> <th>邮箱</th> <th>操作</th> </tr> <c:forEach items="${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}">修改</a> <a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id});">删除</a> </td> </tr> </c:forEach> </table> </form> <div> <nav aria-label="Page navigation"> <ul class="pagination"> <li> <a href="#" aria-label="Previous"> <span aria-hidden="true">«</span> </a> </li> <li><a href="#">1</a></li> <li><a href="#">2</a></li> <li><a href="#">3</a></li> <li><a href="#">4</a></li> <li><a href="#">5</a></li> <li> <a href="#" aria-label="Next"> <span aria-hidden="true">»</span> </a> </li> <span style="font-size: 25px;margin-left: 5px"> 共16条记录,共4页 </span> </ul> </nav> </div> </div> </body> </html>
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