📄 session.jsp
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<%@ page errorPage="/jsp/error/myerr.jsp" %>
<html><head>
<title>Session Page</title>
<style type="text/css">
p {font-family:"Courier New,Arial";font-size:"9pt";color:balck;}
.info={font-family:"Courier New,Arial";font-size:"9pt";color:gray;}
</style>
<script language="javascript">
<!--//
function check()
{
if(document.f.datavalue.value!=""){
alert("You've input this value: "+document.f.datavalue.value);
document.f.submit();
}
}
//-->
</script>
</head>
<body>
<h1>Session Example<h1>
<%
String sName=new String(request.getParameter("dataname").getBytes("8859_1"));
String sValue=new String(request.getParameter("datavalue").getBytes("8859_1"));
if(sName!=null&&sValue!=null)
session.putValue(sName,sValue);
%>
<form action="session.jsp" method=POST name=f>
<table><tr><td>
Session ID</td><td class="info">
<%=session.getId()%></td>
</tr>
<tr><td>created:</td><td class="info"><%=session.getCreationTime()%></td>
</tr>
<tr><td>LastAccessed:</td><td class="info"><%=session.getLastAccessedTime()%></td>
</tr>
<!--session Attributes-->
<%String[] vns=session.getValueNames();
if(vns!=null && vns.length>0){
for(int i=0;i<vns.length;i++){
String name=vns[i];
String value=session.getValue(name).toString();
%>
<tr><td><%=name%></td><td class="info"><%=value%></td></tr>
<%}
}%>
<!--end of Attributes-->
<tr><td>Session Attribute Name:</td><td><input type=text size=20 name="dataname">
</td>
</tr>
<tr><td>Session Attribute Value:</td><td><input type=text size=20 name=datavalue></td></tr>
<tr><td><input type=submit></td><td><input type=reset><td></td></tr>
</table>
</form>
</body>
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