JSP显示会话信息实例

package hall;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.net.*;
import java.util.*;

public class showsession extends httpservlet {
public void doget(httpservletrequest request,
httpservletresponse response)
throws servletexception, ioexception {
httpsession session = request.getsession(true);
response.setcontenttype("text/html");
printwriter out = response.getwriter();
string title = "searching the web";
string heading;
integer accesscount = new integer(0);;
if (session.isnew()) {
heading = "welcome, newcomer";
} else {
heading = "welcome back";
integer oldaccesscount =
// 在servlet api 2.2中使用getattribute而不是getvalue
(integer)session.getvalue("accesscount");
if (oldaccesscount != null) {
accesscount =
new integer(oldaccesscount.intvalue() + 1);
}
}
// 在servlet api 2.2中使用putattribute
session.putvalue("accesscount", accesscount);

out.println(servletutilities.headwithtitle(title) +
"＜body bgcolor=＼"#fdf5e6＼"＞＼n" +
"＜h1 align=＼"center＼"＞" + heading + "＜/h1＞＼n" +
"＜h2＞information on your session:＜/h2＞＼n" +
"＜table border=1 align=center＞＼n" +
"＜tr bgcolor=＼"#ffad00＼"＞＼n" +
" ＜th＞info type＜th＞value＼n" +
"＜tr＞＼n" +
" ＜td＞id＼n" +
" ＜td＞" + session.getid() + "＼n" +
"＜tr＞＼n" +
" ＜td＞creation time＼n" +
" ＜td＞" + new date(session.getcreationtime()) + "＼n" +
"＜tr＞＼n" +
" ＜td＞time of last access＼n" +
" ＜td＞" + new date(session.getlastaccessedtime()) + "＼n" +
"＜tr＞＼n" +
" ＜td＞number of previous accesses＼n" +
" ＜td＞" + accesscount + "＼n" +
"＜/table＞＼n" +
"＜/body＞＜/html＞");
}
public void dopost(httpservletrequest request,
httpservletresponse response)
throws servletexception, ioexception {
doget(request, response);
}
}