querying and displaying database records for batch selection and deletion
1<% @pageImport= "Com.sp.web.Student"%>2<% @pageImport= "Java.util.List"%>3<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "4pageencoding= "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" >789<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">Ten<title> Query Display page </title> One A<body> -<s:include value= "toubu.jsp" ></s:include> -<table width= "border=" 1 "cellpadding=" 0 "cellspacing=" 0 "align=" center "bgcolor=" #feeeed "> the<tr align= "right" ><td height= "colspan=" 8 "><s:a action=" Student-back "> Back home </s:a></td ></tr> -<tr style= "font-size:36px" align= "center" ><td height= "" colspan= "8" > Student Information Sheet </td></tr> -<TR align= "center" > -<TD width= ">" <br> Select All <input type= "Radio" name= "Check" onclick= "Checkall (This)" > +Reverse Select <input type= "Radio" name= "Check" onclick= "Checkno (This)" ></td> -<TD width= > Study No. </td> +<TD width= "> Name </td> A<TD width= > Sex </td> at<TD width= "> Date of birth </td> -<TD width= > class </td> -<TD width= "> Modify </td> -<td> Delete </td> -</tr> -<s:iterator value= "#session. List" status= "STA" > in<TR align= "center" > -<td><input type= "checkbox" name= "checkbox" Value= "${sno}" onclick= "SetCheck (This)" ></td> to<td><s:property value= "Sno"/></td> +<td><s:property value= "Sname"/></td> -<td><s:property value= "Ssex"/></td> the<td><s:date name= "Sbirthday" format= "Yyyy-mm-dd"/></td> *<td><s:property value= "Class_"/></td> $<td>Panax Notoginseng<s:a action= "Student-update" onclick= "return confirm (' Confirm that you want to modify it? ') ' > -<s:param name= "Sno" value= "Sno" ></s:param> the</s:a> +</td> A<td><a href= ' student-delete.action?sno=<s:property value= ' sno '/> ' onclick= ' return confirm (' After the deleted data is not recoverable, please choose carefully! \ nyou sure you want to delete it? ') ' > ' delete ' </a></td></tr> the</s:iterator> +<tr align= "Right" > -<TD height= "8" colspan= > Records: ${list.size ()} bar </td></tr> $<s:submit action= "Student-deleteall" type= "button" value= "Delete all" onclick= "Del (This)" ></s:submit> $</table> -</body> - the<script type= "Text/javascript" > -var CKD = document.getelementsbyname ("checkbox");Wuyi function Checkall (ckdall) { the if(ckdall.checked) { - for(var i = 0; i < ckd.length; i++) { WuCkd[i].setattribute ("Checked", "checked"); - } About}Else { $ for(var i = 0; i < ckd.length; i++) { -ckd[i].checked =false; - } - A } + the - } $ function Checkno (ckdno) { the for(var i = 0; i < ckd.length; i++) { the if(ckd[i].checked) { theckd[i].checked =false; the}Else { -Ckd[i].setattribute ("Checked", "checked"); in } the the } About } the function SetCheck (checkbox) { the if(checkbox.checked) { theCheckbox.setattribute ("Checked", "checked"); +}Else { -checkbox.checked =false; the }Bayi the } the function del (BTN) { - -var count = 0; thevar value = ""; the for(var i = 0; i < ckd.length; i++) { the if(ckd[i].checked) { theCount + = 1; -Value + = Ckd[i].value + ","; the } the } the if(count = = 0) {94Alert ("Please select at least one piece of data!") "); the}Else { theValue = value.substring (0,value.lastindexof (",")); the if(Confirm ("The deleted data is not recoverable, please choose carefully!") \ nyou sure you want to delete it? ")) {98Window.location.href = "student-deleteall.action?snos=" +value; About } - }101 }102 103</script>
Action method:
1 PublicString DeleteAll () {2String RTN = "";3HttpServletRequest HSQ =servletactioncontext.getrequest ();4String value = Hsq.getparameter ("Snos");5string[] Snos = Value.split (",");6 inti =NewStudentdao (). DeleteAll (Snos);7 if(I >= 0) {8RTN = "Stu-deleteall";9}Else {TenRTN = "Fail"; One } A returnRtn; -}
DAO Layer:
1 Public intDeleteAll (string[] snos) {2 intRTN = 0;3 Student Stu;4Configuration cfg =NewConfiguration (). Configure ();5serviceregistry sr =NewStandardserviceregistrybuilder (). Applysettings (Cfg.getproperties ()). build ();6Sessionfactory SF =Cfg.buildsessionfactory (SR);7Session SE =sf.opensession ();8Transaction TR =se.begintransaction ();9 TenString hql = "Delete Student where Sno in" +Snos; One for(inti = 0; i < snos.length; i++) { AStu = (Student) se.get (Student.class, Snos[i]); - Se.delete (stu); -rtn++; the } - tr.commit (); - se.close (); - sf.close (); + returnRtn; -}
Record Bulk Delete
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