Ajax implementation of asynchronous loading page, the realization of real-time information updates

Last Update:2018-07-20 Source: Internet

Author: User

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Three steps to achieve this function:

1, the mother page:

<%@ page language= "java" pageencoding= "UTF-8"%>
<%@ taglib uri= "/web-inf/config/struts-bean.tld" prefix= "Bean"%>
<%@ taglib uri= "/web-inf/config/struts-html.tld" prefix= "html"%>
<%@ taglib uri= "/web-inf/config/struts-logic.tld" prefix= "logic"%>
<%@ taglib uri= "/web-inf/config/ajj-html.tld" prefix= "ahtml"%>
<% @taglib uri= "Http://java.sun.com/jstl/core" prefix= "C"%>
<%@ page iselignored= "false"%>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title></title>
<link href= "Csslib/style_exammanager.css" rel= "stylesheet" type= "Text/css"/>
<script src= "Js/jquery.js" type= "Text/javascript" charset= "gb2312" > </script>
<script language= "javascript" type= "Text/javascript" >
SetInterval (show,120000), execute the Show method regularly, and refresh the examination information in real time
$ (document). Ready (function () {
Show ();
});
Function Show () {
$ ("#table_out"). HTML ("Information loading ...");
$.post ("Exammanager.do",
{
Operation: "Showexam"
},
function (data) {//The data returned here is a page (this page is a table, excluding the body, etc.)
$ ("#table_out"). HTML (data)//To embed the return page in the div of the current page
}
);
}
</script>

<body bgcolor= "Transparent" >
<div id= "right_table" class= "Float_left" >
<table border= "0" cellspacing= "0" cellpadding= "0" class= "width_95" >
<tr>
&LT;TD width= "9" ></td>
&LT;TD class= "Bg_topright" ></td>
</tr>
</table>
<div id= "Table_out" class= "width_95" >

</div>
<table border= "0" cellspacing= "0" cellpadding= "0" class= "width_95" style= "font-size:13px"; >
<tr>
&LT;TD width= "9" ></td>"
&LT;TD valign= "Middle" class= "bg_bottomright" ><div id= "page" class= "Algin_right" >
</div></td>
</tr>
</table>
</div>

</body>

===================================

2, the background action method:

=====================================

Public Actionforward Showexam (actionmapping mapping, Actionform form,
HttpServletRequest request, HttpServletResponse response) {

List list=service.getrealtimeexamimformation ();
Request.setattribute ("list", list);
Return Mapping.findforward ("showtest_table");
}

===========================

3. Ajax returned Subpages (showtest_table.jsp):

===========================================

<table style= "font-size:13px" width= "100%" border= "0" cellpadding= "0" cellspacing= "0" class= "border_1px" >
<tr>
<th><div class= "title_th" > Contact way </div><div class= "Title_line float_right" >|</div>< /th>
<th><div class= "title_th" > Name </div><div class= "Title_line float_right" >|</div></ Th>
<th><div class= "title_th" > Gender </div><div class= "Title_line float_right" >|</div></ Th>
<th><div class= "title_th" > ID number </div><div class= "Title_line float_right" >|</div> </th>
<th><div class= "title_th" > Admission number </div><div class= "Title_line float_right" >|</div> </th>
<th><div class= "title_th" > Exam time </div><div class= "Title_line float_right" >|</div>< /th>
<th><div class= "title_th" > Examination status </div><div class= "Title_line float_right" >|</div>< /th>
</tr>
<logic:present name= "List" >
<logic:iterate id= "list" indexid= "index" name= "list" >
<tr onmouseover= "This.classname= ' bg_over ';" onmouseout= "this.classname= ' bg_out ';" >
<td>
<c:if test= "${list.lxdh006==" | | List.lxdh006==null} ">
No contact phone
</c:if>

<ahtml:write name= "list" property= "lxdh006" type= "Lxdh"/>
</td>
<td>
<ahtml:write name= "list" property= "xm006" type= "XM"/>
</td>
<td>
<ahtml:write name= "list" property= "xb006" type= "XB"/>
</td>
<td>
${LIST.SFZHM006}
</td>
<td>
<ahtml:write name= "list" property= "kswyh007" type= "Kswyh"/>
</td>
<td>
<bean:write name= "list" property= "kssj059" format= "Yyyy-mm-dd HH:mm:ss"/>
</td>
<td>
<c:if test= "${list.jj059== ' 1 '}" >
Have handed in the papers
</c:if>
<c:if test= "${list.jj059== ' 2 '}" >
${list.zwapid059}
</c:if>
<c:if test= "${list.jj059== ' 0 '}" >
<font color= "Red" > </font>
</c:if>
</td>
</tr>
</logic:iterate>
</logic:present>
</table>

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