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="${ sno }" onclick="setcheck(this)"></td> 31 <td><s:property value="sno"/></td> 32 <td><s:property value="sname" /></td> 33 <td><s:property value="ssex" /></td> 34 <td><s:date name="sbirthday" format="yyyy-MM-dd"/></td> 35 <td><s:property value="class_" /></td> 36 <td> 37 <s:a action="Student-update" onclick="return confirm('确认要进行修改么？')"> 38 <s:param name="sno" value="sno"></s:param> 39 <img alt="edit" src="D:123Javaworkspace est222WebContentWEB-INFimageedit.jpg"></s:a> 40 </td> 41 <td><a href='Student-delete.action?sno=<s:property value="sno"/>' onclick="return confirm('删除后的数据不可恢复，请慎重选择！ 确定要删除吗？')">【删除】</a></td></tr> 42 </s:iterator> 43 <tr align="right"> 44 <td height="30" colspan="8">查到记录：${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！ 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 }