查询并显示数据库的记录，实现批量选择与删除
1 <%@page import="com.sp.web.Student"%>
2 <%@page import="java.util.List"%>
3 <%@ page language="java" contentType="text/html; charset=UTF-8"
4 pageEncoding="UTF-8"%>
5 <%@ taglib prefix="s" uri="/struts-tags" %>
6 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
7 <html>
8 <head>
9 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
10 <title>查询显示页面</title>
11 </head>
12 <body>
13 <s:include value="toubu.jsp"></s:include>
14 <table width="900" border="1" cellpadding="0" cellspacing="0" align="center" bgcolor="#feeeed">
15 <tr align="right"><td height="60" colspan="8"><s:a action="Student-back">返回首页</s:a></td></tr>
16 <tr style="font-size: 36px" align="center"><td height="40" colspan="8">学生信息表</td></tr>
17 <tr align="center">
18 <td width="120">选择<br>全选<input type="radio" name="check" onclick="checkall(this)">
19 反选<input type="radio" name="check" onclick="checkno(this)"></td>
20 <td width="120">学号</td>
21 <td width="120">姓名</td>
22 <td width="120">性别</td>
23 <td width="120">出生日期</td>
24 <td width="120">班级</td>
25 <td width="50">修改</td>
26 <td>删除</td>
27 </tr>
28 <s:iterator value="#session.list" status="sta">
29 <tr align="center">
30 <td><input type="checkbox" name="checkbox" value="${ sno }" onclick="setcheck(this)"></td>
31 <td><s:property value="sno"/></td>
32 <td><s:property value="sname" /></td>
33 <td><s:property value="ssex" /></td>
34 <td><s:date name="sbirthday" format="yyyy-MM-dd"/></td>
35 <td><s:property value="class_" /></td>
36 <td>
37 <s:a action="Student-update" onclick="return confirm(‘确认要进行修改么？‘)">
38 <s:param name="sno" value="sno"></s:param>
39 <img alt="edit" src="D:\123\Java\workspace\test222\WebContent\WEB-INF\image\edit.jpg"></s:a>
40 </td>
41 <td><a href=‘Student-delete.action?sno=<s:property value="sno"/>‘ onclick="return confirm(‘删除后的数据不可恢复，请慎重选择！\n确定要删除吗？‘)">【删除】</a></td></tr>
42 </s:iterator>
43 <tr align="right">
44 <td height="30" colspan="8">查到记录：${list.size() } 条</td></tr>
45 <s:submit action="Student-deleteAll" type="button" value="全部删除" onclick="del(this)" ></s:submit>
46 </table>
47 </body>
48 </html>
49 <script type="text/javascript">
50 var ckd = document.getElementsByName("checkbox");
51 function checkall(ckdall) {
52 if (ckdall.checked) {
53 for (var i = 0; i < ckd.length; i++) {
54 ckd[i].setAttribute("checked","checked");
55 }
56 } else {
57 for (var i = 0; i < ckd.length; i++) {
58 ckd[i].checked = false;
59 }
60
61 }
62
63
64 }
65 function checkno(ckdno) {
66 for (var i = 0; i < ckd.length; i++) {
67 if (ckd[i].checked) {
68 ckd[i].checked = false;
69 } else {
70 ckd[i].setAttribute("checked","checked");
71 }
72
73 }
74 }
75 function setcheck(checkbox) {
76 if (checkbox.checked) {
77 checkbox.setAttribute("checked","checked");
78 } else {
79 checkbox.checked = false;
80 }
81
82 }
83 function del(btn) {
84
85 var count = 0;
86 var value = "";
87 for (var i = 0; i < ckd.length; i++) {
88 if(ckd[i].checked) {
89 count += 1;
90 value += ckd[i].value + ",";
91 }
92 }
93 if (count == 0) {
94 alert("请至少选择一条数据！");
95 } else {
96 value = value.substring(0,value.lastIndexOf(","));
97 if (confirm("删除后的数据不可恢复，请慎重选择！\n确定要删除吗？")) {
98 window.location.href = "Student-deleteAll.action?snos=" + value;
99 }
100 }
101 }
102
103 </script>
Action方法：
1 public String deleteAll() {
2 String rtn = "";
3 HttpServletRequest hsq = ServletActionContext.getRequest();
4 String value = hsq.getParameter("snos");
5 String[] snos = value.split(",");
6 int i = new StudentDao().deleteall(snos);
7 if (i >= 0) {
8 rtn = "stu-deleteall";
9 } else {
10 rtn = "fail";
11 }
12 return rtn;
13 }
DAO层：
1 public int deleteall(String[] snos) {
2 int rtn = 0;
3 Student stu;
4 Configuration cfg = new Configuration().configure();
5 ServiceRegistry sr = new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();
6 SessionFactory sf = cfg.buildSessionFactory(sr);
7 Session se = sf.openSession();
8 Transaction tr = se.beginTransaction();
9
10 String hql = "delete Student where sno in " + snos ;
11 for (int i = 0; i < snos.length; i++) {
12 stu = (Student)se.get(Student.class, snos[i]);
13 se.delete(stu);
14 rtn++;
15 }
16 tr.commit();
17 se.close();
18 sf.close();
19 return rtn;
20 }
时间： 2024-07-30 13:33:58